Speaker
Lev Shekhtman
(Budker Institute of Nuclear Physics (BINP))
Description
The KEDR tagging system (TS) is designed to study two photon interactions
at the VEPP-4m collider. In order to reject the background from single
Bremsstrahlung (SBS) at the colliding beam at higher energies (above 4GeV
at CM) and improve the resolution of the TS the upgrade of the present
system is being performed. Each station will be equipped with the triple-GEM
detector that can provide measurements of track position in two dimensions
and improve spatial resolution in the orbit plane to better than 0.1 mm. The
system consists of 8 stations and thus 8 triple-GEM detectors are needed
with the dimensions from 12.8×10 cm 2 to 25.6 ×10 cm 2. The 2D position
sensitivity is provided by the specially designed 2-layer readout plane.At
present all the detectors are mounted and tested with Sr 90 β-source. Three
detectors are installed and operating at VEPP-4m. The measurements of
main detector parameters with the source and cosmic rays and the first
results of the beam measurements will be presented.
Author
Lev Shekhtman
(Budker Institute of Nuclear Physics (BINP))
