ID |
Date |
Author |
Type |
test |
Category |
Subject |
|
64
|
Fri Mar 3 23:38:28 2023 |
SP | Runs | | General | How different Ge count |
All germanium detecors look reasonable, as attached. |
|
63
|
Fri Mar 3 20:50:31 2023 |
IK, MP, GJ | Other | | Data analysis | Ge spectra |
Ge rates increasing, similar to what it was 24h before. Asking to decrease beam intensity by a factor of 2.
Attached Ge spectra before decreasing.
Before decreas beam current was 1.75enA, afterwards 1.1enA. |
|
62
|
Fri Mar 3 19:41:27 2023 |
IK | Problems | | Hardware | Beamdump readout issue Vol.2. |
Issue described in #61 continues to persist.
Beam stopped from 19:20 to 19:32, run 36 ongoing; MP, GJ, BS entering the experimental hall.
They changed the position of the grounding point on the chamber, moving it downstream after a fitting/joining part (A to B on the attached picture [artist: GJ]).
|
|
61
|
Fri Mar 3 17:52:41 2023 |
IK | Problem Fixed | | Hardware | Beamdump readout issue - solved |
Current readout issues from beamdump. Beam stopped from 17:46-17:52, run 36 ongoing.
MP & GJ checking the grounding and connection the beamdump readout. No visible issue found in the exp hall, but copper grounding wire was tightened, which seemingly resolved the issue (stability of beamdump readout). |
|
60
|
Fri Mar 3 16:47:29 2023 |
IK | Runs | | General | Run 36 started |
Run 36 Started
New Beam energy is 150 MeV
The beam dumb currennt is 2.5 enA.
Plunger run = 282
|
|
59
|
Fri Mar 3 15:04:33 2023 |
KWL | Other | | General | run 35 stopped |
Run 35 stopped. An attempt to check if we can get 5 MeV higher beam energy. |
|
58
|
Fri Mar 3 14:22:12 2023 |
IP | Runs | | General | |
the beam comes back. The run 35 is still going.
plunger run # 257
Beam dump .... enA (given by operators) * 7 (following entry ID#39) = ... enA
Collimator .... enA
Run Data = /onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0059.caendat
RU : 6.18 MB/s
LF : 8.44 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 8.8 um
Voltage = 7.94 V
|
|
57
|
Fri Mar 3 13:54:41 2023 |
IP. KWL | Runs | | General | beam energy measurement |
beam stop due to the beam energy measurement
The beam energy: ~145 MeV |
|
56
|
Fri Mar 3 13:43:56 2023 |
IP. KWL | Runs | | | 511 annihilation and 279 Au lines in Ge rings |
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
|
|
55
|
Fri Mar 3 12:11:24 2023 |
IP | Runs | | General | |
the beam comes back. |
|
54
|
Fri Mar 3 11:48:29 2023 |
IP | Runs | | General | beam stopped |
The beam is gone. |
|
53
|
Fri Mar 3 11:37:25 2023 |
IP | Runs | | General | |
plunger run # 230
Beam dump 1.2 enA (given by operators) * 7 (following entry ID#39) = 8.4 enA
Collimator 0.6 enA
Run Data =/onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0047.caendat
RU : 5.88 MB/s
LF : 8.35 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 8.8 um
Voltage = 7.94 V |
|
52
|
Fri Mar 3 10:21:18 2023 |
IP. KWL | Runs | | General | beam intensity back to 1.25 enA at the beam dump |
we increased beam intensity to 1.25 enA (readout at the beam dump) |
|
51
|
Fri Mar 3 10:09:20 2023 |
IP. KWL | Runs | | General | beam intensity decreased to 0.3 enA (at beam dump) on our request |
// we noticed yesterday that GE at 143 degrees counts more than those placed at 117 and 101. The 511 keV line (+ background) is much more pronounced for Ge at 143 degrees. To investigate this issue we decreased the beam intensity to 0.3 enA ( value given by operators at the beam dump ).
Conclusion - decrease of the beam intensity does not explain above observations (se attached figs)
plunger run # 216
Beam dump 0.3 enA (given by operators) * 7 (following entry ID#39) = 2.1 enA
Collimator enA
Run Data =/onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0040.caendat
RU : 2.15 MB/s
LF : 5.60 MB/s
Supposed Distance = 10 um
position of the target = 10.6 um
micrometer = 8.8 um
Voltage = 7.8 V |
|
50
|
Fri Mar 3 09:30:15 2023 |
IP. KWL | Runs | | General | |
plunger run # 208
Beam dump 0.75 enA (given by operators) * 7 (following entry ID#39) = 5.25 enA
Collimator 0.75 enA
Run Data =/onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0037.caendat
RU : 3.85 MB/s
LF : 7,29 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 9.3 um
Voltage = 7.93 V |
|
49
|
Fri Mar 3 08:20:13 2023 |
KWL | Runs | | General | |
plunger run # 196
Beam dump 1 enA (given by operators) * 7 (following entry ID#39) = 7 enA
Collimator 0.75 enA
Run Data =/onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0033.caendat
RU : 4.10 MB/s
LF : 7.48 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 9 um
Voltage = 7.94 V |
|
48
|
Fri Mar 3 07:32:28 2023 |
OST | Runs | | General | |
plunger run # 188
Beam dump 2.5 enA
Collimator 0.8 enA
Run Data = /onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0030.caendat
RU : 4.15 MB/s
LF : 7.69 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 9 um
Voltage = 8.964 V
Readout data decreased 5 mb/s to 4 mb/s during 6:30 to 7:30 am. slowly returning to normal value
|
|
47
|
Fri Mar 3 06:24:03 2023 |
OST | Runs | | General | |
plunger run # 178
Beam dump 2.5 enA
Collimator 0.9 enA
Run Data =/onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0027.caendat
RU : 4.65 MB/s
LF : 7.52 MB/s
Supposed Distance = 10 um
position of the target = 10.1 um
micrometer = 8.7 um
Voltage = 7.97 V
nothing has changed. the situation is stable. |
|
46
|
Fri Mar 3 05:18:35 2023 |
OST | Runs | | General | |
plunger run # 167
Beam dump 2.5 enA
Collimator 1.0 enA
Run Data =/onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0022.caendat
RU : 4.90 MB/s
LF : 8.01 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 8.8 um
Voltage = 7.941 V
nothing has changed. the situation is stable. |
|
45
|
Fri Mar 3 04:15:32 2023 |
mgb | Runs | | General | |
plunger run # 157
Beam dump 2.5 enA
Collimator 1.0 enA
Run Data = /onlineNEDA_00/xData/hil099/run_0035_03-03-2023_00h04m26s/needleRU_i35_0035_0018.caendat
RU : 4.79 MB/s
LF : 7.69 MB/s
Supposed Distance = 10 um
position of the target = 10.2 um
micrometer = 8.9 um
Voltage = 7.94 V
Plunger off set 60 um
Which means we are running 60 um + 10 um (read from position window of plunger) = 70 um. |