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Full | Summary | Threaded     -- All entries -- Last day Last 3 Days Last week Last month Last 3 Months Last 6 Months Last Year -- Category -- Analysis Calibration DAQ Laser General Runs Detectors Accelerator  111 Entries

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ID Date Author Category Subject Text   1   Fri Jul 30 10:21:27 2021 Rodolfo Laser Kink The laser beamline in the ESR north arc has a [B]knik[/B], therefore the laser beam can not get the "laser tower" in the north east      2   Fri Apr 22 09:38:24 2022 Rodolfo Laser getting ready for Fluorescein548 We are going to change dye. Therefore I have take out the DCM-dye-solution* out of the dye circulators, rinsed them with Ethanol      3   Mon Apr 25 18:47:12 2022 Rodolfo Laser New dye circulators I have put into operation the new circulators (SN. 182231, 182201) for our dye laser (the Cobra). I have rinsed them with pure Ethanol      4   Mon Apr 25 21:47:28 2022 Rodolfo Laser green instead UV I am exchanging the optical elements (mirrors and lenses) for the laser spectroscopy on bismuth. At some places I am also exchanging      5   Tue Apr 26 16:28:14 2022 Carsten DAQ Cable of Bunch HF disconnected and 1.995Mhz signal connected for DAQ tests see subject.      6   Tue Apr 26 18:15:19 2022 Rodolfo Detectors XUV-Detector and Cu-Mirror Concerning the moveable detectors:  - I have switched off the power supply and      7   Fri Apr 29 21:18:12 2022 Rodolfo & Max Laser Fluorescein 27, Rh 610 + Rh 640 We (Max and Rodolfo) have tested the dyes. I have prepared the dye-solutions according to the recipes given in Sirah's User Manual.      8   Wed May 4 22:45:12 2022 Carsten, Sebastian DAQ Q-Switch Signal (ch15) fixed The "dead" Q-Switch signal was converted  two times... This explains why in the  Thorium experiment the Q-Switch signal       9   Wed May 4 22:55:37 2022 Rodolfo, Sebastian Laser FCU / Temp Control Bug We found a "Bug" in the control of the Sirah dye system.      10   Wed May 4 22:56:22 2022 Rodolfo, Sebastian, Konstantin Laser Laser step complete, scan complete fixed "Laser step complete" and "laser scan complete" are working again.      11   Thu May 5 15:24:34 2022 Sebastian Laser laser busy problem Current status:  Laser busy signal works correctly (5V if the grating moves, 0V if not) if the laser      12   Fri May 6 10:30:23 2022 Sebastian DAQ laser busy / dye out signal fixed Solution for a working laser busy / dye out signal was to disable the FCU and set the FCU status to "False" (see attached picture).      13   Fri May 6 10:35:06 2022 Sebastian DAQ laser step complete cabling changed I changed the laser step complete cabling from a quad coinc (see attached picture) to a Logic Fan In / Fan out (same as laser      14   Fri May 6 16:29:03 2022 Simon, Patrick Detectors PMT preparation We changed PMT north and PMT south and tested them at 1500 V.      15   Fri May 6 16:41:57 2022 Patrick, Rodolfo Laser Wavemeter We coupled the laser through a multi-mode fiber into the wavemeter. With the main amplifier enabled, we got enough      16   Mon May 9 09:43:08 2022 Zoran Accelerator ESR Beam The main control room started setting up the Bi beam this morning, but quickly stopped in order to solve some problems around the      17   Mon May 9 11:45:57 2022 Wilfried, Jon, Sebastian General HV Divider position & DMM calibration We performed an autocalibration (attached picture 1) of the Keysight 34465A DMM (TUD Keysight).      18   Mon May 9 13:48:20 2022 Rodolfo Laser Laser for H-like 209Bi I have changed the dye to Rhodamin 610 + Rhodamin 640. The Cobra wavelength can be tuned now from 600 to 630 nm.      19   Mon May 9 16:58:41 2022 Carsten Detectors Voltage particle dectectors NA_SZ und SA_SZ switched on Voltage SA_SZ (capture behind cooler): 1500 V (thin plastic scintillator) Voltage NA_SZ (capture behind target): 750V      20   Mon May 9 17:01:02 2022 Carsten DAQ directories / paths / comments / reduction factors /startup.scom files for the 2 DAQs [U][B]DAQ1 (original):[/B][/U] -user atplaser -runs on lxg1050      21   Mon May 9 17:14:02 2022 Carsten DAQ NTCAP DAQ The NTCap DAQ computer in the HKR (Schottky logbook) is started, and all preparations for data taking (mounting of NAS etc.) are      22   Mon May 9 17:16:34 2022 Carsten Accelerator Important: New ESR pattern - requies action for XUV detector in/out The ESR pattern is enhanced compared to the thorium experiment by additional machines that can be  used for cooling/waiting in      23   Mon May 9 19:05:17 2022 Wilfried DAQ Q-Switch signals + 0.5 ms and +1 ms in VUPROM We have generated two additional signals which are fed into two VUPROM channels: Q-Switch + 0.5 ms --> channel 9      24   Mon May 9 19:56:41 2022 Zoran Accelerator status Monday evening The main control room is setting up the SIS for extraction. At the moment there are 2.5E8 particles in the SIS. Later they will check      25   Tue May 10 09:05:19 2022 Zoran Accelerator status Monday evening > The main control room is setting up the SIS for extraction. At the moment there are 2.5E8 particles in the SIS. Later they will      26   Tue May 10 11:40:55 2022 Sebastian Accelerator still no beam @ESR There is still no Beam in the ESR. The beam is currently at TE3 - between SIS      27   Tue May 10 11:59:45 2022 Simon, Christopher, Kristian, Sebastian Laser Labview VI checkups The lower limit (to position) of the Cobra control VI has to be one increment smaller. This means for moving from 601,95 to 601,74      28   Tue May 10 15:26:35 2022 Rodolfo, Max Laser Laser stabilisation running It is now possible to stabilize and move the laser with both stages.      29   Tue May 10 20:35:42 2022 Phillip, Wilfried, Max Detectors PMT Threshold Since we have ions in the ring now, we looked at the PMT thresholds and the widths. In order to do so we looked at the Raw Signal      30   Tue May 10 21:41:17 2022 Rodolfo Accelerator T-Scraper The T-Scrapers at the electron cooler have an issue. They can't be moved in the horizontal direction using the DeviceControl.      31   Tue May 10 22:29:45 2022 Jan Glorius DAQ DAQ2 shaper settings Attached are the MSCF shaper settings applied on Tue May 10 at 22:30.      32   Tue May 10 22:37:10 2022 Jan Glorius DAQ DAQ2 cabling docu        33   Tue May 10 23:10:25 2022 Sebastian, Patrick, Volker, Guy Accelerator T-Scraper Reloaded We have established a Control to "manually" move the T-Scrapers via a "remote desktop". We can now move both scrapers in the horizontal      34   Tue May 10 23:53:42 2022 Rodolfo General shift change The night shift took over. They are trying now to overlap the ion and laser beams.       35   Wed May 11 01:09:07 2022 Patrick, Sebastian, Volker, Guy Laser Beam overlap We overlapped the laser with the ion beam. The ion beam positions are:      36   Wed May 11 03:10:55 2022 Patrick, Sebastian, Volker, Guy Laser Laser - bunch timing We added the delay and gate generator in between the bunch trigger and the CFD to move the timing of the PMT middle signal relative      37   Wed May 11 03:17:14 2022 Patrick, Volker, Guy Runs Start laser scanning Runs of the night shift. The wavelength range is 601.95 - 601.735 nm. We started the wavemeter python script on      39   Wed May 11 06:41:32 2022 Simon, Christopher, Shahab Runs shifts new shift started.      40   Wed May 11 06:47:58 2022 Simon, Christopher, Shahab Runs restart laser scan [TABLE border="1"] Time | SIS-intensity | ESR-intensity after      41   Wed May 11 07:28:39 2022 Simon, Christopher, Shahab General DAQ Loop for shifters Procedure: - Scanning phase ends (on LabView wait until      42   Wed May 11 08:01:44 2022 Zoran Runs Start laser scanning [quote] [I]Questions:[/I] [B]There are many other masses/isotopes/etc.      43   Wed May 11 14:48:31 2022 Konstantin DAQ Voltage range of the Keysight DMM changed from 10V to 1V During the setup of the ion beam the voltage range of the Keysight DMM was changed from 10V to 1V. Additionally, the name of the      44   Wed May 11 14:59:01 2022 Rodolfo Laser Laser status I have measured the output energy of the laser system. All values in [mJ] and over 500 laser-pulses average      45   Wed May 11 18:00:40 2022 Wilfried, Phillip, Max Detectors double PD NO peak problem solved In entry 36 one finds an additional PD NO peak around bin 100. This was caused by signal reflection in the      46   Wed May 11 18:13:04 2022 Wilfried, Phillip, Max DAQ laser scan/step complete The scaler channel laser scan complete and laser step complete is interchanged in go4. Carsten will fix this on the software side.      47   Wed May 11 20:47:54 2022 Zoran Accelerator beam lost in SIS For some reason the beam was lost in the SIS soon after taking the ESR beam this evening, reason unknown. Solved by sending teh full      48   Wed May 11 22:04:30 2022 Phillip, Wilfried, Max General spacial laser - ion overlap verified After the SIS/ESR optimization we checked the spatial overlap with the T-scrapers again.      49   Wed May 11 22:19:17 2022 Max, Wilfried, Volker Laser laser bunch timing We overlapped the laser and ion bunch in the time domain. The delay has to be set on the module above the laser and NOT in the ESR      50   Wed May 11 22:45:22 2022 Max, Wilfried, Patrick General scanning wavelength The scan parameters for the next shift are: in COBRACONTROL:      51   Wed May 11 23:34:39 2022 Patrick, Carsten Detectors Particle Detectors / Scraper positions Voltages of particle detectors off. Scraper positions:      52   Wed May 11 23:36:24 2022 Ruijiu Chen, Carsten, Guy DAQ start NTCAP. Carrier frequency:244MHz IQ rate: 10M Samples/seconds Reference level: -25      53   Thu May 12 00:16:13 2022 Patrick, Volker, Guy, Rui-Jiu Runs Runs night shift [TABLE border="1"] Time | SIS-intensity | ESR-intensity after      54   Thu May 12 03:25:37 2022 Patrick DAQ Laser scan complete signal off As in ID:46, the 'laser scan complete' again is not coming in. It is not very useful to repeatedly fix cable      55   Thu May 12 10:10:35 2022 Simon, Christopher, Wilfried, Sebastian DAQ 1ms gated PMT north / middle added to DAQ We added on DAQ1 and DAQ2 1ms gated PMT North and PMT Middle signals. Now we "supress" the signal by a factor of      56   Thu May 12 10:21:30 2022 Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried General No Beam There is no beam in the ESR due to some problem in the UNILAC.      57   Thu May 12 11:30:18 2022 Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried General Beam is back Beam is back in the ESR.      58   Thu May 12 11:31:11 2022 Simon, Christopher, Shahab, Wilfried, Sebastian, Ragan General Runs morning shift [TABLE border="1"] Time | SIS-intensity | ESR-intensity after      59   Thu May 12 12:02:56 2022 Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried General No beam There is no beam in the ESR again.      60   Thu May 12 12:51:30 2022 Ragan, Shahab, Simon, Sebastian, Christopher, Wilfried General Beam is back 12:50 Beam is back again in the ring. 12:52-until now Kicker problem in the ESR.      61   Thu May 12 14:04:09 2022 Konstantin DAQ Go4 Laserstep histograms adapted In order to correctly display the gated PMT signals [I]PMT Middle[/I] and [I]PMT North[/I] some modifications in the Go4 code were necessary.      62   Thu May 12 15:21:23 2022 Sebastian, Simon Laser Flash lamps changed We (Sebastian and I) changed the flash lamps of the Quanta Ray Laser and measured the output energy of the laser system afterwards      63   Thu May 12 15:34:47 2022 Max, Kristian, Sebastian DAQ laser scan, laser step and laser busy checked We checked all three signals in the Messhütte. Laser scan and laser step are OK. The Laser busy signal is for large increments      64   Thu May 12 15:50:33 2022 Max Accelerator No ESR beam Since 13:30 we have no beam in the ESR. There is a problem with the ESR septum. The magnets department is investigating.      65   Thu May 12 16:35:17 2022 Max, Wilfried, Zoran Accelerator NO BEAM UNTIL TOMORROW MORNING The problem at the ESR septum is serious. They have to remove the broken part and try to repair it.      66   Fri May 13 08:32:41 2022 Zoran Accelerator NO BEAM UNTIL TOMORROW MORNING > The problem at the ESR septum is serious. They have to remove the broken part and try to repair it.      67   Fri May 13 11:46:51 2022 Sebastian, Simon   Laser energy We (Sebastian and I)  measured the output energy of the laser system again.  All values in [mJ] and over 500 laser-pulses      68   Fri May 13 16:55:58 2022 Danyal, Carsten, Phillip, Wilfried General End of E128 Beamtime Dear all, unfortunately, the E128 experiment must now      69   Mon May 16 14:20:05 2022 Ragan, Danyal, Carsten, Phillip, Wilfried et al. General E128 Beamtime > Dear all, >  > unfortunately, the E128 experiment must      70   Mon May 16 15:57:37 2022 Rodolfo Laser Wavemeter calibration I have calibrated our Wavemeter WS7 using the temperature stabilized He-Ne Laser (SIOS EN60 825-1:2014). In the screenshots below      71   Mon May 16 17:15:56 2022 Carsten Analysis DAQ /Analysis - shift of peaks in the accumulated spectra, changes in code After a phone call with Wilfried I implemented an offset to all hit channels of the stacked / accumulated spectra where one chekcs the      72   Mon May 16 17:38:38 2022 Max, Danyal, Wilfried, Rodolfo General laser bunch timing We overlapped the laser and ion bunch in the time domain.  Therefore we delayed the bunching HF in order      73   Mon May 16 18:01:23 2022 mbsMax, Danyal, Wilfried, Rodolfo, Patrick, Kristian, David, Ruijiu Runs runs afternoon/night shift 16.05 These are the runs after the septum was repaired on 16.05.      74   Mon May 16 19:20:55 2022 Max, Wilfried Analysis start go4 before laser scan It is necessary to start go4 before you start the laser scan. Otherwise you get an offset in the laser Step plots.      75   Mon May 16 21:08:48 2022 Rodolfo & Max Laser Laser power We checked the energy of the laser and optimized it a bit      76   Mon May 16 22:19:54 2022 Patrick DAQ Keep go4 running (in theory), MBS To accumulate more data into the opened go4, do not restart MBS, but just      77   Mon May 16 22:57:40 2022 Patrick, Kristian, David, Ruijiu Detectors Switched off nitrogen Background counts with nitrogen and air. Less multiphoton events with air (see pictures, histogram extended to 30 with nitrogen).      78   Tue May 17 00:44:01 2022 Patrick, Kristian DAQ Changed PMT North CFD channel In run 8134 - 8135 PMT North showed a super high background rate. After the scan we checked the signal cables.      79   Tue May 17 06:37:28 2022 YL, KM Accelerator Reduced beam intensity The resonance in 209Bi has been seen during the night. Reducing the intensity by a factor~1000,      80   Tue May 17 10:38:44 2022 Konstantin Detectors PMT North changed PMT located at the northern window was again replaced by the narrow-band PMT (ET Enterprise type 9423 SB, SN: 650).      81   Fri May 27 10:39:53 2022 Kristian DAQ PMT North noise During the last run, PMT North showed some weird noise.      82   Fri May 27 14:57:23 2022 Rodolfo Laser Laser Energy I have started up the laser system (Q-Ray & Cobra) again. Here some parameters*:      83   Fri May 27 20:39:50 2022 Carsten Analysis Short Manual for updated Go4 DAQ (version 2022_05_27) Short descriptions of the most recent version of the GO4 code is attached. I will install the corresponding vesion early on sunday.      84   Mon May 30 00:56:33 2022 Max, Patrick Laser Beam overlap The ion beam positions are (+- 1mm):      85   Mon May 30 01:13:40 2022 Konstantin, Max, Patrick Detectors XUV-Detector voltage off XUV-Detector shows up to 100 kHz and, therefore, was turned off.      86   Mon May 30 02:12:20 2022 Max, Patrick, ~Konstantin, Ragan, Ken Runs runs night shift 30.05. These are the first runs of the substitute beamtime.      87   Mon May 30 02:33:45 2022 Patrick, MBS Max DAQ MBS procedure It is possible to keep go4 running now. Summary of the procedure:      88   Mon May 30 08:35:41 2022 Kristian, Simon, Ken, Ragan Detectors Changed PMT North We did not see any signal at PMT North which was the narrowband PMT. Changed it to the old solar blind PMT. Now we see the resonance.      89   Mon May 30 09:28:43 2022 Ken, Kristian, Simon, Ragan Detectors XUV-Detector 9:27 XUV-Detector is running again. -5V cathode, 8A main coil, 2.4A sec.coil      90   Mon May 30 16:17:39 2022 Kristian, David, Wilfried, Carsten, Danyal, Rodolfo Runs Afternoon shift 30.05 These are the first runs after changing to the thick stripper foil.      91   Mon May 30 19:00:19 2022 Carsten General Scraper Settings and Parameters for the last measrements with thick target old Bunch frequency: 1.98777 MHz Positions PL devices:      92   Mon May 30 19:42:20 2022 Rodolfo & Kristian Laser Changing laser wavelength We have changed the laser wavelength, e.g. the dye for the Cobra to Fluorescein 27.      93   Mon May 30 20:58:26 2022 Carsten Accelerator New Settings for 208Bi Beam Old SetParameters.C and old SetConditions.C were saved as SetParameters_209.C and SetConditions_209.C      94   Mon May 30 21:52:08 2022 Wilfried, Danyal, David, Rodolfo General Position of T-Scrapers We have determined the position of the H-like 208Bi ion beam using the T-Scrapers. The position actually did not change in comparison      96   Mon May 30 23:18:06 2022 Carsten, Rodolfo, Konstantin, Patrick, Ragan, Ken, Kristian, Max, Danyal Runs Runs shifts 31.05. These are the first runs with 208Bi. [TABLE border="1"]      97   Tue May 31 03:18:52 2022 Patrick, Konstantin Laser Laser timing The final timings are (in bins +-1): PD NO: 103      98   Tue May 31 15:19:58 2022 Max, Carsten, Danyal General scans for different E-cool currents until 15:15 we have measured with I_e = 100 mA (3 loops per file)       99   Tue May 31 17:22:09 2022 Max, Carsten, Danyal, Rodolfo, Wilfried General change E-cooler current I_e = 50 mA At 17:15 we changed again the E-cooler current I_e = 50 mA        100   Tue May 31 19:32:56 2022 Carsten, Wilfried, Max Calibration electron cooler calibration voltage - frequency [TABLE border="1"] SetVoltage (DeltaU) | MeasVoltage | freq | Current       101   Tue May 31 19:37:30 2022 Carsten, Max, Wilfried Detectors SASZ and NASZ voltages switched off SASZ and NASZ voltages were switched off bevor we went back to 209Bi. Laser beam stabilization turned off.      102   Tue May 31 19:59:49 2022 Carsten, Danyal Accelerator change in frequency mismatch 208Bi --> 209Bi time = 20:00  The RF has been adjusted so that it bunches      103   Tue May 31 21:08:04 2022 Carsten, Max Detectors XUV detector automation off We deactivated the automation of the XUV detector. It stays out now.      104   Tue May 31 21:58:55 2022 Max, Rodolfo Laser MRC Settings for 209Bi We have change the laser settings for the spectroscopy of 209Bi.       105   Wed Jun 1 00:03:08 2022 Konstantin, Simon, Kristian Runs 209-Bi runs [TABLE border="1"] Time | SIS-intensity | ESR-intensity after orbit change| cooler-HV | cooler current      106   Wed Jun 1 00:16:02 2022 Konstantin, Simon DAQ Timing 209Bi thick target Timing for the final measurements on 209Bi was determined for the new frequency 1.93777MHz. Peak positions are      107   Wed Jun 1 08:39:50 2022 Kristian, Konstantin Calibration Wavemeter reading We recorded files with high wavemeter readout rate and saved it at the atplaser network drive (Q:) - Bismuth - wavemeter folder.      108   Wed Jun 1 17:20:04 2022 Rodolfo Laser HeNe @ WS7        109   Fri Jun 3 12:01:17 2022 Danyal Detectors switched off XUV detector on 1 June ~17:00 I have switched off the XUV detector on 1 June at about 17:00.  The high voltages of the MCP (in ESR laser      110   Thu Jun 30 11:12:21 2022 Carsten Analysis Updated Go4 Analysis with small Bugfix (PMTOverWavelength SPectra) Here attached is a more recentversion of the Go4 Analysis Code with some smaller bugfixes. For adaequate *.C files please have alook      111   Fri Jan 13 17:05:22 2023 Rodolfo Laser Testing WS6 Testing the new Wavemeter (HighFinesse, WS6, SN3950) with the QRAY laser light @ 532 nm. Multimode fiber von High Finesse:FC/PC S      112   Wed Jan 18 13:02:12 2023 Rodolfo Laser Testing WS6 with Cobra Testing the WS6 (S.N. 3950) together with the Cobra.       113   Tue Jun 6 09:33:00 2023 Rodolfo Laser Fiber coupler Cobra's new fiber-coupling unit for wavelength reading.

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