The project of laser polarimeter for beam energy measurement of VEPP-4M collider by resonance depolarization method

To high precision measurement of Upsilon -meson masses with KEDR detector on VEPP-4M collider the beam energy calibration is needed. The project of laser polarimeter for beam energy measurement by resonance depolarization method is discussed. The polarization measurement is based on up-down asymmetr...

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Bibliographic Details
Published in:Journal of instrumentation 2014-09, Vol.9 (9), p.C09010-C09010
Main Authors: Blinov, V E, Kaminsky, V V, Kudryavtsev, V N, Muchnoi, N Yu, Nikitin, S A, Nikolaev, I B, Shekhtman, L I
Format: Article
Language:English
Subjects:
Asymmetry
Backscattering
Beams (radiation)
Calibration
Conferences
Confidence intervals
Instrumentation
Lasers
Polarimeters
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Summary:To high precision measurement of Upsilon -meson masses with KEDR detector on VEPP-4M collider the beam energy calibration is needed. The project of laser polarimeter for beam energy measurement by resonance depolarization method is discussed. The polarization measurement is based on up-down asymmetry of Compton backscatterring of circular polarized photons on vertical polarized electrons. Scattered photons are registered by two-coordinate detector based on Gas Electron Multiplier. Expected effect is about 1.6 % with 10[sigma] a confidence level.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/9/09/C09010