Title :
Performance of the BES III drift chamber
Author_Institution :
Inst. of High Energy Phys., Beijing, China
fDate :
Oct. 24 2009-Nov. 1 2009
Abstract :
To meet the requirements of BESIII experiment, the center tracking detector is a low-mass cylindrical drift chamber with small-cell geometry, using helium-based gas and operating in a 1 T magnetic field. Using the collision data of Psi (2 s) and J/Psi, the spatial resolution is 135 ¿m and the momentum resolution is 0.79% @ 1.846 GeV/c after calibration and alignment. The dE/dx resolution is about 5.1%. These results indicate that the drift chamber system has reached its expected performance.
Keywords :
calibration; drift chambers; helium; position sensitive particle detectors; readout electronics; BESIII experiment; Beijing Spectrometer III; He; alignment; calibration; center tracking detector; helium-based gas; low-mass cylindrical drift chamber; magnetic flux density 1 T; Calibration; Collaboration; Detectors; Geometry; Helium; Magnetic fields; Nuclear and plasma sciences; Shape; Spatial resolution; Wires; BESIII; commissioning; main drift chamber; performance;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-3961-4
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2009.5402071
