03-19-2015

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.