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 |