 Fri Apr 8 05:46:35 2022, V. Hannen, Detectors, High background rate in Cu PMT points to light leak in ESR or active pressure gauge
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The background rate of the Cu mirror PMT is only about 300 cps when the mirror is in the parking position but ca. 7000 cps when in the beam position, even
if no beam is present in the ESR. This was noticed when we had an "empty injection" into the ring, causing the Cu mirror to drive into the beam position
with no ions present.
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Fri Apr 8 14:46:02 2022, Danyal & Sebastian & Volker & Ken, Detectors, high dark countrate Cu PMT solved 
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The problem - "discovered" by Volker and Ken - of the high dark countrate of the Cu PMT has been solved.
(when the Cu mirror was moved in, the dark countrate was very high ... also without ion beam)
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Sun Apr 10 03:56:56 2022, V. Hannen, Detectors, Low rate in PMT South
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PMT south shows a much lower count rate than observed in elog entry 170.
Yesterday the voltage on this PMT was increased to 2400 V and the threshold setting of the CAEN CFD to 90 units, (from 70 units before) however the low |
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Tue Apr 12 13:24:40 2022, Alexandre, Sebastian, Detectors, Sideband in Schottky
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Sometimes we see a broad sideband at lesser schottky frequencies to the high intensity thorium beam.
Pic 1 shows the relative broad sideband on the left.
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 Tue Apr 12 14:11:52 2022, Ragan, Detectors, Sideband in Schottky
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> Sometimes we see a broad sideband at lesser Schottky frequencies to the high-intensity thorium beam.
>
> Pic 1 shows the relative broad sideband on the left.
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Tue Apr 12 14:52:19 2022, Rodolfo, Detectors, PMT Nord, Middle. Datasheets
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Attached are the datasheets for the solar-blind PMTs.
- PMT Nord. Type 9423. SN: 650
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Tue Apr 12 17:01:30 2022, Konstantin, Detectors, Voltage PMT North
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| Voltage of PMT North has been increased from 2500 V to 2600 V. Additionally the threshold was adapted from 25 mV to 12 mV. |
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Thu Apr 14 12:27:18 2022, Sebastian, Max, Detectors, Connection to XUV / Cu reestablished!
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The connection to the XUV and Cu were lost during the nightshift.
The XUV detector was in the park position,
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Thu Apr 14 12:38:38 2022, Sebastian, Detectors, XUV / Cu checkups
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Check regularly if the connection to the XUV and Cu detectors are still active and the detectors move in (after injection) and out (after killing the ion
beam).
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Fri Aug 6 10:23:00 2021, Rodolfo, DAQ, atplaser on r4l-41
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The user [B]atplaser[/B] is now existing on the [B]R4L-XY[/B] nodes for the ESR group.
R4 = [B]R[/B]IO[B]4[/B] Computer
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Fri Aug 6 10:40:54 2021, Rodolfo, DAQ, mbs in atplaser
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The "MBS program" (data acquisition) is now located within atplaser@r4l-41, in the folder "th21":
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Fri Nov 5 17:23:23 2021, Rodolfo, DAQ, Dye trigger out
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The dye laser offers different scan settings (see pages 65 - 67 of the user manual). We are using the following setting, see attached screenshot, to produce
the status "laser busy" for the DAQ.
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Thu Mar 10 15:20:26 2022, Jan , DAQ, analog branch signal patches to Messhütte
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The additional signals from PMTs and XUV detector needed for spectroscopic analysis in the second DAQ are patched to AP Messhütte (MH) via the red patch
panel at the inside of the target region. The patch channels F1 to F8 (also labeled A to H in red on white) are used and extended by a cable bundle to
reach below the mirror chamber. Inside the MH the signals arrive at the red patch panel and are forwarded to the blue patch panel close to the laser DAQ |
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Wed Mar 16 08:31:52 2022, Kristian, DAQ, Check cables and timing
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Konstantin and I generated a signal in the Messhütte and sent it to the ESR.
There, we used a 44m BNC cable that was sufficently long to reach all detectors.
Our signal was connected instead of the PMT/PD. Hence, it was a roundtrip measurement.
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Fri Mar 18 16:51:27 2022, Carsten, DAQ, Main DAQ /MBS error
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| MBS error "TDC data ready wait" solved. Common stop trigger (20 kHz) was missing. (according to Sebastian) |
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Mon Mar 21 10:46:18 2022, Rodolfo, DAQ, TDC & Scaler description channels
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For the First Vuprom we have the following channel configuration (Stand:21.03.2021).
Please note 1.
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Mon Mar 21 16:33:23 2022, , DAQ, Changing code of go4
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We agreed to indicate changes in the go4 analysis code according to the
following scheme
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Mon Mar 21 17:03:47 2022, , DAQ, Changing code of go4
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Correction: Comments in C/C++ start with // , i.e. forward slash
[B]//--2022-mm-dd HH:MM comment on the respective change[/B].
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Mon Mar 21 21:48:46 2022, Jan, DAQ, MesyTec Shaper Control
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The MesyTec Shaper & Constant Fraction (MSCF) is used to process the PMT/det signals for the ADC in the second DAQ.
It can be setup on its front panel, but single channel setup is very tedious.
Remote control of the settings is possible using an epics server and client.
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Thu Mar 24 13:27:47 2022, Rodolfo, DAQ, Disk space - LXG1297
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In our Linux computer (LXG1297: Laser spectroscopy) we have a Drive with 1.8 TB total disk space. 300 GB are at the moment in use, but I can clean this.
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