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Journal articleHori M, 2011,
Progress in precise laser spectroscopy of antiprotonic helium atoms
, CANADIAN JOURNAL OF PHYSICS, Vol: 89, Pages: 1-5, ISSN: 0008-4204- Author Web Link
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- Citations: 3
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Conference paperLeader E, Sidorov AV, Stamenov DB, 2011,
The role of semi inclusive DIS data in determining polarized PDFs
, 19th International Spin Physics Symposium (SPIN2010), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588- Author Web Link
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- Citations: 2
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Conference paperPasternak J, Aslaninejad M, Berg JS, et al., 2011,
Injection/Extraction Studies In The Non-scaling FFAG For The Neutrino Factory
, 12th International Workshop on Neutrino Factories, Super-beams and Beta-beams (NUFACT), Publisher: AMER INST PHYSICS, ISSN: 0094-243X -
Conference paperSolovov VN, Belov VA, Akimov DY, et al., 2011,
Position Reconstruction in a Dual Phase Xenon Scintillation Detector
, IEEE Nuclear Science Symposium/Medical Imaging Conference (NSS/MIC)/18th International Workshop on Room-Temperature Semiconductor X-Ray and Gamma-Ray Detectors, Publisher: IEEE, Pages: 1226-1233, ISSN: 1095-7863- Author Web Link
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- Citations: 1
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Conference paperAraujo H, Canizares P, Chmeissani M, et al., 2011,
Milli-Hertz Gravitational Waves: <i>LISA</i> and <i>LISA PathFinder</i>
, Spanish Relativity Meeting (ERE 2010) on Gravity as a Crossroad in Physics, Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588- Cite
- Citations: 4
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Conference paperSummer TJ, 2011,
Direct dark matter searches - recent highlights
, International Nuclear Physics Conference (INPC), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588- Author Web Link
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- Citations: 3
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Conference paperHori M, 2011,
LASER SPECTROSCOPY OF ANTIPROTONIC HELIUM AT CERN'S ANTIPROTON DECELERATOR FACILITY
, 5th Meeting on CPT and Lorentz Symmetry, Publisher: WORLD SCIENTIFIC PUBL CO PTE LTD, Pages: 11-14 -
Conference paperTodoroki K, Kobayashi T, Hori M, 2011,
Development of Beam Profile Monitor for Antiproton Annihilation Cross Section Measurements by the ASACUSA Collaboration
, International Nuclear Physics Conference (INPC), Publisher: IOP PUBLISHING LTD, ISSN: 1742-6588- Author Web Link
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- Citations: 2
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Journal article, 2011,
Single electron emission in two-phase xenon with application to the detection of coherent neutrino-nucleus scattering
, The journal of high energy physics, Vol: 2011, Pages: 1-20, ISSN: 1126-6708 -
Journal articleSanchez PDA, Lees JP, Poireau V, et al., 2010,
Observation of the Y(1<SUP>3</SUP><i>D<sub>J</sub></i>) bottomonium state through decays to π<SUP>+</SUP>π<SUP>-</SUP>Y(1<i>S</i>)
, PHYSICAL REVIEW D, Vol: 82, ISSN: 1550-7998- Cite
- Citations: 28
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Journal articleLeader E, Sidorov AV, Stamenov DB, 2010,
Determination of polarized parton densities from a QCD analysis of inclusive and semi-inclusive deep inelastic scattering data
, PHYSICAL REVIEW D, Vol: 82, ISSN: 1550-7998- Cite
- Citations: 155
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Journal articleKhachatryan V, Sirunyan AM, Tumasyan A, et al., 2010,
Search for Quark Compositeness with the Dijet Centrality Ratio in <i>pp</i> Collisions at √<i>s</i>=7 TeV
, PHYSICAL REVIEW LETTERS, Vol: 105, ISSN: 0031-9007- Cite
- Citations: 42
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Journal articleAbazov VM, Abbott B, Abolins M, et al., 2010,
Search for <i>ZH</i> → <i>l</i><SUP>+</SUP><i>l</i><SUP>-</SUP> <i>b</i>(<i>b</i>)over-bar Production in 4.2 fb<SUP>-1</SUP> of <i>p</i>(<i>p</i>)over-bar Collisions at √<i>s</i>=1.96 TeV
, PHYSICAL REVIEW LETTERS, Vol: 105, ISSN: 0031-9007- Cite
- Citations: 16
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Journal articleArgyriades J, Arnold R, Augier C, et al., 2010,
Measurement of the two neutrino double beta decay half-life of Zr-96 with the NEMO-3 detector
, NUCLEAR PHYSICS A, Vol: 847, Pages: 168-179, ISSN: 0375-9474 -
Journal articleSanchez PDA, Lees JP, Poireau V, et al., 2010,
Search for the rare decay <i>B</i> → <i>Kv</i>(<i>v</i>)over-bar
, PHYSICAL REVIEW D, Vol: 82, ISSN: 1550-7998- Cite
- Citations: 40
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Conference paperPasternak J, Jenner LJ, Kurup A, et al., 2010,
Accelerator and particle physics research for the next generation muon to electron conversion experiment - The PRISM task force
, Pages: 3473-3475The next generation of lepton flavour violation experiments will use high intensity and high quality muon beams. Such beams can be produced by sending a short proton pulse to the pion production target, capturing pions and performing RF phase rotation on the resulting muon beam in an FFAG ring, which was proposed for the PRISM project. A PRISM task force was created to address the accelerator and detector issues that need to be solved in order to realise the PRISM experiment. The parameters of the initial proton beam required and the PRISM experiment are reviewed. Alternative designs of the PRISM FFAG ring are presented and compared with the reference design. The ring injection/extraction system, matching with the solenoid channel and progress on the ring's main hardware systems like RF and kicker magnet are discussed. The progress and future directions of the study are presented in this paper.
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Conference paperSumner TJ, 2010,
ZEPLIN-III
ZEPLIN-III is a 12 kg two-phase xenon time projection chamber used to search for the weakly interacting massive particles (WIMPs) that may account for the dark matter of our Galaxy. The detector measures both scintillation and ionisation produced interactions in the liquid to differentiate between nuclear recoils expected from WIMPs and electron recoil background signals down to ∼10 keV nuclear recoil energy. This paper reviews the science results obtained from the frst science run and reports on the current status of the upgrade and second science run. The frst science run obtained 847kgdays of data acquired between February 27<sup>th</sup> 2008 and May 20<sup>th</sup> 2008 and excluded a WIMP-nucleon elastic scattering spin-independent cross-section above 8.1 × 10<sup>-8</sup>pb at 60 GeVc<sup>-2</sup> with a 90% confdence limit. ZEPLIN-III demonstrated better discrimination at low-energy than previously achieved by any other xenon-based experiments and highlighted a non-linearity in the low-energy response to nuclear recoils. The upgrade includes replacement of the PMT array and the addition of an active veto for gammas and neutrons. The second science run should offer an order of magnitude improvement in sensitivity. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.
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Conference paperHigaki H, Kuroda N, Imao H, et al., 2010,
A tank circuit monitoring a large number of antiprotons in Musashi
, Pages: 948-950For the production of low energy antiproton beams with the energy of 100 to 1000 eV, it is desirable to accumulate a larger number of antiprotons in a large Penning trap, where a tank circuit signal can be used as a nondestructive measurement of more than 10<sup>6</sup> antiprotons. This is similar to Schottky signals used to monitor beams in accelerators.
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Conference paperKuroda N, Enomoto Y, Higaki H, et al., 2010,
Development of MUSASHI, a Mono-energetic Ultra-Slow antiproton beam source
, Pages: 4188-4190The ASACUSA collaboration developed an ultraslow antiproton beam source, named MUSASHI, Mono-energetic Ultra-Slow Antiproton Source for High-precision Investigation, consisting an electromagnetic trap housed in an liquid He free superconducting solenoid and low energy antiproton beam transport line. The MUSASHI confined more than 1 × 10<sup>7</sup> of antiprotons and extracted them as ultra-slow antiproton beams with energy of 250 eV and various bunch lengths.
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Conference paperHori M, Hanke K, 2010,
A time-resolved sem monitor with large dynamic range
, Pages: 434-437CERN's Linac4 will provide 160-MeV H" beams of intensity N = 2 × 10<sup>14</sup> ions s<sup>-1</sup>. Before this beam can be injected into the existing CERN Proton Synchrotron Booster (PSB), a beam chopper must be used to remove some sequences of 0.5-ns-long micro-bunches from it. We developed a monitor to measure the time structure and spatial profile of the chopped beam, with respective resolutions Δt ∼ 1ns and Δx ∼ 2 mm. Its large active area 40 mm × 40 mm and dynamic range also allows investigations of beam halos. The beam was first allowed to strike a carbon foil, and the resulting secondary electrons were accelerated by sets of parallel grid electrodes. The electrons then struck a phosphor screen, and the scintillation light was guided to a thermoelectrically cooled, charge-coupled device camera. The sub-nanosecond time resolution was attained by applying high-voltage pulses to the grids. The monitor has been tested with 700-ps-long UV laser pulses, and a 3-MeV proton beam provided by a tandem.
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Conference paperMagnan AM, 2010,
Jets and heavy flavour at LHC with ATLAS and CMS
, Pages: 234-240The LHC experiments ATLAS and CMS plan to take advantage of large multi-jet samples with and without heavy flavour tagging and vector boson production to test QCD at the TeV scale. Initial multi-jet cross section measurements at LHC will demonstrate the understanding of the calibration of the detectors, the jet energy scale systematics and the trigger. Further in the LHC run, measurements of inclusive di-jet cross sections with heavy flavour tag, which provides the process hard scale, will probe QCD at scales never tested before. Jet production measurements with associated W and Z bosons provide a separate test of QCD in different and complementary channels. Measurements of these processes are essential to demonstrate the understanding of major backgrounds to Higgs and SUSY channels, such as those of top-quark production or W+jet/Z+jet.
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Journal articleHori M, Yonekura SI, Nohmi T, et al., 2010,
Error-prone translesion DNA synthesis by Escherichia coli DNA polymerase IV (DinB) on templates containing 1,2-dihydro-2-oxoadenine
, Journal of Nucleic Acids, Vol: 2010, ISSN: 2090-0201Escherichia coli DNA polymerase IV (Pol IV) is involved in bypass replication of damaged bases in DNA. Reactive oxygen species (ROS) are generated continuously during normal metabolism and as a result of exogenous stress such as ionizing radiation. ROS induce various kinds of base damage in DNA. It is important to examine whether Pol IV is able to bypass oxidatively damaged bases. In this study, recombinant Pol IV was incubated with oligonucleotides containing thymine glycol (dTg), 5-formyluracil (5-fodU), 5-hydroxymethyluracil (5-hmdU), 7,8-dihydro-8-oxoguanine (8-oxodG) and 1,2-dihydro-2-oxoadenine (2-oxodA). Primer extension assays revealed that Pol IV preferred to insert dATP opposite 5-fodU and 5-hmdU, while it inefficiently inserted nucleotides opposite dTg. Pol IV inserted dCTP and dATP opposite 8-oxodG, while the ability was low. It inserted dCTP more effectively than dTTP opposite 2-oxodA. Pol IV's ability to bypass these lesions decreased in the order: 2-oxodA > 5-fodU∼5-hmdU > 8-oxodG > dTg. The fact that Pol IV preferred to insert dCTP opposite 2-oxodA suggests the mutagenic potential of 2-oxodA leading to A:T→G:C transitions. Hydrogen peroxide caused an ∼2-fold increase in A:T→G:C mutations in E. coli, while the increase was significantly greater in E. coli overexpressing Pol IV. These results indicate that Pol IV may be involved in ROS-enhanced A:T→G:C mutations. © 2010 Masaki Hori et al.
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Conference paperAslaninejad M, Easton M, Pasternak J, et al., 2010,
Design of the MEBT for the PAMELA medical FFAG
, Pages: 3960-3962The PAMELA medical FFAG complex under design in the UK, aims to operate with both proton and carbon beams for hadron therapy. Medium energy beam transfer (MEBT) of PAMELA consists of the proton beam line coming out of the injector cyclotron, carbon beam transfer from the independent carbon 6+ injector Linac, switching dipole (SD) when both beam merge and transfer line toward the PAMELA NS-FFAG. The MEBT layout and design, which needs to incorporate the beam chopper for the intensity modulation, are discussed. The careful matching of optical functions between various components in the MEBT and beam dynamics simulations are presented.
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Conference paperAslaninejad M, Easton M, Pasternak J, et al., 2010,
Injection of proton and carbon 6+ into the non-scaling FFAG
, Pages: 3957-3959For the PAMELA medical non-scaling FFAG, carbon 6+ as well as proton particles are required. The general injection layout based on a cyclotron for proton and a Linac for carbon is considered. There are two options for pre-accelerating carbon ions for PAMELA, either accelerating carbon with the charge state 4+ from the ion source and stripping after the pre-accelerator or directly accelerating carbon 6+ ions all the way from the ion source. For both options solution has been investigated. Simulations of beam dynamics for both particle species are presented. The resulting schemes based on either the single turn or multi-turn injection into the first FFAG ring is discussed.
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Conference paperPasternak J, Scott Berg J, Aslaninejad M, et al., 2010,
Injection/extraction system of the muon FFAG for the Neutrino Factory
, Pages: 3476-3478Nonscaling FFAG is required for the muon acceleration in the Neutrino Factory, the baseline for which is under investigation in the International Design Study (IDS-NF). In order to inject/extract the muon beam with a very large emittance, several strong kickers with a very large aperture are required distributed in many lattice cells. Once sufficient orbit separation is obtained by the kickers, the final degree of separation from the lattice is made by the septum, which needs to be superconducting. The geometry of the symmetric solutions allowing to inject/extract both signs of muons is presented. The preliminary design of the kicker system is given.
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Conference paperEdgecock R, Kelliher D, Machida S, et al., 2010,
The EMMA non-scaling FFAG
, Pages: 4266-4268The Electron Model for Many Applications (EMMA) will be the World's first non-scaling FFAG and is under construction at the STFC Daresbury Laboratory in the UK. Construction is due for completion in Summer 2010 and will be followed by commissioning with beam and a detailed experimental programme to study the functioning of this type of accelerator. This paper will give an overview of the motivation for the project and describe the EMMA design and hardware. The first results from commissioning will be presented in a separate paper.
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Journal articleAslaninejad M, Bontoiu C, Pasternak J, et al., 2010,
Solenoid fringe field effects for the neutrino factory Linac - Mad-X investigation
, Ipac 2010 1st International Particle Accelerator Conference, Pages: 3963-3965International Design Study for the Neutrino Factory (IDS-NF) assumes the first stage of muon acceleration (up to 900 MeV) to be implemented with a solenoid based Linac. The Linac consists of three styles of cryo-modules, containing focusing solenoids and varying number of SRF cavities for acceleration. Fringe fields of the solenoids and the focusing effects in the SRF cavities have significant impact on the transverse beam dynamics. Using an analytical formula, the effects of fringe fields are studied in MAD-X. The resulting betatron functions are compared with the results of beam dynamics simulations using OptiM code.
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Journal articlePeach K, Cobb J, Sheehy SL, et al., 2010,
Pamela overview and status
, Ipac 2010 1st International Particle Accelerator Conference, Pages: 112-114The status of PAMELA (Particle Accelerator for MEdical Applications) - an accelerator for proton and light ion therapy using a non-scaling FFAG (ns-FFAG) accelerator - is reviewed and discussed.
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Journal articleSanchez PDA, Lees JP, Poireau V, et al., 2010,
Observation of new resonances decaying to <i>D</i>π and <i>D</i>*π in inclusive <i>e</i><SUP>+</SUP><i>e</i><SUP>-</SUP> collisions near √<i>s</i>=10.58 GeV
, PHYSICAL REVIEW D, Vol: 82, ISSN: 1550-7998- Cite
- Citations: 124
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Journal articleAbramowicz H, Abt I, Adamczyk L, et al., 2010,
Measurement of high-Q <SUP>2</SUP> charged current deep inelastic scattering cross sections with a longitudinally polarised positron beam at HERA
, EUROPEAN PHYSICAL JOURNAL C, Vol: 70, Pages: 945-963, ISSN: 1434-6044- Author Web Link
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- Citations: 29
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