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Message ID: 2     Entry time: 02 Nov 2019 11:44
Author: Alex Kish 
Type: Procedure/Operation 
Category: Cooling System 
Subject: Forcing recirculation 

Argon refills of the open bath are suspended in order to increase the deltaP between the TPC and the recirculation vessel, in order to force gas recirculation through the oxygen-sorption filter. The goal is to see S2 signal.

Currently the pressure is stable, fluctuations seezed over night. DeltaP very low, ~5 mbar.

Up to now (last check evening of November 1) sporadic noise with high amplitude and frequency ~50kHz was suddenly appearing when the FEBs are turned on, forcing to stop the data acquisiton.

Gas pocket: ON

Fields: ON

SiPMs: OFF

FEBs: OFF

DAQ: idle

LAr level in the open bath: >1/2

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