Difference between revisions of "03-24-2015"

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HV's
 +
 +
Det6 -1600V
 +
 +
Det5 -1600V
 +
 +
PS -1000V
 +
 +
Det1 -1381V
 +
 +
Det2 -1407V
 +
 +
Det3 -1400V
 +
 +
Det4 -1400V
 +
 
{| border="1"
 
{| border="1"
 
| Run #|| Description  
 
| Run #|| Description  
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| 8779 || 100 mA peak current, 20 mV LED, HEU in, radiator in, collimator hole unblocked, beam dump for electrons =>  gamma in  pulses (TDC24), artificial double pulse is in data steram
 
| 8779 || 100 mA peak current, 20 mV LED, HEU in, radiator in, collimator hole unblocked, beam dump for electrons =>  gamma in  pulses (TDC24), artificial double pulse is in data steram
 
|-
 
|-
−
| 8783 || 100 mA peak current, 20 mV LED, HEU in, radiator in, collimator hole unblocked, beam dump for electrons =>  scaler counts multihit events Ntot(Scaler) = /per run, Ntot(TDC4(neutrons + photons)) = /per run, artificial double pulse is in data steram in the  
+
| 8783 || 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel.
 +
|-
 +
| 8784 || 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 1" of Pb in front. Scaler is connected to TDC21.
 +
N(trig pulses) = 89,836;
 +
N(scaler) = 173,857;
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N(TDC21) = 2,588;
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N(scaler)/N(TDC21) = 67/1;
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N(gamma) = 2485;
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N(trig pulses)/N(gamma) = 36/1
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|-
 +
| 8785 || 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21.
 +
N(trig pulses) = 102,603;
 +
N(scaler) = 171,916;
 +
N(TDC21) = 754;
 +
N(scaler)/N(TDC21) = 228;
 +
N(gamma) = 653;
 +
N(trig pulses)/N(gamma) = 157/1;
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|-
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|}
 +
 
 +
 
 +
;changed leading edge discriminator N841 to non-updating (non-retrigerable) in order to stop widening of output pulse in the event of a double pulse.
 +
 
 +
{| border="1"
 +
| Run #|| Description
 +
|-
 +
| 8785 || 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21.
 +
N(trig pulses) = 102,603
 +
N(scaler) = 171,916
 +
N(TDC21) = 754
 +
N(scaler)/N(TDC21) = 228
 +
|-
 +
| 8786 || 100 mA peak current, 50 mV LED, pulse width on the LED set to 255 "ns" (40 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21.
 +
N(trig pulses) = n/a
 +
N(scaler) = n/a
 +
N(TDC21) = n/a
 +
N(scaler)/N(TDC21) = n/a
 +
|-
 +
| 8787 || 100 mA peak current, 50 mV LED, pulse width on the LED set to 255 "ns" (40 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21 and is not gated.
 +
N(trig pulses) = 34,156
 +
N(scaler) = 17809
 +
N(TDC21) = 99
 +
N(scaler)/N(TDC21) = 179/1
 +
|-
 +
| 8788 || 100 mA peak current, 50 mV LED, pulse width on the LED set to 255 "ns" (40 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21 and is not gated.
 +
N(trig pulses) = 61888
 +
N(scaler) = 25034
 +
N(TDC21) = 198
 +
N(scaler)/N(TDC21) = 126/1
 
|-
 
|-
 
|}
 
|}

Latest revision as of 23:53, 24 March 2015

HV's

Det6 -1600V

Det5 -1600V

PS -1000V

Det1 -1381V

Det2 -1407V

Det3 -1400V

Det4 -1400V

Run # Description
8768 10 mV LED
8769 20 mV LED
8770 20 mV LED, no target, radiator in, shielding changed on the beam left side, 1 gamma per 22 pulses (TDC30), 1 gamma in 3 pulses (TDC24)
8771 20 mV LED, no target, no radiator, shielding changed on the beam left side, 1 gamma per 33 pulses (TDC30), 1 gamma in 6 pulses (TDC24)
8772 20 mV LED, no target, no radiator, collimator hole is blocked from both the accelerator side (4" of lead) and the experimental hall (3.5" of lead) => 1 gamma per 46 pulses (TDC30), 1 gamma in 7 pulses (TDC24)
8773 20 mV LED, no target, radiator in, collimator hole is blocked from both the accelerator side (4" of lead) and the experimental hall (3.5" of lead) => 1 gamma per 29 pulses (TDC30), 1 gamma in 3 pulses (TDC24), positron scaler 69(e+) per minute (44 e+'s background)
8774 20 mV LED, no target, radiator in, collimator hole unblocked, beam dump for electrons => 1 gamma per 33 pulses (TDC30), 1 gamma in 3 pulses (TDC24)
8775 100 mA peak current, 20 mV LED, DU cyl in, radiator in, collimator hole unblocked, beam dump for electrons => 1 gamma in 2 pulses (TDC24), 2n per 500 pulses (TDC24) (corrected for the efficiency, taking into account we loose some neutrons due multi hit)
8779 100 mA peak current, 20 mV LED, HEU in, radiator in, collimator hole unblocked, beam dump for electrons => gamma in pulses (TDC24), artificial double pulse is in data steram
8783 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel.
8784 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 1" of Pb in front. Scaler is connected to TDC21.

N(trig pulses) = 89,836; N(scaler) = 173,857; N(TDC21) = 2,588; N(scaler)/N(TDC21) = 67/1; N(gamma) = 2485; N(trig pulses)/N(gamma) = 36/1

8785 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21.

N(trig pulses) = 102,603; N(scaler) = 171,916; N(TDC21) = 754; N(scaler)/N(TDC21) = 228; N(gamma) = 653; N(trig pulses)/N(gamma) = 157/1;


changed leading edge discriminator N841 to non-updating (non-retrigerable) in order to stop widening of output pulse in the event of a double pulse.
Run # Description
8785 100 mA peak current, 20 mV LED, pulse width on the LED set to 0 "ns" (6 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21.

N(trig pulses) = 102,603 N(scaler) = 171,916 N(TDC21) = 754 N(scaler)/N(TDC21) = 228

8786 100 mA peak current, 50 mV LED, pulse width on the LED set to 255 "ns" (40 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21.

N(trig pulses) = n/a N(scaler) = n/a N(TDC21) = n/a N(scaler)/N(TDC21) = n/a

8787 100 mA peak current, 50 mV LED, pulse width on the LED set to 255 "ns" (40 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21 and is not gated.

N(trig pulses) = 34,156 N(scaler) = 17809 N(TDC21) = 99 N(scaler)/N(TDC21) = 179/1

8788 100 mA peak current, 50 mV LED, pulse width on the LED set to 255 "ns" (40 ns according to scope), HEU in, radiator in, collimator hole unblocked, beam dump for electrons, artificial double pulse is in data steram in the trig delay channel. Det 5 an6 are covered with 3" of Pb in front. Scaler is connected to TDC21 and is not gated.

N(trig pulses) = 61888 N(scaler) = 25034 N(TDC21) = 198 N(scaler)/N(TDC21) = 126/1


2nCor_44

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