 Thu Mar 2 11:17:54 2023, BS, Runs, , , Run 29 stopped
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We will change the trigger and we stopped the run number 29 |
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Thu Mar 2 17:28:21 2023, BS, Runs, , , Run 33 Started
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Run 33 Started
Plunger Run : 48
Supposed Distance = 10 um
position of the target = 10 um
micrometer = 6.5 um
Voltage = 7.957 V
Plunger off set 60 um
Which means we are running 60 um + 10 um (read from position window of plunger) = 70 um.
20:50 Observed beam dropped by a factor of 2 (1.5 enA on the beam dump). Asked the operator to improve beam.
run stop 22:53 acquisition problem |
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Fri Mar 3 00:09:19 2023, MP, AT, Runs, , , run 35
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Started after beam current was reduced by a factor of 2
plunger run # 116
Earlier: CUP#6 100 enA
Now: CUP#6 50eNA
Beam dump 1.8 enA
Collimator 0.8 enA
The operator is asked to keep the beam dump current not larger than the present value.
Supposed Distance = 10 um
position of the target = 10 um
micrometer = 11.7 um
Voltage = 7.9 V
Plunger off set 60 um
Which means we are running 60 um + 10 um (read from position window of plunger) = 70 um.
Observed that detectors at theta 143 degrees count most. Is this because they see beam dump? |
Fri Mar 3 13:43:56 2023, IP. KWL, Runs, , , 511 annihilation and 279 Au lines in Ge rings 
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The counting rate in 511 keV line for sum of the Ge detectors placed at 101, 117 and 143 degrees (with approved ACS). The largest intensity is visible for Ge at 143 degrees, lowest for 101 deg.
=============================== RING 101
Integration in spectrum user_ge_ring101_acceptedACS_clone.spc
RESULT : 3895
=============================== RING 117
Integration in spectrum user_ge_ring117_acceptedACS.spc
RESULT : 9392
=============================== RING 143
Integration in spectrum user_ge_ring143_acceptedACS.spc
RESULT : 15767
The Coulex of 197Au (279.5 keV ) line is visible in all rings with a comparable intensity:
=============================== RING 101
Integration in spectrum user_ge_ring101_acceptedACS_clone.spc
RESULT : 12491
=============================== RING 117
Integration in spectrum user_ge_ring117_acceptedACS.spc
RESULT : 11443
===============================RING 143
Integration in spectrum user_ge_ring143_acceptedACS.spc
RESULT : 10460
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Sun Mar 5 22:32:56 2023, MP, Other, , , change of the target 6x
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See pictures in the attachment:
1) stopper seen from the back (upstream view)
2) stopper seen from the front (downstream view)
Mind the two small off-center dots. It is clear that the beam hits the edge of the frame. This is possible because the 5 mm collimator has two small dots outside the 5 mm hole (the collimator can be seen in the beam tube).
3) old target, upstream view
4) new target, upstream view, after the stopper drove into it
5) new target, before it was mounted
6) the stopper, after the collision with the target. One of the visible rings is probably due to this collision, other traces probably reflect its complicated history earlier.
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Sat Mar 11 09:29:48 2023, EG, Other, , , current exeriment parameters as requested in the manual for shifters
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41_ge_single_theta 101,117,143 looks ok. No peakdeformation of 511, other gammas FWHM around half of that of511 - ok
ch4 in total rate EAGLE_0 arouns 2.1 kHz - ok
planger tollerace limits (green and blue horizontal markers) set far of the current distance, intantionally?
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Sat Mar 11 10:46:37 2023, EG, Other, Beam intensity, ,
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ch4 in total rate EGALE_) reached 2.4 kHz, beam intensity has been reduced to fit the required 2kHz.
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Sat Mar 11 11:39:55 2023, EG, Problems, , , Buffers clearing
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at 11:34:50 sek on 11 march a spike in counting rate of some Ge detectors is observed. Buffers not cleared properly?
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Sat Mar 11 12:42:42 2023, EG, Other, , , Beam intensity reduction
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Again beam intensity gradually increased reaching 2.4 kHz ontotal rate EAGLE_0 ch4. Beam intensity reduction requested. 1.8 kHz on ch4 after reduction. |
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Sat Mar 11 14:15:55 2023, EG, Runs, , , Beam intensity rapid increase
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14:12 beam intensity instability. Rapid increase of beam intensity - twice the previous value. Returned to normal after 4 minutes. |
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Sat Mar 11 14:42:28 2023, EG, Runs, , , Beam instabilities
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Large beam intensity instabilities from 14:10 till 14:40. Beam intensity reduction requested. CH4 on Total rate EAGLE_0 returned to 1.9kHz. Intensity became stable.
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Sat Mar 11 15:16:31 2023, EG, Other, , , Beam intensity reduced again
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Again beam intensity to high. Reduced to 2 kHz on ch4 GE |
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Sun Mar 12 09:15:00 2023, EG, Other, , , Array_monitors mat refresh synchronization
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Beam stable, counting rate within limits, plunger distance within the given tollerance, gamma spectra ok, everything looks good but....
(yes there must be some "but"), refreshing of EAGLE_array_monitor.mat and NEDA_array_monitor.mat are out of sync. Mostly pure red colour is dysplayed. Not very usefull and (I suppose) missleading information.
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Sun Mar 12 13:20:00 2023, EG, Problems, , , No Data
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For a split second a red "NO DATA" notification appeared in the top right corner of Counting rates dashboard.
It looks like it did not change anything in data collection.
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Sun Mar 12 20:55:08 2023, MP, Runs, , , runc62 152 for efficiency calibration
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started
source in the target position, as precisely as possible
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Mon Mar 13 12:15:35 2023, MP, Other, , , measurement of radioactivity along the beam line
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At about 12:00, 13/03/2023 (about 17 hours after the beam was stopped), a measurement of activity of the beam line was performed using FH 40G-L10 meter.
Radioctivity run 65 stopped before the measurement, radioactivity run 66 started after the measurement
Background level 120 ns/h
Target, stopper, the forward half of the target chamber - dismounted.
Approximate distance from the target position (upstream), approximate activity
10 cm 500 ns/h
25 cm 420 ns/h
35 350 ns/h
40 350 ns/h
50 200 ns/h
75 170 ns/h
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Mon Mar 13 12:16:31 2023, MP, Other, , , run 66
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run 66 started, radiocativity (background)
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Mon Mar 13 15:16:21 2023, MP, Other, , , list of files copied to Bahadir's disks
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Attached are the lists of files copied to the two 4 TB Bahadir's disks.
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Thu Mar 16 12:13:11 2023, MP, Other, , , test of radioactivity
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16/03/2023
Plunger chamber closed, some dummy target and stopper probably inside
run 72 eagle closed
run 73 right half of EAGLE completely opened
Three screenshots are attached:
Run 72 EAGLE closed
1) Three rings. There is significantly more 511 in ring 143 than in 117, 101
2) 5 detectors of ring 143. They all look similar to each other.
Run 73 right half of EAGLE opened
3) 5 detectors of ring 143. The 3 detectors in the opened half hardly see 511 keV, the other 2 do.
Check with Colibri and a gamma scintillator probe ws done: largest activity is visible close to the target chamber, in the region starting at the edge of the chamber, end ending about 6 cm upstream.
About 80 gamma counts/s are seen there. The count rate decreases further upstream.
Background rate: 20 to 30 counts/s, 25 counts/s in Sala Fizykow.
Radioactivity line seen in the spectra, with the same behaviour as 511: 743.5, 936 keV, 1434 keV. These are lines from 52Cr, fed by beta+ decay of 52Mn.
Confirmed by Michain gamma-gamma.
52Mn can be produced in the a2pn channel in the reaction 32S+27Al
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Mon Mar 20 04:55:24 2023, MP, Other, , , missing caendat.bz2 on Bahadir's disk
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The following caendat.bz2 files were not copied to Bahadir's disks
(because they were not bzipped at the time of the copying):
run_0031_02-03-2023_16h04m28s
-rw-rw-r-- 1 xdaq xdaq 4294971272 Mar 2 16:15 needleRU_i31_0031_0000.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 769385912 Mar 2 16:17 needleRU_i31_0031_0001.caendat.bz2
run_0055_11-03-2023_00h33m38s
-rw-rw-r-- 1 xdaq xdaq 4294970584 Mar 11 20:09 needleRU_i55_0055_0124.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294974732 Mar 11 20:23 needleRU_i55_0055_0125.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294968200 Mar 11 20:33 needleRU_i55_0055_0126.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294969064 Mar 11 20:44 needleRU_i55_0055_0127.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967332 Mar 11 20:56 needleRU_i55_0055_0128.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967976 Mar 11 21:10 needleRU_i55_0055_0129.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294984456 Mar 11 21:21 needleRU_i55_0055_0130.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294973384 Mar 11 21:31 needleRU_i55_0055_0131.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967428 Mar 11 21:42 needleRU_i55_0055_0132.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294968276 Mar 11 21:56 needleRU_i55_0055_0133.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967576 Mar 11 22:10 needleRU_i55_0055_0134.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294983724 Mar 11 22:26 needleRU_i55_0055_0135.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967932 Mar 11 22:39 needleRU_i55_0055_0136.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967564 Mar 11 22:55 needleRU_i55_0055_0137.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294971848 Mar 11 23:05 needleRU_i55_0055_0138.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4046574036 Mar 11 23:14 needleRU_i55_0055_0139.caendat.bz2
run_0058_12-03-2023_04h16m42s
-rw-rw-r-- 1 xdaq xdaq 4295004684 Mar 12 17:25 needleRU_i58_0058_0085.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4295011036 Mar 12 17:33 needleRU_i58_0058_0086.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4295019340 Mar 12 17:42 needleRU_i58_0058_0087.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294975440 Mar 12 17:50 needleRU_i58_0058_0088.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294968176 Mar 12 17:59 needleRU_i58_0058_0089.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294968016 Mar 12 18:09 needleRU_i58_0058_0090.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294968836 Mar 12 18:18 needleRU_i58_0058_0091.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294993728 Mar 12 18:27 needleRU_i58_0058_0092.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4294967436 Mar 12 18:36 needleRU_i58_0058_0093.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 4295074884 Mar 12 18:46 needleRU_i58_0058_0094.caendat.bz2
-rw-rw-r-- 1 xdaq xdaq 3480562784 Mar 12 18:54 needleRU_i58_0058_0095.caendat.bz2
These files were bzipped only on 20/03/2023 |
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