18/10/18 START: 08:31
18/10/18 STOP: 10:50

** Use of other configuration file:
181016_Conf_BrikenFull_2153_test_thr.xlsx

ROOT file: 181018_1050_252Cf_z0cm_lowThr.root
DLT: 
191017_0831_252Cf_z0cm_lowThr_014.dlt
191017_0831_252Cf_z0cm_lowThr_015.dlt
191017_0831_252Cf_z0cm_lowThr_016.dlt

Comment: 
- 252Cf source placed at the center using cardboard piece, z=0cm, orientation of the source with its axis parallel to the beam axis, i.e. axis of the source upstream to the beam. 
- 3He counters with a threshold 5% lower compared to previous measurement.
- Clovers inside the moderator, surface position 11.6/2 cm from the each one. 
- AIDA not inside the moderator.
- Without in beam PE shielding. 

18/10/18 START: 17:22
18/10/18 STOP: 20:09

** Use of other configuration file: 
181016_Conf_BrikenFull_2153_test_thr.xlsx

ROOT file: 181018_1722_252Cf_z0cm_2010.root
DLT: 
181018_1722_252Cf_z0cm_021.dlt
181018_1722_252Cf_z0cm_022.dlt
181018_1722_252Cf_z0cm_023.dlt


Comment: 
- 252Cf source placed at the center using cardboard piece, z=0cm, source axis perpendicular to
the beam axis.
- Clovers WITHOUT the moderator. 
- AIDA not inside the moderator.
- Without In beam PE shielding.

18/10/17 START: 18:16
18/10/17 STOP: 22:00

ROOT file: 181017_1816_252Cf_z0cm_2200.root
DLT: 
181017_1816_252Cf_z0cm_000.dlt
181017_1816_252Cf_z0cm_001.dlt
181017_1816_252Cf_z0cm_002.dlt
181017_1816_252Cf_z0cm_003.dlt

Comment: 
- 252Cf source placed at the center using cardboard piece, z=0cm, orientation of the source similar to past year
measurements, i.e. axis of the source perpendicular to the beam axis.
- Clovers inside the moderator, surface position 11.6/2 cm from the each one. 
- AIDA not inside the moderator.
- Without in beam PE shielding.  

Measurement of BRIKEN neutron counter efficiency
252Cf source in the (approximately) center
Wasabi and D4 clover inserted. G7 on the floor.
YSO on the box with light pulser.

The source was plug in a Styrofoam piece at the right height
so that it could be centered longitudinally with the D4 Clover
and transversely with the Wasabi nose.
Possible position difference with previous efficiency
measurements using the cardboard source holder
should not impact the efficiency obtained.


Start: 00:41
Stop: 01:08
Run number: 36
List mode: 171022_0041_252Cf_036.dlt
Root file:  171022_0041_0108_252Cf.root
 

First measurement with full 140 tube version 
of the BRIKEN neutron detector

Directory: /data/160716Test01/
Configuration: 160718Conf_BrikenFull.xlsx
File: 160718_FullBrikenFirstData_252Cf_002.dlt
Online: 160718_FullBrikenFirstData_252Cf.root

All tubes and channels working!

Sample of screenshots included.

Measurement with the source at the center

Listmode: 160719_BRIKEN_252Cf_009.dlt
Online: 160719_BRIKEN_252Cf.root

BRIKEN: 1.03697E7
Pulser: 5985

Rate: 17326 n/s

19/Jul/2016
Scanning of the efficiency as a function of longitudinal position

File:160719_BRIKEN_252Cf_XXmm_*.dlt
Online:160719_BRIKEN_252Cf_XXmm.root
Run: 011-025
Distances: -275,-175,-125,-75,-50.-25,+25,+50,+75,+125,+175,+225,+275,+375mm

Measurement of the 252Cf source at the central position

Efficiency and neutron-gamma correlations

Listmode: 160719_2233_252Cf_XX.dlt, Run: 029-030
Online: 160719_2233_252Cf_029_030.root

First measurement with 252Cf source to check the calibration.
AIDA was in place so the source was at the right height
but displaced about 10cm from the center.

We use the last configuation file used in July: 
160718Conf_BrikenFull_cal5.xlsx

tmeas=25min
file: 161006_2235_252Cf.root

The noise is rather small.
The calibration of July is nearly OK!

New BRIKEN energy calibration


We check the 3He tubes energy calibration with 252Cf source
We Found that only one tube He006 was slightly shifted and correct it.

Check measurement:
File: 161014_0113_252Cf.root

See figure

Check of BRIKEN calibration and thresholds

Source more or less at the center

Online File: 161103_1319_252Cf.root

Measurement with 252Cf at Z=22.5cm from the moderator border, opposite side from AIDA.
Clovers and Veto detectors are turned off.
Beam is off.

Files: 
161122_1820_001.dlt
161122_1820_002.dlt
161122_1820_001.root
Obs: There is a problem in the online data for this run. DAQ for VME1 do not stored data. This problems seems to
be a crash on the DAQ. I restarted the system and run again the measurement. The display for voltages has lost
connection. The channels on VME1 have been checked, no problems is observed in the waveforms.

Again, this time without observing problems:
File:
161122_2208_003.dlt
161122_2208_003.root

BRIKEN spectrum is attached for this run. Counts in the pulser are 1.123e4

Check of calibrations and rates for neutron detectors with Conf File 161107Conf_BrikenFull.xlsx

Measurement 161122_2208_003.root has been used to check the calibrations and counting rates in the BRIKEN
detector. Condition of the measurement:
252Cf at 22.5cm from moderator, opposite sede from AIDA

RESULTS

Calibrations factors:
Calibrations of the neutron detectors are reasonable in the current conditions. A check detector by detector
(see attached file) shows that the full peak for most of the counters is around 764keV. Only 3 counters are
shifted more than 10keV:
He134	741.901
He135	750.312
He140	748.587	

The impact on the counting rates would not be serious.

Counting rates (n/pulser):
#########################################
Total neutron rate:	1516.28
#########################################
	BY RING:
#########################################
R1	359.057
R2	222.997
R3	386.299
R4	253.833
R5	143.434
R6	90.6357
R7	60.025

The total current counting rate is lower than rate obtained in Oct 12th (total 1550.91 n/pulser). The difference
is due mainly to a decrease in the counting rates for rings 1 to 4.

252Cf source at the center for calibration

23/03/2017
Start: 19:02
Stop: 19:38

Root file: 170323_1902_1938_252Cf.root

252Cf at the center for BRIKEN calibration


Start: 17:31
Stop: 18:00

File: 170327_1800_252Cf.root

3He tube calibration done with script BrikenCal.cpp
Result stored in 170327_1800_252Cf_Cal.ods (attached)

After visual superposition of all spectra we decided
to change only the parameters of He003 and He133
in the new calibration file.

252Cf source in Z=0cm position. 

Start:21:41
Stop:21:52 


Files
170525_2141_252Cf_z0cm_006.dlt
170525_2141_2152_252Cf_z0cm.root

We realized that the time stamp was not reset.

252Cf source in Z=0cm position. 

Start:21:57
Stop: 22:26


Files
170525_2157_252Cf_z0cm_008.dlt
170525_2157_2226_252Cf_z0cm.root

The time stamp was reset finally (at the third try !!!)

There is a file 170525_2154_252Cf_z0cm_007.dlt which was taken for a short time, until we noticed again that the
time stamp was not reset. 

Paper logbook for October-2016
For correct visualization, 
please download it.

Paper logbook for July-2016
For correct visualization, 
please download it.

After experiment 152Eu calibration



Working directory: /data/1706FinalCalibrations
Configuration file: 170604_Conf_BrikenFull_AfterCrisis.xlsx

DLT file name: 170613_1451_152Eu_000.dlt
Start: 14:51
Stop: 15:24
Online rootfile:152Eu_cal_z0_1451_1524_170613.root

COMMENTS:

1. Source centered in both BRIKEN and clovers (faced towards clover D4)
2. No AIDA in
3. D4 clover pulsers are at 253, 260, 265, and 271 keV
4. G7 clover pulsers are beyond 5 MeV. No pulser for crystal G7Green