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  LIBELLE 2025, Page 1 of 5  Not logged in ELOG logo
ID Date Author Category Subject
  1   Fri Apr 25 15:45:39 2025 Jan GloriusDAQDR DAQ - MBS & Go4
The DR DAQ is located in AP Messhuette, here is the basic info.

MBS


node: x86l-151 (NUC)
user: litv-exp
screen session: DRdaq
MBS location: /esr/usr/litv-exp/MVLC/2025_DR_ESR (use symbolic link: /esr/usr/litv-exp/currentDAQ)

enter DAQ session with: /esr/usr/litv-exp/MVLC/2025_DR_ESR/daq.sh or ./daq.sh in the dir

kill and restart DAQ with: /esr/usr/litv-exp/MVLC/2025_DR_ESR/daqstart.sh or ./daqstart.sh in the dir

Recorded data:
WR timestamp
8 trigger types available
32 scaler channels available

Go4


PC: x86l-202 (but any with go4-login should work)
user: litv-exp (or any other)
MBS location: /esr/usr/litv-exp/go4/2025_ESR_DR_v0

path on lxg-machines: /lynx/Lynx/esr/usr/litv-exp/go4/2025_ESR_DR_v0

VNC server on x86l-202 can be used for Go4 or mvme if needed. Simply use the tigervnc icon "VNC x86l-202" on lxg-desktops of litv-exp.

RFIO & ESR-NAS


The data is stored via an rfio server (atprfio.gsi.de) on the ESR-NAS. The local folder on the NAS is /mnt/raw.data/2025_DRALS_Brandau/
The entire /mn/raw_data folder can be mounted to /esr/usr/litv-exp/exp_mnt/data.ESR on any x86l-XXX machine by using the alias "mountESR" or "sshfs -o directport=7777 atprfio.gsi.de:/mnt/raw.data /esr/usr/litv-exp/exp_mnt/data.ESR".
  Draft   Wed Apr 30 19:59:18 2025 CarstenDAQDR_DAQ
      	enum{TRIG_INJECTION=1, 
	    TRIG_NEWRAMP=2, 
	    TRIG_NEWVOLTAGE=3, 
	    TRIG_VOLTAGE_SUB1=4,
	    TRIG_VOLTAGE_SUB2=5,
	    TRIG_VOLTAGE_SUB3=6,
	    TRIG_VOLTAGE_SUB4=7,
//	    TRIG_VOLTAGE_SUB5=8,
//	    TRIG_VOLTAGE_SUB6=9,
//	    TRIG_VOLTAGE_SUB7=10,	    
	    TRIG_ENDOFRAMP=8, //presently 20 Hz MVLC
	};

        double  f_ParticleDetSA_sc; // 1: Particle Counter SA -*
        double  f_ParticleDetNA_sc; // 2: Particle Counter NA -*
		double  f_ParticleDetNI_sc; // 3: Particle Counter NI -*
		double  f_Injection_sc; // 4: Injection in Scaler -*
		double  f_NewRamp_sc; // 5: New Ramp in Sc -*
		double  f_NewStep_sc; // 6: New Step in Sc -*
		double  f_ICur_sc; // 7: Ion Current in Sc -*
		double  f_tm_sc; // 8: 1MHz  -*
		double  f_dummy09_sc; // 9: 
		double  f_HVDivider_sc; // 10: HV drifttubes, measured with divider -*
		double  f_dummy11_sc; // 11:
		double  f_ECurrent_sc; // 12: Electron Current Cooler -*
		double  f_CoolHV_sc;// 13: Voltage of Electron Cooler -*
		double  f_dummy14_sc; // 14:
		double  f_dummy15_sc; // 15: 
		double  f_tm100Hz_sc;// 16: 100 Hz from MVLC IO
        double  f_dummy17_sc; // 17:
        double  f_dummy18_sc; // 18:
        double  f_dummy19_sc; // 26:
        double  f_dummy20_sc; // 27:
        double  f_dummy21_sc; // 28:
        double  f_dummy22_sc; // 29:
        double  f_dummy23_sc; // 30:
        double  f_dummy24_sc; // 31:
        double  f_sub1_sc; // 25: Subtrigger 1 sc 
        double  f_sub2_sc; // 26: Subtrigger 2 sc 
        double  f_sub3_sc; // 27: Subtrigger 3 sc 
        double  f_sub4_sc; // 28: Subtrigger 4 sc 
        double  f_sub5_sc; // 29: Subtrigger 5 sc 
        double  f_sub6_sc; // 30: Subtrigger 6 sc 
        double  f_sub7_sc; // 31: Subtrigger 7 sc
        double  f_dummy32_sc; // 32:
  3   Mon May 5 11:29:28 2025 Rodolfo, Simon, Nils, VolkerDetectorsPMTs
These are the PMTs installed at the optical detection region:

Label Hersteller Model S.N. Sensitivity Operation voltage
Cu-Mirror Hamamatsu R1017 (sel) NA2313 Infrared -1300 V
PMT Nord ET Enterprises 9422 1042 UV -1500 V
PMT Middle ET Enterprises 9422A 1001 UV -1700 V
Attachment 1: SolarBlind_ET_9422_SN1042.pdf
SolarBlind_ET_9422_SN1042.pdf SolarBlind_ET_9422_SN1042.pdf SolarBlind_ET_9422_SN1042.pdf SolarBlind_ET_9422_SN1042.pdf
Attachment 2: ThornEmi_PMT9422A_SN1001_(1987).pdf
ThornEmi_PMT9422A_SN1001_(1987).pdf ThornEmi_PMT9422A_SN1001_(1987).pdf ThornEmi_PMT9422A_SN1001_(1987).pdf
Attachment 3: PMT_Arrangement_Libelle2025.jpg
PMT_Arrangement_Libelle2025.jpg
Attachment 4: PMT_R1017_Configuration_Beamtime2025.png
PMT_R1017_Configuration_Beamtime2025.png
  4   Mon May 5 16:26:07 2025 CarstenDAQDR Computer Names and IPs
Computers used for control of HV amplifiers and DR microcontrollers are
  • main control (big Philips monitor): sadpc058.gsi.de - 140.181.98.68
  • NUC in ESR (DAC and HV divider ADC) : sadpc.gsi.de - 140.181.80.66
  • Digilent scope in ESR (requires Digilent software installed, no user required): atpdev015.gsi.de - 140.181.82.76
  • Seuencer NUC in Messhuette : NN - 140.181.92.75
only user on these machines: dr_esr (ask for PW)

DR go4 /mbs is controlled on lxg3113 under user litv-exp
(Details in post 1), more details concerning directory of Go4 etc.yet to come.
  5   Mon May 5 21:13:29 2025 RodolfoLaserCollimation of laser beam
Here some parameters for the collimation of the laser beam

Periscope:
- Planconcav -500 mm
- Planconvex +1000 mm

Distance between both lenses: 504 mm.

Long Travel Stage @ 48,0 mm

The screnshot shows the laser spot at the screen "SO-Arc".
Attachment 1: Cobra593nm_Laserbeam_Collimation_2025-05-05.JPG
Cobra593nm_Laserbeam_Collimation_2025-05-05.JPG
  6   Tue May 6 15:35:12 2025 Rodolfo, KonstantinLaserMRC Settings
Following settings (P-Factor, Directions and Bandwidth) are used for the laser beam stabilization. Full energy (ca. 150 mJ @ 593 nm).

The triggers for the MRC are generated by AFG3102C. The settings (the same for both CH1 and CH2) are saved under "Abrufen / Setup2"
Attachment 1: MRC_Settings_Cobra593_VolleLeistung_2025-05-06.JPG
MRC_Settings_Cobra593_VolleLeistung_2025-05-06.JPG
Attachment 2: MRC_Controller_Settings_2025-05-06.jpg
MRC_Controller_Settings_2025-05-06.jpg
Attachment 3: AFG3202C_Settings.jpg
AFG3202C_Settings.jpg
  7   Wed May 7 14:02:58 2025 KonstantinDAQDAQ Folder
The folder of the data acquisition are:

Go4 (atplaser@lxg1297): ~/go4/drals
MBS (atplaser@r4l-41): ~/mbsrun/G038/DRALS
  8   Wed May 7 17:29:19 2025 Rodolfo, SimonDAQFast Photodiodes
Signal for the fast photodiodes. The laser beam
  • enters at the Nord-Ost (NO) Arc and
  • leaves at the Süd-Ost (SO) Arc.

The photodiodes themself are located inside the laser towers.
Attachment 1: FastPD-Signals_Messhütte_2025-05-07.jpg
FastPD-Signals_Messhütte_2025-05-07.jpg
  9   Wed May 7 20:31:52 2025 CarstenDAQDRALS cabling (DR part)
Green Corner, patch panel to ESR
All signals from/ to ESR TTL 5V.
Signals are GND decoupled with grey boxes! Don't use the signals directly.
    [1] New Ramp (NR) / Meas Gate
    [2] New Step (NS)
    [3] End of Ramp (ER) / COOL
    [4] to ESR: Start Measure Trigger
    [5] to ESR: Laser Trigger (~ 30 Hz)
    [6] MEAS0
    [7] MEAS1
    [8] VFC

Patch Panel "Green Corner" (DR) <-> "Blue Corner" (Laser)
Signals are neg NIM unless otherwise indicated
(i.e. the two signals from/to the DR Trigger side need to be TTL)
    [11] to DR side: Laser Trigger (TTL) => to do => done
    [12] from DR side Injection; signal comes from DR DAQ!!! => to do
    [13] Meas Gate
    [14] VFC
    [15] to DR side: Part Det South (Cooler) => to do
    [16] to DR side: Part Det North (Gas jet) => to do
    [25] COOL
    [26] MEAS0
    [27] MEAS1
    [28] New Step (NS)
    [29] SubTrig 1
    [30] SubTrig 2
    [31] SubTrig 3
    [32] SubTrig 4

NACOM 1 => Signals ar ORed as Master Readout Trigger and Counted in DRALS Scaler 9 to 16
    [1] COOL => SC Ch9
    [2] MEAS0 => SC Ch10
    [3] MEAS1
    [4] New Step (NS)
    [5] SubTrig 1
    [6] SubTrig 2
    [7] SubTrig 3
    [8] SubTrig 4 =Sc Ch16

The Measgate Signal (logic high when in measurement window) is ANDed with 100 kHz clock. The strobed signal is put in DRALS DAQ ( to do).
  10   Thu May 8 10:11:37 2025 CarstenGeneralSchottky spectrum ( 2 Harmonics) from the earlier 209Bi80+ Libelle run (thesis C. Trageser)
Attachment 1: Schottky_Libelle_on_209Bi80.png
Schottky_Libelle_on_209Bi80.png
  11   Thu May 8 10:21:10 2025 Carsten Link to thesis of C. Trageser NTCAP/ Automated Schottky analysis of cooler voltage and space charge)
The thesis of Christian might be helpful w.r.t. to energy calibration as it shows how to link Schottky frequency to ion energy (might be required since in DRALS the exact ion energy will be difficult to derive from voltage measurements only).
Cf., chapter 6 (thesis is in German)

Link: Thesis C. Trageser
  12   Thu May 8 13:33:13 2025 Rodolfo, SimonLaserCamera @ South-West Screen
Network camera to monitor the position of the laser beam after the electron cooler.

apdev017.gsi.de

user: admin
password: 1234
Attachment 1: Laserbeam@SW-Screen_2025-05-08.JPG
Laserbeam@SW-Screen_2025-05-08.JPG
  13   Thu May 8 17:23:51 2025 ShahabGeneralSchottky TV
setup Schottky TV:

connect to atppc030 using:

xfreerdp /u:atplaser /v:atppc030.gsi.de /w:1920 /h:1060

PW: given at label@LXG1297

this can be done also from the TCL computers

inside you open OBS Studio

then choose Video-Capture Device and both USB3 devices.
  14   Thu May 8 19:35:18 2025 Simon PMT count rates
I tested the PMTs and tried to reduce the background signal as far as possible.

PMT voltage (V) count rate (Hz)
Mid 1700 1200
North 1500 900
Cu 1300 1400


PMT Mid count rate strongly fluctuates.

Turning the light on in the ESR has no influence on Mid and North but increases the rate for Cu by 200Hz.
  15   Thu May 8 22:50:37 2025 CarstenDAQPreliminary Timing Settings
Tentatively:

DAC:
Meas Gate: 8000 ms (8000000 us)
Cool Time: 16800 us
Meas0,1: 16800 us
Ramp Time: 3000 us

SubTrigger (us):
1: 5500
2: 2000
3: 2200
4: 2400
5: 200 (not wired)
6: 200 (not wired)
7: 200 (not wired)

These values together with 30 Hz produce nice Timer spectrum with separated peaks.
  16   Thu May 8 23:36:19 2025 KonstantinDAQFileserver
To save files, the rfio-server must be started on lxg1297 in the folder /data.local2/BiDrals/. The file structure is

/data.local2/BiDrals/208Bi_XXX.lmd

where XXX is the current file number. To connect the mbs client to the file server, run the command

@connectdisk

on mbs. A file is opened and closed by running commands


@openfile
@closefile


respectively. To test whether a file is opened run

show acquisition

In the last rows of the output you will find the connection details and the status of the output file (see attachement). The attached screenshot displays that the RFIO server is connected and the file /data.local2/BiDrals/208Bi_090.lmd has been closed.
Attachment 1: MBS_SshowAcq.png
MBS_SshowAcq.png
  17   Fri May 9 00:56:07 2025 KonstantinDAQFirst Files
Files 91 + 92 were recorded with the Trigger logic as explained in ID 15. The laser was scanned from 593 to 592 in 101 steps. 100 laser steps were accumulated at each step. Bunching HF was synthesized by an AFG with a frequency of 1.787327MHZ and divided by 89
  18   Fri May 9 14:21:18 2025 RodolfoAcceleratorT-Scrapers
Information about the T-Scrapers at the ESR Electron Cooler. The width of the scraper is approx. 9 mm.

There was some issue about the Scraper GECEDS2VU. Herr Boywitt solved this issue and shortly communicated the procedure about how to move it.

Nils and me talked today with Sergey. He mentioned to go to position "-5 mm". Herr Boywitt wrote "-50", see below.

Mail vom 10.04.2025 um 13:26 Uhr.

Hallo alle,

wir haben den ESR Scraper instand gesetzt.

Am mittenkontakt hatte sich eine Verbindung gelöst, weiterhin haben wir den Mittenkontaktschalter neu justiert.
Der Antrieb sollte , um den Mittenkontaktschalter auszulösen, von der Endlage außen auf die Position -50 gefahren werden.

Viele Grüße
Robert
Attachment 1: Scrapereinstellung_am_ESR.pdf
Scrapereinstellung_am_ESR.pdf
  19   Fri May 9 17:47:07 2025 KonstantinDAQHV Divider
The HV voltage applied at the high-voltage platform of the electron cooler can be observed at HV-divider.
  20   Fri May 9 18:34:08 2025 KonstantinDAQImportant diagnoses of analysis parameters
The filling of some histograms in the go4 analysis framework is controlled by the SetParameters.C and SetConditions.C files.

The WinC conditions are applied to all histograms under the folder "Analysis/Histograms/0_Raw/Scaler"

Important note: Particularly dangerous is the "WinC" condition (Attachment 2), which tests whether an unexpected (high) number of hits was recorded in a single event. An exemplary raw spectrum of the 1MHz reference is shown in Attachment 3. In Attachment 4 the same spectrum is overlayed with two WinC conditions (red and green). While the red condition would reject every hit for further analysis, the green window would allow every recorded hit to be processed in further analysis steps.

The WinS conditions are applied to all histograms under the folder "Analysis/Histograms/3_TDC/Bins/accumulated". They define the phase interval relative to the bunching HF, within which hits are processed in the histograms under "Analysis/Histograms/4_LaserSteps"

In the SetParameters.C file the most important settings are:

pfRevolutionFrequency Must coincide with the revolution frequency (Not the bunching frequency!)
piCSReductionFactor Setting of the rate divider, which is applied before feeding into the VUPROM as stop trigger of the TDC channels
pfDwellTime Number of laser shots accumulated within one laser step
piSoftwaregateLength Defines how many common stops are used to fill "Analysis/Histograms/4_LaserSteps/signal"
piNOfLaserSteps Must coincide with the number of laser steps in Medusa


The parameter pfRevolutionFrequency and piCSReductionFactor define the display behavior of the time-resolved spectra. If you expect to observe bunches, check them. Another indicator for an erroneous selection is that the interval of the Q-Switch (laser shot) deviates from 1/30Hz = 33ms. The corresponding histogram can be found at "Analysis/Histograms/1_Diag/QSwitch/Q_Switch_interval"
Attachment 1: QSwitchDiagnose.png
QSwitchDiagnose.png
Attachment 2: SetConditions.png
SetConditions.png
Attachment 3: MHzScaler.png
MHzScaler.png
Attachment 4: MHZWinC.png
MHZWinC.png
Attachment 5: SetParameters.png
SetParameters.png
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