MUST2 SAMURAI_2018 S3-LEB-LPC SUPERNEMO MUGAST EXPAND SCALP GALATRON HiCARI VELO
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Status ExpNbr Date Authordown Type Category Target-Source Subject
Fixede755 Sat Jun 30 08:24:07 2018 Freddy, Shumpei, LouisRUNGeneralCryo-LH2Run 195
Run 195

start: 8h08
stop: 12h09

37Ca setting
CATS12 ~ 15-20 kHz

  • I = 1.4 uA since 7h30 (2 uA during the night) - PCP: source decreasing -working on it
  • Estimation of (Transmission * Efficiency_IC) about 64 % (based on ICdE1 vs TCATS1_HF spectrum)
Fixede755 Sat Jun 30 13:25:27 2018 Freddy, Shumpei RUNGeneralCryo-LH2Run 196
Run 196

start: 12h09
stop: 15h38

37Ca setting

I = 2 uA
CATS12 ~ 20 kHz
Fixede755 Sat Jun 30 11:25:59 2018 Freddy, ShumpeiBEAMGeneralCryo-LH2Beam profile on the target
The beam profile on the target for each isotope is shown for all trigger and CATS trigger (GATCONF > 500).
X position seems not to depend on the isotope, while Y position depends on the isotope.
Now, 37Ca is a little bit higher form the center of the target, while 36K is almost at the center.
Fixede755 Thu Jun 28 11:08:54 2018 Freddy, Louis, ValerianRUNGeneral3-alphaIntermediate alpha calibration T1234
Run 171

3alpha source in front of T1234
start: 10h52

HV setting
T1: 80V
T2: 80V
T3: 70V
T4: 60V
T5: 80V
T6: 80V
T7: 80V
T8: 80V
Fixede755 Thu Jun 28 13:53:28 2018 Freddy, Louis, ValerianRUNGeneral3-alphaPedestal run + Alpha calibration with T4 at 80V
Run 172
  • Pedestal run on T1234
Run 173
  • Pedestal run on T5678

Run 174
  • alpha Calibration for T1234 with T4 HV 60->80V
Pinnede744 Fri May 25 14:10:34 2018 Freddy, Louis, LamaOFFLINEGeneral MM - dE_TOF diagnostic with/without CsI_E
Attached are some plot of dE-TOF PID for run 1004 after the threshold change ( 1 MeV --> 500 keV).

Putting a condition on CsI_E>0 select well punch through event as expected.
Fixede755 Wed Jun 27 04:12:57 2018 Freddy, LouisOFFLINEGeneral Summary 38Ca(p,t) - Run 128 to 152
Here are some plot summarizing the analysis status on the 38Ca(p,t) channel.

Run concerned: 128-152 (from 25/06 @ 17h11 to 26/06 @ 22h43)
Running time: 25 hours
Gates applied:
  • Target Impact (from CATS)
  • Triton in dE-E
  • Incoming 38Ca, TCATS2_HF in [200;1000]
  • Outgoing (Z=20)Ca, dE-E (IC-PL)

Integrals(all telescopes):
- Ground state : about 800 counts (250 / UT)
- First excited: about 80 counts (25/ UT)

When looking at individual telescopes, we found that:
  • Most of the statistics is equally spread between T1,T2,T3,T4
  • There is an overall shift in Excitation Energy between T1,2 and T3,4. For the gs, T1,2 are around -0.8 MeV while T3,4 are at -1.6 MeV.
  • The resolution is thus better when looking at one telescope only (ex: T1 only Sigma=0.63 but for all tel. sigma=0.96 MeV).

Remark:
  • After the 26/06 at 22h43 until the 27/07 at 4h, we had some beam interruptions, large beam fluctuations. Runs will be included (In progress).
  • If we add the 16h of data (from run 107 to 127) it reaches 41h of measuring time.
  • If we also add about 6h of data from the ongoing night it will reach 47h of measuring time (extrapolated roughly 1500 gs counts)
Fixede755 Wed Jun 27 04:46:00 2018 Freddy, LouisOFFLINEGeneral Summary 36Ar(p,t) - Run 128 to 152
Here are some plot summarizing the analysis status on the 36Ar(p,t) similar method as in the previous entry:

Run concerned: 128-152 (from 25/06 @ 17h11 to 26/06 @ 22h43)
Running time: 25 hours
Gates applied:
  • Target Impact (from CATS)
  • Triton in dE-E
  • Incoming 36Ar, TCATS2_HF in [5600;6200]
  • Outgoing (Z=18)Ar, dE-E (IC-PL)

Remark:
  • At the moment all Excitation energy plot shown for 36Ar(p,t) are calculated using a wrong reaction file (the one of 38Ca(,pt)36Ca). As a result all the peaks are completely shifted. An analysis using a dedicated file will be done but requires a full reprocessing of the files. It is anyway enough for statistics estimation.
  • In the total spectrum (all telescope) the statistics is about 2000 tritons, a similar number than for the 38Ca case. This is compatible with the fact that the 36Ar is present in a similar amount than the 38Ca in the cocktail beam.
Ongoinge744 Tue May 29 08:59:18 2018 Freddy, Iulian, PierreRUNGeneralCH2Run 2109 - Target 4 CH2 - Tuning run
Run 2109

Beam: 14O (1.5*10^5 pps)

start: 8h37m01
stop: 9h26

Target nbr 4: CH2 (104 um)


Remark:
- Telesecope 4 is tripping all the time during this run. Impossible to put more than 50V. Even at 40 V, the leakage current is fluctuating around 8 uA. It seems like it is dying.
- LISE spectrometer adjustment during run - The attached plot show the final result of the beam tuning.
Pinnede744 Tue May 29 09:30:42 2018 Freddy, Iulian, PierreRUNGeneralCH2Run 2110 - Target 4 CH2
Run 2110

Beam: 14O (1.5*10^5 pps)

start: 9h27m29s
stop: 9h50m35s

Target nbr 4: CH2 (104 um)

Warning: Telescope 4 HV was at 40 V at the beginning of the run. The leakage current finally stabilized and decreased down to about 1.5 uA. We tried to increase the HV to the nominal voltage of 80 V but the leakage current suddenly raised to 10-15 uA again. We decide to let it to 60V for a while. In short Telescope 4 data can't be used for this run.
Pinnede744 Tue May 29 09:54:01 2018 Freddy, Iulian, PierreRUNGeneralCH2Run 2111 - Target 4 CH2
Run 2111

Beam: 14O (1.5*10^5 pps)

start: 9h51m
stop: 10h30

Target nbr 4: CH2 (104 um)

Remark: T4 HV at 60 V during all the run.
Run stopped because something tripped in CSS1.
Fixede744 Wed May 30 11:42:41 2018 Freddy, AdrienRUNGeneralCH2Run 2119 - Target 4 CH2
Run 2119

Start: 11h25m53s
Stop: 13h24
Beam 14O at: 1.6*10^5 pps
target n°4. CH2 104 µm
All triggers, (no LISE)
Divisions (Unchanged) CATS1 3. 10**4. PPT 3000 ; EXL 10**4

Comments:
  • We realized that the pulser frequency for dead time measurement changed from 100 Hz to 50 Hz a few runs ago. It is not clear if someone changed it during an intervention in D6.
Pinnede748 Thu Jul 6 02:41:13 2017 Freddy and the night shiftersCHIOGeneral CHIO analog treatment
Interestingly, the bipolar output of the amplifier of the CHIO sent (and splitted) to check correlation on the channel 15 of the ADC CHIO (or on channel 29 of the ADC MUST2) provides a much better resolution (about 10%) than the one obtained using the unipolar output that we were looking since then (about 20% resolution).

This can be understood by the fact that the bipolar signal from the spectroscopic amplifier filters the baseline fluctuation by deriving the unipolar signal.
On the attached PID plot, it is easy to see the improvment. On the other hand, the beam spot extends also at lower channels and covers part of the other lines.
Since the unipolar signal will have some negative part (undershoot), it is possible for pile-up signals to arrive on top of this negative part and end up with lower energy.

With numexo, the energies extracted from the digitized signals, this undershoot issue is not visible.
Fixede738 Mon Jul 9 19:24:06 2018 Freddy Valérie LouisRUNGeneralCryo-LH2RUN 317
Run 317

start: 19h08 stop: 19h30
Beam: 9C
target: filled

Trigger: T1 to T8, CATS1%3*104, CATS2%3*10⁴;, PLASTIC%1*10⁴

I=1.8*10pps in CATS1
Purity = 5.1%
Fixede755 Wed Jun 27 01:34:28 2018 Freddy LouisRUNGeneralCryo-LH2run153
RUN 153

started @ 1h26 stopped at 3h20

beam was back at 60000pps with still vacuum troubles in C0.
beam is shifted in Y position compared to previous condition.
Fixede755 Wed Jun 27 03:29:32 2018 Freddy LouisRUNGeneralCryo-LH2RUN 154
RUN 154
started @ 3h21 stopped @ 5h16

I=8.10**4pps ==> large fluctuation from few 10**3 to several 10**5
Fluctuation due to variations of the high voltage of the grouper of the source. Beam was misaligned and attenuated in pipes.
Come back to stable 3*10**5pps at 4h10
Fixede755 Wed Jun 27 05:20:22 2018 Freddy LouisRUNGeneralCryo-LH2RUN 155
RUN 155
started @ 5h16
stoppd at 7h19

beam come back to normal condition
Fixede755 Wed Jun 27 07:23:41 2018 Freddy LouisRUNGeneralCryo-LH2RUN 156
RUN 156
start at 7h17

Target filled, stable beam of 38Ca at 2.2*10**5pps
last run in 38Ca on filled target before evaporate LH2
Fixede738 Mon Jul 9 19:16:13 2018 Freddy LouisRUNGeneralCryo-LH2RUN 313 to 316
From RUN 313 to RUN 316:

Tuning dor the Drift Chamber:
  • threshold changed
  • CFD discriminator has been tuned in GECO
  • Buffer size has been change to match with the new setting

DC now works as well as th online visualisation
Acquisition is stable
Fixede748 Fri Jun 30 11:09:59 2017 FreddyOFFLINEGeneral Analysis of DSSD Energy Calibration - alpha source
We made a calibration with the last alpha source runs:
-run 19 for T1-2-3-4
-run 29 for T5 and T8
-run 31 for T6 and T7

Here are some plots of the analysed runs using this calibration.
In general one can see that telescope 2 has the worst resolution, has an EX energy shifted. It is also the detector with the largest (increasing) leakage current. It has to be investigated in more details...

Calibration summary for each detector can be found in:
/home/e748/analysis/nptool/Projects/e748/Calibration/Energy/Calibration/Juin16_CalE
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