| ID |
Date |
Author |
Category |
Subject |
Year |
|
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% |
|
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
|
|
|
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
|
|
|
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% |
|
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
|
|
|
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. |
|
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% |
|
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% |
|
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% |
|
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% |
|
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% |
|
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% |
|
40
|
Wed Mar 11 14:33:44 2020 |
Laszlo | General | beam time manual | |
Here you can find the digital version of the E127 beam time manual. |
| Attachment 1: E127_experimental_manual.pdf
|
|
| Attachment 2: manual.odt
|
|
39
|
Wed Mar 11 09:08:21 2020 |
Jan | DAQ | DAQ & controls - OVERVIEW | |
For all DAQ & slow control buissines the user
litv-exp
is used with the password ViValasVegas1964
Here is a list of computers and devices we use for the current DAQ:
- r4l-58 - VME cpu (RIO)
our DAQ runs on this computer
access from lxg1275 via ssh litv-exp@r4l-58
the current DAQ directory is /esr/usr/litv-exp/2020_e127/r4l-58
from lxg-machines the DAQ dir can also be accessed via the mount point at /lynx/Lynx/esr/usr/litv-exp/2020_e127/r4l-58
- lxg1275 - main DAQ handler
used for communication with the DAQ and primary data writing/streaming
access from any lxg via ssh litv-exp@lxg1275
primary data folder: /data.local3/e127/lmd/
local backup folder: /data.local2/e127/lmd_backup/
- lxg1299 - online monitoring
used for the R3Broot online monitor server
access from any lxg via ssh litv-exp@lxg1299
online data: /data.local3/e127/online/
- atpnu004 - slow control
used for remote access to SpecAmps (MesyTec Shapers), Si-HV (caen) and picoscopes
access from any lxg via E127_nuc or ssh litv-exp@atpnuc004
screen sessions: mesy_ioc (shapers), caen_ioc (Si HV)
access screens by screen -x mesy_ioc or screen -x caen_ioc (exit with [Ctrl-a d])
access vnc session for picoscopes on any lxg: E127_vnc or vncviewer atpnuc004:1
- apraspi001 - slow control 2
used for remote access to the BaF HV crate
access from any lxg via ssh litv-exp@apraspi001
local access to HV control by telnet: telnet 169.254.93.160 1527
- lxg0188 - 1st backup node
used for direct backup of the written data (invoked automatically by stopping a run)
backup dir: /data.local2/E127_lmd/
- kronos.hpc.gsi.de - 2nd backup node
used for secondary backup of lmd-data on lxg0188 (chronjob every 4 hours)
backup dir: /lustre/ap/litv-exp/2020-03-17_E127_jglorius
List of commands and aliases
- E127_daq or /data.local1/e127/scripts/E127_start_gui.sh
this is the GUI to control the DAQ
available on lxg1275 only with litv-exp user
only one instance of this GUI can run at the same time!
- E127_unpack or /u/litv-exp/unpacker/unpackexps/e127/e127
this is the unpacker for the current DAQ
available on any lxg with litv-exp user
to unpack lmd-files to root-file: E127_unpack infile01.lmd infile02.lmd --ntuple=RAW,outfile.root
- E127_epics or epicsfind; medm -x /u/litv-exp/e127/medm/e127.adl
this is the GUI for slow control of Si HV and amplifiers (MesyTec Shapers)
available on any lxg with litv-exp user
- E127_rates or /u/litv-exp/e127/UDP/build_cc_x86_64-linux-gnu_4.9.2_debug/udp_reader --trig --rate
this is the UDP reader for detector and trigger rates
available on lxg1275 only with litv-exp user
|
|
38
|
Tue Mar 10 09:41:26 2020 |
Jan | Detectors | x-ray background from BaF | |
The BaF2 detectors planned to be installed at the target induce an additional background in the x-ray detectors sitting below inside the target chamber.
We made test measurements with an x-ray detector for estimating the background in the region of interest for our K-REC measurements (35 to 50 keV).
For the interval [35-50 keV]:
Normal background level: 0.065 (s*keV)^-1
BaF2 in 5cm distance: 0.078 (s*keV)^-1
This is an increase by about 22%
Assuming an increase by 100% induced by 6 BaF2 in the vincinity of the Ge-detectors this seems acceptable.
However additional BaF-induced peaks are also visible at ~30 keV and ~60 keV. While these are not in the region of interest for the K-REC, we need to be aware of them!
spectra are available on the Frankfurt exp-astro Server at /home/glorius/e127/ |
|
37
|
Tue Mar 10 08:52:34 2020 |
Jan | Detectors | DSSSD positioning | |
To find a good Si position, we need to follow a procedure similar to this:
1. Si in max-in position
2. find distance of beam by scraping with detector from inside
--> zero position
3. from this zero, we need to set a distance of about 1.5 cm to the inside (as shown in the sketch below)
It is likely that this position is not compatible with the complete ESR cycle (e.g. we scrape beam with det. during deceleration).
The solution is to move the beam closer to the detector after deceleration. There are two feasible methods to do this:
A. make a local bump in the dipole
--> check new zero and det. position again, as sketched above
--> in 2016 this method didn't allow to go close enough to the detector, eventually we used:
B. global orbit change (by magnet ramp) + target bump (to keep overlap)
--> this takes a bit more time to set up and also the cycle will be longer at low energies (critical due to life-time)
--> method A is preferred, but might not be strong enough
This needs to be checked and repeated for each new beam setting. |
| Attachment 1: optimum_detector_position_2.jpg
|
|
|
36
|
Fri Feb 21 11:29:59 2020 |
Jan | Detectors | det. distances at target chamber | |
This is the lookup table for the distance of each x-ray detector to the target.
See attched foto for explanation.
|
Detector | A (dA) [mm] | B (dB) [mm] | C (dC) [mm] | calculate | result [mm]
| |
35° | 136.0 (1.0) | 20.0 (0.2) | 450.0 (0.5) | C + B - A | 334.0 (?)
| |
90° | 76.0 (0.5) | 20.0 (0.2) | 447.0/2 = 223.5 (1.0) | C + B - A | 167.5 (?)
| |
145° | 165.0 (1.0) | 20.0 (0.2) | 450.0 (0.5) | C + B - A | 305.0 (?)
|
Errors are estimated after measurement, final errorbars have to be double checked! |
| Attachment 1: Photonen_Kammer.png
|
|
|
35
|
Fri Feb 21 11:29:02 2020 |
Laszlo | General | Shift plan | |
https://docs.google.com/spreadsheets/d/14m8WcCq1erx6HqWJRK7TLbCx121IkjqGa5l-frf4YjI/edit#gid=0 |
|
34
|
Fri Feb 21 09:39:40 2020 |
Laszlo | DAQ | cable documentation | |
|
| Attachment 1: cable_documentation_e127.pdf
|
|
| Attachment 2: cable_documentation_e127.ods
|
|
33
|
Mon Feb 17 08:14:44 2020 |
Jan | Simulations | 118Te K-REC X-ray energies | |
X-ray energies of K-REC for 118Te according to
http://www-ap.gsi.de/Thomas/ap_html_research/energy/index.php
|
parameters | 35 deg | 90 deg | 145 deg
| |
8 MeV/u | 47.29 keV | 42.25 keV | 38.17 keV
| |
5 MeV/u | 44.51 keV | 40.74 keV | 37.57 keV
|
Full results are attached |
| Attachment 1: Photonen_Kammer.png
|
|
| Attachment 2: x-ray_calculator.txt
|
##################
8 MeV/U - 90 deg
******************* KINEMATICS ****** *****************
ZPROJ..........................:= 52.
THETA..........................:= 90.
EKIN(MeV/U)....................:= 8.
KINETIC ELECTRON ENERGY (keV)..:= 4.38864217
V (A.U.).......................:= 17.8451164
BETA...........................:= 0.130222112
GAMMA..........................:= 1.00858828
DOPPLER SHIFT..................:= 0.991491303
SOLID ANGLE TR LAB/CM..........:= 0.983055003
EMISSION ANGLE IN EMITTER-FRAME:= 97.4826901
******************* ENERGIES IN KEV ****** ************
ETA...(v/Zp)^2.................:= 0.117769298
ETA..(ENERGY)..................:= 0.114827573
EK(BIND).......................:= 38.2193878
EL(BIND).......................:= 9.28182715
EM(BIND).......................:= 4.10427342
K-ALPHA (LAB.).................:= 28.6913397
K-BETA (LAB.).................:= 33.8248391
L-ALPHA (LAB.).................:= 5.13349949
KINETIC ELEC. ENERGY (LAB.)....:= 4.35130054
E K-REC (LAB)..................:= 42.2454911
E L-REC (LAB)..................:= 13.5541514
E M-REC (LAB)..................:= 8.42065194
##################
8 MeV/U - 35 deg
******************* KINEMATICS ****** *****************
ZPROJ..........................:= 52.
THETA..........................:= 35.
EKIN(MeV/U)....................:= 8.
KINETIC ELECTRON ENERGY (keV)..:= 4.38864217
V (A.U.).......................:= 17.8451164
BETA...........................:= 0.130222112
GAMMA..........................:= 1.00858828
DOPPLER SHIFT..................:= 1.10987917
SOLID ANGLE TR LAB/CM..........:= 1.23183176
EMISSION ANGLE IN EMITTER-FRAME:= 39.5387398
******************* ENERGIES IN KEV ****** ************
ETA...(v/Zp)^2.................:= 0.117769298
ETA..(ENERGY)..................:= 0.114827573
EK(BIND).......................:= 38.2193878
EL(BIND).......................:= 9.28182715
EM(BIND).......................:= 4.10427342
K-ALPHA (LAB.).................:= 32.1171956
K-BETA (LAB.).................:= 37.8636547
L-ALPHA (LAB.).................:= 5.74645901
KINETIC ELEC. ENERGY (LAB.)....:= 4.87086251
E K-REC (LAB)..................:= 47.2897647
E L-REC (LAB)..................:= 15.1725691
E M-REC (LAB)..................:= 9.42611007
##################
8 MeV/U - 145 deg
******************* KINEMATICS ****** *****************
ZPROJ..........................:= 52.
THETA..........................:= 145.
EKIN(MeV/U)....................:= 8.
KINETIC ELECTRON ENERGY (keV)..:= 4.38864217
V (A.U.).......................:= 17.8451164
BETA...........................:= 0.130222112
GAMMA..........................:= 1.00858828
DOPPLER SHIFT..................:= 0.895920831
SOLID ANGLE TR LAB/CM..........:= 0.802674136
EMISSION ANGLE IN EMITTER-FRAME:= 149.078236
******************* ENERGIES IN KEV ****** ************
ETA...(v/Zp)^2.................:= 0.117769298
ETA..(ENERGY)..................:= 0.114827573
EK(BIND).......................:= 38.2193878
EL(BIND).......................:= 9.28182715
EM(BIND).......................:= 4.10427342
K-ALPHA (LAB.).................:= 25.9257634
K-BETA (LAB.).................:= 30.5644416
L-ALPHA (LAB.).................:= 4.63867824
KINETIC ELEC. ENERGY (LAB.)....:= 3.93187594
E K-REC (LAB)..................:= 38.1734216
E L-REC (LAB)..................:= 12.2476582
E M-REC (LAB)..................:= 7.60898
##################
5 MeV/U - 90 deg
******************* KINEMATICS ****** *****************
ZPROJ..........................:= 52.
THETA..........................:= 90.
EKIN(MeV/U)....................:= 5.
KINETIC ELECTRON ENERGY (keV)..:= 2.74290135
V (A.U.).......................:= 14.1416452
BETA...........................:= 0.103196576
GAMMA..........................:= 1.00536768
DOPPLER SHIFT..................:= 0.994666113
SOLID ANGLE TR LAB/CM..........:= 0.989360677
EMISSION ANGLE IN EMITTER-FRAME:= 95.9234773
******************* ENERGIES IN KEV ****** ************
ETA...(v/Zp)^2.................:= 0.0739593675
ETA..(ENERGY)..................:= 0.0717672332
EK(BIND).......................:= 38.2193878
EL(BIND).......................:= 9.28182715
EM(BIND).......................:= 4.10427342
K-ALPHA (LAB.).................:= 28.7832109
K-BETA (LAB.).................:= 33.9331482
L-ALPHA (LAB.).................:= 5.14993724
KINETIC ELEC. ENERGY (LAB.)....:= 2.72827103
E K-REC (LAB)..................:= 40.7438009
E L-REC (LAB)..................:= 11.96059
E M-REC (LAB)..................:= 6.81065272
##################
5 MeV/U - 35 deg
******************* KINEMATICS ****** *****************
ZPROJ..........................:= 52.
THETA..........................:= 35.
EKIN(MeV/U)....................:= 5.
KINETIC ELECTRON ENERGY (keV)..:= 2.74290135
V (A.U.).......................:= 14.1416452
BETA...........................:= 0.103196576
GAMMA..........................:= 1.00536768
DOPPLER SHIFT..................:= 1.08650883
SOLID ANGLE TR LAB/CM..........:= 1.18050143
EMISSION ANGLE IN EMITTER-FRAME:= 38.5498499
******************* ENERGIES IN KEV ****** ************
ETA...(v/Zp)^2.................:= 0.0739593675
ETA..(ENERGY)..................:= 0.0717672332
EK(BIND).......................:= 38.2193878
EL(BIND).......................:= 9.28182715
EM(BIND).......................:= 4.10427342
K-ALPHA (LAB.).................:= 31.440915
K-BETA (LAB.).................:= 37.0663729
L-ALPHA (LAB.).................:= 5.62545782
KINETIC ELEC. ENERGY (LAB.)....:= 2.98018653
E K-REC (LAB)..................:= 44.5058887
E L-REC (LAB)..................:= 13.0649737
E M-REC (LAB)..................:= 7.43951584
##################
5 MeV/U - 145 deg
******************* KINEMATICS ****** *****************
ZPROJ..........................:= 52.
THETA..........................:= 145.
EKIN(MeV/U)....................:= 5.
KINETIC ELECTRON ENERGY (keV)..:= 2.74290135
V (A.U.).......................:= 14.1416452
BETA...........................:= 0.103196576
GAMMA..........................:= 1.00536768
DOPPLER SHIFT..................:= 0.917136431
SOLID ANGLE TR LAB/CM..........:= 0.841139233
EMISSION ANGLE IN EMITTER-FRAME:= 148.261832
******************* ENERGIES IN KEV ****** ************
ETA...(v/Zp)^2.................:= 0.0739593675
ETA..(ENERGY)..................:= 0.0717672332
EK(BIND).......................:= 38.2193878
EL(BIND).......................:= 9.28182715
EM(BIND).......................:= 4.10427342
K-ALPHA (LAB.).................:= 26.5396911
K-BETA (LAB.).................:= 31.2882142
L-ALPHA (LAB.).................:= 4.74852314
KINETIC ELEC. ENERGY (LAB.)....:= 2.51561476
E K-REC (LAB)..................:= 37.5680076
E L-REC (LAB)..................:= 11.0283166
E M-REC (LAB)..................:= 6.27979344
|