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In this paper we demonstrate the capability of high voltage varistors and gasdischarge tube arrestors for use as surge protection devices in liquid argontime projection chamber detectors. The insulating and clamping behavior of eachtype of device is characterized in air (room temperature), and liquid argon(90~K), and their robustness under high voltage and high energy surges incryogenic conditions is verified. The protection of vulnerable components inliquid argon during a 150 kV high voltage discharge is also demonstrated. Eachdevice is tested for argon contamination and light emission effects, and bothare constrained to levels where no significant impact upon liquid argon timeprojection chamber functionality is expected. Both devices investigated areshown to be suitable for HV surge protection applications in cryogenicdetectors.

Testing of High Voltage Surge Protection Devices for Use in Liquid Argon TPC Detectors