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  laser spectroscopy on Be-like Kr, Page 3 of 6  Not logged in ELOG logo
ID Date Authordown Category Subject
  66   Sat Mar 1 07:14:48 2025 Night shiftRunsTabelle erster Scanbereich 257.175 nm - 257.300 nm
Zeit Scanbereich (nm) Anzahl Laserschritte Start LMD Stop LMD Messdauer (s) Elektronenkuehlung (s) Gentec Files Kommentar
06:53 Uhr 01.03.2025 257.175 - 257.2998 52 krypton0096 krypton0103 10 30 Gentec Suedwest, Scan1_257.175-257.300
08:05 Uhr 01.03.2025 257.2998 - 257.4246 52 krypton0104 krypton0111 10 30 Gentec Suedwest2, Scan2_257.2998-257.4246
10:20 Uhr 01.03.2025 257.4246 - 257.5470 52 krypton0112 krypton0113 10 30 Gentec Suedwest3, Scan3_257.4246-257.5470 10:41 measurement was stopped because beam is gone
11:08 Uhr 01.03.2025 257.4246 - 257.5470 52 krypton0114 krypton0114 10 30 Gentec Suedwest3.2, Scan3_257.4246-257.5494 First wavelength step at 11:08, no ions after fifth step. Scan aborted at 11:16
13:00 Uhr 01.03.2025 257.4246 - 257.5470 52 krypton0115 krypton0118 10 30 - Gentecs are logged automatically now; ecooler voltage 157409.6V, hf frequency is still the same (1.7838817MHz), beam gone at 13:16
15:41 Uhr 01.03.2025 257.4246 - 257.5494 52 krypton0119 krypton0126 10 30 -
16:38 Uhr 01.03.2025 257.5494 - 257.6750 52 krypton0127 krypton0133 10 30 -
1 2 3 4 5 6 7 8 9
  44   Fri Feb 28 00:19:04 2025 Konstantin, SebastianDetectorsPMT power supply
We checked the PMT signal inside the cave by using the local HV power supply. If one needs to repeat the measurement at another time, be careful to use the correct HV power supply, since the second one, which is mounted in the crate has the wrong polarity. Both PMT's must be supplied with a negative voltage.
During our tests the detector signals looked quite well and the background rate was below 10Hz. The baseline oscillated by 2mV (20mV after first amplification).

Subsequently, we did the tests of Entry 37 again. CH00 of the HV supply in the ESR container shows a higher leakage current of around 485muA at 2650V compared to 156muA at Ch01. Both channels could hold the voltage and the rate was measured with the LED at the XUV-detector operated a volage of 6V. See attachment.
Attachment 1: Screenshot_2025-02-28_00-33.png
Screenshot_2025-02-28_00-33.png
  39   Thu Feb 27 16:30:57 2025 Konstantin und RodolfoDAQHF Signal
We have exchanged the HF-Signal in the DAQ Electronic: from Dummy-HF to the real HF from accelerator.
  35   Thu Feb 27 09:38:04 2025 Konstantin & DanyalDetectorsLaufzeit Messungen
Gestern Abend haben wir die Signal Laufzeiten im gemessen:

PMT Mitte: 1213 ns (bis zur Messhütte ohne DAQ sind es 1025 ns) 
PMT Nord: 1212 ns
PD Nord: 1171 ns (ohne DAQ sind es 1172 ns) 

Weil PD Nord zu kurz war und wir es mit einem Gate&Delay nur um >40 ns Sekunden verschieben konnten, was gerade nicht reichte,
wurde entschieden dann PD Nord ein kleines delay zu geben, damit es 1240 ns sind. 
(Es gab kein passendes Kabel um anzupassen) 

Danach haben wir alle andere Laufzeiten mit Gate&Delay daran angepasst.  
PD Nord: 1240 ns 
PD Süd: 1240 ns  
PMT Nord: 1240 ns (offset war 27 ns, extra delay ist 165,88 ns) 
PMT Mitte: 1240 ns (offset war 28 ns, extra delay ist 166,2 ns)   
XUV Anode: 1008 +/- 1 ns (nur bis zu CFD in Messhütte)  Delay muss noch angepasst werden! 
  70   Sat Mar 1 13:45:42 2025 Konstantin DAQGentec readout
Gentec readout is now included in the general slow data acquisition. The issue was that the buffer of the power meter was not emptied fast enough. Now, the data is read out permanently in a separate thread. 
  36   Thu Feb 27 09:59:08 2025 KonstantinCalibrationHV-Divider
The readout of the HV divider runs on a RaspberryPi inside the HV-cave of the electron cooler.
Starting from 2025-02-27 09:42, the divider ratio was changed from 248517 to 248515. Usually, the
readout should run continuously. If not, the following procedure must be applied:

1. Connect to the Rasperry:
  ssh esr_cooler@140.181.95.195 (ask Konstantin for pwd)
2. Display logging screen:
  screen -R signals (Typically you can use arrow up)
3. Stop logging, if it is running:
  Option 1: Type "stop" and press enter.
  Option 2: control + C
4. Restart logging:
  "python main.py -i 0.1 -f loss_current -d 3 5"
5. Detach screen:
  control + a + d
6. Disconnect from Raspberry
  52   Fri Feb 28 15:53:44 2025 KonstantinAcceleratorHF Signal for Bunching
The HF Bunching Frequency is: 1.7838817 MHz

Given (read) by the ESR operators in HKR.
  55   Fri Feb 28 17:36:15 2025 KonstantinDAQTrigger events from accelarator
We will use GENESIS to create trigger events (injection, ...) for the DAQ
Attachment 1: 2025-02-28_17-34-15-990_1.png
2025-02-28_17-34-15-990_1.png
  57   Fri Feb 28 20:44:04 2025 KonstantinDAQUpdated Channel list
Final (hopefully) channel list:

TDC Channels
Channel # Kanalbelegung
0 Laser busy Kr
1 Next Laserstep Kr
2
3
4 PMT Mitte
5 PMT Nord
6 XUV Anode
7
8 Shutter open
9 Shutter close
10 Bunch HF (common stop)
11 Shutter auf
12 Shutter zu
13 PD NW / 89
14 PD SW / 89
15 AFG rep / 89



Scaler Channels
Channel # Kanalbelegung
16 DC Trafo
17 Injection
18 U-ecool
19 I-ecool
20 P-gun
21 P-coll
22 common stop (Bunch HF)
23 1MHz clock
24 Extraktion
25 Shutter (10kHz)
26
27
28
29
30
31


Shutter open signal attached at channel 8 is used as reference for the measurement window. This can be adapted in line 28 of the SetParameters.C file in the folder '/u/lascool/2025laserspectroscopy/kr_analysis/'.
Example:

fPar->piSoftwaregateLength = 20000; // How many CS after Shutter open used for signal in 4_LaserSteps/signal.

Currently, the common stop has a rate of 1.7838817 MHz divided by 89. This corresponds to approximately 50mus per common stop. With the setting of the example, the measurement window would be 1s after the shutter has opened.
  71   Sat Mar 1 16:33:22 2025 KonstantinDAQRestart of Go4
Restart of go4 before new scan:

1. Stop Acquisition (Stop button right next to the green play buttons)
2. clear histograms
3. Display the Analysis Terminal and execute command: ".x /u/lascool/2025laserspectroscopy/kr_analysis/SetParameters.C"
   This is important to reset the laser steps and load the most recent parameters. 
4. Restart Go4 Display (Press the right of the two green play buttons left to stop button)
5. Start the measurement with the laser GUI (File should be open!)
Attachment 1: Screenshot_2025-03-01_16-34-01.png
Screenshot_2025-03-01_16-34-01.png
Attachment 2: Screenshot_2025-03-01_16-45-30.png
Screenshot_2025-03-01_16-45-30.png
  74   Sat Mar 1 19:19:25 2025 KonstantinDAQOffline Analysis
A copy of the current go4 analysis is placed at atplaser@lxgs1055:/kr_analysis. Use the usual Go4 startup routine to start an offline analysis of data. They should be copied into the folder lxgs1055:/data.local2/E0075. To combine different 
lmd-files, simply create a file like "FirstScan.lml" containing the paths of the individual files. After this you can read the lml file with go4.
Attachment 1: Unbenanntes_Bild.png
Unbenanntes_Bild.png
Attachment 2: g042.png
g042.png
  93   Mon Mar 3 16:19:18 2025 KonstantinDAQchanged shutter timing - effective from 03.03.2025 @ 16:24 !
The power and the fluctuations of the laser should be recorded in the XUV Data, so that the rate can be corrected. 
Therefore the shutter timing was changed. 

Now, the shutter stays open for ~3 sec after the ion beam is dumped. 
See the pictures below.

This new scheme is active from 03.03.2025 @ ~16:24
Attachment 1: changed_shutter_timing.jpg
changed_shutter_timing.jpg
Attachment 2: changed_shutter_timing_in_DAQ.jpg
changed_shutter_timing_in_DAQ.jpg
  80   Sun Mar 2 16:51:53 2025 Jens, RodolfoGeneralSpaetschicht
Die Spaetschicht macht weiter, bzw. mit dem naeschten Scan (um 16:41 Uhr) angefangen. Siehe bitte Eintrag 75 (noch als Preview gezeigt).
  81   Sun Mar 2 18:55:30 2025 Jens, Reinhold, DanyalDAQMain Scan range (4 blocks) shifted by -0.0012 nm --> one more scan
We decided to scan the main range, shifted by -0.0012nm, one more time in order to have the non-shifted AND the shifted range both 3x !

Zeit Scanbereich (nm) Anzahl Laserschritte Start LMD Stop LMD Messdauer (s) Elektronenkuehlung (s) Kommentar
19:00 Uhr 02.03.2025 257.1738 - 257.2986 52 krypton0312 krypton0312 10 30 no beam in ESR, problem with HF of SIS18, closed file
19:28 Uhr 02.03.2025 257.1738 - 257.2986 52 krypton0313 krypton0319 10 30 same scan, started anew
20:22 Uhr 02.03.2025 257.2986 - 257.4234 52 krypton0320 krypton0326 10 30 empty shot at the end of the scan
21:15 Uhr 02.03.2025 257.4234 - 257.5482 52 krypton0327 krypton0334 10 30 -
22:08 Uhr 02.03.2025 257.5482 - 257.6754 52 krypton0335 krypton0342 10 30 -
  97   Mon Mar 3 20:14:10 2025 Jens, Konstantin, Reinhold, DanyalDAQ-0.0012 nm shifted whole range scan (@2nd ion energy)

Zeit Scanbereich (nm) Anzahl Laserschritte Start LMD Stop LMD Messdauer (s) Elektronenkuehlung (s) Kommentar
19:47 Uhr 03.03.2025 257.0562 - 257.1738 49 krypton0467 krypton0473 10 30
20:38 Uhr 03.03.2025 257.1738 - 257.2986 52 krypton0474 krypton0480 10 30
21:30 Uhr 03.03.2025 257.2986 - 257.4234 52 krypton0481 krypton0487 10 30
22:23 Uhr 03.03.2025 257.4234 - 257.5482 52 krypton0488 krypton0494 10 30
23:15 Uhr 03.03.2025 257.5482 - 257.6730 52 krypton0495 krypton0501 10 30
00:09 Uhr 04.03.2025 257.6730 - 257.7978 52 krypton0502 krypton0508 10 30
  41   Thu Feb 27 21:23:02 2025 JensDAQPython Data Channels
Python variables and names in DAQ
Because the Name of variables in DAQ doesnt match the the real variables, here is List of the channels and what value is in this channel

UTC : Time in seconds (UTC time in seconds)
TIMERMS : Time in 100ms (UTC time, only digits after decimalpoint)
VOLTECOOL : E-Cooler scaled Voltage / Volt (value / -1.e+4)
COBRASETWL : Laser Frequency / MHz (Thz Output of WLM / 1e08)
ATOSWL : Gentec1 "COM5" Southwest / pW (W of Gentec / 1e12)
ATOSINTENSITY : Gentec2 "COM6" Northwest / pW (W of Gentec / 1e12)
ATOSNUMIFM : not used (not used, only 1 digit)
STATFLUKE : not used (not used, only 1 digit)
STATATOS : not used (not used, only 1 digit)
COBMOTHI : E-Cooler raw Voltage / V (value / -1.e+8)
COBMOTLO : not used
COBNUMLOOP : not used
COBSTAT : not used
ATOSCNTR : not used
COBFROMWL : not used
COBTOWL : not used
COBINCREM : not used
COBSTEPNR : not used
HEINZREGVOLT : not used
STATAGILENT : not used
  73   Sat Mar 1 18:32:05 2025 JensRunsLaser während Scan
18:30Uhr:
Timestamp im Programm hat gehangen. Kurz im Anzeigefeld markieren und es ging wieder.
Laser Step Counter hat gehangen und lag mit 4Go 20 Steps auseinander. Da es früh genug auffiel wurde der Number of Steps von 52 auf 72 erhöht. Ist also unkritisch wenn es auffällt.
Vllt zusammenhang mit dem Hänger vom Timestamp?

Todo: Programm nach Scan neu starten und im Auge behalten. Am besten immer mal wieder mit Messhütte abgleichen.
Neustart mit zweiten Messzyklus um 18:58Uhr (ID 72)

Scheint nach Neustart keine Probleme zu machen. Falls der Log im Programm immer weiter gefüllt wird könnte das de Ursache für den Hänger sein. Alle paar Stunden den Log mal löschen/neustarten.

Zurücksetzen der Wellenlänge in 0,1nm Schritten klappt sehr gut. LBO Optimierer, ASE-Filter und UV-Optimierer laufen lassen und immer wenn die LBO Temp am Sollwert ankommt weiter drücken.
  96   Mon Mar 3 16:40:42 2025 Denise, Tamina, Bene, Sebastian, JensCalibrationTODO Lasercrew vor Ende der Messzeit
Prio 1: Gentec Suedwest kalibrieren (Wichtig fuer Auswertung)
Prio 2: Messung Strahlwanderung mit Wincam im Widescan und ohne (wichtig für zukünftige Strahlzeiten!!!!!)
Prio 3: Signal XUV Detektor in Abhängigkeit der Laserleistung
  31   Thu Feb 20 13:51:04 2025 Denise, SebatianDAQDAQ Channelliste
TDC Channels
Channel # Kanalbelegung
0 Laser busy Kr
1 Next Laserstep Kr
2
3
4 PMT Mitte
5 PMT Nord
6 XUV Anode
7
8
9
10 Bunch HF (common stop)
11 Shutter auf
12 Shutter zu
13 PD NW / 89
14 PD SW / 89
15 AFG rep / 89



Scaler Channels
Channel # Kanalbelegung
16 DC Trafo
17 Injection
18 U-ecool
19 I-ecool
20 P-gun
21 P-coll
22 common stop (Bunch HF)
23 1MHz clock
24 Extraktion
25 Shutter (10kHz)
26
27
28
29
30
31
  47   Fri Feb 28 04:47:39 2025 Denise, Sebastian, BenediktCalibrationGentec ESR Kalibration
Unsicherheiten Gentecs im allgemeinen bei etwa 6.5%

Gentec NW (PH100 S:UV) OD.3
Leistung Gentec PH100 NW/ mW1.01 1.4 3.3 4.7 6.4 8.1 10
Leistung hinter Keil/ mW 20.6 32.7 71.1 100 133 166 207
Leistung PM160T Laserlab/ mW 30 50 100 150 200 250 300


Kalibrierung :
Leitung hinter Keil[mW] = 2.72mW + 20.4 * Leistung Gentec[mW]


Gentec SW
hier ist die Leistung hinter dem Keil wahrscheinlich zu wenig, da bei der Messung der Strahl zu groß für den Detektor war.
Leistung Gentec PH100 SW/ mW0.3 0.8 1.5 2.3 3 4 4.6
Leistung hinter Keil/ mW 8.5 19.7 34.5 57 71.2 94 108
Leistung PM160T Laserlab/ mW 30 50 100 150 200 250 300


Kalibrierung hier gegen Leistung hinter Keil NW:
Leitung hinter Keil[mW] = 3.83mW + 42.6 * Leistung Gentec[mW]
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