ProfessorRichardThompson

Asprusten M, Worthington S, Thompson RC, 2014, Theory and simulation of ion Coulomb crystal formation in a Penning trap, Applied Physics B - Lasers and Optics, Vol: 114, Pages: 157-166, ISSN: 0946-2171

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Knoop M, Madsen N, Thompson RC, 2014, Physics with trapped charged particles: Lectures from the les houches winter school, ISBN: 9781783264049

This book is a collection of articles on Physics with Trapped Charged Particles by speakers at the Les Houches Winter School. The articles cover all types of physics with charged particles, and are aimed at introducing the basic issues at hand, as well as the latest developments in the field. It is appropriate for PhD students and early career researchers, or interested parties new to the area.

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• Citations: 2

Knoop M, Madsen N, Thompson RC, 2014, Physics with Trapped Charged Particles, Physics with Trapped Charged Particles, Editors: Knoop, Thompson, Madsen, Publisher: Imperial College Press, Pages: 1-24, ISBN: 9781783264049

This book is a collection of articles on Physics with Trapped Charged Particles by speakers at the Les Houches Winter School.

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Mavadia S, Goodwin JF, Stutter G, Bharadia S, Crick DR, Segal DM, Thompson RCet al., 2013, Control of the conformations of ion Coulomb crystals in a Penning trap, Nature Communications, Vol: 4, ISSN: 2041-1723

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Murboeck T, Albrecht S, Andelkovic Z, Cazan R, Hannen V, Joehren R, Vollbrecht J, Schmidt S, Segal D, Thompson R, Vogel M, Weinheimer C, Noertershaeuser W, Birkl Get al., 2013, SpecTrap: precision spectroscopy of highly charged ions-status and prospects, 16th International Conference on the Physics of Highly Charged Ions (HCI), Publisher: IOP PUBLISHING LTD, ISSN: 0031-8949

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• Citations: 3

Noertershaeuser W, Lochmann M, Joehren R, Geppert C, Andelkovic Z, Anielski D, Botermann B, Bussmann M, Dax A, Froemmgen N, Hammen M, Hannen V, Kuehl T, Litvinov YA, Volbrecht J, Stoehlker T, Thompson RC, Weinheimer C, Wen W, Will E, Winters D, Sanchez RMet al., 2013, First observation of the ground-state hyperfine transition in <SUP>209</SUP>Bi<SUP>80+</SUP>, 16th International Conference on the Physics of Highly Charged Ions (HCI), Publisher: IOP PUBLISHING LTD, ISSN: 0031-8949

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• Citations: 24

Andelkovic Z, Cazan R, Noertershaeuser W, Bharadia S, Segal DM, Thompson RC, Joehren R, Vollbrecht J, Hannen V, Vogel Met al., 2013, Laser cooling of externally produced Mg ions in a Penning trap for sympathetic cooling of highly charged ions, PHYSICAL REVIEW A, Vol: 87, ISSN: 1050-2947

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• Citations: 36

Hensinger WK, Segal DM, Thompson RC, 2012, Ion trapping, APPLIED PHYSICS B-LASERS AND OPTICS, Vol: 107, Pages: 881-881, ISSN: 0946-2171

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Segal DM, Vogel M, Thompson RC, Bharadia Set al., 2012, Dynamics of laser-cooled Ca+ ions in a Penning trap with a rotating wall, Applied Physics B: lasers and optics

We have performed systematic measurements of the dynamics of laser-cooled 40Ca+ ions confined in a Penning trap and driven by a rotating dipole field (‘rotating wall’). The trap used is a copy of the one used in the SPECTRAP experiment located at the HITRAP facility at GSI, Germany. The size and shape of the ion cloud has been monitored using a CCD camera to image the fluorescence light resulting from excitation by the cooling laser. We have varied the experimental conditions such as amplitude and frequency of the rotating wall drive as well as the trapping parameters. The rotating wall can be used for a radial compression of the ion cloud thus increasing the ion density in the trap. We have also observed plasma mode excitations in agreement with theoretical expectations. This work will allow us to define the optimum parameters for high compression of the ions as needed for precision spectroscopy of forbidden transitions.

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Crick DR, Donnellan S, Segal DM, Thompson RCet al., 2010, Magnetically induced electron shelving in a trapped Ca<SUP>+</SUP> ion, PHYSICAL REVIEW A, Vol: 81, ISSN: 1050-2947

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• Citations: 14

Crick DR, Donnellan S, Ananthamurthy S, Thompson RC, Segal DMet al., 2010, Fast shuttling of ions in a scalable Penning trap array, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 81, ISSN: 0034-6748

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• Citations: 11

Andjelkovic Z, Barth W, Birkl G, Blank I, Blaum K, Brantjes NPM, Bodewits E, Bräuning-Demian A, Church D, Dahl L, Götz S, Herfurth F, Hoekstra R, Kester O, Kluge HJ, Koszudowski S, Kozhuharov C, Maero G, Nörtershäuser W, Pfister J, Quint W, Ratzinger U, Schempp A, Segal D, Sokolov A, Stöhlker T, Thompson RC, Ullrich J, Varentsov V, Vogel M, Vorobjev G, Warczak A, Weidemüller M, Weinheimer C, Winters DFAet al., 2009, HITRAP-a facility for experiments on heavy highly charged ions and on antiprotons, ISSN: 1742-6588

HITRAP is a facility for very slow highly-charged heavy ions at GSI. HITRAP uses the GSI relativistic ion beams, the Experimental Storage Ring ESR for electron cooling and deceleration to 4 MeV/u, and consists of a combination of an interdigital H-mode (IH) structure with a radiofrequency quadrupole structure for further deceleration to 6 keV/u, and a Penning trap for accumulation and cooling to low temperatures. Finally, ion beams with low emittance will be delivered to a large variety of atomic and nuclear physics experiments. Presently, HITRAP is in the commissioning phase. The deceleration of heavy-ion beam from the ESR storage ring to an energy of 500 keV/u with the IH structure has been demonstrated and studied in detail. The commissioning of the RFQ structure and the cooler trap is ongoing.

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• Citations: 3

Thompson RC, Donnellan S, Crick DR, Segal DMet al., 2009, Applications of laser cooled ions in a Penning trap, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 42, ISSN: 0953-4075

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• Citations: 16

Thompson R, 2009, 'The Rydberg constant' (1974) by GW Series, CONTEMPORARY PHYSICS, Vol: 50, Pages: 129-129, ISSN: 0010-7514

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Thompson R, 2009, 'Measuring the quantum mechanical wave function' by MG Raymer (1997), CONTEMPORARY PHYSICS, Vol: 50, Pages: 321-321, ISSN: 0010-7514

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Retzker A, Thompson RC, Segal DM, Plenio MBet al., 2008, Double Well Potentials and Quantum Phase Transitions in Ion Traps, PHYSICAL REVIEW LETTERS, Vol: 101, ISSN: 0031-9007

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• Citations: 82

Phillips ES, Hendricks RJ, Abdulla AM, Ohadi H, Crick DR, Koo K, Segal DM, Thompson RCet al., 2008, Dynamics of axialized laser-cooled ions in a Penning trap, PHYSICAL REVIEW A, Vol: 78, ISSN: 1050-2947

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• Citations: 7

Crick DR, Ohadi H, Bhatti I, Thompson RC, Segal DMet al., 2008, Two-ion Coulomb crystals of Ca<SUP>+</SUP> in a Penning trap, OPTICS EXPRESS, Vol: 16, Pages: 2351-2362, ISSN: 1094-4087

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• Citations: 18

Hendricks RJ, Phillips ES, Segal DM, Thompson RCet al., 2008, Laser cooling in the Penning trap: an analytical model for cooling rates in the presence of an axializing field, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 41, ISSN: 0953-4075

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• Citations: 9

Kluge H-J, Beier T, Blaum K, Dahl L, Eliseev S, Herfurth F, Hofmann B, Kester O, Koszudowski S, Kozhuharov C, Maero G, Noertershaeuser W, Pfister J, Quint W, Ratzinger U, Schempp A, Schuch R, Stoehlker T, Thompson RC, Vogel M, Vorobjev G, Winters DFA, Werth Get al., 2008, HITRAP:: A facility at GSI for highly charged ions, Symposium in Honor of Ingvar Lindgrens 75th Birthday, Publisher: ELSEVIER ACADEMIC PRESS INC, Pages: 83-98, ISSN: 0065-3276

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• Citations: 106

Winters DFA, Vogel M, Segal DM, Thompson RC, Noertershaeuser Wet al., 2007, Laser spectroscopy of hyperfine structure in highly charged ions:: a test of QED at high fields, International Workshop on Precision Physics of Simple Atomic Systems, Publisher: CANADIAN SCIENCE PUBLISHING, Pages: 403-408, ISSN: 0008-4204

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• Citations: 17

Brownnutt M, Letchumanan V, Wilpers G, Thompson RC, Gill P, Sinclair AGet al., 2007, Controlled photoionization loading of <SUP>88</SUP>Sr<SUP>+</SUP> for precision ion-trap experiments, APPLIED PHYSICS B-LASERS AND OPTICS, Vol: 87, Pages: 411-415, ISSN: 0946-2171

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• Citations: 40

Castrejon-Pita JR, Ohadi H, Crick DR, Winters DFA, Segal DM, Thompson RCet al., 2007, Novel designs for Penning ion traps, JOURNAL OF MODERN OPTICS, Vol: 54, Pages: 1581-1594, ISSN: 0950-0340

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• Citations: 15

Earis A, Daley M, Fei S, Thompson RCet al., 2007, Acoustical Studies of Historical Keyboard Instruments in the Royal College of Music Museum of Instruments, 19th International Congress on Acoustics (ICA 2007), Publisher: Sociedad Espanola de Acustica, Pages: 1759-1764

Inharmonicity occurs in stiff strings where the frequencies of the individual partials do not correspond precisely to the expected integer multiples of the fundamental frequency. This ‘stretching’ of the harmonic frequencies increases with string stiffness, and can be measured by means of an inharmonicity coefficient, B. This paper investigates the effect of inharmonicity in the strings of three historical keyboard instruments in the Royal College of Music (RCM) Museum of Instruments, a Kirckman harpsichord (1773) and grand pianos by Broadwood (1799) and Bertsche (1821).For each instrument, the frequencies of the individual partials of each string were determined experimentally by recording and analysis using an algorithm employing the fast Fourier transform. The experimentally measured values of B were then compared with those calculated theoretically using the known physical parameters of the string. The theoretical and experimental data correlate well and any differences between the two can be attributed to the lack of reliable partial data for higher pitch strings. The value of B shows a systematic dependence on the date of construction with the more recent instruments having higher values. This behaviour can be related to developments in the structure of the instrument.

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Brownnutt M, Wilpers G, Gill P, Thompson RC, Sinclair AGet al., 2006, Monolithic microfabricated ion trap chip design for scaleable quantum processors, NEW JOURNAL OF PHYSICS, Vol: 8, ISSN: 1367-2630

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• Citations: 27

Winters DFA, Vogel M, Segal DM, Thompson RCet al., 2006, Electronic detection of charged particle effects in a Penning trap, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 39, Pages: 3131-3143, ISSN: 0953-4075

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• Citations: 20

Vogel M, Winters DFA, Segal DM, Thompson RCet al., 2005, Proposed precision laser spectrometer for trapped, highly charged ions, REVIEW OF SCIENTIFIC INSTRUMENTS, Vol: 76, ISSN: 0034-6748

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• Citations: 36

Castrejón-Pita JR, Thompson RC, 2005, Proposal for a planar Penning ion trap -: art. no. 013406, PHYSICAL REVIEW A, Vol: 72, ISSN: 2469-9926

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• Citations: 21

Winters DFA, Abdulla AM, Pita JRC, de Lange A, Segal DM, Thompson RCet al., 2005, Plans for laser spectroscopy of trapped cold hydrogen-like HCI, 12th International Conference on the Physics of Highly Charged Ions, Publisher: ELSEVIER, Pages: 201-205, ISSN: 0168-583X

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• Citations: 9

Vogel M, Winters DFA, Thompson RC, 2005, Mikrowellenspektroskopie: genauere Hyperfeinstruktur, Publisher: Physik Unserer Zeit Vol 4

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