Wed Feb 6 10:04:23 2019, Laszlo Varga, Simulations, Background subtraction for 124Xe, 109In, 73As made by MOCADI,
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General remarks to the MOCADI simulations:
- scraper size vertically > (p,g) spot at the scraping position --> (p,g) can be separated by truncating the
backscattered Rutherford events in the energy.
- replacing the atomic masses to nuclear masses does not change significantly the absolute positions of the
(p,g) and the Rutherford. However, the (p,g) spot in the simulation seems bigger using the nuclear masses, than
in the 124Xe experiment with a factor ~1.6.
- going for lighter elements, the separation between (p,g) and Rutherford getting better, than slit can be
placed even more far from the beam in x (radial) direction. For 124Xe the minimal distance from the beam axis is
<4cm, for 73As it is <7.5cm.
- in the simulations the scraping is mostly until x=-inf. However, if the scraping is incomplete in x, we can end
up with underlying background events below the p,g peak (see the last slides)! The Rutherford cone gets bigger by
going down with A,Z. For 91Nb the minimal width of the scraper: x>6cm, for 73As x>7cm. Therefore, I suggest to
have a scraper width x=9cm. For the y, y=6cm should be safe.
- for lighter elements, the (p,g) spot size increases: in the simulation for 73As it reaches the detector size.
However, the (p,g) spot size might be overestimated, please read the 2. point.
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Tue Jun 25 21:19:50 2019, Laszlo, Simulations, MOCADI input parameters,
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initial BEAM input parameters for MOCADI are based on:
- https://web-docs.gsi.de/~weick/mocadi/download/esr-exl-test.in --> twist parameters (ratio of X/A and B/Y)
- M. Steck et al, Electron cooling experiments at the ESR, NIM A 532 (2004) 357-365 --> epsilon_x = 5·10^-7
m*rad, dp/p = 10^-4
Example input for 6AMeV 111Sn beam:
BEAM
1000000
6 , 0 , 110.8803121305 , 50
4
0.27386, 0.182573, 0, 0, 0
4
0.131477, 0.383186, 0, 0, 0
1
0.02, 0, 0, 0, 0
For more explanation please see the attached pdf. |
Tue Jul 9 15:26:59 2019, Yuanming Xing, Simulations, Simulated Rutherford scattering distribution on detector,
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Simulated Rutherford scattering distribution on detector
Beam: 111Sn
Luminosity: 3.08 /mb/s
Distance between the detector and central orbit: 2.80cm
Particle Number in the simulation: 5 Million
Beam quality used in MOCADI input file:
4,
0.27386, 0.182573, 0, -4.0, 0
4,
0.131477, 0.383186, 0, 0.0, 0
1,
0.02, 0, 0, 0.0, 0
1. Beam Energy: 6MeV/u
2. Beam Energy: 7MeV/u
3. Beam Energy: 8MeV/u |
Fri Aug 9 13:43:15 2019, Laszlo, Simulations, pn channel simulations for 111Sn(p,g)112Sb experiment, 12x
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The p,n channel opening for 111Sn beam is at 5.8895 MeV/u beam energy. Therefore, when choosing 6MeV/u, 7MeV/u,
8MeV/u beam energies, there is not much kinetic energy left for the excitation of the 111Sb nucleus --> there
can be "less" nuclear levels populated above groundstate of 111Sb. These "less" states can be handled explicitly
(no continuum levels) with the TALYS code. I make the following steps to simulate the (p,n) products for a given
energy:
1, choose an energy for the 111Sn beam. for this example let it be 8AMeV. Then I use my energy calculator:
/u/lvarga/public/lab2cm_updated 111Sn 8
this gives the last output: " equvivalent (E_lab)^rel for p in talys = 8.06689 MeV ". This energy is the value
what i should put into TALYS as the p projectile energy. In TALYS we have only normal kinematics.
2, make the calculation with the TALYS code for outpopulation, outgamdis and outangle. For the first two cases,
an extra command is given: "maxlevelsbin n 30" to get discrete levels.
3, based on the outpopulation and outgamdis I create an excellsheet which tells me the probability of decay
happening after the n-emission.
from outpopul, I can tell which level is populated in which % after the n-emission. (using the cross sections
and normalizing to the summed cross section)
from outgamdis, I can tell that for a specific level after the n-emission what is the probability of the
decay afterwards. (using the cross sections given).
4, regarding outangle, the cross sections are given for each 2. degree angle only. To get a continuous
dependency, I fit these with a 6. order polinomial function for each level. Later on, I use this polinomial
function for angular corrections.
5, for each decay scheme, I make a MOCADI code. For the target, instead of Hydrogen mass, I am using the proton
mass (otherwise, TALYS and MOCADI will not be compatible, ~511keV gap will remain in the CM energy, which of
course highly influencing the kinematics). For the nuclear masses, my calculator can be used:
/u/lvarga/public/atomic2nuclearMass 111Sn
It is important, that after the first n-emission I put a save point (which is the SAVE #1)for the later angular
corrections.
6, I mix the root file outputs from MOCADI based on the probabilities from my excell table. Also angular
corrections can be given using the (180-tof[1]) angle. There is not much difference however, but the computation
time increases dramatically.
//in the simulations at the PIN-diode position there is a scraping edge 3cm away from the beam. |
Mon Feb 17 08:14:44 2020, Jan, Simulations, 118Te K-REC X-ray energies,
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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
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Full results are attached |
Fri Jun 7 10:18:23 2019, Jan, Runs, prerun001 - MixedAlpha,
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save point: lxg1275:/datalocal1/e127/predata/prerun001-root
~2h run
DAQ setup:
32 ADC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 TDC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 scaler channels (not used)
16 MDPP channels (not used)
Detector setup:
bias -90V
MixedAlpha source ~in central position |
Fri Jun 7 13:52:32 2019, Jan, Runs, prerun002 - MixedAlpha,
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save point: lxg1275:/datalocal1/e127/predata/prerun002
~20min run
DAQ setup:
32 ADC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 TDC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 scaler channles
(not used)
Detector setup:
bias -90V
MixedAlpha source in upper left corner |
Fri Jun 7 14:28:09 2019, Jan, Runs, prerun003 - MixedAlpha,
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save point: lxg1275:/datalocal1/e127/predata/prerun003
~20min run
DAQ setup:
32 ADC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 TDC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 scaler channles
(not used)
Detector setup:
bias -90V
MixedAlpha source in lower right corner |
Tue Jun 11 10:13:56 2019, Jan, Runs, prerun003 - MixedAlpha,
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save point: lxg1275:/datalocal1/e127/predata/prerun004
~10min run
DAQ setup:
32 ADC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 TDC channels
ch. 1-16 (section 0) >> y-strips
ch. 17-32 (section1) >> x-strips
32 scaler channles
(not used)
Detector setup:
bias -90V
MixedAlpha source in center
new air-side cable used (with temp. sensor) |
Wed Oct 23 11:40:29 2019, Jan, Runs, prerun005 - MixedAlpha,
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save point: lxg1275:/datalocal1/e127/predata/prerun005
start: 23.10.19 - 11:40
stopp: 23.10.19 - ~13:30
DAQ setup:
32 ADC channels
ch. 1-16 (section 0) >> x-strips
ch. 17-32 (section1) >> y-strips
32 TDC channels
ch. 1-16 (section 0) >> x-strips
ch. 17-32 (section1) >> y-strips
32 scaler channels
(not used)
Detector setup:
bias -30V
MixedAlpha source in center |
Fri Oct 25 16:34:51 2019, Jan, Runs, prerun007 - MixedAlpha,
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save point: lxg1275:/datalocal1/e127/predata/prerun007
start: Fr 25.10.19 - 16:35
stopp:
DAQ setup:
64 ADC channels
ch. 01-64 (ADC0) >> empty
ch. 33-48 (ADC1 - section0) >> x-strips
ch. 49-64 (ADC1 - section1) >> y-strips
32 TDC channels
ch. 01-64 (TDC0) >> empty
ch. 33-48 (TDC1 - section0) >> x-strips
ch. 49-64 (TDC1 - section1) >> y-strips
64 scaler channels
(not used)
Detector setup:
bias -30V
MixedAlpha source in center |
Tue Mar 17 11:44:58 2020, Jan, Runs, run entry - template ,
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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 |
Fri Mar 20 01:22:23 2020, Shahab, Runs, Setting for Gas target,
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Setting for the machines. |
Fri Mar 20 04:32:22 2020, Shahab, Runs, run entry - run046,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 04:31 , first file: run046_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 04:31:44
ON Rates
Si_X: 1 Hz
Si_Y: 1 Hz
Xray_35: 3 Hz
Xray_90: 33 Hz
Xray_145: 23 Hz
BaF_OR: 2463 Hz
Si voltage: 60.02 V
Si leakage current: 3.93 uA
SIS particles before: 2e9
ESR particles at injection: 5e7
ESR particles after decel.: 2e6
Target ON density: 1.8e13
copy and repeat the above (below the line) every 30 minutes |
Fri Mar 20 05:03:03 2020, Shahab, Runs, run entry - run046,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 04:31 , first file: run046_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 05:00
ON Rates
Si_X: 1 Hz
Si_Y: 1 Hz
Xray_35: 3 Hz
Xray_90: 28 Hz
Xray_145: 24 Hz
BaF_OR: 2452 Hz
Si voltage: 60.02 V
Si leakage current: 3.93 uA
SIS particles before: 2e9
ESR particles at injection: 5e7
ESR particles after decel.: 2e6
Target ON density: 1.8e13
copy and repeat the above (below the line) every 30 minutes |
Fri Mar 20 05:32:44 2020, Shahab, Runs, run entry - run047,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 05:30 , first file: run047_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 05:30
ON Rates
Si_X: 0 Hz
Si_Y: 0 Hz
Xray_35: 2 Hz
Xray_90: 27 Hz
Xray_145: 20 Hz
BaF_OR: 2379 Hz
Si voltage: 60.02 V
Si leakage current: 3.93 uA
SIS particles before: 2e9
ESR particles at injection: 5e7
ESR particles after decel.: 5e6
Target ON density: 1.97e13
copy and repeat the above (below the line) every 30 minutes |
Fri Mar 20 06:00:26 2020, Shahab, Runs, run entry - run047,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 05:30 , first file: run047_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 06:00
ON Rates
Si_X: 1 Hz
Si_Y: 1 Hz
Xray_35: 3 Hz
Xray_90: 33 Hz
Xray_145: 23 Hz
BaF_OR: 2512 Hz
Si voltage: 60.02 V
Si leakage current: 3.94 uA
SIS particles before: 2e9
ESR particles at injection: 5.3e7
ESR particles after decel.: 5.8e6
Target ON density: 1.97e13
copy and repeat the above (below the line) every 30 minutes |
Fri Mar 20 06:34:40 2020, Shahab, Runs, run entry - run048,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 06:33 , first file: run048_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 06:36
ON Rates
Si_X: 0 Hz
Si_Y: 0 Hz
Xray_35: 0 Hz
Xray_90: 39 Hz
Xray_145: 16 Hz
BaF_OR: 2590 Hz
Si voltage: 60.02 V
Si leakage current: 4.0 uA
SIS particles before: 2e9
ESR particles at injection: 5.8e7
ESR particles after decel.: 5.2e6
Target ON density: 1.55e13
copy and repeat the above (below the line) every 30 minutes |
Fri Mar 20 07:01:06 2020, Shahab, Runs, run entry - run048,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 06:33 , first file: run048_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 07:00
ON Rates
Si_X: 0 Hz
Si_Y: 0 Hz
Xray_35: 1 Hz
Xray_90: 39 Hz
Xray_145: 38 Hz
BaF_OR: 2498 Hz
Si voltage: 60.02 V
Si leakage current: 4.03 uA
SIS particles before: 2e9
ESR particles at injection: 5.8e7
ESR particles after decel.: 5.4e6
Target ON density: 1.57e13
copy and repeat the above (below the line) every 30 minutes |
Fri Mar 20 07:30:16 2020, Ragan, RuiJiu, Runs, run entry - run049,
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beam: 124Xe54+
energy: 10 MeV/u
purpose: data with TARGET ON
Detector position (Si): -25 mm
run start at 07:31 , first file: run049_0001.lmd
run stop at xx:xx , last file: run0xx_0xxx.lmd
_______________________________________________________________________________
time: 07:30
ON Rates
Si_X: 0 Hz
Si_Y: 0 Hz
Xray_35: 0 Hz
Xray_90: 35 Hz
Xray_145: 23 Hz
BaF_OR: 2483 Hz
Si voltage: 60.02 V
Si leakage current: 4.02 uA
SIS particles before: 2.3e9
ESR particles at injection: 5.8e7
ESR particles after decel.: 5.8e6
Target ON density: 1.35e13
copy and repeat the above (below the line) every 30 minutes |
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