Difference between revisions of "03-19-2015"
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| + | =Analog Timing signals= | ||
| + | ==Scope picture== | ||
[[File:03_19_2015_BLUB.jpg | 500 px]] | [[File:03_19_2015_BLUB.jpg | 500 px]] | ||
| − | Raw TDC spectrum corresponding to the above scope picture: | + | ==Raw TDC spectrum corresponding to the above scope picture:== |
[[File:run8752_nocalibr.jpg | 500 px]] | [[File:run8752_nocalibr.jpg | 500 px]] | ||
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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 channel # 17 corresponds to Faraday Cup (channel #2 on the splitter). | QDC channel # 17 corresponds to Faraday Cup (channel #2 on the splitter). | ||
| − | '''run# 8753''': Production run with D2O target in: | + | ='''run# 8753''': Production run with D2O target in:= |
Puls width 2 ns | Puls width 2 ns | ||
| Line 31: | Line 33: | ||
Ee = 10.5 MeV | Ee = 10.5 MeV | ||
| − | Current: during the run | + | 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: | TOF spectra obtained during the run with the detector BLUB: | ||
| − | [[File: | + | [[File:TDC_17.png | 500 px]] |
| − | [[File: | + | [[File:TDC_16_2.png | 500 px]] |
| + | |||
| + | |||
| + | 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'' | ||
| + | |||
| + | [[File:QDC17_spectrum_8754.png | 500 px]] | ||
| + | |||
| + | QDC has a peak at 1116 channel. | ||
| + | |||
| + | ''Peak Current 300 mA, run 8755'' | ||
| + | |||
| + | [[File:QDC17_spectrum_8755.png | 500 px]] | ||
| + | |||
| + | QDC has a peak at 685 channel. | ||
| + | |||
| + | ''Peak Current 30 mA, run 8756'' | ||
| + | |||
| + | [[File:QDC17_spectrum_8756.png | 500 px]] | ||
| + | |||
| + | QDC has a peak at 112 channel. | ||
| + | |||
| + | ''Peak Current 100 mA, run 8757'' | ||
| + | |||
| + | [[File:QDC17_spectrum_8757.png | 500 px]] | ||
| + | |||
| + | QDC has a peak at 289 channel. | ||
Latest revision as of 20:36, 26 February 2016
Analog Timing signals
Scope picture
Raw TDC spectrum corresponding to the above scope picture:
Applying the calibration:
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] = 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
QDC has a peak at 1116 channel.
Peak Current 300 mA, run 8755
QDC has a peak at 685 channel.
Peak Current 30 mA, run 8756
QDC has a peak at 112 channel.
Peak Current 100 mA, run 8757
QDC has a peak at 289 channel.