AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
DESPEC
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Sat Mar 29 11:27:20 2025
Author
*
:
Subject
*
:
<p> <table width="98%" align="center" cellspacing="1" style="border:1px solid #486090;"> <tbody> <tr> <td cellpadding="3px" style="background-color:#486090; font-weidht:bold; color:white;">Quote:</td></tr> <tr> <td cellpadding="10px" style="background-color:#FFFFB0;"><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></td> </tr> </tbody> </table> </p><p> </p>
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown