AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
BRIKEN
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Tue Jul 19 03:19:34 2016
Author
*
:
Subject
*
:
Preamplifier and signal cable testing We check all signal cables,the flat cable connector to BNC from ORNL/UTK and they are OK. While checking the preamplifiers (PA) we realized that on the oscilloscope some of the channels shown pulses without a load when HV is on. After some checks, we come to the conclusion that is a kind of discharge on the HV part of the preamp (which appears as positive pulse or negative pulses) and induce pulses of opposite sign in one or mos neighbouring channels. After systematically investigating them in the scope, we plug them in the DACQ to record the spectra. For this we include an additional digitizer SIS3316 to connect al1 channel preamps PA1(D):UPC:SN-0808223 -> V1A1 PA2(D):GSI:SN-1112572 -> V1A2 PA3(D):UPC:SN-0310315 -> V1A3 PA4(D):UPC:SN-0808220 -> V1A4 PA5(U):UTK: ? -> V1A5 PA6(U):UTK:SN-0808218 -> V1A6 PA7(U):UTK:SN-0713586 -> V1A7 PA8(U):UTK:SN-0808221 -> V2A1, V2A2 PA9(U):UTK:SN-0808215 -> V2A3, V2A4 PA10(U):UTK:SN-0808217 -> V2A5, V2A6 We measure first with a tube of each type connected to Ch#1 of each PA to adjust parameters of digitizers and range List-mode: 160717_preampCheck_000.dlt On-line: 160717_preampCheck.root Then we remove the tube from Ch#1 to see the effect in this channel: List-mode: 160717_preampCheck_noTubes_001.dlt On-line: 160717_preampCheck_noTubes.root We attach screenshots for both as compressed files (.zip) and the root files
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Resubmit as new entry
Attachment 1:
preampCheck.zip
Attachment 2:
noTubeCh1.zip
Attachment 3:
160717_preampCheck.root
Attachment 4:
160717_preampCheck_noTubes.root
Attachment 5:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown