Search

Your search keyword '"I. Kilvington"' showing total 12 results
Start Over Author "I. Kilvington"
12 results on '"I. Kilvington"'

1. New Measurement ofΣBeam Asymmetry forηMeson Photoproduction on the Proton

Author

V. G. Nedorezov, R. Di Salvo, C. Schaerf, R. Frascaria, D. Moricciani, L. Casano, E. Guinault, J. Ajaka, J. P. Bocquet, J. P. Didelez, E. Hourany, V. Kouznetsov, T. Russew, J. Van de Wiele, M. Taiuti, Alessandro Zucchiatti, P. Levi Sandri, P. Rossi, L. Ciciani, A. D'Angelo, D. Rebreyend, L. Nicoletti, B. Girolami, A. M. Lapik, M. Castoldi, G. Berrier, M. Anghinolfi, M. Morlet, M. L. Sperduto, F. Roudot, M. Sanzone, F. Renard, I. Kilvington, M. Breuer, V. Bellini, C. Perrin, G. Gervino, A. Turinge, A. Sudov, M. A. Duval, P. Corvisiero, L. H. Rosier, P. Girard, M. Ripani, C. Djalali, P. Hoffmann-Rothe, P. Calvat, F. Ghio, and Marco Capogni

Subjects
Physics, Particle physics, Photon, Proton, Meson, media_common.quotation_subject, Eta meson, General Physics and Astronomy, Sigma, Observable, Asymmetry, Nuclear physics, High Energy Physics::Experiment, Nuclear Experiment, Beam (structure), media_common
Abstract

We present new Sigma beam asymmetry data for eta meson photoproduction on the proton, using a novel tagged, laser backscattered, linearly polarized photon beam up to 1.1 GeV. The data show large, positive asymmetries, at all incident photon energies. In addition to the S-11(1535) and D-13(1520) resonances necessary to reproduce the cross sections, P-13(1720) and D-15(1675) "four stars" resonances contribute to the Sigma observable, but cannot reproduce the strong forward asymmetries measured at energies higher than 900 MeV.

Published
1998
Full Text
View/download PDF

2. Apparatus for measurement of the electric dipole moment of the neutron using a cohabiting atomic-mercury magnetometer

Author

J. M. Pendlebury, Y. Chibane, Philip Harris, J. D. Richardson, M. G. D. van der Grinten, S. N. Ivanov, Blayne Heckel, Steve K. Lamoreaux, P. Geltenbort, K. F. Smith, I. Kilvington, D. Shiers, D. J. R. May, M. Chouder, K. Green, C.A. Baker, and P. Iaydjiev

Subjects
Physics, Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Neutron magnetic moment, 010308 nuclear & particles physics, Magnetometer, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), QC0793, Magnetic detector, 01 natural sciences, Electron magnetic dipole moment, High Energy Physics - Experiment, Magnetic field, Computational physics, law.invention, Nuclear physics, Electric dipole moment, High Energy Physics - Experiment (hep-ex), law, 0103 physical sciences, Neutron, 010306 general physics, Spurious relationship, Instrumentation
Abstract

A description is presented of apparatus used to carry out an experimental search for an electric dipole moment of the neutron, at the Institut Laue-Langevin (ILL), Grenoble. The experiment incorporated a cohabiting atomic-mercury magnetometer in order to reduce spurious signals from magnetic field fluctuations. The result has been published in an earlier letter [1]; here, the methods and equipment used are discussed in detail.

Published
2014

3. COMPTON SCATTERING AND π+ PHOTO-PRODUCTION AT GRAAL

Author

Marco Capogni, Adriana D'Angelo, E. Hourany, V. Kuznetsov, A. Fantini, M. L. Sperduto, M. Guidal, I. Kilvington, M. Castoldi, C. Schaerf, N. V. Rudnev, V. Bellini, F. Ghio, Alessandro Zucchiatti, O. Bartalini, P. Levi Sandri, R. Kunne, B. Girolami, A. Turinge, R. Di Salvo, V. G. Nedorezov, Annick Lleres, A. D'Angelo, D. Rebreyend, J. P. Bocquet, D. Moricciani, L. Nicoletti, J. P. Didelez, A. M. Lapik, M. C. Sutera, and G. Gervino

Subjects
Physics, Angular range, Proton, Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Compton scattering, Electron, Nuclear physics, Pion, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, Beam (structure), Storage ring
Abstract

A polarized and tagged gamma ray beam is produced at GRAAL by the Compton scattering of laser light on the high energy electron circulating in the ESRF storage ring. We present results on the beam polarization asymmetries in the Compton Scattering and positive pion photo-production on proton target in the energy region 500-1500 MeV. These very precise results cover the angular range 30-150 degrees, providing stringent constraints to theoretical models.

Published
2002
Full Text
View/download PDF

4. MESON PHOTOPRODUCTION AT GRAAL

Author

M. L. Sperduto, M. Guidal, V. G. Nedorezov, Marco Capogni, F. Ghio, M. Castoldi, A. M. Lapik, E. Hourany, V. Kuznetsov, M. C. Sutera, F. Renard, N. V. Rudnev, D. Moricciani, G. Gervino, V. Bellini, Alessandro Zucchiatti, Adriana D'Angelo, A. D'Angelo, D. Rebreyend, C. Schaerf, Annick Lleres, J. P. Bocquet, R. Kunne, A. Fantini, I. Kilvington, P. Levi Sandri, A. Turinge, L. Nicoletti, J. P. Didelez, O. Bartalini, R. Di Salvo, and B. Girolami

Subjects
Physics, POSITIVE PION-PHOTOPRODUCTION, Particle physics, Range (particle radiation), Angular range, Meson, Proton, Nuclear Theory, Theoretical models, Gamma ray, RESONANCE, PROTON, ETA, SIGMA BEAM ASYMMETRY, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, Physics::Accelerator Physics, Nuclear Experiment, Beam (structure)
Abstract

At the GRAAL facility, a polarised and tagged gamma ray beam is produced in the energy range from 500 MeV up to 1500 MeV. Results of beam polarisation asymmetries and cross sections for the photoproduction of eta and pi(0) on the proton are presented. These very precise measurements cover the angular range 30 degrees-150 degrees, providing stringent constraints to theoretical models.

Published
2002

5. Meson photoproduction at GRAAL: preliminary results

Author

O. Bartalini, V. Bellini, J. P. Bocquet, M. Capogni, M. Castoldi, A. D’angelo, Annelisa d’Angelo, J. P. Didelez, R. Di Salvo, A. Fantini, G. Gervino, F. Ghio, B. Girolami, M. Guidal, E. Hourany, I. Kilvington, R. Kunne, V. Kuznetsov, A. Lapik, P. Levi Sandri, A. Lleres, D. Moricciani, V. Nedorezov, L. Nicoletti, D. Rebreyend, F. Renard, N. V. Rudnev, C. Schaerf, M. L. Sperduto, M. C. Sutera, A. Turinge, A. Zucchiatti, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), European Synchrotron Radiation Facility (ESRF), and GRAAL

Subjects
Particle physics, Angular range, Proton, Meson, Nuclear Theory, Theoretical models, General Physics and Astronomy, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], PROTON, 01 natural sciences, Polarised Gamma beam, Nuclear Baryon Resonance, Nuclear Physics, SIGMA-BEAM ASYMMETRY, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, 0103 physical sciences, BGO CALORIMETER, 010306 general physics, Nuclear Experiment, ELECTROPRODUCTION, RESONANCE, Physics, 010308 nuclear & particles physics, Pseudoscalar, Cover (topology), Physics::Accelerator Physics, High Energy Physics::Experiment, Beam (structure)
Abstract

A polarised and tagged \(\vec \gamma \) ray beam is produced at GRAAL with energies ranging from 500 MeV up to 1500 MeV. Results of beam polarisation asymmetries and cross sections for the photoproduction of pseudoscalar mesons on the proton are presented. These very precise measurements cover the angular range 30°–150°, providing stringent constraints to theoretical models.

Published
2001
Full Text
View/download PDF

6. Experiments with polarized photon beam at GRAAL

Author

M. Guidal, I. Kilvington, E. Hourany, V. G. Nedorezov, V. Bellini, M. A. Duval, M. Battaglieri, Y. Assafiri, E. Guinault, N. V. Rudnev, C. Gaulard, A. D'Angelo, J. Ajaka, M. Taiuti, M. Castoldi, D. Rebreyend, M. Ripani, L. Fichen, G. Gervino, J. P. Bocquet, Alessandro Zucchiatti, C. Schaerf, D. Moricciani, F. Ghio, M. Anghinolfi, R. Kunne, A. M. Lapik, V. Kouznetsov, F. Renard, P. Calvat, Qiang Zhao, Marco Capogni, A. Turinge, M. Sanzone, Annick Lleres, B. Girolami, P. Levi Sandri, L. Nicoletti, O. Bartalini, P. Corvisiero, R. Di Salvo, J. P. Didelez, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Hatanaka K. Nakano T., and GRAAL

Subjects
Meson, Nuclear Theory, Hadron, Synchrotron radiation, Elementary particle, 02 engineering and technology, PION-PHOTOPRODUCTION, PROTON, law.invention, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, Pion, ETA-PHOTOPRODUCTION, law, 0202 electrical engineering, electronic engineering, information engineering, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, Physics, ELECTROPRODUCTION, ASYMMETRY, MODEL, 020206 networking & telecommunications, Particle accelerator, Cathode ray, High Energy Physics::Experiment, 020201 artificial intelligence & image processing, Atomic physics, Storage ring
Abstract

Since 1996 the GRAAL experiment is running at the ESRF, using a linearly polarized photon beam produced by backscattering a laser beam on the electron beam in the storage ring. A liquid hydrogen target and a large acceptance detector are used. All sizeable photoproduction reactions are measured and analyzed. We present the results of η meson, one and two pions, and ω photoproduction, which are partly published or still preliminary. Predictions or fits of these data by theoretical models are given.

Published
2001

7. Results from the Graal experiment

Author

V. G. Nedorezov, M. Battaglieri, A. Jejcic, D. Moricciani, M. Castoldi, C. Gaulard, M. Guidal, F. Ghio, C. Schaerf, E. Hourany, M. Sanzone, F. Renard, B. Girolami, M. Taiuti, V. Bellini, J. P. Didelez, A. Turinge, J. P. Bocquet, N. V. Rudnev, V. Kouznetsov, C. M. Sutera, Alessandro Zucchiatti, Annick Lleres, A. M. Lapik, Marco Capogni, P. Corvisiero, I. Kilvington, M. Ripani, P. Levi Sandri, L. Nicoletti, A. D'Angelo, D. Rebreyend, M. Anghinolfi, O. Bartalini, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Faessler A., GRAAL, and bibliotheque, LPSC

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, PSEUDOSCALAR MESON PHOTOPRODUCTION, ETA-PHOTOPRODUCTION, SPIN OBSERVABLES, BGO CALORIMETER, PROTON, RESONANCES, ASYMMETRY, BEAM, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], 010308 nuclear & particles physics, 01 natural sciences, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Angular dependence, 010306 general physics
Abstract

The features of the Graal experiment at ESRF are presented, The obtained results are discussed and future developments outlined

Published
2000

8. Beam Asymmetry Σ in Meson Photoproduction at GRAAL

Author

F. Renard, J. Ajaka, V. Bellini, J. P. Bocquet, M. Breuer, M. Capogni, M. Castoldi, L. Ciciani, A. D’Angelo, J.-P. Didelez, R. Di Salvo, M. A. Duval, C. Gaulard, F. Ghio, B. Girolami, M. Guidai, E. Hourany, I. Kilvington, V. Kouznetsov, A. Lapik, P. Levi Sandri, A. Lleres, D. Moricciani, V. Nedorezov, L. Nicoletti, C. Perrin, D. Rebreyend, N. V. Rudnev, C. Schaerf, A. Turinge, and A. Zucchiatti

Published
1999
Full Text
View/download PDF

9. Beam polarisation asymmetries in meson photoproduction at graal

Author

M. A. Duval, N. V. Rudnev, Alessandro Zucchiatti, L. Ciciani, A. M. Lapik, M. Breuer, C. Schaerf, V. Kouznetsov, E. Hourany, F. Renard, I. Kilvington, V. G. Nedorezov, J. Ajaka, M. Castoldi, J. P. Bocquet, B. Girolami, F. Ghio, A. Turinge, Marco Capogni, V. Bellini, M. Guidal, C. Perrin, R. Di Salvo, Annick Lleres, C. Gaulard, A. D'Angelo, D. Rebreyend, D. Moricciani, P. Levi Sandri, L. Nicoletti, J. P. Didelez, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Robert, Suzanne

Subjects
Particle physics, Meson, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], Partial wave analysis, Nuclear Theory, PION-PHOTOPRODUCTION, 01 natural sciences, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, ETA-PHOTOPRODUCTION, 0103 physical sciences, BGO CALORIMETER, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Nuclear Experiment, 010306 general physics, Physics, 010308 nuclear & particles physics, RESONANCE REGION, SPIN OBSERVABLES, Stochastic matrix, Excited state, High Energy Physics::Experiment, Ground state, Nucleon, Beam (structure)
Abstract

Meson photoproduction on the nucleon has been a major source of information on the N and Δ resonances and the transition matrix elements from the nucleon ground state to its excited states.

Published
1999

10. Operation of a superthermal ultra-cold neutron source and the storage of ultra-cold neutrons in superfluid Helium4

Author

C. Jewell, W. Mampe, Robert Golub, B. Heckel, I. Kilvington, and P. Ageron

Subjects
Condensed Matter::Quantum Gases, Physics, Phonon, Scattering, Condensed Matter Physics, Roton, Electronic, Optical and Magnetic Materials, Superfluidity, Nuclear physics, Cross section (physics), Neutron source, General Materials Science, Neutron, Atomic physics, Nuclear Experiment, Superfluid helium-4
Abstract

We report the first successful operation of a superthermal UCN source and the observation of the storage of Ultra-Cold Neutrons in superfluid Helium4 at Temperatures in the range 0.5–1.15K. From the observations we obtain the total cross section for UCN scattering by superfluid Helium. The temperature dependence of the total cross section is found to be consistent with calculations which include the effects of phonon absorption and phonon and roton scattering.

Published
1983
Full Text
View/download PDF

11. Effect of a.c. amplitude on the measurement of electron energy distribution functions

Author

J D Swift, R P Jones, and A I Kilvington

Subjects
symbols.namesake, Glow discharge, Distribution function, Amplitude, Chemistry, Torr, symbols, Langmuir probe, General Medicine, Electron, Atomic physics, Current (fluid), Signal
Abstract

The energy distribution function of the electrons in the positive column of a glow discharge containing spectroscopically pure nitrogen at a pressure of 0.1 torr has been determined. This involved the measurement of the second-harmonic component of the current in a Langmuir probe circuit when an a.c. signal is superimposed on the d.c. bias applied to the probe. The effect on the apparent form of the electron energy distribution function of varying the amplitude of the a.c. signal is discussed and it is shown that the use of amplitudes exceeding 0.1 v can result in serious errors.

Published
1967
Full Text
View/download PDF

12. Beam asymmetry Σ in meson photo-production at GRAAL

Author

V. G. Nedorezov, M. A. Duval, Marco Capogni, M. Guidal, J. P. Didelez, M. Castoldi, Annick Lleres, I. Kilvington, D. Moricciani, B. Girolami, V. Bellini, A. M. Lapik, R. Di Salvo, J. Ajaka, P. Levi Sandri, J. P. Bocquet, A. D'Angelo, D. Rebreyend, L. Nicoletti, A. Turinge, Alessandro Zucchiatti, F. Renard, C. Perrin, C. Gaulard, F. Ghio, V. Kouznetsov, C. Schaerf, and E. Hourany

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, media_common.quotation_subject, Nuclear Theory, Resonance, Interference (wave propagation), Asymmetry, Settore FIS/04 - Fisica Nucleare e Subnucleare, Nuclear physics, Pion, High Energy Physics::Experiment, Nuclear Experiment, Multipole expansion, Nucleon, Beam (structure), media_common
Abstract

Meson photoproduction on the nucleon is a major tool for the investigation of nucleon resonances. In particular eta photoproduction selectively probes certain resonances which are difficult to explore with pions. The low energy behaviour of the eta production is dominated by the S 11 (1535) resonance and the influence of other resonances (like D 13(1520)) is difficult to detect. Polarization observables enhance the sensitivity to the contributions of the less pronounced resonances since they depend mostly on the interference between the dominant E 0+ multipole and the smaller ones (like E 2- + M 2- for the D 13(1520))[l].

Catalog

Books, media, physical & digital resources
See catalog results