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 11:19:52 2025
Author
*
:
Subject
*
:
> 12.51 - detector bias and leakage currents - detector 3 has no current > - other detectors ok > > 13.13 - tried changing from HV3 cables to HV4 - still open circuit > > - tried different permutations of moving HV-4 braid and core cables (high voltage to ground connections) > > (dssd3) > > (all directions defined as if looking upstream) > > - core -> bottom, braid -> left open - circuit > > - core -> top, braid -> right trips at 8V > > - core -> bottom, braid -> right open - circuit > > - core -> top, braid-> left trips at 8V > > - removed jumpers - still trips > > 13.36 - testing continuity of bond wires on dsssd 3208-14 & 3208-15 > > - observe 20 ohm resistance on p+p and p+n bond wires > > 19:41 - dsssd 1 and 2 not biasing, 3 ok. > > - changed bias configuration -> HV core 1 & 2 now on top, braid on right > > - ribbon cables for DSSSD #1 & #2 p+n junction strips down were misaligned > > - all detectors biased succesfully > > HV cable configuration (looking upstream): HV-1 Core -> top-inner (FEE 1) > > HV-2 Core -> top-middle (FEE 5) > > HV-3 Core -> bottom-outer (FEE 11) > > HV-1 Braid -> right-inner (FEE 2) > > HV-2 Braid -> right-middle (FEE 6) > > HV-3 Braid -> left-outer (FEE 12) > > Attachment 3 - rough sketch of HV cable configuration, looking upstream. >
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown