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

Abstract : 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. In this paper, we describe the CSA, the shaper and the slow control part. The feedback network of the CSA is made of a capacitance and a resistor. Their values are respectively 250 fF and 4 MΩ. An input referred noise of, at most, 1500 e- rms must be achieved at −100°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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http://hal.in2p3.fr/in2p3-00684054
Contributor : Dominique Girod <>
Submitted on : Friday, March 30, 2012 - 2:22:01 PM
Last modification on : Tuesday, November 19, 2019 - 2:41:26 AM

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E. Bechetoille, H. Mathez, Y. Zoccarato. Charge Sensitive Amplifier (CSA) in cold gas of Liquid Argon (LAr) Time Projection Chamber (TPC). Topical Workshop on Electronics for Particle Physics 2010 (TWEPP-10), Sep 2010, Aachen, Germany. pp.C01005, ⟨10.1088/1748-0221/6/01/C01005⟩. ⟨in2p3-00684054⟩

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