 Sun Mar 22 17:45:07 2020, Laszlo, General, switching to primary beam,
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We have finished the measurement with the fragments.
Now Yury will setup up a primary beam through the FRS, but without target in FRS.
We are hoping for increased intensity and stable gas target.
The plan is to make a measurement with and without the scraper in order to see the effect of scraping the Rutherford scattering. |
Sun Mar 22 23:19:23 2020, Michael, General, ESR Vacuum readings, 
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Mon Mar 23 00:13:25 2020, Laszlo, General, SIS and ESR beam currents,
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Mon Mar 23 00:39:52 2020, Shahab, General, Ramping cycle picture and data,
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Complete ramping cycle recorded from Oscilloscope Tektronix MSOX2024A.
Stored as XLS file. |
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Mon Mar 23 01:17:26 2020, Shahab, General, Life time measurements using Schottky,
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Did Schottky measurements using 5 shots with and without gas target each
restarting the DAQ |
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Mon Mar 23 03:58:25 2020, Shahab, General, Kicker guy arrived,
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Kicker Guy (U. Blell) arrived in order to fix modules. |
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Mon Mar 23 07:56:51 2020, Laszlo, General, Yuri made magick and we operate again,
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DSSSD was moved out (HV switched off)
also the scraper was mistakenly moved.
Now we move everything back to its original position
We leave the scraper still in the "scraping position" in order to collect more data.
Soon we should switch to "without sctraper mode" |
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Mon Mar 23 09:33:11 2020, Laszlo, General, SIS failure again!,
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run096 is stopped |
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Mon Mar 23 09:47:05 2020, Laszlo, General, explanation of an ESR cycle,
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Mon Mar 23 11:32:42 2020, Laszlo, General, SIS went down again,
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run101 is stopped |
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Mon Mar 23 18:15:55 2020, Laszlo, General, noisy 90degree Xray det,
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Uwe found out, that there was some common ground effect between 90 and 145 degree detectors. after moving the grounds, we could record much more nicer (Gaus
shaped) peaks in the spectra. Now we continue with this settings |
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Wed Apr 8 23:02:24 2020, Laszlo, General, lmd to measurement pairing list,
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I use the following list of lmd files combined to a single root file for each measurement.
It is very important to highlight that sometimes the trigger==1 data got corrupted,massive number of trigger==2 like events appear on the detector as trigger==1 signal, because the gas jet target didn't switch off after its normal phase (gas jet remains ON during injection. Maybe some gas jet issue, maybe some bug in the pattern :/ ). To correct for this, one has to cut out these parts from the data. I did these cut outs by hand while looking at the event number vs I_ESR & density gas jet plot (see below). Probably this can be done also in a more automatized way, but I think this is not necessary. In the "124Xe with Scraper" data set it is only 1 time like this, in the 118Te data set 3 times. The other data sets seem fine to me.
-124Xe with scraper:
run090_0001.lmd run091_0001.lmd run092_0001.lmd run094_0001.lmd run095_0001.lmd run096_0001.lmd run098_0001.lmd run099_0001.lmd
if(!(i>1634880 && i<1652240)){do analysis} - (this if condition is valid only if one combines the lmd in numerical order)
(2. Xray calibration parameters)
-124Xe without scraper:
run100_0001.lmd run101_0001.lmd run102_0001.lmd run104_0001.lmd
if(true){do analysis}
(2. Xray calibration parameters)
-118Te with scraper:
run051_0001.lmd run053_0001.lmd run055_0001.lmd run057_0001.lmd run059_0001.lmd run064_0001.lmd run066_0001.lmd
run052_0001.lmd run054_0001.lmd run056_0001.lmd run058_0001.lmd run060_0001.lmd run065_0001.lmd run067_0001.lmd
Changing Xray cables!
run068_0001.lmd run070_0001.lmd run072_0001.lmd run074_0001.lmd run076_0001.lmd run078_0001.lmd run080_0001.lmd run082_0001.lmd run084_0001.lmd run086_0001.lmd
run069_0001.lmd run071_0001.lmd run073_0001.lmd run075_0001.lmd run077_0001.lmd run079_0001.lmd run081_0001.lmd run083_0001.lmd run085_0001.lmd run087_0001.lmd
For Xray analysis:
1. dataset:
Xray[2] = 90 degree Xray[1]=145degree. The timing is switched:
if(!(i>1801830 && i<1807810) && !(i>2348370 && i<2355110)){
if(t_Xray[2]>0) Xray[1] ->Fill();
if(t_Xray[1]>0) Xray[2] ->Fill();
}
(1. Xray calibration parameters --> invalid!)
2. dataset:
if(!(i>5488450-2507171 && i<6125720-2507171)){do analysis}
(2. Xray calibration parameters)
For Si analysis:
if(trigger==1 && !(i>1801830 && i<1807810) && !(i>2348370 && i<2355110) && !(i>5488450 && i<6125720) ){do analysis}
(1. Xray calibration parameters)
-124Xe with scraper - low rate measurement
run046_0001.lmd run047_0001.lmd run047_0003.lmd run048_0002.lmd run049_0002.lmd run050_0001.lmd
run046_0002.lmd run047_0002.lmd run048_0001.lmd run049_0001.lmd run049_0003.lmd run050_0002.lmd
if(true){do analysis}
(1. Xray calibration parameters --> invalid!)
Regarding the gain matching, I assumed that the same 2*16 factors can be used for all data sets, since we didn't change bias voltage (the current remained roughly also the same) and also the detector didn't get any serious radiation damage (this needs to be confirmed!).
A more detailed anaylsis will come on the gain matching after the Easter holiday.
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Tue May 19 16:48:15 2020, Laszlo, General, E127 beamtime overview,
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Here is a representation how was the time management during E127. The time, what we could spend with measuring the 118Te(pg), was ~20% comparing to the given 6days. |
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Tue May 18 21:08:16 2021, ESR team, General, Beam stacking, 2021
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Beam stacking. 3 pulses, stochastically cooled and stacked on an inner orbit |
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Wed May 19 13:47:26 2021, Jan Glorius, General, GasTarget Operation, 2021
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We have two tasks to take over for the target operation:
1. We have to refill the blue LN2 bottle on the roof of ESR every morning (see 1st attached foto)
For this we use the small silver dewar on the floor there. In case this dewar is empty we have to refill it in the yard.
No need to stop the measurement for this.
2. We have to monitor the LN2-level warning on Ulis web page: http://ulpc24.gsi.de/mediawiki/index.php
In case there is a warning (~12h remaining), we have to refill the big dewar at the target in ESR.
This means we need ESR on TSG with the gate open.
In case the nozzle is clogging and we do not reach reasonable densities anymore and E1 pressure is going down, we have to heat up the nozzle manually.
This can be done at the control panel on the roof of ESR (see 2nd attached foto).
The proceedure is:
1. push "set point"
2. type new value in Kelvin (e.g. 100K for start of heating)
3. press "enter" to apply or "escape" to correct typo
4. monitor E1 pressure (should go up)
Overview page:
https://popps.org/cgi-bin/jet.py?gasart=Wasserstoff |
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Wed May 19 15:09:22 2021, Helmut Weick, General, FRS settings, LISE file, 2021
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Here is a setting plan for FRS and corresponding LISE files.
2 LISE files still use the old FRS-ESR optics, one the new with S6 focus on slits.
But this does not make a big difference for the simulation, only dispersion S2-S6 is lower.
For realistic contaminants you must open the slits at S6 more(~ +/-10mm).
Added a list of fragments and expected frequencies after cooling at 400 MeV/u.
Only nuclides close to 118Te in m/q should be cooled. |
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Wed May 19 19:47:14 2021, Yuri, General, Beam Halflife at 30 AMeV, 2021
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Thu May 20 17:31:50 2021, Jan, Laszlo, Beatriz, General, beam & target alignement, 2021
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beam and target alignement was checked by looking at the Xray rates. Best case when:
Target bump (position) SC 9: -18.5mm
(We were aiming to keep the particles in the beam at a const. level when target switched ON)
pos bdt
-21 800
-20 1000
-19 1300
-18 1300
-17 1000
-16 500 |
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Thu May 20 18:11:24 2021, Laszlo, General, Touching the beam with Dsssd - current change, 2021
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Thu May 20 18:13:55 2021, Laszlo, General, Vacuum change while Si movement, 2021
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The vacuum remained in the E-10 range after moving the dsssd. The oscillation in the vacuum.values are due to the
magnets ramping up and down |
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