The tagging system of the KEDR detector is a symmetrical focusing magnetic spectrometer for electrons and positrons scattered at small angles; it is embedded into the lattice of the VEPP-4M collider and intended for two-photon processes study. It measures scattered electron energy with resolution ΔE/E0=0.03%...0.6% (E0 is the beam energy). For precise energy scale calibration two methods are used: tagging of bremsstrahlung electron/positron by the photon energy measured by BGO calorimeter, and direct calibration using Compton backscattering spectrum edge. This report covers design and current status of the calibration system.
@article{arxiv.1705.10114,
title = {Energy scale calibration of KEDR detector tagging system},
author = {V. V. Kaminskiy and N. Yu. Muchnoi and V. N. Zhilich},
journal= {arXiv preprint arXiv:1705.10114},
year = {2017}
}
Comments
Proceedings of Instrumentation for Colliding Beam Physics (27 February - 3 March, 2017; Budker Institute of Nuclear Physics, Novosibirsk, Russia) 6 pages, 4 figures