# Instrumentation for Colliding Beam Physics (INSTR-17)

27 February 2017 to 3 March 2017
Budker Institute of Nuclear Physics
Asia/Novosibirsk timezone

## Energy Scale Calibration of KEDR Detector Tagging System

28 Feb 2017, 17:00
1h
Budker Institute of Nuclear Physics

#### Budker Institute of Nuclear Physics

11, akademika Lavrentieva prospect, Novosibirsk, Russia
Board: 1
Poster Colliders and detector integration

### Speaker

Viacheslav Kaminskiy (Budker Institute of Nuclear Physics SB RAS)

### Description

Tagging system of KEDR detector is a symmetrical focussing magnetic spectrometer for scattered at small angles electrons and positrons, which is embedded into the lattice of VEPP-4M collider. It is intended for two-photon processes study and measures scattered electron/positron energy with resolution $\Delta E/E_0 = 0.03\% \dots 0.6\%$ ($E_0$ 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 edges. Also the energy scale is defined using the model of TS magnetic system with accuracy comparable to energy resolution. This report covers the design and current status of the calibration system.

### Primary author

Viacheslav Kaminskiy (Budker Institute of Nuclear Physics SB RAS)

### Co-author

Prof. Nikolai Muchnoi (Budker INP SB RAS)

### Presentation Materials

There are no materials yet.