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

V E Blinov,V N Kudryavtsev,L I Shekhtman,N Yu Muchnoi,S A Nikitin,V V Kaminsky,I B Nikolaev

doi:10.1088/1748-0221/9/09/c09010

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

V E Blinov, V N Kudryavtsev + Show 5 more

https://doi.org/10.1088/1748-0221/9/09/c09010

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Journal: Journal of Instrumentation	Publication Date: Sep 1, 2014
Citations: 5

Affiliation: Budker Institute of Nuclear Physics, Novosibirsk State Technical University, Novosibirsk State University

#Resonance Depolarization Method #Gas Electron Multiplier + Show 8 more

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Abstract

To high precision measurement of Υ-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 σ confidence level.

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