Charge Sensitive Amplifier (CSA) in cold gas of Liquid Argon (LAr) Time Projection Chamber (TPC)

被引:0
|
作者
Bechetoille, E. [1 ]
Mathez, H. [1 ]
Zoccarato, Y. [1 ]
机构
[1] Univ Lyon, CNRS, IN2P3, IPNL,MICRHAU, F-69622 Villeurbanne, France
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中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper presents our work on a 8-channel low noise Front-End electronic coupled to a Liquid Argon (LAr) TPC (Time Projection Chamber). Each channel consists of a Charge Sensitive Amplifier (CSA), a band pass filter and a 50 Ohms buffer as line driver. A serial link based on a 'i2c-like' protocol, provides multiple configuration features to the circuit by accessing slow control registers. Only the CSA part is described in this paper. The feedback network of the CSA is made of a capacitance and a resistor. Their values are respectively 250 fF and 4 M Omega. An input referred noise of, at most, 1500 e-rms must be achieved at -100 degrees C with an input detector capacitance of 250 pF to ensure a correct measurement of the minimal signal of 18000e- (2.88 fC). The power consumption in this cryogenic setup must be less than 40 mW from a 3.3 V power supply.
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页码:1350 / 1353
页数:4
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