ID |
Date |
Author |
Subject |
307
|
Fri May 26 04:20:54 2017 |
JLT,AA,AT | CLOVER 60Co |
60Co No AIDA, Efficiency calibration
Start: 12:21
Stop: 12:50
Files:
170526_1221_60Co_noAIDA_z0cm_017.dlt
170526_1221_1250_60Co_z0cm.root |
294
|
Wed May 24 13:22:46 2017 |
JLT,AT,KR,SG,RY,... | CLOVER 152Eu |
We connect the pulser to both CLOVERs
G7: It looks OK except for the G7-Green as before
(there pulser peak in the spectrum)
D4: the pulser peak appears at very low energies (200-600keV)
there seems to be a problem with pulser processing in the preamplifiers.
Should we still use it? We remove for the moment.
152Eu source calibration.
We put the 152Eu source at the center (on the cardboard)
and check de energy calibration. For most of the crystals
the calibration from March was pretty good except for D4-Red
that the gain changed by a factor 1/2 and D4-blue that changed by 2 (!?)
We redo the calibration:
G7: the resolution at 1.4MeV is 2.7keV
D4: the resolution at 1.4MeV is 3.9keV
DLT File; 170525_0947_152Eu_z0cm.root_000.dlt
RUN Number; 000
RootFile: 170525_1034_152Eu.root
Comments: rate of the clovers increased from 2000cps to 2400cps
for 10 min (from TS = 41.8E6 ms to TS = 42.4E6 ms)
We plugged the pulser in clover D4.
DLT File: 170525_0947_152Eu_z0cm_PulserD4_001.dlt
RUN Number: 001
RootFile: 170525_1146_152Eu_z0cm_D4Pulser.root
Source dimensions:
Diameter: 24.98 mm
DZ= 5.98 mm
Source ID: Ref 272, 09/9011
Source label up |
52
|
Wed Jul 20 16:12:58 2016 |
S. Go, ... | CLOVER |
Mounting of the CLOVER detectors in position
CLOVER G7: right of beam
CLOVER D4: left of beam
G7 crystals:
Beam ->
Back view:
Red Blue
Green Black
D4 crystals:
Beam ->
Front view:
Red Green
Blue Black
Photos of the arrangement with COVER detectors attached |
53
|
Wed Jul 20 16:40:57 2016 |
S. Go, J.Agramunt, A.Tolosa, J.L. Tain,... | CLOVER |
Calibration and resolution check
CLOVER detectors were calibrated in energy with 60Co and 137Cs
60Co source: 2530, 8.81E4Bq (16/03/2010)
137Cs source: CD393 (box), ?
Sources were placed at the center
Resolution(FWHM@1333keV):
G7 Blue:2.67keV
G7 Green: 2.84keV
G7 Red: 2.77keV
G7 Black: 2.64keV
D4 Blue: 3.60keV
D4 Green: 3.35keV
D4 Red: 3.41keV
D4 Black: 4.85keV (!?)
Efficiency calibration with 152Eu
Source place at the center
Source: 272 (09-7011), 1.062E4Bq (error:1.9%)@16/03/2010
File: 160719_2201_152Eu_028.dlt
Online: 160719_2201_152Eu_028.root
Attached 152Eu spectrum |
74
|
Tue Oct 11 15:47:45 2016 |
N Brewer, S Go et al | CLOVER |
Both COVER detectors are installed in place.
See photos.
Detector D4: left of the beam
Crystal distribution:
BLUE-BLACK
RED -GREEN
Detector G7: right of the beam
Crystal distribution:
BLUE-BLACK
RED -GREEN
Cables connected. Some work on noise minimization.
Resolution improved for D4-Black which was poor
on July. Otherwise similar behaviour.
See spectra with 137Cs and 60Co sources ta the center.
File:161011_1805_CLOVER_CsCo.root
We are using the calibration from July which
works surprisingly well for all except G7Red
(explains double peak in spectrum)
More checks to be done. |
80
|
Thu Oct 13 04:36:58 2016 |
JL Tain et al | CLOVER |
CLOVER energy calibration
Short run with 137Cs and 60Co sources at BRIKEN detector center
to make a new energy calibration
Root file: 161013_1240_137Cs60Co.root
We conected the test input to the pulser, and a new calibration was needed
Root file: 161013_1518_137Cs60Co.root |
82
|
Thu Oct 13 23:38:26 2016 |
JL Tain et al | CLOVER |
Energy and efficiency calibration
We make calibrations for the remaining D4 CLOVER detector
(No pulser: D4 preamp does not see the pulser input, a single TEST input)
Sources on the cardboard holder, place at the center of BRIKEN
137Cs (Ref:CD393) together with 60Co (Ref:CD395):
File: 161013_2331_137Cs60Co.root
152Eu (Ref:272/09-7011):
File: 161013_2350_152Eu.root
The threshold in Black,Green and Blue is cutting Ba X-rays.
Activity of the sources:
>> 60Co (Ref:CD395): 338.4 kBq (+-3%) measured on 01.07.1990
>> 137Cs (Ref:CD393): 347.9 kBq (+-3%) measured on 01.07.1990
>> 152Eu (Ref:272/09-7011): 10.62 kBq (+-1,9%) measured on 16.03.2010
See figures. |
96
|
Tue Nov 1 09:27:02 2016 |
Alvaro Tolosa | CLOVER |
Efficiency calibration
File "cloversEff.ods" and "cloversEff.xls" contains the experimental efficiency from different measurements
during July and October
(G7 broke before Eu-152 measurement). We can assume the efficiency didn't change from July measurements to
October measurements. |
208
|
Wed Mar 29 07:34:16 2017 |
J. Agramunt | BrikenTools repository installed at d05 |
The last version of Briken tools repository has ben installed at d05, this repository includes the Merger and the BrikenOffline codes, as well as a CommonTools folder to share scripts and code.
For update versions, just type in the desired directory "svn update". |
148
|
Wed Nov 9 02:02:22 2016 |
Iris | Boron rubber from India |
The boron rubber from India is BR-2871, price US-$ 2700 for 2pc 1m x 2m x 3.3mm.
52% B content, density 1.61 g/cm3 |
28
|
Fri May 8 03:20:48 2015 |
J.Agramunt J.L.Tain K.Gabor | BnCorrelation |
We run all the night until the end of beam time, and the Bn correlations are more clear now. |
398
|
Fri Oct 26 15:15:55 2018 |
JA, ATS, ATD, JLT, AA | Background measurements |
No pulser (inhibit in clock)
DLT: 181026_2244_Bkg_NoPulser_114.dlt
Online: 181026_2259_Bkg_NoPulser.root
TTree: 181026_2244_Bkg_NoPulser_114.root
With pulser:
DLT: 181026_2305_Bkg_Pulser_115.dlt (erased)
Online: 181026_2314_Bkg_Pulser.root
TTree: no
VME crate reset
No pulser:
DLT: 181026_2324_Bkg_NoPulser_116.dlt
Online: 181026_2331_Bkg_NoPulser.root
We adjust all the thresholds reducing them
drastically to see the noise.
Overnight measurement:
Online: 181027_1137_BkgOverNight_NoPulser.root
Start measurements with DLT
No pulser:
Start: 11:42
Stop: 12:46
DLT: 181027_1142_Bkg_NoPulser_VeryLowThr_117.dlt
Online: 181027_1246_Bkg_NoPulser_VeryLowThr.root
Bckg rate:
Fit to RateBRIKEN= 0.340 cps
With pulser:
Start: 12:53
Stop: 14:08
DLT: 181027_1253_Bkg_Pulser_VeryLowThr_118.dlt & *_119.dlt
Online: 181027_1408_Bkg_Pulser_VeryLowThr.root
Bckg rate:
t(10Hz pulse)= 4458s, BRIKEN:2547 counts, Rate=0.571 cps
tube bkg (Integral(l830,1550))=885, net=1662counts, Rate=0.373cps
Fit to RateBRIKEN= 0.566 cps
252Cf source in the center
With pulser:
Start: 14:37
Stop: 16:51
DLT: 181027_1437_252Cf_Pulser_VeryLowThr_120.dlt Runs: 120-123
Online: 181027_1437_252Cf_z0cm_Pulser_VeryLowThr_1652.root
252Cf rate:
t(10Hz pulse)=7973.80 s, BRIKEN: 7.66289e+07 counts, Rate= 9610.09 cps
Fit to RateBRIKEN= 9594.69 cps
No pulser:
Start: 16:57
Stop: 18:47
DLT: 181027_1657_252Cf_NoPulser_VeryLowThr_124.dlt
Online:181027_1657_252Cf_z0cm_NoPulser_VeryLowThr_1847.root
Fit to RateBRIKEN=9591.79 cps
Background:
No Pulser:
DLT: No
Online: 181028_1056_BkgOverNight_NoPulser.root
With pulser:181028_1056_1641_Bkg_Pulser.root
DLT: No
Commments: Corr_BR_BR looks funny. It shows periodic peaks. Probably related to the
filling of the Ge detector. We will stop to check if it appears again |
339
|
Sat Oct 21 17:30:23 2017 |
JA, ATD, JLT | Background measurement overnight |
22/10/2017
Start: 01:26
Run: 037
Stop: 11:01
Run: 039
List mode: 171022_0126_bck_*.dlt
Root file: 171022_0126_1101_bck.root
Observations:
1. The noise in 3He tubes has been effectively suppresed
(compare figure of BRIKEN spectrum in attachment with similar
figures of previous runs)
2. The 252 Cf source used immediately before has activated
something as can be deduced from the change of rate
in the D4 detector compared to G7 (standing on the floor)
see picture below. The effective half-life of the activation is
T1/2=71.8min
(see figures in attachment) |
360
|
Tue Oct 16 09:00:02 2018 |
ATD & JLT | Background measurement overnight |
18/10/16 START: 16:56
18/10/17 STOP: 9:51
ROOT file: 181017_0951_BkgOverNight.root
Comment:
Tube 121 is noisier than the others (see fig).
Issue:
all the channels connected to PA3 and PA4
have twice the number of counts than the remaining channels (!?).
Actually the pulser counts.
Solution:
This channels are from UPC tubes and are connected to pulser PB-5.
We found that the threshold of external trigger was set to 1V
instead to 1.8V as before and this was producing a double pulse (see photo)
like triggering on the fall and rise of the trigger pulse.
This happen whenever the threshold as below 1.6V.
We do not understand this: the signal has +2.2V and no apparent ripple (!????).
We set threshold to 1.8V and now is OK |
104
|
Thu Nov 3 05:46:48 2016 |
Iris, Ale | Background measurement |
Background measurement for threshold determination
Started at 14:45
Stopped: 16:35
Root file: 161103_1635_bck.root |
111
|
Sat Nov 5 01:26:46 2016 |
Jose,Iris,Alvaro, Alejandro, Krzysztof | Background measurement |
Measurement overnight
Start: around 1:00
Stop: 9:35
File: 161105_0935_BackgroundOvernight.root
The background level after removing the 252Cf source
from the hall dropped to 0.4n/s.
During the night there were neutron rates up to 120 n/s (see figure)
There is a huge spike in the rates which coincides with the time of
LN2 filling. One can see spike in several spectra (not in all)
One can see also a structure superposed
The rate per rings is also shown. The outer rings see
a higher rate.
Also shown is the comparison of He107 one (blue) of the outer ORNL2 tubes
with He084 one (red) of the inner ORLN2. The increase in count rate
is about 30%.
Also shown is the comparison of two external tubes on the top and the bottom:
He107 (blue) and He137 (red), ORNL2 tubes. There is no increase in count rate.
Also shown is the comparison of a tube above the lead shielding He028 (blue)
and behind the lead shielding He048 (red), UPC tubes. There is no difference.
There is also comparison between the rate in the CLOVERS and BRIKEN.
Without beam the rate in the Clovers is around 100 g/s against 0.4 n/s in BRIKEN
At the maximum both rates are similar around 130 c/s.
There is also a plot of the gamma-neutron correlation.
We see that there are neutrons which are detected before
the gammas. A possible explanation several neutrons are produced
one is detected first the second later produces a gamma. |
303
|
Thu May 25 14:31:46 2017 |
AT, JLT, AA, AIM | Background measurement |
Background, No AIDA
Start:22:31
Stop: 09:24
dlt files: 170525_2231_bck_noAIDA_z0cm_010.dlt
run: 010-011-012
root file: 170525_2231_0924_bck_noAIDA_z0cm.root |
159
|
Thu Nov 24 14:57:55 2016 |
AT | Background Beam ON |
Starting from today 12:22, the background generated by the different setups on BigRips is monitorized.
- 30 min aprox Beam off
- 25 min aprox 29F after C target in F8
- 14 min aprox Beam Off
- 272 min aprox 27F
- 11.5 min Beam Off
- Tunning for 10Min
Adquisition is stopped at 18:22
Files:
161124_1222_010.dlt
161124_1222_011.dlt
161124_1222_010.root (online)
The RUN summary for this experiments is found in
http://ribfdaq/~gamma16/expdbrunsum.php (Access only from RIKEN) |
163
|
Fri Nov 25 03:49:44 2016 |
AT | Background Beam ON |
16/11/25 12h28min: Background measurement beam ON 19B |
161
|
Fri Nov 25 03:37:23 2016 |
AT | Background Beam OFF/ON |
16/11/24 21h06min: Background measurement Beam OFF + Beam ON tunning and 22C
21:41 : Until now Beam OFF, BigRips team tunning the machine. An online is saved
File: 161124_2106_013.root |