ID |
Date |
Author |
Category |
Subject |
Year |
|
41
|
Sun Mar 15 09:42:40 2020 |
Jan | Calibration | run030 - Xray90 calib Am241 | |
measurement with old tennelec specAmps, do not use for efficiency!
Detector: 90
Source: Am-241
Distance: 167.5mm
Start time: 13:06:55 15.03.2020
Stop time: 13:24:57 15.03.2020
file name: run030_xxxx.lmd
avrg. rate: 650Hz
dead-time: 7% |
|
42
|
Sun Mar 15 13:08:38 2020 |
Jan | Calibration | run031 - Xray90 calib Ba133 hi-rate | |
measurement with old tennelec specAmps, do not use for efficiency!
Detector: 90
Source: Ba-133 strong source
Distance: 167.5mm
Start time: 13:28:42 15.03.2020
Stop time:13:38:16 15.03.2020
file name: run031_xxxx.lmd
avrg. rate: 2.7kHz
dead-time: 25% |
|
43
|
Sun Mar 15 13:40:11 2020 |
Jan | Calibration | run032 - Xray90 calib Ba133 | |
measurement with old tennelec specAmps, do not use for efficiency!
Detector: 90
Source: Ba-133 weak source
Distance: 167.5mm
Start time: 13:39:30 15.03.2020
Stop time: 13:50:55 15.03.2020
file name: run032_xxxx.lmd
avrg. rate: 150Hz
dead-time: 1.5% |
|
44
|
Sun Mar 15 13:52:05 2020 |
Jan | Calibration | run033 - Xray145 calib Am241 | |
measurement with old tennelec specAmps, do not use for efficiency!
Detector: 145
Source: Am-241
Distance: 305mm
Start time: 14:15;56 15.03.2020
Stop time: 14:40:21 15.03.2020
file name: run033_xxxx.lmd
avrg. rate: 300Hz
dead-time: 4% |
|
45
|
Sun Mar 15 14:41:34 2020 |
Jan | Calibration | run034 - Xray145 calib B133 high rate -SOURCE MOVED! | |
measurement with old tennelec specAmps, do not use for efficiency!
The source moved during the calibration, measurement stopped at half time.
Detector: 145
Source: B133 high rate
Distance: 305mm
Start time: 14:54:47 15.03.2020
Stop time: 15:06:53 15.03.2020
file name: run034_xxxx.lmd
avrg. rate: 1kHz
dead-time: 11% |
|
46
|
Sun Mar 15 15:08:44 2020 |
Jan | Calibration | run035 - Xray145 calib B133 high rate | |
measurement with old tennelec specAmps, do not use for efficiency!
Detector: 145
Source: B133 high rate
Distance: 305mm
Start time: 15:10:15 15.03.2020
Stop time: 15:31:16 15.03.2020
file name: run035_xxxx.lmd
avrg. rate: 1kHz
dead-time: 12% |
|
47
|
Sun Mar 15 17:12:40 2020 |
Laszlo, Jan | Detectors | new Ortec spec amps | |
We are now using new SpecAmps for the x-ray detectors from ORTEC, they deliver much improved resolution but have other strange effects as discribed in the next entry. |
|
48
|
Sun Mar 15 17:13:21 2020 |
Laszlo, Jan | Calibration | the x-ray gate issue | |
We found a strange behaviour of our ADC gates for the x-ray detectors.
The setting as shown in the foto below corresponds to a delay of 5 us and a gate length of 15 us.
This is the only setting that produces nice spectra, even though the signals and gate are not aligned.
The setting is extremely sensitive to the delay 4 us still works but 3 or 7 us give already reduced energy values and beyond these values the spectra disapears.
For now it was decided to operate with this not-understood settings because the result is pretty good...
However, further investigation to understand whats happening would be desirable.
Additional note:
This effect appeared after using the new ortec SpecAmps. Before this we used old Tennelec Amps which delivered horrible resolution, but the gates and signals could be matched as expected at this time. |
| Attachment 1: IMG_20200315_172129.jpg
|
|
|
49
|
Sun Mar 15 17:14:08 2020 |
Laszlo | Calibration | run036 - Xray90 calib Am241, distance 200! | |
Detector: 90
Source: Am241
Distance: 200mm
Start time: 17:15:12 15.03.2020
Stop time: 17:32:17 15.03.2020
file name: run036_xxxx.lmd
avrg. rate: 450Hz
dead-time: 5% |
|
50
|
Sun Mar 15 17:33:17 2020 |
Laszlo | Calibration | run037 - Xray90 calib Am241 | |
Detector: 90
Source: Am241
Distance: 167.5mm
Start time: 17:40:00 15.03.2020
Stop time: 17:49:57 15.03.2020
file name: run037_xxxx.lmd
avrg. rate: 620Hz
dead-time: 7%
--------------------
update at 05.05.2020: the cables were probably twisted between the 90 and the 145 angle detectors. |
| Attachment 1: run037_241Am_145.png
|
|
|
51
|
Sun Mar 15 17:50:42 2020 |
Laszlo | Calibration | run038 - Xray90 calib Ba133, high rate | |
Detector: 90
Source: Ba133 - high rate
Distance: 167.5mm
Start time: 17:53:38 15.03.2020
Stop time: 18:05:41 15.03.2020
file name: run038_xxxx.lmd
avrg. rate: 2.6kHz
dead-time: 26%
--------------------
update at 05.05.2020: the cables were probably twisted between the 90 and the 145 angle detectors. |
| Attachment 1: run038_133Ba_high_145.png
|
|
|
52
|
Sun Mar 15 18:09:19 2020 |
Laszlo | Calibration | run039 - Xray90 calib Ba133 | |
Detector: 90
Source: Ba133
Distance: 167.5mm
Start time: 18:10:02 15.03.2020
Stop time: 18:47:36 15.03.2020
file name: run039_xxxx.lmd
avrg. rate: 150Hz
dead-time: 2% |
|
53
|
Sun Mar 15 18:53:42 2020 |
Laszlo | Calibration | run040 - Xray145 calib Am241 | |
Detector: 145
Source: Am241
Distance: 305mm
Start time: 18:53:16 15.03.2020
Stop time: 19:18:35 15.03.2020
file name: run040_xxxx.lmd
avrg. rate: 230Hz
dead-time: 3%
--------------------
update at 05.05.2020: the cables were probably twisted between the 90 and the 145 angle detectors. |
| Attachment 1: run040_241Am_90.png
|
|
|
54
|
Sun Mar 15 19:22:58 2020 |
Laszlo | Calibration | run041 - Xray145 calib Ba133 - high rate | |
Detector: 145
Source: Ba133
Distance: 305mm
Start time: 19:22:34 15.03.2020
Stop time: 19:38:44 15.03.2020
file name: run041_xxxx.lmd
avrg. rate: 1kHz
dead-time: 11%
--------------------
update at 05.05.2020: the cables were probably twisted between the 90 and the 145 angle detectors. |
| Attachment 1: run041_133Ba_high_90.png
|
|
|
55
|
Sun Mar 15 19:46:34 2020 |
Laszlo | Calibration | run042 - Xray35 calib Ba133 - high rate | |
Detector: 35
Source: Ba133, strong source
Distance: 334mm
Start time: 19:46:54 15.03.2020
Stop time: 20:20:14 15.03.2020
file name: run042_xxxx.lmd
avrg. rate: 60Hz
dead-time: 1% |
|
56
|
Sun Mar 15 20:26:08 2020 |
Laszlo | Calibration | run043 - Xray35 calib Am241 | |
Detector: 35
Source: Am241
Distance: 334mm
Start time: 20:25:48 15.03.2020
Stop time: 20:56:56 15.03.2020
file name: run043_xxxx.lmd
avrg. rate: 20Hz
dead-time: ~0%
--------------------
update at 05.05.2020: the cables were probably twisted between the 90 and the 145 angle detectors. |
| Attachment 1: run043_241Am_35.png
|
|
|
58
|
Sun Mar 15 21:01:23 2020 |
Laszlo | Calibration | run044 - Xray35 calib Ba133 - a night long run | |
Detector: 35
Source: Ba133
Distance: 334mm
Start time: 21:01:26 15.03.2020
Stop time: 7:11:07 16.03.2020
file name: run044_xxxx.lmd
avrg. rate: 60Hz
dead-time: 1-2%
--------------------
update at 05.04.2020: the cables were probably twisted between the 90 and the 145 angle detectors. However, the id of the detector doesnt change, since there were no simultanious measurements (one source used with one detector a detector at a time) |
| Attachment 1: run044_133Ba_high_35.png
|
|
|
59
|
Mon Mar 16 15:15:22 2020 |
Jan | Calibration | Gamma- and X-ray intensities for efficiency calib | |
Intensities for special gamma or x-ray lines needed for efficiency calibration can be found here:
ENSDF
https://www.nndc.bnl.gov/ensdf/#
NUDAT
https://www.nndc.bnl.gov/nudat2/
An old but still usefull data base:
http://nucleardata.nuclear.lu.se/toi/nucSearch.asp |
|
60
|
Tue Mar 17 08:15:49 2020 |
Jan | General | current grids & screen in TE | |
measured beam diagnosis with 124Xe48+ at 326 MeV/u |
| Attachment 1: 2020-03-16_18-51-50-170.png
|
|
| Attachment 2: IMG_0694.jpg
|
|
|
61
|
Tue Mar 17 11:44:58 2020 |
Jan | Runs | run entry - template | |
beam: 118Te52+
energy: 7.4 MeV/u
purpose: data with TARGET ON
Detector position (Si): xxx mm
run start at 14:21 , first file: run0xx_0001.lmd
run stop at 17:11 , last file: run088_0178.lmd
_______________________________________________________________________________
time: 14:45
ON Rates
Si_X: 29 Hz
Si_Y: 31 Hz
Xray_35: 592 Hz
Xray_90: 168 Hz
Xray_145: xx Hz
BaF_OR: xx Hz
Si voltage: x.x V
Si leakage current: x.x uA
SIS particles before: 5e9
ESR particles at injection: 1e6
ESR particles after decel.: 1e5
Target ON density: 5.5e13
copy and repeat the above (below the line) every 30 minutes |