Time Information Study of CsI(Tl) Crystal Calorimeter of BESⅢ

SHAN Li-Min; SHANG Lei; WANG Zhi-Gang; XIE Wen-Jie; QIN Gang; LIU Chun-Xiu; YU Bo-Xiang; DONG Ming-Yi; CAI Xiao; ZHOU Li; XIA Xiao-Mi; LAI Yuan-Fen; WANG Man; LIU Wan-Jin; SUN Li-Jun; FANG Jian; HE Miao; HU Tao; LV Jun-Guang

Chinese Physics C> 2006, Vol. 30> Issue(11) : 1091-1095

Time Information Study of CsI(Tl) Crystal Calorimeter of BESⅢ

Institute of High Energy Physics, CAS, Beijing 100049, China2 Shanxi Normal University, Linfen 041004, China

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Abstract：
The read out system of BESⅢ-CsI(Tl) calorimeter is based on FADC. The energy corresponds to the peak of signal waveform obtained by the scanning. In order to reduce the incoherent noise counts and improve the energy resolution a rough time information can also be fetched by counting the timing step number in FADC with a precision of 50ns besides the read out of energy information. The time information and the usage of this information in beam test are presented and discussed.

References

[1]

. Preliminary Design Report of the BESⅢ Detector. 2003,119-133 (in Chinese)(BESⅢ初步设计报告. 2003, 119—133)2. JIN Da-Peng et al. HEP NP, 2003, 27(10): 846-851(in Chinese)(金大鹏等. 高能物理与核物理, 2003, 27(10): 846—851)3. Design Report of BEPCⅡ (Accelerator Part)(in Chinese)(BEPCⅡ初步设计报告(加速器部分))4. LI Jia-Cai et al. HEP NP, 2004, 28(12): 1269-1277(in Chinese)(李家才等. 高能物理与核物理, 2004, 28(12): 1269—1277)

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SHAN Li-Min, SHANG Lei, WANG Zhi-Gang, XIE Wen-Jie, QIN Gang, LIU Chun-Xiu, YU Bo-Xiang, DONG Ming-Yi, CAI Xiao, ZHOU Li, XIA Xiao-Mi, LAI Yuan-Fen, WANG Man, LIU Wan-Jin, SUN Li-Jun, FANG Jian, HE Miao, HU Tao and LV Jun-Guang. Time Information Study of CsI(Tl) Crystal Calorimeter of BESⅢ[J]. Chinese Physics C, 2006, 30(11): 1091-1095.

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Received: 2006-03-07
Revised: 2006-05-08

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沈阳化工大学材料科学与工程学院沈阳 110142

Time Information Study of CsI(Tl) Crystal Calorimeter of BESⅢ

Corresponding author: SHAN Li-Min,

Institute of High Energy Physics, CAS, Beijing 100049, China2 Shanxi Normal University, Linfen 041004, China

Received Date: 2006-03-07
Accepted Date: 2006-05-08
Available Online: 2006-11-05

Abstract: The read out system of BESⅢ-CsI(Tl) calorimeter is based on FADC. The energy corresponds to the peak of signal waveform obtained by the scanning. In order to reduce the incoherent noise counts and improve the energy resolution a rough time information can also be fetched by counting the timing step number in FADC with a precision of 50ns besides the read out of energy information. The time information and the usage of this information in beam test are presented and discussed.