HOME ESR EXPERIMENTS LABS etc
E121 E127 E132 E125 E143 laser_cooling_2021 E142 Ê128 E146 E0052 E0018 E0028 E0038
  proton-capture on 118Te, Page 23 of 29  Not logged in ELOG logo
ID Date Author Category Subject Year
  134   Sat Mar 21 15:30:34 2020 SergiyGeneralgo into the ESR 
We are going into the ESR to check the electronics.
Use calibration sources (133Ba etc).
  133   Sat Mar 21 15:26:49 2020 LaszloGeneralSCRAPER is ON use again 
Yuri puts back the scraper (Egelhof 1 - GE01DD1IG) into position = +19. (where it was in the evening)
  132   Sat Mar 21 15:23:57 2020 SergiyRunsrun entry - run063 
open file : run063

beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON, we had to stop becasue Ulli was noticing some strange effects with the target density. He needs now time to optimize that.

Detector position (Si): -24 mm

run start at 15:04 , first file: run063_0001.lmd
run stop  at 15:04:21 , last file:  run063_0xxx.lmd

_______________________________________________________________________________

time: 15:04 pm.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:   2 Hz
Xray_90:   25 Hz
Xray_145:  30 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.10 uA


SIS particles before:           ~2e9
ESR particles at injection:     estimated ~1e6
ESR particles after decel.:     
Target ON density:              1.52e13


copy and repeat the above (below the line) every 30 minutes
  130   Sat Mar 21 14:52:05 2020 LaszloGeneraltarget optimization 
previous position of the beam at target was -3mm (for the night position)
max. intensity position of the beam at target 1s -1mm. --> now it is set to this position

now Ulli also increasing the density of the jet. Right now Ulli is warming the noozle. --> takes 1hour roughly.
Earlier: 1.4E13
Now: 
Attachment 1: IMG_20200321_145105.jpg
IMG_20200321_145105.jpg
Attachment 2: IMG_20200321_145059.jpg
IMG_20200321_145059.jpg
  129   Sat Mar 21 13:44:16 2020 Pierre-MichelDetectorsRecoil detector 
We turn on Recoil detector, to use it as a monitor for target overlap.

MCP front -2500 V for highest signal rate. 
(Used to be -2250 V during previous beam time.)

DAQ triggered with 1 kHz clock in 2nd trigger input.
(2nd trigger used to be x-rays in previous beam time.)

The picture shows the increase of the Recoil rate when increasing the voltage from 2250 V to 2500 V in steps of 50 V. The last shot was taken without beam, so just target on.
Attachment 1: Recoil.pdf
Recoil.pdf
  128   Sat Mar 21 13:37:53 2020 Laszlo MCP can monitor target 
now with the MCP we can see clearly the effect of the target :) (scintillation?)
so we want to scan through the target thickness with the beam and choose the best position afterwards.

We are making 3shoots for each bumb position (we change the bumb to make the intersection between beam and target) starting at ~14:

the data will be saved at the lxg1299 data.local2/hillenbrand/Laszlo folder
  127   Sat Mar 21 13:24:10 2020 LaszloRunsrun entry - run063 
open file : run063

beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON, we had to stop becasue Ulli was noticing some strange effects with the target density. He needs now time to optimize that.

Detector position (Si): -24 mm

run start at 15:04 , first file: run063_0001.lmd
run stop  at 15:04:21 , last file:  run063_0xxx.lmd

_______________________________________________________________________________

time: 15:04 pm.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:   2 Hz
Xray_90:   25 Hz
Xray_145:  30 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.10 uA


SIS particles before:           ~2e9
ESR particles at injection:     estimated ~1e6
ESR particles after decel.:     
Target ON density:              1.52e13


copy and repeat the above (below the line) every 30 minutes
  126   Sat Mar 21 12:42:21 2020 RaganGeneralEntry to ESR for MCP detector 
Pierre Michel and Laszlo go inside the ESR for switching on the MCP detector so that the photons from the gas jet and secondary beam interaction can be seen.

Close file: run061
  125   Sat Mar 21 12:32:00 2020 LaszloGeneralEstimated target thickness 
Target thickness must be like 5mm (was measured with a moving thin wire)
The beam thickness is small because of the low intensity
Maybe we hit the target a bit offset --> less rate?

We might have the option to increase the target 1magnitude more, but this might not help because we can kill the beam 
with this.

I have the impression we just simply have less number of stored ions like 10^4 or evem less...

Yury: "we are unsure about the settings and desperately seek for any means of additional diagnostics"
  124   Sat Mar 21 12:30:30 2020 RaganRunsrun entry - run061 
beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON

Detector position (Si): -24 mm

run start at 12:00 , first file: run061_0001.lmd
run stop  at xx:xx , last file:  run0xx_0xxx.lmd

_______________________________________________________________________________

time: 12:30 am.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:    1 Hz
Xray_90:   23 Hz
Xray_145:  16 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.12 uA


SIS particles before:           2.5e9
ESR particles at injection:     estimated ~1.03e6
ESR particles after decel.:     
Target ON density:              1.76e13


copy and repeat the above (below the line) every 30 minutes
  123   Sat Mar 21 12:06:50 2020 LaszloGeneralrun61 - SCRAPER moved out 
we want to see any change on the Silicon count rate, because we will have now also Rutherford scattering. 
  122   Sat Mar 21 12:02:57 2020 Ragan, LaszloGeneralrun entry - run061 
12:02 pm - scapper is taken out completely 
open file : runstart061
  121   Sat Mar 21 12:00:27 2020 Ragan, AlexRunsrun entry - run060 
beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON

Detector position (Si): -24 mm

run start at 11:30 , first file: run060_0001.lmd
run stop  at xx:xx , last file:  run060_0xxx.lmd

_______________________________________________________________________________

time: 12:00 am.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:    4 Hz
Xray_90:   28 Hz
Xray_145:  77 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.04 uA


SIS particles before:           3.1e9
ESR particles at injection:     estimated ~1.08e6
ESR particles after decel.:     
Target ON density:              1.74e13


copy and repeat the above (below the line) every 30 minutes
  120   Sat Mar 21 11:32:46 2020 Ragan, AlexRunsrun entry - run060 
Open file: runstart060

beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON

Detector position (Si): -24 mm

run start at 11:30 , first file: run060_0001.lmd
run stop  at xx:xx , last file:  run0xx_0xxx.lmd

_______________________________________________________________________________

time: 11:30 am.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:    4 Hz
Xray_90:   30 Hz
Xray_145:  21 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.04 uA


SIS particles before:           3.1e9
ESR particles at injection:     estimated ~1.08e6
ESR particles after decel.:     
Target ON density:              1.54e13


copy and repeat the above (below the line) every 30 minutes
  119   Sat Mar 21 11:30:04 2020 LaszloGeneralMWPC movement 
now we try to move the capture detector (MWPC in the 1. dipol before our Si setup) inside the ring while the DAQ was ON

we tried to move it as close as possible to the beam

On the picture below you can see that we had some increased current while moving the MWPC --> scattering from the beam while scraping it
Attachment 1: MWPC_movement.png
MWPC_movement.png
  118   Sat Mar 21 11:25:47 2020 Laszlo possible misalignement between target and fragment beam 
after 9hours of measurement we see only 19 counts on our targetON silicon detector histo. this low count rate can indicate two scenarios:
-we have a mismatch between the beam and the target (not much if any overlap)
-mabye the very low intersity of the beam (we cannot really monitor this, there are only estimates...)

Which tells us that we dont intersect with the target, that on the Xray spectras we dont see any peaks at 90 and 145 angles. There are two peaks in 35 angle, but they are maybe only from Pb conversion 75keV, etc...
Attachment 1: Te_measurement_after_first_night.png
Te_measurement_after_first_night.png
  117   Sat Mar 21 11:04:47 2020 Ragan, Alex, LaszloRunsrun entry - run059 
beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON

Detector position (Si): -24 mm

run start at 10:30 , first file: run059_0001.lmd
run stop  at xx:xx , last file:  run0xx_0xxx.lmd

_______________________________________________________________________________

time: 11:07 am.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:    2-3 Hz
Xray_90:   29 Hz
Xray_145:  17 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.04 uA


SIS particles before:           2.5e9
ESR particles at injection:     estimated ~1.3e6
ESR particles after decel.:     
Target ON density:              1.34e13


copy and repeat the above (below the line) every 30 minutes
  116   Sat Mar 21 10:28:23 2020 Ragan, AlexRunsrun entry - run059 
Open file: runstart059

beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON

Detector position (Si): -24 mm

run start at 10:30 , first file: run059_0001.lmd
run stop  at xx:xx , last file:  run0xx_0xxx.lmd

_______________________________________________________________________________

time: 10:30 am.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:   0 Hz
Xray_90:   40 Hz
Xray_145:  15 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.00 uA


SIS particles before:           3.2e9
ESR particles at injection:     estimated ~1.3e6
ESR particles after decel.:     
Target ON density:              1.59e13


copy and repeat the above (below the line) every 30 minutes
  115   Sat Mar 21 10:20:27 2020 Ragan, AlexGeneralTarget LN2 
The LN2 Dewar on the ESR roof has been refilled.
  114   Sat Mar 21 10:00:19 2020 Ragan, AlexRunsrun entry - run058 
beam: 118Te52+
energy: 10 MeV/u

purpose: data with TARGET ON

Detector position (Si): -24 mm

run start at 09:30 , first file: run058_0001.lmd
run stop  at xx:xx , last file:  run0xx_0xxx.lmd

_______________________________________________________________________________

time: 10:00 am.

ON Rates
Si_X:      0 Hz
Si_Y:      0 Hz
Xray_35:   1 Hz
Xray_90:   32 Hz
Xray_145:  19 Hz
BaF_OR:     Hz

Si voltage:          60.02 V  
Si leakage current:  4.03 uA


SIS particles before:           3.2e9
ESR particles at injection:     estimated ~1.1e6
ESR particles after decel.:     
Target ON density:              1.716e13


copy and repeat the above (below the line) every 30 minutes
ELOG V3.1.5-fc6679b