AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
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Entry time:
Wed Nov 27 16:33:50 2019
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<p>HV core (-160 V) now attached to bottom 3 FEEs (with grounded kapton)</p> <p>DSSDs bias OK, leakages unchanged</p> <p>No appreciable change in waveforms</p> <p>Some estimates</p> <p>aida01/aida05/aida09 VHF noise: 5 channels frequency = 10 MHz ?</p> <p>All FEEs:<br /> Oscillation at ~25-35 channels = 1.4 to 2 MHz ?<br /> Varies a bit with each FEE.</p> <p>No obvious issue with upper FEEs unsure why 10 MHz is present - fee09 has been replaced but showed it before as well.</p> <p>Lower frequency noise on every FEE may be ground noise from e.g. switching PSU?</p> <p>No more access to S4 to check thoroughly again.</p> <p> </p> <p> </p> <p> </p> <p> </p>
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