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Front-end electronics for PHENIX time expansion chamber

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27 Author(s)
Barish, K. ; California Univ., Riverside, CA ; Chang, W.C. ; Dietzsch, O. ; Ferdousi, T.
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Front-end electronics (FEE) has been developed for the PHENIX time expansion chamber (TEC), a multiwire tracking detector with over 20k readout channels. The FEE for the TEC consists of an analog preamplifier-shaping amplifier circuit board, a digital front-end module circuit board plus ancillary support boards for timing, control and communication. Signals from each chamber wire are sampled (∼40 MHz), digitized, buffered, and then formatted as 64 channel serial data packets to be transmitted via a 1-GHz optical link. Three custom ICs have been designed for this system: 1) octal preamplifier and shaping amplifier with tail cancellation and dual-gain for large dynamic range with full serial control of gain, shaping time and tail; 2) nonlinear 5-b flash ADC with 9-b dynamic range; 3) digital memory unit for programmable delay and memory depth. The FEE has been installed, commissioned, and operated in the PHENIX experiment at Brookhaven National Laboratory.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:49 ,  Issue: 3 )

Date of Publication:

Jun 2002

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