Difference between revisions of "03-19-2015"

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Peak current 30 mA
 
Peak current 30 mA
  
QDC channel # 25 corresponds to BLUT (channel # 10 on the splitter).  
+
  QDC channel # 25 corresponds to BLUT (channel # 10 on the splitter).  
  
QDC channels [22,26] have cross talk issues.
+
QDC channels [22,26] have cross talk issues.
  
 
QDC channel # 17 corresponds to Faraday Cup (channel #2 on the splitter).
 
QDC channel # 17 corresponds to Faraday Cup (channel #2 on the splitter).
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TDC[17] = BLUB detector saw 81160 beam pulses for the above spectrum.  2964 of those pulses produced hits in the TDC.  The remaining beam pulses did not result in a signal in the detector.
+
TDC[17] = BLUB detector saw 81160 beam pulses for the above spectrum.  29640 of those pulses produced hits in the TDC.  The remaining beam pulses did not result in a signal in the detector.
218 Neutron candidates were present in the 2964 pulses ( 218/81160 = 1n /372 pulses).  2746 photons were found out of the 2964 pulses (2746 / 81160 = 1 gamma / 27 pulses).
+
218 Neutron candidates were present in the 29640 pulses ( 218/81160 = 1n /372 pulses).  2746 photons were found out of the 29640 pulses (29422 / 81160 = 1 gamma / 3 pulses).
 
 
  
 
='''QDC spectra from Faraday Cup''':=
 
='''QDC spectra from Faraday Cup''':=

Latest revision as of 20:36, 26 February 2016

Analog Timing signals

Scope picture

03 19 2015 BLUB.jpg

Raw TDC spectrum corresponding to the above scope picture:

Run8752 nocalibr.jpg

Applying the calibration:

Run8752 calibr.jpg

Run8752 calibr fit.jpg

Accelerator parameters:

Pulse width 2 ns

Ee = 10.5 MeV

Peak current 30 mA

 QDC channel # 25 corresponds to BLUT (channel # 10 on the splitter). 

QDC channels [22,26] have cross talk issues.

QDC channel # 17 corresponds to Faraday Cup (channel #2 on the splitter).

run# 8753: Production run with D2O target in:

Puls width 2 ns

Ee = 10.5 MeV

Current: during the run the value of peak current was changed from 30 mA to 400 mA.

TOF spectra obtained during the run with the detector BLUB:

TDC 17.png

TDC 16 2.png


TDC[17] = BLUB detector saw 81160 beam pulses for the above spectrum. 29640 of those pulses produced hits in the TDC. The remaining beam pulses did not result in a signal in the detector. 218 Neutron candidates were present in the 29640 pulses ( 218/81160 = 1n /372 pulses). 2746 photons were found out of the 29640 pulses (29422 / 81160 = 1 gamma / 3 pulses).

QDC spectra from Faraday Cup:

Peak Current 500 mA, run 8754

QDC17 spectrum 8754.png

QDC has a peak at 1116 channel.

Peak Current 300 mA, run 8755

QDC17 spectrum 8755.png

QDC has a peak at 685 channel.

Peak Current 30 mA, run 8756

QDC17 spectrum 8756.png

QDC has a peak at 112 channel.

Peak Current 100 mA, run 8757

QDC17 spectrum 8757.png

QDC has a peak at 289 channel.