Imperial College London

DrAlfredoTomas Alquezar

Faculty of Natural SciencesDepartment of Physics

Academic Visitor
 
 
 
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+44 (0)20 7594 7805a.tomas-alquezar CV

 
 
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1108Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
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78 results found

Akerib DS, Akerlof CW, Akimov DY, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araujo HM, Arbuckle A, Armstrong JE, Arthurs M, Auyeung H, Aviles S, Bai X, Bailey AJ, Balajthy J, Balashov S, Bang J, Barry MJ, Bauer D, Bauer P, Baxter A, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Birrittella B, Boast KE, Bolozdynya AI, Boulton EM, Boxer B, Bramante R, Branson S, Bras P, Breidenbach M, Brew CAJ, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Cabrita R, Campbell JS, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Chott NI, Cole A, Coleman J, Colling D, Conley RA, Cottle A, Coughlen R, Cox G, Craddock WW, Curran D, Currie A, Cutter JE, Da Cunha JP, Dahl CE, Dardin S, Dasu S, Davis J, Davison TJR, de Viveiros L, Decheine N, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Edwards BN, Edwards J, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fiorucci S, Flaecher H, Florang IMF, Ford P, Francis VB, Fraser ED, Froborg F, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Gehman VM, Gelfand R, Genovesi J, Gerhard RM, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Gonda TG, Greenall A, Greenwood S, Gregerson G, van der Grinten MGD, Gwilliam CB, Hall CR, Hamilton D, Hans S, Hanzel K, Harrington T, Harrison A, Harrison J, Hasselkus C, Haselschwardt SJ, Hemer D, Hertel SA, Heise J, Hillbrand S, Hitchcock O, Hjemfelt C, Hoff MD, Holbrook B, Holtom E, Hor JY-K, Horn M, Huang DQ, Hurteau TW, Ignarra CM, Irving MN, Jacobsen RG, Jahangir O, Jeffery SN, Ji W, Johnson M, Johnson J, Johnson P, Jones WG, Kaboth AC, Kamaha A, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khromov AV, Khurana I, Kim YD, Kim WT, Kocher CD, Kodroff D, Konovalov AM, Korley L, Korolkova EV, Koyuncu M, Kras J, Kraus H, Kravitz SW, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kumpan AV, Kyre S, Lambertet al., 2020, The LUX-ZEPLIN (LZ) radioactivity and cleanliness control programs, European Physical Journal C: Particles and Fields, Vol: 80, Pages: 1-52, ISSN: 1124-1861

LUX-ZEPLIN (LZ) is a second-generation direct dark matter experiment with spin-independent WIMP-nucleon scattering sensitivity above 1.4×10−48cm2 for a WIMP mass of 40GeV/c2 and a 1000days exposure. LZ achieves this sensitivity through a combination of a large 5.6t fiducial volume, active inner and outer veto systems, and radio-pure construction using materials with inherently low radioactivity content. The LZ collaboration performed an extensive radioassay campaign over a period of six years to inform material selection for construction and provide an input to the experimental background model against which any possible signal excess may be evaluated. The campaign and its results are described in this paper. We present assays of dust and radon daughters depositing on the surface of components as well as cleanliness controls necessary to maintain background expectations through detector construction and assembly. Finally, examples from the campaign to highlight fixed contaminant radioassays for the LZ photomultiplier tubes, quality control and quality assurance procedures through fabrication, radon emanation measurements of major sub-systems, and bespoke detector systems to assay scintillator are presented.

Journal article

Collaboration TLUX-ZEPLIN, Akerib DS, Akerlof CW, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araújo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Bang J, Bauer D, Baxter A, Bensinger J, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birch HJ, Boast KE, Boxer B, Brás P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Cabrita R, Carels C, Carlsmith DL, Carmona-Benitez MC, Cascella M, Chan C, Chott NI, Cole A, Cottle A, Cutter JE, Dahl CE, Viveiros LD, Dobson JEY, Druszkiewicz E, Edberg TK, Eriksen SR, Fan A, Fayer S, Fiorucci S, Flaecher H, Fraser ED, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Grinten MGDVD, Hall CR, Harrison A, Haselschwardt SJ, Hertel SA, Hor JY-K, Horn M, Huang DQ, Ignarra CM, Jahangir O, Ji W, Johnson J, Kaboth AC, Kamaha AC, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khurana I, Kocher CD, Korley L, Korolkova EV, Kras J, Kraus H, Kravitz S, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Loniewski C, Lopes MI, Paredes BL, Lorenzon W, Luitz S, Lyle JM, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, McLaughlin J, Meng Y, Miller EH, Mizrachi E, Monte A, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nehrkorn C, Nelson HN, Neves F, Nikoleyczik JA, Nilima A, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Palmer J, Parveen N, Pease EK, Penning B, Pereira G, Piepke A, Pushkin K, Reichenbacher J, Rhyne CA, Richards A, Riffard Q, Rischbieter GRC, Rosero R, Rossiter P, Rutherford G, Santone D, Sazzad ABMR, Schnee RW, Schubnell M, Seymour D, Shaw S, Shutt TA, Silk JJ, Silva C, Smith R, Solmaz M, Solovov VN, Sorensen P, Stancu I, Stevens A, Stifter K, Sumner TJ, Swanson N, Szydagis M, Tan M, Taylor WC, Taylor R, Temples DJ, Terman PA, Tiedt DR, Timalsina M, Tomás A, Tripathi M, Tronstad DR Tet al., 2020, Simulations of Events for the LUX-ZEPLIN (LZ) Dark Matter Experiment, Astroparticle Physics, ISSN: 0927-6505

The LUX-ZEPLIN dark matter search aims to achieve a sensitivity to theWIMP-nucleon spin-independent cross-section down to (1-2) $\times$ $10^{-12}$pb at a WIMP mass of 40 GeV/$c^2$. This paper describes the simulationsframework that, along with radioactivity measurements, was used to support thisprojection, and also to provide mock data for validating reconstruction andanalysis software. Of particular note are the event generators, which allow usto model the background radiation, and the detector response physics used inthe production of raw signals, which can be converted into digitized waveformssimilar to data from the operational detector. Inclusion of the detectorresponse allows us to process simulated data using the same analysis routinesas developed to process the experimental data.

Journal article

Akerib DS, Akerlof CW, Alsum SK, Araujo HM, Arthurs M, Bai X, Bailey AJ, Balajthy J, Balashov S, Bauer D, Belle J, Beltrame P, Benson T, Bernard EP, Biesiadzinski TP, Boast KE, Boxer B, Bras P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Chan C, Cherwinka JJ, Cole A, Cottle A, Craddock WW, Currie A, Cutter JE, Dahl CE, de Viveiros L, Dobi A, Dobson JEY, Druszkiewicz E, Edberg TK, Edwards WR, Fan A, Fayer S, Fiorucci S, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gilchriese MGD, van der Grinten MGD, Hall CR, Hans S, Hanzel K, Haselschwardt SJ, Hertel SA, Hillbrand S, Hjemfelt C, Hoff MD, Hor JY-K, Huang DQ, Ignarra CM, Ji W, Kaboth AC, Kamdin K, Keefner J, Khaitan D, Khazov A, Kim YD, Kocher CD, Korolkova E, Kraus H, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kyre S, Lee J, Lenardo BG, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu X, Lopes M, Paredes BL, Lorenzon W, Luitz S, Lyle JM, Majewski P, Manalaysay A, Mannino RL, Maupin C, McKinsey DN, Meng Y, Miller EH, Mock J, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Nelson HN, Neves F, Nikoleyczik J, O'Sullivan K, Olcina I, Olevitch MA, Oliver-Mallory KC, Palladino KJ, Patton SJ, Pease EK, Penning B, Piepke A, Powell S, Preece RM, Pushkin K, Ratcliff BN, Reichenbacher J, Rhyne CA, Richards A, Rodrigues JP, Rosero R, Rossiter P, Saba JS, Sarychev M, Schnee RW, Schubnell M, Scovell PR, Shaw S, Shutt TA, Silk JJ, Silva C, Skarpaas K, Skulski W, Solmaz M, Solovov VN, Sorensen P, Stancu I, Stark MR, Stiegler TM, Stifter K, Szydagis M, Taylor WC, Taylor R, Taylor DJ, Temples D, Terman PA, Thomas KJ, Timalsina M, To WH, Tomas A, Tope TE, Tripathi M, Tull CE, Tvrznikova L, Utku U, Vavra J, Vacheret A, Verbus JR, Voirin E, Waldron WL, Watson JR, Webb RC, White DT, Whitis TJ, Wisniewski WJ, Witherell MS, Wolfs FLH, Woodward D, Worm SD, Yeh M, Yin J, Young Iet al., 2020, Projected WIMP sensitivity of the LUX-ZEPLIN dark matter experiment, Physical Review D: Particles, Fields, Gravitation and Cosmology, Vol: 101, Pages: 1-17, ISSN: 1550-2368

LUX-ZEPLIN (LZ) is a next-generation dark matter direct detection experiment that will operate 4850 feet underground at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, USA. Using a two-phase xenon detector with an active mass of 7 tonnes, LZ will search primarily for low-energy interactions with weakly interacting massive particles (WIMPs), which are hypothesized to make up the dark matter in our galactic halo. In this paper, the projected WIMP sensitivity of LZ is presented based on the latest background estimates and simulations of the detector. For a 1000 live day run using a 5.6-tonne fiducial mass, LZ is projected to exclude at 90% confidence level spin-independent WIMP-nucleon cross sections above 1.4×10−48  cm2 for a 40  GeV/c2 mass WIMP. Additionally, a 5σ discovery potential is projected, reaching cross sections below the exclusion limits of recent experiments. For spin-dependent WIMP-neutron(-proton) scattering, a sensitivity of 2.3×10−43  cm2 (7.1×10−42  cm2) for a 40  GeV/c2 mass WIMP is expected. With underground installation well underway, LZ is on track for commissioning at SURF in 2020.

Journal article

Akerib DS, Akerlof CW, Alsum SK, Angelides N, Araujo HM, Armstrong JE, Arthurs M, Bai X, Balajthy J, Balashov S, Baxter A, Bernard EP, Biekert A, Biesiadzinski TP, Boast KE, Boxer B, Bras P, Buckley JH, Bugaev VV, Burdin S, Busenitz JK, Carels C, Carlsmith DL, Carmona-Benitez MC, Cascella M, Chan C, Cole A, Cottle A, Cutter JE, Dahl CE, de Viveiros L, Dobson JEY, Druszkiewicz E, Edberg TK, Fan A, Fiorucci S, Flaecher H, Fruth T, Gaitskell RJ, Genovesi J, Ghag C, Gilchriese MGD, Gokhale S, van der Grinten MGD, Hall CR, Hans S, Harrison J, Haselschwardt SJ, Hertel SA, Hor JY-K, Horn M, Huang DQ, Ignarra CM, Jahangir O, Ji W, Johnson J, Kaboth AC, Kamdin K, Khaitan D, Khazov A, Kim WT, Kocher CD, Korley L, Korolkova E, Kras J, Kraus H, Kravitz SW, Kreczko L, Krikler B, Kudryavtsev VA, Leason EA, Lee J, Leonard DS, Lesko KT, Levy C, Li J, Liao J, Liao F-T, Lin J, Lindote A, Linehan R, Lippincott WH, Liu R, Liu X, Loniewski C, Lopes M, Paredes BL, Lorenzon W, Luitz S, Lyle JM, Majewski PA, Manalaysay A, Manenti L, Mannino RL, Marangou N, Marzioni MF, McKinsey DN, McLaughlin J, Meng Y, Miller EH, Monzani ME, Morad JA, Morrison E, Mount BJ, Murphy ASJ, Naim D, Naylor A, Nedlik C, Nehrkorn C, Nelson HN, Neves F, Nikoleyczik J, Nilima A, Olcina I, Oliver-Mallory KC, Pal S, Palladino KJ, Pease EK, Penning BP, Pereira G, Piepke A, Pushkin K, Reichenbacher J, Rhyne CA, Riffard Q, Rischbieter GRC, Rodrigues JP, Rosero R, Rossiter P, Rutherford G, Sazzad ABMR, Schnee RW, Schubnell M, Scovell PR, Seymour D, Shaw S, Shutt TA, Silk JJ, Silva C, Solmaz M, Solovov VN, Sorensen P, Stancul I, Stevens A, Stiegler TM, Stifter K, Szydagis M, Taylor WC, Taylors R, Temples D, Terman PA, Tiedt DR, Timalsina M, Tomas A, Tripathi M, Tvrznikova L, Utku U, Uvarov S, Vacheret A, Wang JJ, Watson JR, Webb RC, White RG, Whitis TJ, Wolfs FLH, Woodward D, Yin Jet al., 2020, Measurement of the gamma ray background in the Davis cavern at the Sanford Underground Research Facility, Astroparticle Physics, Vol: 116, Pages: 1-10, ISSN: 0927-6505

Deep underground environments are ideal for low background searches due to the attenuation of cosmic rays by passage through the earth. However, they are affected by backgrounds from γ-rays emitted by 40K and the 238U and 232Th decay chains in the surrounding rock. The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a liquid xenon TPC located within the Davis campus at the Sanford Underground Research Facility, Lead, South Dakota, at the 4850-foot level. In order to characterise the cavern background, in-situ γ-ray measurements were taken with a sodium iodide detector in various locations and with lead shielding. The integral count rates (0–3300 keV) varied from 596 Hz to 1355 Hz for unshielded measurements, corresponding to a total flux from the cavern walls of 1.9 ± 0.4 γ cms. The resulting activity in the walls of the cavern can be characterised as 220 ± 60 Bq/kg of 40K, 29 ± 15 Bq/kg of 238U, and 13 ± 3 Bq/kg of 232Th.

Journal article

Akerib DS, Akerlof CW, Akimov DY, Alquahtani A, Alsum SK, Anderson TJ, Angelides N, Araujo HM, Arbuckle A, Armstrong JE, Arthurs M, Auyeung H, Bai X, Bailey AJ, Balajthy J, Balashov S, Bang J, Barry MJ, Barthel J, Bauer D, Bauer P, Baxter A, Belle J, Beltrame P, Bensinger J, Benson T, Bernard EP, Bernstein A, Bhatti A, Biekert A, Biesiadzinski TP, Birrittella B, Boast KE, Bolozdynya A, Boulton EM, Boxer B, Bramante R, Branson S, Bras P, Breidenbach M, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Campbell JS, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Chott N, Cole A, Coleman J, Colling D, Conley RA, Cottle A, Coughlen R, Craddock WW, Curran D, Currie A, Cutter JE, da Cunha JP, Dahl CE, Dardin S, Dasu S, Davis J, Davison TJR, de Viveiros L, Decheine N, Dobi A, Dobson JEY, Druszkiewicz E, Dushkin A, Edberg TK, Edwards WR, Edwards BN, Edwards J, Elnimr MM, Emmet WT, Eriksen SR, Faham CH, Fan A, Fayer S, Fiorucci S, Flaecher H, Florang IMF, Ford P, Francis VB, Froborg F, Fruth T, Gaitskell RJ, Gantos NJ, Garcia D, Geffre A, Gehman VM, Gelfand R, Genovesi J, Gerhard RM, Ghag C, Gibson E, Gilchriese MGD, Gokhale S, Gomber B, Gonda TG, Greenall A, Greenwood S, Gregerson G, van der Grinten MGD, Gwilliam CB, Hall CR, Hamilton D, Hans S, Hanzel K, Harrington T, Harrison A, Hasselkus C, Haselschwardt SJ, Hemer D, Hertel SA, Heise J, Hillbrand S, Hitchcock O, Hjemfelt C, Hoff MD, Holbrook B, Holtom E, Hor JY-K, Horn M, Huang DQ, Hurteau TW, Ignarra CM, Irving MN, Jacobsen RG, Jahangir O, Jeffery SN, Ji W, Johnson M, Johnson J, Johnson P, Jones WG, Kaboth AC, Kamaha A, Kamdin K, Kasey V, Kazkaz K, Keefner J, Khaitan D, Khaleeq M, Khazov A, Khromov A, Khurana I, Kim YD, Kim WT, Kocher CD, Konovalov AM, Korley L, Korolkova E, Koyuncu M, Kras J, Kraus H, Kravitz SW, Krebs HJ, Kreczko L, Krikler B, Kudryavtsev VA, Kumpan A, Kyre S, Lambert AR, Landerud B, Larsen NA, Laundrie A, Leason EA, Lee HS, Lee Jet al., 2020, The LUX-ZEPLIN (LZ) experiment, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, Vol: 953, Pages: 1-22, ISSN: 0168-9002

We describe the design and assembly of the LUX-ZEPLIN experiment, a direct detection search for cosmic WIMP dark matter particles. The centerpiece of the experiment is a large liquid xenon time projection chamber sensitive to low energy nuclear recoils. Rejection of backgrounds is enhanced by a Xe skin veto detector and by a liquid scintillator Outer Detector loaded with gadolinium for efficient neutron capture and tagging. LZ is located in the Davis Cavern at the 4850’ level of the Sanford Underground Research Facility in Lead, South Dakota, USA. We describe the major subsystems of the experiment and its key design features and requirements.

Journal article

Tomás A, Araújo HM, Bailey AJ, Bayer A, Chen E, López Paredes B, Sumner TJet al., 2018, Study and mitigation of spurious electron emission from cathodic wires in noble liquid time projection chambers, Astroparticle Physics, Vol: 103, Pages: 49-61, ISSN: 0927-6505

Noble liquid radiation detectors have long been afflicted by spurious electron emission from their cathodic electrodes. This phenomenon must be understood and mitigated in the next generation of liquid xenon (LXe) experiments searching for WIMP dark matter or neutrinoless double beta decay, and in the large liquid argon (LAr) detectors for the long-baseline neutrino programmes. We present a systematic study of this spurious emission involving a series of slow voltage-ramping tests on fine metal wires immersed in a two-phase xenon time projection chamber with single electron sensitivity. Emission currents as low as 10−18A can thus be detected by electron counting, a vast improvement over previous dedicated measurements. Emission episodes were recorded at surface fields as low as ∼ 10 kV/cm in some wires and observed to have complex emission patterns, with average rates of 10–200 counts per second (c/s) and outbreaks as high as ∼ 106c/s. A fainter, less variable type of emission was also present in all untreated samples. There is evidence of a partial conditioning effect, with subsequent tests yielding on average fewer emitters occurring at different fields for the same wire. We find no evidence for an intrinsic threshold particular to the metal-LXe interface which might have limited previous experiments up to fields of at least 160 kV/cm. The general phenomenology is not consistent with enhanced field emission from microscopic filaments, but it appears instead to be related to the quality of the wire surface in terms of corrosion and the nature of its oxide layer. This study concludes that some surface treatments, in particular nitric acid cleaning applied to stainless steel wires, can bring about at least order-of-magnitude improvements in overall electron emission rates, and this should help the next generation of detectors achieve the required electrostatic performance.

Journal article

Paredes BL, Araujo HM, Froborg E, Marangou N, Olcina I, Sumner TJ, Taylor R, Tomas A, Vacheret Aet al., 2018, Response of photomultiplier tubes to xenon scintillation light, Astroparticle Physics, Vol: 102, Pages: 56-66, ISSN: 0927-6505

We present the precision calibration of 35 Hamamatsu R11410-22 photomultiplier tubes (PMTs) with xenon scintillation light centred near 175 nm. This particular PMT variant was developed specifically for the LUX-ZEPLIN (LZ) dark matter experiment. A room-temperature xenon scintillation cell coupled to a vacuum cryostat was used to study the full-face PMT response at both room and low temperature ( ∼ −100 °C), in particular to determine the quantum efficiency (QE) and double photoelectron emission (DPE) probability in LZ operating conditions. For our sample with an average QE of (32.4  ±  2.9)% at room temperature, we find a relative improvement of (17.9  ±  5.2)% upon cooling (where uncertainty values refer to the sample standard deviation). The mean DPE probability in response to single vacuum ultraviolet (VUV) photons is (22.6  ±  2.0)% at low temperature; the DPE increase relative to room temperature, measured here for the first time, was (12.2  ±  3.9)%. Evidence of a small triple photoelectron emission probability ( ∼ 0.6%) has also been observed. Useful correlations are established between these parameters and the QE as measured by the manufacturer. The single VUV photon response is also measured for one ETEL D730/9829QB, a PMT with a more standard bialkali photocathode used in the ZEPLIN-III experiment, for which we obtained a cold DPE fraction of (9.1  ±  0.1)%. Hence, we confirm that this effect is not restricted to the low-temperature bialkali photocathode technology employed by Hamamatsu. This highlights the importance of considering this phenomenon in the interpretation of data from liquid xenon scintillation and electroluminescence detectors, and from many other optical measurements in this wavelength region.

Journal article

Scovell PR, Meehan E, Araújo HM, Dobson J, Ghag C, Kraus H, Kudryavtsev VA, Liu XR, Majewski P, Paling SM, Preece RM, Saakyan R, Tomás A, Toth C, Yeoman LMet al., 2017, Low-background gamma spectroscopy at the Boulby Underground Laboratory, Astroparticle Physics, Vol: 97, Pages: 160-173, ISSN: 0927-6505

The Boulby Underground Germanium Suite (BUGS) comprises three low-background, high-purity germanium detectors operating in the Boulby Underground Laboratory, located 1.1 km underground in the north-east of England, UK. BUGS utilises three types of detector to facilitate a high-sensitivity, high-throughput radio-assay programme to support the development of rare-event search experiments. A Broad Energy Germanium (BEGe) detector delivers sensitivity to low-energy gamma-rays such as those emitted by 210 Pb and 234 Th. A Small Anode Germanium (SAGe) well-type detector is employed for efficient screening of small samples. Finally, a standard p-type coaxial detector provides fast screening of standard samples. This paper presents the steps used to characterise the performance of these detectors for a variety of sample geometries, including the corrections applied to account for cascade summing effects. For low-density materials, BUGS is able to radio-assay to specific activities down to 3.6mBqkg −1 for 234 Th and 6.6mBqkg −1 for 210 Pb both of which have uncovered some significant equilibrium breaks in the 238 U chain. In denser materials, where gamma-ray self-absorption increases, sensitivity is demonstrated to specific activities of 0.9mBqkg −1 for 226 Ra, 1.1mBqkg −1 for 228 Ra, 0.3mBqkg −1 for 224 Ra, and 8.6mBqkg −1 for 40 K with all upper limits at a 90% confidence level. These meet the requirements of most screening campaigns presently under way for rare-event search experiments, such as the LUX-ZEPLIN (LZ) dark matter experiment. We also highlight the ability of the BEGe detector to probe the X-ray fluorescence region which can be important to identify the presence of radioisotopes associated with neutron production; this is of particular relevance in experiments sensitive to nuclear recoils.

Journal article

Akerib DS, Akerlof CW, Akimov DY, Alsum SK, Araujo HM, Arnquist IJ, Arthurs M, Bai X, Bailey AJ, Balajthy J, Balashov S, Barry MJ, Belle J, Beltrame P, Benson T, Bernard EP, Bernstein A, Biesiadzinski TP, Boast KE, Bolozdynya A, Boxer B, Bramante R, Bras P, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Cottle A, Coughlen R, Craddock WW, Currie A, Dahl CE, Davison TJR, Dobi A, Dobson JEY, Druszkiewicz E, Edberg TK, Edwards WR, Emmet WT, Faham CH, Fiorucci S, Fruth T, Gaitskell RJ, Gantos N, Gehman VM, Gerhard RM, Ghag C, Gilchriese MGD, Gomber B, Hall CR, Hans S, Hanzel K, Haselschwardt S, Hertel SA, Hillbrand S, Hjernfelt C, Hoff MD, Holbrook B, Holtom E, Hoppe EW, Hor JY-K, Horn M, Huang DQ, Hurteau TW, Ignarra CM, Jacobsen RG, Ji W, Kaboth A, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khromov AV, Konovalov AM, Korolkova EV, Koyuncu M, Kraus H, Krebs HJ, Kudryavtsev VA, Kumpan AV, Kyre S, Lee C, Lee HS, Lee J, Leonard DS, Leonard R, Lesko KT, Levy C, Liao F-T, Lin J, Lindote A, Linehan RE, Lippincott WH, Liu X, Lopes MI, Paredes BL, Lorenzon W, Luitz S, Majewski P, Manalaysay A, Manenti L, Mannino RL, Markley DJ, Martin TJ, Marzioni MF, McConnell CT, McKinsey DN, Mei D-M, Meng Y, Miller EH, Mizrachi E, Mock J, Monzani ME, Morad JA, Mount BJ, Murphy ASJ, Nehrkorn C, Nelson HN, Neves F, Nikkel JA, O'Dell J, O'Sullivan K, Olcina I, Olevitch MA, Oliver-Mallory KC, Palladino KJ, Pease EK, Piepke A, Powell S, Preece RM, Pushkin K, Ratcliff BN, Reichenbacher J, Reichhart L, Rhyne CA, Richards A, Rodrigues JP, Rose HJ, Rosero R, Rossiter P, Saba JS, Sarychev M, Schnee RW, Schubnell M, Scovell PR, Shaw S, Shutt TA, Silva C, Skarpaas K, Skulski W, Solmaz M, Solovov VN, Sorensen P, Sosnovtsev VV, Stancu I, Stark MR, Stephenson S, Stiegler TM, Stifter K, Sumner TJ, Szydagis M, Taylor DJ, Taylor WC, Temples D, Terman PA, Thomas KJ, Thomson JA, Tiedt DR, Timalsina M, To WHet al., 2017, Identification of radiopure titanium for the LZ dark matter experiment and future rare event searches, Astroparticle Physics, Vol: 96, Pages: 1-10, ISSN: 0927-6505

The LUX-ZEPLIN (LZ) experiment will search for dark matter particle interactions with a detector containing a total of 10 tonnes of liquid xenon within a double-vessel cryostat. The large mass and proximity of the cryostat to the active detector volume demand the use of material with extremely low intrinsic radioactivity. We report on the radioassay campaign conducted to identify suitable metals, the determination of factors limiting radiopure production, and the selection of titanium for construction of the LZ cryostat and other detector components. This titanium has been measured with activities of 238Ue  < 1.6 mBq/kg, 238Ul  < 0.09 mBq/kg, 232The=0.28±0.03 mBq/kg, 232Thl=0.25±0.02 mBq/kg, 40K  < 0.54 mBq/kg, and 60Co  < 0.02 mBq/kg (68% CL). Such low intrinsic activities, which are some of the lowest ever reported for titanium, enable its use for future dark matter and other rare event searches. Monte Carlo simulations have been performed to assess the expected background contribution from the LZ cryostat with this radioactivity. In 1,000 days of WIMP search exposure of a 5.6-tonne fiducial mass, the cryostat will contribute only a mean background of 0.160 ± 0.001(stat) ± 0.030(sys) counts.

Journal article

Irastorza IG, Aznar F, Castel J, Cebrian S, Dafni T, Galan J, Garcia JA, Garza JG, Gomez H, Herrera DC, Iguaz FJ, Luzon G, Mirallas H, Ruiz E, Segui L, Tomas Aet al., 2016, Gaseous time projection chambers for rare event detection: results from the T-REX project. II. Dark matter (vol 1, 034, 2016), JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516

Journal article

Dafni T, Arik M, Armengaud E, Aune S, Avignone FT, Barth K, Belov A, Betz M, Braeuninger H, Brax P, Breijnholt N, Brun P, Cantatore G, Carmona JM, Carosi GP, Caspers F, Caspi S, Cetin SA, Chelouche D, Christensen FE, Collar JI, Dael A, Davenport M, Derbin AV, Desch K, Diago A, Doebrich B, Dratchnev I, Dudarev A, Eleftheriadis C, Fanourakis G, Ferrer-Ribas E, Friedrich P, Galan J, Garcia JA, Gardikiotis A, Garza JG, Gazis EN, Georgiopoulou E, Geralis T, Gimeno B, Giomataris I, Gninenko S, Gomez H, Gonzalez-Diaz D, Gruber E, Guendelman E, Guthoerl T, Hailey CJ, Hartmann R, Hauf S, Haug F, Hasinoff MD, Hiramatsu T, Hoffmann DHH, Horns D, Iguaz FJ, Irastorza IG, Isern J, Imai K, Jacoby J, Jaeckel J, Jakobsen AC, Jakovcic K, Kaminski J, Kawasaki M, Karuza M, Koenigsmann K, Kotthaus R, Krcmar M, Kousouris K, Krieger C, Kuster M, Lakic B, Laurent JM, Limousin O, Lindner A, Liolios A, Ljubicic A, Luzon G, Matsuki S, Muratova VN, Neff S, Niinikoski T, Nones C, Ortega I, Papaevangelou T, Pivovaroff MJ, Raffelt G, Redondo J, Riege H, Ringwald A, Rodriguez A, Rosu M, Russenschuck S, Ruz J, Saikawa K, Savvidis I, Sekiguchi T, Semertzidis YK, Shilon I, Sikivie P, Silva H, Solanki SK, Stewart L, ten Kates HHJ, Tomas A, Troitsky S, Vafeiadis T, van Bibber K, Vedrine P, Villar JA, Vogel JK, Walckiers L, Weltman A, Wester W, Yildiz SC, Zioutas Ket al., 2016, An update on the Axion Helioscopes front: current activities at CAST and the IAXO project., 37th International Conference on High Energy Physics (ICHEP), Publisher: ELSEVIER SCIENCE BV, Pages: 244-249, ISSN: 2405-6014

Conference paper

Irastorza IG, Aznar F, Castel J, Cebrian S, Dafni T, Galan J, Garcia JA, Garza JG, Gomez H, Herrera DC, Iguaz FJ, Luzon G, Mirallas H, Ruiz E, Segui L, Tomas Aet al., 2016, Gaseous time projection chambers for rare event detection: results from the T-REX project. I. Double beta decay, JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516

Journal article

Irastorza IG, Aznar F, Castel J, Cebrian S, Dafni T, Galan J, Garcia JA, Garza JG, Gomez H, Herrera DC, Iguaz FJ, Luzon G, Mirallas H, Ruiz E, Segui L, Tomas Aet al., 2016, Gaseous time projection chambers for rare event detection: results from the T-REX project. II. Dark matter, JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516

Journal article

Gonzalez-Diaz D, Alvarez V, Borges FIG, Camargo M, Carcel S, Cebrian S, Cervera A, Conde CAN, Dafni T, Diaz J, Esteve R, Fernandes LMP, Ferrari P, Ferreira AL, Freitas EDC, Gehmani VM, Goldschmidt A, Gomez-Cadenas JJ, Gutierrez RM, Hauptman J, Hernando Morata JA, Herrera DC, Irastorza IG, Labarga L, Laing A, Liubarsky I, Lopez-March N, Lorca D, Losada M, Luzon G, Mari A, Martin-Albo J, Martinez-Lema G, Martinez A, Miller T, Monrabal F, Monserrate M, Monteiro CMB, Mora FJ, Moutinho LM, Munoz Vidal J, Nebot-Guinot M, Nygren D, Oliveira CAB, Perez J, Perez Aparicio JL, Querol M, Renner J, Ripoll L, Rodriguez J, Santos FP, dos Santos JMF, Serra L, Shuman D, Simon A, Sofka C, Sorel M, Toledo JF, Torrent J, Tsamalaidze Z, Veloso JFCA, Villar JA, Webb R, White JT, Yahlali N, Azevedo C, Aznarab F, Calvet D, Castel J, Ferrer-Ribas E, Garcia JA, Giomataris I, Gomez H, Iguaz FJ, Lagraba A, Le Coguie A, Mols JP, Sahin O, Rodriguez A, Ruiz-Choliz E, Segui L, Tomas A, Veenhof Ret al., 2015, Accurate gamma and MeV-electron track reconstruction with an ultra-low diffusion Xenon/TMA TPC at 10 atm, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 804, Pages: 8-24, ISSN: 0168-9002

Journal article

Galan J, Dafni T, Ferrer-Ribas E, Giomataris I, Iguaz FJ, Irastorza IG, Garcia JA, Garza JG, Luzon G, Papaevangelou T, Redondo J, Tomas Aet al., 2015, Exploring 0.1-10 eV axions with a new helioscope concept, JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, ISSN: 1475-7516

Journal article

Collaboration TLZ, Akerib DS, Akerlof CW, Akimov DY, Alsum SK, Araújo HM, Bai X, Bailey AJ, Balajthy J, Balashov S, Barry MJ, Bauer P, Beltrame P, Bernard EP, Bernstein A, Biesiadzinski TP, Boast KE, Bolozdynya AI, Boulton EM, Bramante R, Buckley JH, Bugaev VV, Bunker R, Burdin S, Busenitz JK, Carels C, Carlsmith DL, Carlson B, Carmona-Benitez MC, Cascella M, Chan C, Cherwinka JJ, Chiller AA, Chiller C, Craddock WW, Currie A, Cutter JE, Cunha JPD, Dahl CE, Dasu S, Davison TJR, Viveiros LD, Dobi A, Dobson JEY, Druszkiewicz E, Edberg TK, Edwards BN, Edwards WR, Elnimr MM, Emmet WT, Faham CH, Fiorucci S, Ford P, Francis VB, Fu C, Gaitskell RJ, Gantos NJ, Gehman VM, Gerhard RM, Ghag C, Gilchriese MGD, Gomber B, Hall CR, Harris A, Haselschwardt SJ, Hertel SA, Hoff MD, Holbrook B, Holtom E, Huang DQ, Hurteau TW, Ignarra CM, Jacobsen RG, Ji W, Ji X, Johnson M, Ju Y, Kamdin K, Kazkaz K, Khaitan D, Khazov A, Khromov AV, Konovalov AM, Korolkova EV, Kraus H, Krebs HJ, Kudryavtsev VA, Kumpan AV, Kyre S, Larsen NA, Lee C, Lenardo BG, Lesko KT, Liao F-T, Lin J, Lindote A, Lippincott WH, Liu J, Liu X, Lopes MI, Lorenzon W, Luitz S, Majewski P, Malling DC, Manalaysay AG, Manenti L, Mannino RL, Markley DJ, Martin TJ, Marzioni MF, McKinsey DN, Mei D-M, Meng Y, Miller EH, Mock J, Monzani ME, Morad JA, Murphy ASJ, Nelson HN, Neves F, Nikkel JA, O'Neill FG, O'Dell J, O'Sullivan K, Olevitch MA, Oliver-Mallory KC, Palladino KJ, Pangilinan M, Patton SJ, Pease EK, Piepke A, Powell S, Preece RM, Pushkin K, Ratcliff BN, Reichenbacher J, Reichhart L, Rhyne C, Rodrigues JP, Rose HJ, Rosero R, Saba JS, Sarychev M, Schnee RW, Schubnell MSG, Scovell PR, Shaw S, Shutt TA, Silva C, Skarpaas K, Skulski W, Solovov VN, Sorensen P, Sosnovtsev VV, Stancu I, Stark MR, Stephenson S, Stiegler TM, Sumner TJ, Sundarnath K, Szydagis M, Taylor DJ, Taylor W, Tennyson BP, Terman PA, Thomas KJ, Thomson JA, Tiedt DR, To WH, Tomás A, Tripathi M, Tull CE, Tvrznikova L, Uvarov S, Va'vra J, Grinten MGDVDet al., 2015, LUX-ZEPLIN (LZ) Conceptual Design Report

The design and performance of the LUX-ZEPLIN (LZ) detector is described as ofMarch 2015 in this Conceptual Design Report. LZ is a second-generationdark-matter detector with the potential for unprecedented sensitivity to weaklyinteracting massive particles (WIMPs) of masses from a few GeV/c2 to hundredsof TeV/c2. With total liquid xenon mass of about 10 tonnes, LZ will be the mostsensitive experiment for WIMPs in this mass region by the end of the decade.This report describes in detail the design of the LZ technical systems.Expected backgrounds are quantified and the performance of the experiment ispresented. The LZ detector will be located at the Sanford Underground ResearchFacility in South Dakota. The organization of the LZ Project and a summary ofthe expected cost and current schedule are given.

Report

Renner J, Gehman VM, Goldschmidt A, Matis HS, Miller T, Nakajima Y, Nygren D, Oliveira CAB, Shuman D, Alvarez V, Borges FIG, Carcel S, Castel J, Cebrian S, Cervera A, Conde CAN, Dafni T, Dias THVT, Diaz J, Esteve R, Evtoukhovitch P, Fernandes LMP, Ferrario P, Ferreira AL, Freitas EDC, Gil A, Gomez H, Gomez-Cadenas JJ, Gonzalez-Diaz D, Gutierrez RM, Hauptman J, Morata JAH, Herrera DC, Iguaz FJ, Irastorza IG, Jinete MA, Labarga L, Laing A, Liubarsky I, Lopes JAM, Lorca D, Losada M, Luzon G, Mari A, Martin-Albo J, Martinez A, Moiseenko A, Monrabal F, Monserrate M, Monteiro CMB, Mora FJ, Moutinho LM, Vidal JM, da Luz HN, Navarro G, Nebot-Guinot M, Palma R, Perez J, Aparicio JLP, Ripoll L, Rodriguez A, Rodriguez J, Santos FP, dos Santos JMF, Segui L, Serra L, Simon A, Sofka C, Sorel M, Toledo JF, Tomas A, Torrent J, Tsamalaidze Z, Veloso JFCA, Villar JA, Webb RC, White J, Yahlali Net al., 2015, Ionization and scintillation of nuclear recoils in gaseous xenon, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, Vol: 793, Pages: 62-74, ISSN: 0168-9002

Journal article

Arik M, Aune S, Barth K, Belov A, Braeuninger H, Bremer J, Burwitz V, Cantatore G, Carmona JM, Cetin SA, Collar JI, Da Riva E, Dafni T, Davenport M, Dermenev A, Eleftheriadis C, Elias N, Fanourakis G, Ferrer-Ribas E, Galan J, Garcia JA, Gardikiotis A, Garza JG, Gazis EN, Geralis T, Georgiopoulou E, Giomataris I, Gninenko S, Marzoa MG, Hasinoff MD, Hoffmann DHH, Iguaz FJ, Irastorza IG, Jacoby J, Jakovcic K, Karuza M, Kavuk M, Krcmar M, Kuster M, Lakic B, Laurent JM, Liolios A, Ljubicic A, Luzon G, Neff S, Niinikoski T, Nordt A, Ortega I, Papaevangelou T, Pivovaroff MJ, Raffelt G, Rodriguez A, Rosu M, Ruz J, Savvidis I, Shilon I, Solanki SK, Stewart L, Tomas A, Vafeiadis T, Villar J, Vogel JK, Yildiz SC, Zioutas Ket al., 2015, New solar axion search using the CERN Axion Solar Telescope with He-4 filling, PHYSICAL REVIEW D, Vol: 92, ISSN: 1550-7998

Journal article

Cebrian S, Dafni T, Ferrer-Ribas E, Giomataris I, Gonzalez-Diaz D, Gomez H, Herrera DC, Iguaz FJ, Irastorza IG, Luzon G, Rodriguez A, Segui L, Tomas Aet al., 2015, Micromegas-TPC operation at high pressure in xenon-trimethylamine mixtures (vol 8, P01012, 2013), JOURNAL OF INSTRUMENTATION, Vol: 10, ISSN: 1748-0221

Journal article

Vogel JK, Armengaud E, Avignone FT, Betz M, Brax P, Brun P, Cantatore G, Carmona JM, Carosi GP, Caspers F, Caspi S, Cetin SA, Chelouche D, Christensen FE, Dael A, Dafni T, Davenport M, Derbin AV, Desch K, Diago A, Doebrich B, Dratchnev I, Dudarev A, Eleftheriadis C, Fanourakis G, Ferrer-Ribas E, Galan J, Garcia JA, Garza JG, Geralis T, Gimeno B, Giomataris I, Gninenko S, Gomez H, Gonzalez-Diaz D, Guendelman E, Hailey CJ, Hiramatsu T, Hoffmann DHH, Horns D, Iguaz FJ, Irastorza IG, Isern J, Imai K, Jakobsen AC, Jaeckel J, Jakovcic K, Kaminski J, Kawasaki M, Karuza M, Krcmar M, Kousouris K, Krieger C, Lakic B, Limousin O, Lindner A, Liolios A, Luzon G, Matsuki S, Muratova VN, Nones C, Ortega I, Papaevangelou T, Pivovaroff MJ, Raffelt G, Redondo J, Ringwald A, Russenschuck S, Ruz J, Saikawa K, Savvidis I, Sekiguchi T, Semertzidis YK, Shilon I, Sikivie P, Silva H, ten Kate H, Tomas A, Troitsky S, Vafeiadis T, van Bibber K, Vedrine P, Villar JA, Walckiers L, Weltman A, Wester W, Yildiz SC, Zioutas Ket al., 2015, The next generation of axion helioscopes: The International Axion Observatory (IAXO), 13th International Conference on Topics in Astroparticle and Underground Physics (TAUP), Publisher: ELSEVIER SCIENCE BV, Pages: 193-200, ISSN: 1875-3892

Conference paper

Garza JG, Aune S, Aznar F, Calvet D, Castel JF, Christensen FE, Dafni T, Davenport M, Decker T, Ferrer-Ribas E, Galan J, Garcia JA, Giomataris I, Hill RM, Iguaz FJ, Irastorza IG, Jakobsen AC, Jourde D, Mirallas H, Ortega I, Papaevangelou T, Pivovaroff MJ, Ruz J, Tomas A, Vafeiadis T, Vogel JKet al., 2015, Low Background Micromegas in CAST, 7TH INTERNATIONAL SYMPOSIUM ON LARGE TPCS FOR LOW-ENERGY RARE EVENT DETECTION, Vol: 650, ISSN: 1742-6588

Journal article

Rebel B, Hall C, Bernard E, Faham CH, Ito TM, Lundberg B, Messina M, Monrabal F, Pereverzev SP, Resnati F, Rowson PC, Soderberg M, Strauss T, Tomas A, Va'vra J, Wang Het al., 2014, High voltage in noble liquids for high energy physics, JOURNAL OF INSTRUMENTATION, Vol: 9, ISSN: 1748-0221

Journal article

Armengaud E, Avignone FT, Betz M, Brax P, Brun P, Cantatore G, Carmona JM, Carosi GP, Caspers F, Caspi S, Cetin SA, Chelouche D, Christensen FE, Dael A, Dafni T, Davenport M, Derbin AV, Desch K, Diago A, Doebrich B, Dratchnev I, Dudarev A, Eleftheriadis C, Fanourakis G, Ferrer-Ribas E, Galan J, Garcia JA, Garza JG, Geralis T, Gimeno B, Giomataris I, Gninenko S, Gomez H, Gonzalez-Diaz D, Guendelman E, Hailey CJ, Hiramatsu T, Hoffmann DHH, Horns D, Iguaz FJ, Irastorza IG, Isern J, Imai K, Jakobsen AC, Jaeckel J, Jakovcic K, Kaminski J, Kawasaki M, Karuza M, Krcmar M, Kousouris K, Krieger C, Lakic B, Limousin O, Lindner A, Liolios A, Luzon G, Matsuki S, Muratova VN, Nones C, Ortega I, Papaevangelou T, Pivovaroff MJ, Raffelt G, Redondo J, Ringwald A, Russenschuck S, Ruz J, Saikawa K, Savvidis I, Sekiguchi T, Semertzidis YK, Shilon I, Sikivie P, Silva H, ten Kate H, Tomas A, Troitsky S, Vafeiadis T, van Bibber K, Vedrine P, Villar JA, Vogel JK, Walckiers L, Weltman A, Wester W, Yildiz SC, Zioutas Ket al., 2014, Conceptual design of the International Axion Observatory (IAXO), JOURNAL OF INSTRUMENTATION, Vol: 9, ISSN: 1748-0221

Journal article

Alvarez V, Borges FIGM, Carcel S, Castel J, Cebrian S, Cervera A, Conde CAN, Dafni T, Dias THVT, Diaz J, Egorov M, Esteve R, Evtoukhovitch P, Fernandes LMP, Ferrario P, Ferreira AL, Freitas EDC, Gehman VM, Gil A, Goldschmidt A, Gomez H, Gomez-Cadenas JJ, Gonzalez-Diaz D, Gutierrez RM, Hauptman J, Hernando Morata JA, Herrera DC, Iguaz FJ, Irastorza IG, Jinete MA, Labarga L, Laing A, Liubarsky I, Lopes JAM, Lorca D, Losada M, Luzon G, Mari A, Martin-Albo J, Martinez A, Martinez-Lema G, Miller T, Moiseenko A, Monrabal F, Monteiro CMB, Mora FJ, Moutinho LM, Munoz Vidal J, da Luz HN, Navarro G, Nebot-Guinot M, Nygren D, Oliveira CAB, Palma R, Perez J, Perez Aparicio JL, Renner J, Ripoll L, Rodriguez A, Rodriguez J, Santos FP, dos Santos JMF, Segui L, Serra L, Shuman D, Simon A, Sofka C, Sorel M, Toledo JF, Tomas A, Torrent J, Tsamalaidze Z, Vazquez D, Veloso JFCA, Villar JA, Webb RC, White JT, Yahlali N, Aznar F, Calvet D, Druillole F, Ferrer-Ribas E, Garcia JA, Giomataris I, Gracia J, Le Coguie A, Mols JP, Pons P, Ruiz Eet al., 2014, Characterization of a medium size Xe/TMA TPC instrumented with microbulk Micromegas, using low-energy gamma-rays, JOURNAL OF INSTRUMENTATION, Vol: 9, ISSN: 1748-0221

Journal article

Arik M, Aune S, Barth K, Belov A, Borghi S, Braeuninger H, Cantatore G, Carmona JM, Cetin SA, Collar JI, Da Riva E, Dafni T, Davenport M, Eleftheriadis C, Elias N, Fanourakis G, Ferrer-Ribas E, Friedrich P, Galan J, Garcia JA, Gardikiotis A, Garza JG, Gazis EN, Geralis T, Georgiopoulou E, Giomataris I, Gninenko S, Gomez H, Marzoa MG, Gruber E, Guthoerl T, Hartmann R, Hauf S, Haug F, Hasinoff MD, Hoffmann DHH, Iguaz FJ, Irastorza IG, Jacoby J, Jakovcic K, Karuza M, Koenigsmann K, Kotthaus R, Krcmar M, Kuster M, Lakic B, Lang PM, Laurent JM, Liolios A, Ljubicic A, Luzon G, Neff S, Niinikoski T, Nordt A, Papaevangelou T, Pivovaroff MJ, Raffelt G, Riege H, Rodriguez A, Rosu M, Ruz J, Savvidis I, Shilon I, Silva PS, Solanki SK, Stewart L, Tomas A, Tsagri M, van Bibber K, Vafeiadis T, Villar J, Vogel JKet al., 2014, Search for Solar Axions by the CERN Axion Solar Telescope with He-3 Buffer Gas: Closing the Hot Dark Matter Gap, PHYSICAL REVIEW LETTERS, Vol: 112, ISSN: 0031-9007

Journal article

Alvarez V, Aznar F, Borges FIGM, Calvet D, Carcel S, Castel J, Cebrian S, Cervera A, Conde CAN, Dafni T, Dias THVT, Diaz J, Druillole F, Egorov M, Esteve R, Evtoukhovitch P, Fernandes LMP, Ferrario P, Ferreira AL, Ferrer-Ribas E, Freitas EDC, Gehman VM, Gil A, Giomataris I, Goldschmidt A, Gomez H, Gomez-Cadenas JJ, Gonzalez-Diaz D, Gutierrez RM, Hauptman J, Hernando Morata JA, Herrera DC, Iguaz FJ, Irastorza IG, Jinete MA, Labarga L, Laing A, Le Coguie A, Liubarsky I, Lopes JAM, Lorca D, Losada M, Luzon G, Mari A, Martin-Albo J, Martinez A, Martinez-Lema G, Miller T, Moiseenko A, Mols JP, Monrabal F, Monteiro CMB, Mora FJ, Moutinho LM, Munoz Vidal J, Natal da Luz H, Navarro G, Nebot-Guinot M, Nygren D, Oliveira CAB, Palma R, Perez J, Perez Aparicio JL, Renner J, Ripoll L, Rodriguez A, Rodriguez J, Santos FP, dos Santos JMF, Segui L, Serra L, Shuman D, Simon A, Sofka C, Sorel M, Toledo JF, Tomas A, Torrent J, Tsamalaidze Z, Veloso JFCA, Villar JA, Webb RC, White JT, Yahlali Net al., 2014, Description and commissioning of NEXT-MM prototype: first results from operation in a Xenon-Trimethylamine gas mixture, JOURNAL OF INSTRUMENTATION, Vol: 9, ISSN: 1748-0221

Journal article

Aune S, Castel JF, Dafni T, Davenport M, Fanourakis G, Ferrer-Ribas E, Galan J, Garcia JA, Gardikiotis A, Geralis T, Giomataris I, Gomez H, Garza JG, Herrera DC, Iguaz FJ, Irastorza IG, Jourde D, Luzon G, Mols JP, Papaevangelou T, Rodriguez A, Ruz J, Segui L, Tomas A, Vafeiadis T, Yildiz SCet al., 2014, Low background x-ray detection with Micromegas for axion research, JOURNAL OF INSTRUMENTATION, Vol: 9, ISSN: 1748-0221

Journal article

Cebrian S, Dafni T, Gomez H, Herrera DC, Iguaz FJ, Irastorza IG, Luzon G, Segui L, Tomas Aet al., 2013, Pattern recognition of Xe-136 double beta decay events and background discrimination in a high pressure xenon TPC, JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, Vol: 40, ISSN: 0954-3899

Journal article

Aune S, Aznar F, Calvet D, Dafni T, Diago A, Druillole F, Fanourakis G, Ferrer-Ribas E, Galan J, Garcia JA, Gardikiotis A, Garza JG, Geralis T, Giomataris I, Gomez H, Gonzalez-Diaz D, Herrera DC, Iguaz FJ, Irastorza IG, Jourde D, Luzon G, Mirallas H, Mols JP, Papaevangelou T, Rodriguez A, Segui L, Tomas A, Vafeiadis T, Yildiz SCet al., 2013, X-ray detection with Micromegas with background levels below 10(-6) keV(-1)cm(-2)s(-1), JOURNAL OF INSTRUMENTATION, Vol: 8, ISSN: 1748-0221

Journal article

Aznar F, Castel J, Cebrian S, Dafni T, Diago A, Garcia JA, Garza JG, Gomez H, Gonzalez-Diaz D, Herrera DC, Iguaz FJ, Irastorza IG, Luzon G, Mirallas H, Olivan MA, Ortiz de Solorzano A, Pons P, Rodriguez A, Ruiz E, Segui L, Tomas A, Villar JAet al., 2013, Assessment of material radiopurity for Rare Event experiments using Micromegas, 3rd International Conference on Micro Pattern Gaseous Detectors, Publisher: IOP PUBLISHING LTD, ISSN: 1748-0221

Conference paper

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