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1. Production of Highly Polarized Positrons Using Polarized Electrons at MeV Energies

Author

Sadiq Setiniyaz, G. Bosson, D. Abbott, M. Ungaro, J. S. Real, A. Camsonne, C. Cuevas, Adeleke Hakeem Adeyemi, T. A. Forest, E. Forman, H. Dong, Riad Suleiman, P. Aguilera, R. Kazimi, Yiyang Zhang, Y. Kim, Y. Wang, M. Poelker, Joseph Grames, T. Michaelides, J. L. McCarter, D. McNulty, P. Harrell, S. Golge, M. Marton, Marcy Stutzman, B. Moffit, Chris Tennant, E. Fanchini, L. Richardson, J. R. Hoskins, K. Mahoney, D. Machie, Dennis Turner, E. Froidefond, M D Muhd Ali, Brian P. Josey, P. Gueye, M. Mchugh, M. Baylac, D. S. Dale, L. S. Cardman, Alessandro Variola, C.-Y. Tsai, P. L. Cole, R. Michaels, C. Munoz Camacho, Brian E. Cade, C. E. Hyde, A. P. Freyberger, D. Moser, H. Areti, Jean-François Muraz, R. Mammei, A. Opper, Philip Adderley, Jay Benesch, J. Dumas, M. McCaughan, O. Dadoun, J. Clark, K. E. Mesick, E. Voutier, S. Covert, J. Hansknecht, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de l'Accélérateur Linéaire (LAL), 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), Institut de Physique Nucléaire d'Orsay (IPNO), and Peppo Collaboration

Subjects
Accelerator Physics (physics.acc-ph), Positron beam, Astrophysics::High Energy Astrophysical Phenomena, [PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph], FOS: Physical sciences, General Physics and Astronomy, Electron, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, law.invention, Nuclear physics, High Energy Physics - Experiment (hep-ex), Positron, Electron beam accelerator, law, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Bremsstrahlung, Particle accelerator, Polarization (waves), 3. Good health, Cathode ray, Physics::Accelerator Physics, Physics - Accelerator Physics, High Energy Physics::Experiment, Atomic physics
Abstract

The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the polarized bremsstrahlung radiation induced by a polarized electron beam in a high-$Z$ target. Positron polarization up to 82\% have been measured for an initial electron beam momentum of 8.19~MeV/$c$, limited only by the electron beam polarization. This technique extends polarized positron capabilities from GeV to MeV electron beams, and opens access to polarized positron beam physics to a wide community., Comment: 5 pages, 4 figures

Published
2016
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2. GEp/GMpRatio by Polarization Transfer ine→p→ep→

Author

M. K. Jones, K. A. Aniol, F. T. Baker, J. Berthot, P. Y. Bertin, W. Bertozzi, A. Besson, L. Bimbot, W. U. Boeglin, E. J. Brash, D. Brown, J. R. Calarco, L. S. Cardman, C.-C. Chang, J.-P. Chen, E. Chudakov, S. Churchwell, E. Cisbani, D. S. Dale, R. De Leo, A. Deur, B. Diederich, J. J. Domingo, M. B. Epstein, L. A. Ewell, K. G. Fissum, A. Fleck, H. Fonvieille, S. Frullani, J. Gao, F. Garibaldi, A. Gasparian, G. Gerstner, S. Gilad, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, V. Gorbenko, A. Green, J.-O. Hansen, C. R. Howell, G. M. Huber, M. Iodice, C. W. de Jager, S. Jaminion, X. Jiang, W. Kahl, J. J. Kelly, M. Khayat, L. H. Kramer, G. Kumbartzki, M. Kuss, E. Lakuriki, G. Lavessière, J. J. LeRose, M. Liang, R. A. Lindgren, N. Liyanage, G. J. Lolos, R. Macri, R. Madey, S. Malov, D. J. Margaziotis, P. Markowitz, K. McCormick, J. I. McIntyre, R. L. J. van der Meer, R. Michaels, B. D. Milbrath, J. Y. Mougey, S. K. Nanda, E. A. J. M. Offermann, Z. Papandreou, C. F. Perdrisat, G. G. Petratos, N. M. Piskunov, R. I. Pomatsalyuk, D. L. Prout, V. Punjabi, G. Quéméner, R. D. Ransome, B. A. Raue, Y. Roblin, R. Roche, G. Rutledge, P. M. Rutt, A. Saha, T. Saito, A. J. Sarty, T. P. Smith, P. Sorokin, S. Strauch, R. Suleiman, K. Takahashi, J. A. Templon, L. Todor, P. E. Ulmer, G. M. Urciuoli, P. Vernin, B. Vlahovic, H. Voskanyan, K. Wijesooriya, B. B. Wojtsekhowski, R. J. Woo, F. Xiong, G. D. Zainea, and Z.-L. Zhou

Subjects
Elastic scattering, Physics, Proton, 010308 nuclear & particles physics, Proton magnetic moment, General Physics and Astronomy, Electron, Polarization (waves), 01 natural sciences, Charged particle, Nuclear physics, Magnetization, 0103 physical sciences, Magnetic form factor, Physics::Accelerator Physics, Atomic physics, Nuclear Experiment, 010306 general physics
Abstract

The ratio of the proton's elastic electromagnetic form factors was obtained by measuring the transverse and longitudinal polarizations of recoiling protons from the elastic scattering of polarized electrons with unpolarized protons. The ratio of the electric to magnetic form factor is proportional to the ratio of the transverse to longitudinal recoil polarizations. The ratio was measured over a range of four-momentum transfer squared between 0.5 and 3.5 GeV-squared. Simultaneous measurement of transverse and longitudinal polarizations in a polarimeter provides good control of the systematic uncertainty. The results for the ratio of the proton's electric to magnetic form factors show a systematic decrease with increasing four momentum squared, indicating for the first time a marked difference in the spatial distribution of charge and magnetization currents in the proton.

Published
2000
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3. Publisher's Note: Proton elastic form factor ratios toQ2=3.5GeV2by polarization transfer [Phys. Rev. C 71, 055202 (2005)]

Author

R. J. Woo, Justin I. McIntyre, K. Wijesooriya, M. Khayat, P.Y. Bertin, C. F. Perdrisat, E. A. J. M. Offermann, Riad Suleiman, Y. Roblin, X. Jiang, A. Gasparian, R. A. Lindgren, J. J. LeRose, L. S. Cardman, J. Berthot, S. Malov, P. Vernin, J. A. Templon, L. Bimbot, V. Gorbenko, B. Diederich, D. S. Brown, Bogdan Wojtsekhowski, L. Todor, S. K. Nanda, S. Churchwell, Z. L. Zhou, Richard Madey, M. K. Jones, N. M. Piskunov, Shalev Gilad, E. Chudakov, K. A. Aniol, D. S. Dale, H. Voskanyan, Nilanga Liyanage, Brian Raue, G. M. Huber, F. Garibaldi, T. Saito, George Dan Zainea, G. G. Petratos, M. Kuss, Laird Kramer, A. V. Glamazdin, Z. Chai, G. Rutledge, David L. Prout, G. J. Kumbartzki, E. Lakuriki, G. J. Lolos, M. B. Epstein, G. Laveissière, B. D. Milbrath, C. Glashausser, Mauro Iodice, Lubomir Pentchev, S. Frullani, J. Y. Mougey, R. Roche, R. Michaels, A. Deur, R. L. Meer, A. J. Sarty, J. P. Chen, C. W. Jager, M. Liang, G. Quéméner, Branislav Vlahovic, H. Fonvieille, Andre Fleck, G. M. Urciuoli, C. R. Howell, J. R. Calarco, C. C. Chang, E. J. Brash, A. Green, D. J. Margaziotis, William Bertozzi, T. Smith, Ronald Gilman, J. Gao, R. I. Pomatsalyuk, Pavel Sorokin, Pete Markowitz, P. E. Ulmer, Kevin Fissum, W. Kahl, R. De Leo, K. McCormick, W.U. Boeglin, S. Strauch, G. M. Gerstner, J.-O. Hansen, Z. Papandreou, A. Besson, P. M. Rutt, Ronald Ransome, J. Domingo, F. Xiong, A. Saha, S. Jaminion, E. Cisbani, F. T. Baker, V. A. Punjabi, Jonatan Piedra Gomez, R. Macri, James J. Kelly, L. A. Ewell, and K. Takahashi

Subjects
Physics, Elastic scattering, Nuclear physics, Nuclear and High Energy Physics, Particle physics, Proton, 010308 nuclear & particles physics, 0103 physical sciences, 010306 general physics, Polarization (waves), 01 natural sciences, Typographical error
Abstract

This paper was published online on 20 May 2005 without several of the authors' corrections incorporated. Equation (13) has been replaced. The captions of Figs. 16--18 have also been replaced. Typographical errors on pages 4, 6, 14, 15, 18, 19, 22, and 24 have all been corrected. The paper has been corrected as of 8 June 2005. The text is correct in the printed version of the journal.

Published
2005
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4. The Science and Experimental Equipment for the 12 GeV Upgrade of CEBAF

Author

Jean Laget, Xiangdong Ji, David Richards, R. J. Holt, D. J. Mack, Sabine Jeschonnek, P. E. Reimer, Paul Ulmer, Bogdan Wojtsekhowski, Haiyan Gao, Paul Souder, John Arrington, H. Fenker, Jian-Ping Chen, Mark Jones, Paul Stoler, Wolodymyr Melnitchouk, C. A. Meyer, Carlos Salgado, Volker Burker, Anthony W. Thomas, A. R. Dzierba, Latifa Elouadrhiri, Carl E. Carlson, Elton Smith, Anatoly Radyushkin, Mike Ramsey-Musolf, Gordon D. Cates, K. S. Kumar, Rocco Schiavilla, Xiangdong Jiang, S. E. Kuhn, Charles Hyde, Zein-Eddine Meziani, Cornelis De Jager, Larry Weinstein, L. S. Cardman, Christian Weiss, Oscar Rondon-Aramayo, Cynthia Keppel, Rolf Ent, Aron M. Bernstein, Douglas Higinbotham, Jose L. Goity, William Brooks, and Ashot Gasparian

Subjects
Nuclear physics, Physics, Chiral symmetry, Upgrade, Electron beam accelerator, Conceptual design, Physics::Accelerator Physics, High Energy Physics::Experiment, Nuclear Experiment
Abstract

This Conceptual Design Report (CDR) presents the compelling scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab to 12 GeV. Such a facility will make profound contributions to the study of hadronic matter.

Published
2005
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5. Dynamics of the quasielasticO16(e,e′p)reaction atQ2≈0.8(GeV∕c)2

Author

A. V. Glamazdin, E. A.J.M. Offermann, Seigo Kato, D. M. Manley, H. Fonvieille, R. Roche, S. Malov, P.Y. Bertin, E. Burtin, M. Holtrop, J. Gomez, Jing Zhao, Nilanga Liyanage, R. W. Lourie, R. Michaels, S. Jaminion, R. Holmes, T. Terasawa, Vincent Breton, D. J. Margaziotis, Branislav Vlahovic, H. Voskanyan, C. Jutier, W. Kahl, F. T. Baker, C. F. Perdrisat, Leonid Levchuk, J. M. Finn, R. I. Pomatsalyuk, V. A. Punjabi, K. Joo, David L. Prout, Olivier Ravel, H. Ueno, Bogdan Wojtsekhowski, K. McCormick, P. Vernin, P. E. Ulmer, S. K. Nanda, S. Kerhoas, J. Y. Mougey, L. B. Auerbach, A. Leone, T. Pussieux, L. S. Cardman, Y. Roblin, S. van Verst, R. A. Lindgren, J. J. LeRose, G. M. Huber, Z. Papandreou, J. A. Templon, F. Garibaldi, T. Saito, M. Khayat, Dimitri Debruyne, P. M. Rutt, V. Gorbenko, B. Frois, Kevin Fissum, D. Neyret, G. G. Petratos, A. Saha, Z. E. Meziani, B. Diederich, C. E. Hyde-Wright, G. Rutledge, L. Bimbot, James J. Kelly, K. Kino, M. Liang, Wolfgang Korsch, J. S. McCarthy, T. P. Smith, G. Quéméner, S. Platchkov, Mauro Iodice, Kazushige Maeda, L. Todor, K. Wijesooriya, Justin I. McIntyre, J. W. Watson, Larry Weinstein, J. Martino, C. R. Howell, Hiroaki Tsubota, J. P. Chen, J. R. Calarco, N. d'Hose, Jan Ryckebusch, Z. L. Zhou, G. M. Urciuoli, D. G. Zainea, Ronald Gilman, Ronald Ransome, R. L.J. van der Meer, C. C. Chang, D. Rowntree, K. S. Kumar, J. Gao, B. D. Anderson, G. J. Lolos, M. B. Epstein, Pavel Sorokin, Laird Kramer, G. J. Kumbartzki, G. Laveissière, M. K. Jones, A. Gasparian, R. Madey, William Bertozzi, W. U. Boeglin, Pete Markowitz, D. S. Dale, M. Khandaker, V. Zeps, Roberto Perrino, R. De Leo, E. Cisbani, J. Berthot, S. Frullani, H. Breuer, E. J. Brash, J. R. Vignote, T. P. Gorringe, J. M. Udías, F. W. Hersman, L. A. Ewell, J. Domingo, Gordon D. Cates, Paul Souder, A. Serdarevic-Offermann, A. Deur, C. Cavata, A. Soldi, J.E. Ducret, A. J. Sarty, P. Djawotho, C. Glashausser, R. Suleiman, Shalev Gilad, C. W. de Jager, and K. A. Aniol

Subjects
Physics, Nuclear and High Energy Physics, Proton, 010308 nuclear & particles physics, media_common.quotation_subject, Two-body problem, 01 natural sciences, Asymmetry, Eikonal approximation, Nuclear physics, Classical mechanics, 0103 physical sciences, Isobar, 010306 general physics, Relativistic quantum chemistry, Glauber, Oxygen-16, media_common
Abstract

The physics program in Hall A at Jefferson Lab commenced in the summer of 1997 with a detailed investigation of the ^(16)O(e,e′p) reaction in quasielastic, constant (q,ω) kinematics at Q^2≈0.8(GeV/c)^2, q≈1GeV/c, and ω≈445MeV. Use of a self-calibrating, self-normalizing, thin-film waterfall target enabled a systematically rigorous measurement. Five-fold differential cross-section data for the removal of protons from the 1p-shell have been obtained for 0

Published
2004
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6. Measurement of the Generalized Polarizabilities of the Proton in Virtual Compton Scattering atQ2=0.92and1.76 GeV2

Author

G. Laveissière, L. Todor, N. Degrande, S. Jaminion, C. Jutier, R. Di Salvo, L. Van Hoorebeke, L. C. Alexa, B. D. Anderson, K. A. Aniol, K. Arundell, G. Audit, L. Auerbach, F. T. Baker, M. Baylac, J. Berthot, P. Y. Bertin, W. Bertozzi, L. Bimbot, W. U. Boeglin, E. J. Brash, V. Breton, H. Breuer, E. Burtin, J. R. Calarco, L. S. Cardman, C. Cavata, C.-C. Chang, J.-P. Chen, E. Chudakov, E. Cisbani, D. S. Dale, C. W. de Jager, R. De Leo, A. Deur, N. d'Hose, G. E. Dodge, J. J. Domingo, L. Elouadrhiri, M. B. Epstein, L. A. Ewell, J. M. Finn, K. G. Fissum, H. Fonvieille, G. Fournier, B. Frois, S. Frullani, C. Furget, H. Gao, J. Gao, F. Garibaldi, A. Gasparian, S. Gilad, R. Gilman, A. Glamazdin, C. Glashausser, J. Gomez, V. Gorbenko, P. Grenier, P. A. M. Guichon, J. O. Hansen, R. Holmes, M. Holtrop, C. Howell, G. M. Huber, C. E. Hyde-Wright, S. Incerti, M. Iodice, J. Jardillier, M. K. Jones, W. Kahl, S. Kato, A. T. Katramatou, J. J. Kelly, S. Kerhoas, A. Ketikyan, M. Khayat, K. Kino, S. Kox, L. H. Kramer, K. S. Kumar, G. Kumbartzki, M. Kuss, A. Leone, J. J. LeRose, M. Liang, R. A. Lindgren, N. Liyanage, G. J. Lolos, R. W. Lourie, R. Madey, K. Maeda, S. Malov, D. M. Manley, C. Marchand, D. Marchand, D. J. Margaziotis, P. Markowitz, J. Marroncle, J. Martino, K. McCormick, J. McIntyre, S. Mehrabyan, F. Merchez, Z. E. Meziani, R. Michaels, G. W. Miller, J. Y. Mougey, S. K. Nanda, D. Neyret, E. A. J. M. Offermann, Z. Papandreou, B. Pasquini, C. F. Perdrisat, R. Perrino, G. G. Petratos, S. Platchkov, R. Pomatsalyuk, D. L. Prout, V. A. Punjabi, T. Pussieux, G. Quémenér, R. D. Ransome, O. Ravel, J. S. Real, F. Renard, Y. Roblin, D. Rowntree, G. Rutledge, P. M. Rutt, A. Saha, T. Saito, A. J. Sarty, A. Serdarevic, T. Smith, G. Smirnov, K. Soldi, P. Sorokin, P. A. Souder, R. Suleiman, J. A. Templon, T. Terasawa, R. Tieulent, E. Tomasi-Gustaffson, H. Tsubota, H. Ueno, P. E. Ulmer, G. M. Urciuoli, M. Vanderhaeghen, R. Van De Vyver, R. L. J. Van der Meer, P. Vernin, B. Vlahovic, H. Voskanyan, E. Voutier, J. W. Watson, L. B. Weinstein, K. Wijesooriya, R. Wilson, B. B. Wojtsekhowski, D. G. Zainea, W-M. Zhang, J. Zhao, and Z.-L. Zhou

Subjects
Physics, Proton, 010308 nuclear & particles physics, Scattering, Momentum transfer, Compton scattering, General Physics and Astronomy, 01 natural sciences, 7. Clean energy, Nuclear physics, Paramagnetism, Dipole, Pion, Polarizability, 0103 physical sciences, Atomic physics, 010306 general physics
Abstract

We report a virtual Compton scattering study of the proton at low c.m. energies. We have determined the structure functions P(LL)-P(TT)/epsilon and P(LT), and the electric and magnetic generalized polarizabilities (GPs) alpha(E)(Q2) and beta(M)(Q2) at momentum transfer Q(2)=0.92 and 1.76 GeV2. The electric GP shows a strong falloff with Q2, and its global behavior does not follow a simple dipole form. The magnetic GP shows a rise and then a falloff; this can be interpreted as the dominance of a long-distance diamagnetic pion cloud at low Q2, compensated at higher Q2 by a paramagnetic contribution from piN intermediate states.

Published
2004
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7. Backward electroproduction ofπ0mesons on protons in the region of nucleon resonances at four momentum transfer squaredQ2=1.0GeV2

Author

P.Y. Bertin, M. K. Jones, B. D. Anderson, G. J. Lolos, M. B. Epstein, S. Frullani, R. W. Lourie, Jing Zhao, W. Kahl, M. Kuss, J. W. Watson, Y. Roblin, Bogdan Wojtsekhowski, William Bertozzi, L. S. Cardman, D. Neyret, S. Jaminion, R. Michaels, S. Platchkov, F. T. Baker, H. Ueno, Pete Markowitz, R. Di Salvo, T. Terasawa, Vincent Breton, M. Khayat, J. Martino, Raphael Noel Tieulent, Sebastien Incerti, A. Saha, L. B. Auerbach, E. J. Brash, G. E. Dodge, V. A. Punjabi, R. A. Lindgren, Richard Madey, G. J. Kumbartzki, G. Laveissière, Z. Papandreou, J. J. LeRose, P. M. Rutt, O. Ravel, Roberto Perrino, R. De Leo, D. J. Margaziotis, J. A. Templon, Ronald Ransome, D. Rowntree, M. Baylac, J. P. Chen, A. Deur, P. Vernin, B. Frois, G. G. Petratos, Z. E. Meziani, K. Kino, E. Chudakov, J. O. Hansen, Justin I. McIntyre, R. I. Pomatsalyuk, K. Wijesooriya, Hiroaki Tsubota, A. Ketikyan, Z. L. Zhou, K. Soldi, A. Serdarevic, L. Bimbot, H. Breuer, M. Liang, R. Van de Vyver, G. M. Urciuoli, A. T. Katramatou, L. C. Alexa, G. Quéméner, V. Gorbenko, F. Renard, N. d'Hose, S. K. Nanda, S. Malov, E. Burtin, J. Domingo, C. R. Howell, J. R. Calarco, J. M. Finn, S. Kerhoas, M. Holtrop, J. Gomez, Thomas E. Smith, C. F. Perdrisat, C. Glashausser, E. Cisbani, W. U. Boeglin, Philippe Grenier, Latifa Elouadrhiri, G. Audit, A. Gasparian, C. E. Hyde-Wright, L. Todor, A. Leone, L. Tiator, S. Mehrabyan, L. A. Ewell, Kazushige Maeda, C. Furget, D. M. Manley, Kevin Fissum, D. G. Zainea, J. Jardillier, J. Gao, K. Arundell, R. Holmes, G. Rutledge, C. C. Chang, L. Van Hoorebeke, K. S. Kumar, Ronald Gilman, K. McCormick, Mauro Iodice, Nilanga Liyanage, H. Fonvieille, Pierre A.M. Guichon, Pavel Sorokin, Larry Weinstein, P. E. Ulmer, Paul Souder, A. V. Glamazdin, Haiyan Gao, R. L.J. van der Meer, S. Kox, G. M. Huber, F. Garibaldi, T. Saito, Richard Wilson, Laird Kramer, J. Y. Mougey, E. Voutier, Branislav Vlahovic, F. Merchez, G. Fournier, James J. Kelly, C. Marchand, Seigo Kato, G. W. Miller, H. Voskanyan, C. Jutier, David L. Prout, T. Pussieux, W. M. Zhang, J. Berthot, R. Suleiman, C. Cavata, S.S. Kamalov, G. Smirnov, A. J. Sarty, Shalev Gilad, C. W. de Jager, K. A. Aniol, E. A.J.M. Offermann, N. Degrande, J. Marroncle, D. Marchand, E. Tomasi-Gustaffson, J. S. Real, and D. S. Dale

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Nuclear Theory, Hadron, Momentum transfer, Sigma, 01 natural sciences, Nuclear physics, Baryon, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon, Lepton
Abstract

Exclusive electroproduction of pi{sup 0} mesons on protons in the backward hemisphere has been studied at Q2 = 1.0 GeV2 by detecting protons in the forward direction in coincidence with scattered electrons from the 4 GeV electron beam in Jefferson Lab's Hall A. The data span the range of the total (gamma*p) center-of-mass energy W from the pion production threshold to W = 2.0 GeV. The differential cross sections sigma{sub T} + epsilon sigma{sub L}, sigma{sub TL}, and sigma{sub TT} were separated from the azimuthal distribution and are presented together with the MAID and SAID parameterizations.

Published
2004
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8. Plane-wave impulse approximation extraction of the neutron magnetic form factor from quasielastic3He→(e→,e′)atQ2=0.3to0.6(GeV/c)2

Author

G. G. Petratos, Z. E. Meziani, J. M. Finn, A. Saha, W. Xu, J. P. Chen, D. Pripstein, J. S. Jensen, C. E. Jones, K. McCormick, Dipangkar Dutta, C. R. Howell, P. Żołnierczuk, S. Churchwell, A. Kievsky, R. I. Pomatsalyuk, J. R. Calarco, Ronald Ransome, G. S. Corrado, T. Black, Sebastien Incerti, K. Kramer, E. Chudakov, Emanuele Pace, R. Holmes, John C. Mitchell, T.W. Donnelly, D. S. Dale, M. K. Jones, Gordon D. Cates, K. McIlhany, E. Lakuriqi, T. Averett, M. Liang, J. O. Hansen, G. J. Kumbartzki, B. D. Anderson, Jacek Golak, Bogdan Wojtsekhowski, W. Glöckle, F. W. Hersman, S. Strauch, P. Djawotho, E. W. Hughes, D. W. Higinbotham, B. Humensky, Haiyan Gao, D. J. Margaziotis, C. F. Williamson, L. Auberbach, C. Glashausser, Karl Slifer, M. Sutter, J. Yeh, M. Viviani, Wolfgang Korsch, S. K. Nanda, M. Kuss, I. K. Kominis, C. W. de Jager, B. Tipton, William Bertozzi, F. Xiong, C. Crawford, J. W. Watson, Nilanga Liyanage, A. Deur, Hiroyuki Kamada, R. D. McKeown, R. Michaels, G. Salme, Y. Roblin, Branislav Vlahovic, Seonho Choi, L. S. Cardman, R. Suleiman, R. Kahl, L. Todor, S. Malov, J. Gomez, M. Schnee, J. W. Martin, Henryk Witała, Ronald Gilman, Paul Souder, T. Pavlin, G. W. Miller, David L. Prout, X. Jiang, M. Rvachev, T. Shin, A. V. Glamazdin, Z. Chai, J. J. LeRose, and V. Gorbenko

Subjects
Physics, Nuclear physics, Nuclear reaction, Nuclear and High Energy Physics, Quasielastic scattering, Scattering, Magnetic form factor, Hadron, Momentum transfer, Neutron, Nuclear Experiment, Nucleon
Abstract

A high precision measurement of the transverse spin-dependent asymmetry A_T' in ^3He(e,e') quasielastic scattering was performed in Hall A at Jefferson Lab at values of the squared four-momentum transfer, Q^2, between 0.1 and 0.6 (GeV/c)^2. A_(T') is sensitive to the neutron magnetic form factor, G_M^n . Values of G_M^n at Q^2 = 0.1 and 0.2 (GeV/c)^2, extracted using Faddeev calculations, were reported previously. Here, we report the extraction of G_M^n for the remaining Q^2 values in the range from 0.3 to 0.6 (GeV/c)^2 using a plane-wave impulse approximation calculation. The results are in good agreement with recent precision data from experiments using a deuterium target.

Published
2003
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9. 5 MeV Mott polarimeter development at Jefferson Lab

Author

K. A. Assamagan, J. Hansknecht, B. M. Poelker, J. S. Price, D. J. Mack, J. Grames, L. S. Cardman, C. K. Sinclair, and P. Piot

Subjects
Physics, Physics::Instrumentation and Detectors, Scattering, business.industry, Polarimetry, Polarimeter, Particle accelerator, Electron, Injector, Mott scattering, Polarization (waves), law.invention, Nuclear physics, Optics, law, Physics::Accelerator Physics, Nuclear Experiment, business
Abstract

Low energy (Ek=100 keV) Mott scattering polarimeters are ill-suited to support operations foreseen for the polarized electron injector at Jefferson Lab. One solution is to measure the polarization at 5 MeV where multiple and plural scattering are unimportant and precision beam monitoring is straightforward. The higher injector beam current offsets the lower cross-sections. Recent improvements in the CEBAF injector polarimeter scattering chamber have improved signal to noise.

Published
1998
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10. Search for Dispersive Effects in Elastic Electron Scattering fromC12

Author

D. Rychel, H. Miska, G. Fricke, L. S. Cardman, H.J. Emrich, C. W. de Jager, H. de Vries, and E.A.J.M. Offermann

Subjects
Diffraction, Physics, Nuclear reaction, Renormalization, Elastic scattering, Cross section (physics), Scattering, Dispersion relation, General Physics and Astronomy, Charge density, Atomic physics
Abstract

A significant energy dependence was observed in the region of the first diffraction minimum of the form factor for elastic electron scattering from /sup 12/C between 238 and 419 (and 431) MeV. This effect might be attributed to dispersive (two-step) processes.

Published
1986
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11. The Illinois Cascade Microtron a Proposal for a High Duty Factor, Intermediate Energy Electron Accelerator

Author

L. S. Cardman

Subjects
Physics, Nuclear and High Energy Physics, Klystron, Cyclotron, Particle accelerator, Linear particle accelerator, law.invention, Nuclear physics, Nuclear Energy and Engineering, Cascade, Duty cycle, law, Electrical and Electronic Engineering, Microtron, Beam (structure)
Abstract

The Nuclear Physics Laboratory at the University of Illinois currently operates a 6-traversal Microtron Using a Superconducting Linac, MUSL-2, which provides 100% duty factor electron beams with energies between 2 and 80 MeV. We have submitted to the National Science Foundation a proposal to construct a 750 MeV cascade microtron capable of delivering 100% duty factor beams with currents of up to 100 ?A. Subharmonic RF splitting of the output beam will provide up to three simultaneous beams for experiments, with independently controllable currents (summing to 100 ?A). The proposal also includes two large building additions and the major new experimental equipment needed to exploit fully the research potential of this new accelerator.

Published
1983
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12. Absolute photofission cross sections of 235,238U measured with tagged photons between 40 and 105 MeV

Author

H. Ströher, L. S. Cardman, R. Bergère, P. Carlos, P. Bourgeois, J.L. Fallou, U. Kneissl, H. Ries, W. Wilke, G. Mank, P. Garganne, and A. Veyssière

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Range (particle radiation), Photon, Isotope, Fission, Photofission, Atomic physics, Nuclear Experiment, Parallel plate
Abstract

Absolute photofission cross sections of 235,238U have been measured in the energy range 40–105 MeV with “tagged” photons, using parallel plate avalanche counters for a direct detection of the fission fragments. The measured cross sections are nearly constant in the investigated energy range and amount to about 17 mb for both isotopes. The results are compared with recent photoneutron data.

Published
1984
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13. Magnetic Form Factor ofHe3

Author

J. M. Cavedon, B. Frois, D. Goutte, M. Huet, Ph. Leconte, J. Martino, X. -H. Phan, S. K. Platchkov, S. E. Williamson, W. Boeglin, I. Sick, P. de Witt-Huberts, L. S. Cardman, and C. N. Papanicolas

Subjects
Physics, Diffraction, Elastic scattering, Magnetization, Distribution (mathematics), Quantum mechanics, Helium-3, Degrees of freedom, Magnetic form factor, General Physics and Astronomy, Isotopes of helium
Abstract

The elastic magnetic form factor of /sup 3/He has been measured up to q/sup 2/ = 32 fm/sup -2/. Few-body theory fails to explain the location of the diffraction minimum unless nonnucleonic degrees of freedom are explicitly introduced.

Published
1982
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