16-Oct-2018

- Start DACQ computer: OK!
- Create directory: /data/1810Preparation/
- Copy last configuration RIBF139 file:  171119_1126_Conf_BrikenFullYSO.xlsx
- Return PB-5 pulser into crate and set parameters
- Star all crates: OK!
- Start DACQ: OK!
- Rename configuration file and edit to eliminate YSO related parameters
  New Config file: 181016_Conf_BrikenFull.xlsx
- Start 3He tube HV: power the ethernet hub, power the pixie PC,
  edit the hvmon.conf file (only tubes active), run hvmon: OK!
- We realized that current and voltage of VME crate 1 was oscillating.
  We pulled out V1A7 (not used) and it became stable: seems that we are at the limit of 
  power supply: OK!
- We put the 252Cf source in and check gain match:
  only (the gain of) three tubes moved slightly since the last run (one year ago)!
  He006, He134, He135 -> new calibration: OK!
- We move SIS3820 clock from internal to external frequency:
  Setup UK Tektronix clock: 25MHz, square signal, 800mVpp, -400mV offset
  Plug in Lupo module (VME1 crate): OK!


ISSUE: the current placement of the table supporting the MUSIC chamber
is too close to the VME1 crate and one of the modules (V1A4) 
cannot be extracted in case of failure. However V1A7 is unused
in this run and can be used as replacement.

The PB-5 Pulse generator labeled "Pulser 2" and the 428F Linear Fan in-out labeled "Clover G7" from BRIKEN NIM crate have to be returned to the RIBF electronics pool because the 
borrowing time is expired.

For the Pulser 2, the external trigger input and pulse output cables were labeled before removing the module.

   - Attachment 1: Original position and cabling of the pulser. The serial number of the pulser is 052010010247 
   - Attachment 2: A picture of the crate after removing the pulser.
   - Attachment 3: Original Pulser setting.

The Linear Fan in-out was replaced with a new module (same version 428F), which can be used for a long time. The position of the input and output cables in the module were kept 
unchanged.

   - Attachment 4: Original position and cabling of the Linear Fan in-out module. The serial number of the original module is 051999070282
   - Attachment 5: New Linear Fan in-out module after replacement.
   - Attachment 6: Oscilloscope view of the 10kHZ NIM test input signal (blue) and output signal (yellow) of the old Linear fan in-out module.
   - Attachment 7: Oscilloscope view of the 10kHZ NIM test input signal (blue) and output signal (yellow) of the new Linear fan in-out module.

List of files in BRIKEN DAQ PC:

Experiment DA1702 (including the test with YSO during first night)
*.dlt: 350
*.xlsx: 10
*.root: 162

Experiment RIBF139
*.dlt: 162
*.xlsx: 7
*.root: 101

YSO Tests 
Thresholds & calibrations



For HV between (500,600)V, the rate of visual scalers do not change. The current thresholds, 

Ch Thr
xa 130
xb 130
ya 130
yb 150
dy 90

Attachment 1: dynVSdynGated. 
>>Black, dyn signal
>>Red, dyn signal gated by 4 anodes (histo xpos)

PDF file attached with the preliminary analysis of the October 2017 AIDA in beam test.

Here attached the lise file for BRIKEN1

Here is a doc with an estimate of the statistical uncertainty P1n and P2n as a function of the number of implant-beta correlations for future experiments.

This will hopefully be useful for the new PAC proposals as an estimate for the time needed to measure a certain precision.

If there are any questions please feel free to email me (Charlie Rasco).

I roughly (~10%) checked the efficiency for 4 of the peaks from  171025_1222_1355_152EuCloverCal.root.

I checked the peaks at 122, 245, 344, and 1408. The indication is an efficiency of 6.9,  9,   9,8, and 2.6 % for these gamma rays repectively.

Previously the efficiency was 11.1, 7.1, 5.3, and 1.6% . This indicates a reduction in efficiency below ~200 keV (because of YSO) and otherwise there is an increase in efficiency from 40% at 245 keV and up to 65% at 1480 keV.

A more complete analysis will come later.

http://www.nishina.riken.jp/collaboration/SUNFLOWER/misc/util/ribfsource.html

G7 pulser weird behavior



Pulser signals G7Red & G7Green were crossed before the digitizer (the aluminium potato?)
Pulser removed from G7Red & G7Green

Background measurement
Start: 01:44
Run:   000
File:  171026_0144_bck_000.dlt
Stop:  

The presently used detector has 48x48x5 mm3 YSO array with 1x1mm2 segments. They are separated with ESR.  We use H8500 pspmt and 2 mm quartz diffuser with rough edges. Coupling is done with sylgard.  Anger logic uses a conventional resistive network with 1kohm and we have 4 position signals and dynode.  The position signals (xa,xb,ya,yb) are split in Low gain branch connected directly to 5V range input in Struck and High gain branch, which uses Phillips fast amplifier to boost the gain. The use of the amplifiers enables to operate the detector at low PSPMT gain and should give us a chance to work with the strong light produced by the implant.  The implant signals were simulated using blue diode and a pulse generator. We observed significant drift of the position for very large pulses, but this was for now attributed to be the pulse shape effect due to the use of the diode and reltively slow pulser.

YSO for now should run at -700 V.  The maximum operating voltage is 1200V and should not be exceeded. At 1200 V the ions induced signals may saturate our electronics.

Tuesday evening:

Detector remounted in the pedestal and aligned with WASABI with 1mm+1.5mm spacers. The pedestal is 25.8 mm tall and the box is 60 mm tall.  We checked also the orientation of the spectra and chose AIDA convention (look upstream). With this pedestal the front of the box is centered with the back of the clover leaf.

Wednestay morning:

I opened the detector and rewrapped it with new teflon tape. I noticed a small piece if sylgard peeled off, which may explain why the we had some edge effect yesterday. The detector was remounted on the new pedestal which will allow it to be positioned at the center of the clover.  The signals looked OK on the oscilloscope.

for energy calibration with 152Eu source

171024_1858_152Eu_G7.root
171024_2112_152Eu_D4.root

light pulser measurement
SN's pulse generator 20ns width

measurement of 137Cs with YSO 
after matching the gains of the 
HighGain channels


YSO detector was inside the black box, outside the matrix. 
The source was placed in front of the YSO

First measurement
Start: 15:14
End: 16:55
RootFile: 171023_1655_137CsYSO.root

Second measurement (same conditions )
Start: 16:55
Run number: 070
End:   17:41
File:     171023_1655_137CsYSO_070.dlt
RootFile: 171023_1655_1741_137CsYSO_070.root

The 137Cs source is weak; the rate of the YSO detector was about 50Hz (without source is 10Hz).

252Cf source in the middle of Wasabi and YSO in front of Clover D4

Start: 19:15
BRIKEN File: 171022_1915_252Cf_BrikenYSO_068.dlt
Wasabi File: prerun0029.evt

Stop: 19:24
BRIKEN File: 171022_1915_252Cf_BrikenYSO_069.dlt
Wasabi File: prerun0034.evt

Online file: 171022_1915_1924_252Cf_BrikenYSO.root

60Co source between YSO and Wasabi in front of D4 Clover
Briken configuration file: 171022_1811_Conf_BrikenFullYSO.xlsx WRONG!!!
Start: 18:25
BRIKEN File: 171022_1825_60Co_BrikenYSO_040.dlt
Wasabi File: prerun0007.evt

Stop: 18:37
BRIKEN File: 171022_1825_60Co_BrikenYSO_066.dlt
Wasabi File:prerun0007.evt

Hughe amount of data!?:
Ch1-4 have 100 samples/event
Ch1 Samples MAW was activated
Ch5-8 have TriggerGateLength=10000samples & 10000 samples/event


We make a new measurement:
New Configuration file: 171022_1846_Conf_BrikenFullYSO.xlsx

Start: 18:57
Briken file: 171022_1856_60Co_BrikenYSO_067.dlt
Wasabi File: prerun0022.evt

Stop:19:06
Briken file: 171022_1856_60Co_BrikenYSO_067.dlt
Wasabi File: prerun0027.evt

Root file: 171022_1857_1906_60Co_BikenYSO.root

Resolution check using 40K 1460 keV line 
in the background measurement overnight
(File: 171022_0126_1101_bck.root)

D4: 2.9 1keV @ 1461.8 keV
G7: 2.98 keV @ 1460.0 keV

We start a systematic check of YSO in BRIKEN DACQ

WE check and correct a configuration file for YSO alone
Conf file: 171022_1306_YSO_Conf.xlsx

First measurement: 
change the light pulser attenuation and check 
changes of X and Y position
Root file: 171022_1314_pulserAtCenter.root

We change configuration file to remove amplitude 
range condition to buil position
New configuration file:171022_1332_YSO_Conf.xlsx

Now start moving the light pulser position using a mask:

Light pulse position: Top Left Out
Root file: 171022_1335_pulseTopLeftOut.root

Light pulse position: Bottom Left Out
Root file: 171022_1341_pulseBottomLeftOut.root

Light pulse position: Bottom Right Out
Root file: 171022_1345_pulseBottomRightOut.root

Light pulse position: Top Right Out
Root file:171022_1350_pulseTopRightOut.root

Light pulse position: Top Left In
Root file: 171022_1401_pulseTopLetIn.root

Light pulse position: Bottom Left In
Root file: 171022_1406_pulseBottomLeftIn.root

Light pulse position: Bottom Right In
Root file: 171022_1410_pulseBottomRightIn.root

Light pulse position: Top Right In
Root file: 171022_1416_pulseTopRightIn.root

Now we ramp the PMT high voltage starting at 600V: 
600V, 650V, 700V, 750V, 800V, 900V, 950V, 1000V, 1050V, 1100V, 1150V
Pulser at Top Left Out
Root file: 171022_1445_HVramp_pulseTopLeftOut.root

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)