Measurement of the inclusive p-C analyzing power and cross section in the 1 GeV region and calibration of the new polarimeter POMME

Bonin, Bernard; Boudard, A.; Fanet, Hervé; Fergerson, R. W.; Garçon, M.; Giorgetti, C.; Habault, J.; Meur, Jean-Yves Le; Lombard, R.M.; Lugol, J.C.; Mayer, B.; Mouly, J.P.; Tomasi–Gustafsson, E.; Duchazeaubeneix, J.C.; Yonnet, Jean‐Paul; Morlet, M.; Wiele, J. Van de; Willis, A.; Greeniaus, G.; Gaillard, G.; Markowitz, P.; Perdrisat, C. F.; Abegg, R.; Hutcheon, D.A.

doi:10.1016/0168-9002(90)90128-s

Cited by 50 publications

(5 citation statements)

References 10 publications

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“…This efficiency is defined as the ratio of the detected events used for a polarization measurement to the number of stored beam particles lost in the process. This is close to the limit for any polarimeter configuration [27][28][29].…”

Section: Jinst 15 P12005supporting

confidence: 77%

A new beam polarimeter at COSY to search for electric dipole moments of charged particles

et al. 2020

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A calorimetric polarimeter based on inorganic LYSO scintillators is described. It has been designed for use in a storage ring to search for electric dipole moments (EDM) of charged particles such as the proton and deuteron. Its development and first use was on the Cooler Synchrotron (COSY) at the Forschungszentrum Jülich with 0.97 GeV/c polarized deuterons, a particle and energy suitable for an EDM search. The search requires a polarimeter with high efficiency, large analyzing power, and stable operating characteristics. With typical beam momenta of about 1 GeV/c, the scattering of protons or deuterons from a carbon target into forward angles becomes a nearly optimal choice of an analyzing reaction. The polarimeter described here consists of 52 LYSO detector modules, arranged in 4 symmetric blocks (up, down, left, right) for energy determination behind plastic scintillators for particle identification via energy loss. The commissioning results of the current setup demonstrate that the polarimeter is ready to be employed in a first direct measurement for an EDM on the deuteron, which is planned at COSY.

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Section: Jinst 15 P12005supporting

confidence: 77%

A new beam polarimeter at COSY to search for electric dipole moments of charged particles

et al. 2020

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Section: General Considerationssupporting

confidence: 77%

A New Beam Polarimeter at COSY to Search for Electric Dipole Moments of Charged Particles

Müller,

Javakhishvili,

Shergelashvili

et al. 2020

Preprint

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A calorimetric polarimeter based on inorganic LYSO scintillators is described. It has been designed for use in a storage ring to search for electric dipole moments (EDM) of charged particles such as the proton and deuteron. Its development and first use was on the Cooler Synchrotron (COSY) at the Forschungszentrum Jülich with 0.97 GeV/c polarized deuterons, a particle and energy suitable for an EDM search. The search requires a polarimeter with high efficiency, large analyzing power, and stable operating characteristics. With typical beam momenta of about 1 GeV/c, the scattering of protons or deuterons from a carbon target into forward angles becomes a nearly optimal choice of an analyzing reaction. The polarimeter described here consists of 52 LYSO detector modules, arranged in 4 symmetric blocks (up, down, left, right) for energy determination behind plastic scintillators for particle identification via energy loss. The commissioning results of the current setup demonstrate that the polarimeter is ready to be employed in a first direct search for an EDM on the deuteron, which is planned at COSY in the next two years.

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“…The available data, as well as the projection from the future JLab experiment E12-07-109 [8], are shown in Figure 1. Note that polarization experiments are made possible by the tremendous progress in hadron polarimetry at the Saturne synchrotron [9,10]. Higher momenta are presently achievable only in Dubna, where the ALPOM collaboration currently pursues systematic studies [11,12].…”

Section: Recent Highlights On Space-like Proton Form Factorsmentioning

confidence: 99%

Dynamical Properties of Baryons

2021

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The internal structure of composite particles is conveniently described in terms of form factors (FFs)—these are experimentally accessible in annihilation and scattering of elementary reactions, and are theoretically calculable by all models that describe the properties of particles. FFs depend only on one kinematical variable, q2. This is the four-momentum transferred by the virtual photon that carries the interaction. Important developments in accelerator and detector techniques have brought impressive advances, both by extending the kinematical region and by reaching a higher precision. A critical review on the underlying methods and findings in polarized and unpolarized experiments is presented. The unique role played by polarization in determining the ratio of electric to magnetic form factors in the space-like region, and the extraction of individual form factors in the whole kinematical region, are described. Recent results at electron accelerators and electron–positron colliders confirm the existence of periodical structure in the annihilation cross section. We suggest a global framework which describes the dynamical structure of charge distribution in baryons, in order to build a coherent view of the creation and annihilation of baryonic matter.

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Measurement of the inclusive p-C analyzing power and cross section in the 1 GeV region and calibration of the new polarimeter POMME

Cited by 50 publications

References 10 publications

A new beam polarimeter at COSY to search for electric dipole moments of charged particles

A new beam polarimeter at COSY to search for electric dipole moments of charged particles

A New Beam Polarimeter at COSY to Search for Electric Dipole Moments of Charged Particles

Dynamical Properties of Baryons

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