 Thu Jun 13 10:42:02 2024, Danyal, General, Question
|
What is the ion beam lifetime, according to the DCCT and Schottky?
Can somebody measure it, please?
Yesterday we could not see a fast drop in the "main" beam.
|
|
Fri Jun 14 13:14:29 2024, Konstantin, Bernhard, Peter, Lukas, General, DAQ crashes at :10
|
10 Minutes past a full hour (XX:10) the windows PCs (sometimes) loose connection.
This causes the labview server & the laser remote ctrl to crash.
|
|
Sat Jun 1 19:19:07 2024, Carsten, Detectors, Reminder: Check signals in scope and in DAQ of detectors with voltages switched off (vs. CFD threshold)
|
When the ion pumps and vacuum gauges are switched off the scaler data of
PMT_south, PMT_middle, PMT_north, PD_NO, PD_SO, PartDet North, PartDet South and (Channeltron) should be checked without voltages applied in dependence
on the CFD thresholds to determine the "cable noise level" at which thre are NO entries other than 0 in hte spectra (minimum background).
|
Mon Jun 3 18:24:44 2024, Rodolfo, Detectors, PMT arrangement 
|
The picture shows the actual configuration of the PMTs.
We are using a 4-Channel High-Voltage supply. The channels are labeled according to the PMTs names.
|
|
Tue Jun 4 22:54:02 2024, Rodolfo, Detectors, PMT - Manufacture - Test Result Data
|
| |
|
Wed Jun 5 19:22:43 2024, Carsten, Konstantin, Rodolfo, Detectors, PMT tests and preliminary thresholds
|
For all channels of the CAEN CFD the width of the logic signal is set to 255ns (maximum) to mitigate potential double pulses. For the very low count rates
of the experiment this is not problem.
|
|
Thu Jun 6 19:42:20 2024, Carsten, Detectors, Exchange of amplifer channels / cables channels / HV voltage cables for PMT south
|
In order to check if the problem of regular burst of pulses on the PMT south is related to amplfier channels and or the HV cable, the cheannels of the amplifiers
in the ESR were changed. Likewise, a different HV cable is now used for the supply of the PS.
|
|
Fri Jun 7 15:29:50 2024, Rodolfo, Detectors, Stored beam @ ESR
|
| One of the first PMT signals from the stored-ion beam @ ESR |
|
Sat Jun 8 12:02:20 2024, Carsten, Detectors, Test Particle Detectors - Det South not working
|
With the test beam from ESR I started to have a look at the PartDets.:
North outside: Works properly with a voltage of 1450 V
South outside (behind cooler) : no signal.
|
|
Sun Jun 9 10:08:24 2024, Carsten/Danyal, Detectors, Particle detectors - Recap of yesterdays work
|
[B]South (behind cooler) - "SA_SZ" - DD2...[/B]
We have put the particle detecotr North to the poistion behind the cooler (north) to replace the defective particle detector.
This detector is an old "Kozhuharov" style plastic szintillator that runs with a voltage of 1400-1500 V.
|
|
Sun Jun 9 10:20:38 2024, Carsten/Danyal, Detectors, Recap from yesterdays work with test beam (Detectors / beam /DAQ)
|
In the ESR we had thw whole day (saturday) a 400MeV/u bunched 238U92+ test beam (about 2 MHz). The RF signal is cabled as input to the DAQ (seperate post/entry).
Intensity is artificially reduced to a few 10^6 (with some tests alsodone at 10^5).
In all the tests the both particle detectors were moved in pus the empty pocket on the inside to mimick the background conditions during the run (aka no |
|
Wed Jun 12 21:21:15 2024, Yuri, Detectors, NTCap started
|
Fcenter - 244.6 MHz
BW - 10 MHz |
|
Mon May 27 13:37:31 2024, Jan, DAQ, MesyTec Shaper Control
|
For the 2nd DAQ the MesyTec Shaper ([URL=https://elog.gsi.de/esr/NucAR+lab/230418_110112/MesyTec_MSCF16-F-V.pdf]MSCF manual[/URL]) is used as a spectroscopy
amplifier and CFD.
It is controlled via the MesyControlGUI, which is installed on SADPC055 with a USB->mesyBUS connection to the MSCF.
|
|
Fri May 31 15:53:06 2024, Ruijiu Chen, DAQ, run NTCAP system
|
NTCAP is working again.
Connect the RF cable and the scaler cables to NTCAP system.
The map of signal is recorded in following link.
|
|
Fri May 31 16:49:52 2024, Carsten, DAQ, Wiring DAQ 1
|
Started to Check the wiring.
Status as of 2024-05-31
|
|
Sat Jun 1 18:00:20 2024, Carsten, DAQ, ReadOut Trigger im Timer Scaler changed because of faulty signal from frequency generator
|
Old readout trigger (~200 Hz) in 1MHz Scaler showed two nearby peaks indicating a jitter of the readout frequency or same faulty output driver of the frequency
generator Metrix GX240 used to produce the readout frequency (see below).
[IMG]elog:9/1[/IMG]
|
|
Sat Jun 1 19:00:57 2024, Carsten, DAQ, Change of (offline) frequency for common stop (CS) of VUPROMs (and 2nd TDC) and scaling factor
|
Temporarily, for tests of the second DAQ I changed the frequency from the frequency generator and scaling factor that is used for the common stop signal
to a value that is close to the expected value in the experiment.
Reason: For the second TDC (CAEN 25ps) TDC the time between to CS events must be of the order of 45 us. The TDC can store events up to about 51,x us and |
|
Sun Jun 2 00:01:46 2024, Carsten, DAQ, 25ps TDC CAEN V1290N DAQ2 lead to crash in DAQ2 due to a hardware issue
|
On the CAEN V1290N TDC the piggy board for the lower 8 channels is not fixed well to the motherboard.
That prevented to the whole DAQ2 to trigger correctly or even crash every once in a while. Long attempt sot find the error in hard and in software.
|
|
Thu Jun 6 09:23:53 2024, Konstantin Mohr, DAQ, Timing
|
The best way to adjust the bunch-laser timing is to start go4 (mbs must be running) from atppc023. Therefore use x2goclient and use the predefined session
to access LXG1297. Start go4 as usual ([URL=https://elog.gsi.de/esr/E0052/10]Entry 10[/URL] + [URL=https://elog.gsi.de/esr/E0052/11]Entry 11[/URL]).
|
|
Thu Jun 6 09:39:23 2024, Carsten, DAQ, Preliminary Channel Table (DAQ1 and DAQ2)
|
| |