Anode-coupled readout for light collection in Liquid Argon TPCs
Author(s)Moss, Z.; Collin, G. H.; Conrad, J.M.; Toups, Matthew; Bugel, Leonard G.
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This paper will discuss a new method of signal read-out from photon detectors in ultra-large, underground liquid argon time projection chambers. In this design, the signal from the light collection system is coupled via capacitive plates to the TPC wire-planes. This signal is then read out using the same cabling and electronics as the charge information. This greatly benefits light collection: it eliminates the need for an independent readout, substantially reducing cost; it reduces the number of cables in the vapor region of the TPC that can produce impurities; and it cuts down on the number of feed-throughs in the cryostat wall that can cause heat-leaks and potential points of failure. We present experimental results that demonstrate the sensitivity of a LArTPC wire plane to photon detector signals. We also simulate the effect of a 1 μs shaping time and a 2 MHz sampling rate on these signals in the presence of noise, and find that a single photoelectron timing resolution of ~30 ns can be achieved.
DepartmentMassachusetts Institute of Technology. Department of Nuclear Science and Engineering; Massachusetts Institute of Technology. Department of Physics
Journal of Instrumentation
Moss, Z.; Toups, M.; Bugel, L.; Collin, G.H. and Conrad, J.M. “Anode-Coupled Readout for Light Collection in Liquid Argon TPCs.” Journal of Instrumentation 11, no. 03 (March 17, 2016): P03020–P03020. © 2016 IOP Publishing Ltd and Sissa Medialab srl