Beam Test Jul 26 2012

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Tune

Energy Switch Out (High En)
Solenoid 1 13.9 A
Solenoid 2 4.1 A
Gun Hor -0 A
Gun Ver +0.2 A
Output Hor -0.3 A
Output Ver -0 A
Rep Rate 17
Gun HV 10 (Knob Setting)
Gun Grid Voltage 10 (Knob Setting)
RF frequency 2856.321 MHz
Modulator HV Power Supply 4.19 (Knob Setting)
RF macro Pulse Length (FWHM) 300 ns
Q1 (A) -3
Q2 (A) +0.8
Q3 (A) +2
Q4 (A) 0
Q5 (A) 0
Q6 (A) 0
Current at FC0 96 mA


DAQ runs

TDC CH5 was a delay of (32+16+8+4+2+1+0.5)+ (16+8+4+2+1+0.5) = 95 nano second.

run# T1 T2 Sweep Magnet logic HV-D2L HV-D1R Reprate start stop Int Rate comments
3679 in in out (DL & GunTrig) or (DR & GunTrig) 1060V 1080V 100 08:48:00 09:28:01 42.3 events/s ADC12 has Sintilator1 (Sint @ exit of 90 deg).
3680 in OUT out (DL & GunTrig) or (DR & GunTrig) 1060V 1080V 100 09:29:37 09:46:19 42.6 events/s ADC12 has Sintilator1 (Sint @ exit of 90 deg).
3682 in OUT out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 09:55:20 10:33:56 4.8884 events/s TDC cable was upside down, now it is flipped. Sintilator left was put to CH9.
3683 in IN out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 10:36:03 10:53:48 5.9397 events/s TDC5->beam left
3684 in IN out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 10:54:19 11:25:01 8.7974 events/s TDC3->beam right, TDC5->beam left
3685 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 11:26:43 11:31:01 18 events/s junk, rate are too high.

We changed the discriminator from Octal discriminator (LeCroy modle 623B) to 8 CH Constant Fraction Discriminator (CFD) (CAEN model N842). The threshold on the detector beam left is 29, and on the detector right is 31.

Following is the image of coincidence of left and right detectors using this CFD.

Hrrl pos 26jul2012 FADC coincidence.png


run# T1 T2 Sweep Magnet logic HV-D2L HV-D1R Reprate start stop Int Rate Connections comments
3686 in in out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 11:54:44 12:15:44 (1260 s) 4.8262 events/s TDC3->DL, TDC->DR
3687 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 12:19:15 12:43:14 (1411 s) 3.6 events/s TDC3->DL, TDC5->DR
3688 in in out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 12:44:09 13:25:09 (2460 s) 4.9743 events/s TDC3->DL, TDC12->DR switched DR from TDC5 to TDC12
3689 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 13:27:23 14:12:29 (2706 s) 3.3156 events/s TDC3->DL, TDC12->DR CFD out-put of DL (to TDC9) and DR (to TDC10) connected to TDC. (Connected to the top row of LeCroy Model 4616.)
3690 in in out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 14:13:16 15:23:44 (4228 s) at the beginning was 4.9 then later changed to 13.5111 events/s TDC3->DL, TDC12->DR CFD out-put of DL (to TDC9) and DR (to TDC10) connected to TDC. (Connected to the seond row of LeCroy Model 4616.)
3691 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 14:13:16 16:36:19 14.2079 events/s TDC3->DL, TDC12->DR High voltage of scintilator at 90 deg exit set to 1300 V. Scintlator at 90 deg moved to CH13.
3692 in in in (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 16:40:18 17:00:56 23.9270 events/s TDC3->DL, TDC12->DR
3694 in in in (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 10 events/s TDC3->DL, TDC12->DR
3696 in in in (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 17:30:08 17:31:39 10 events/s TDC3->DL, TDC12->DR

Data Analysis

comparing r3686 and r3687

r3686 and r3687: Detector on the right

Hrrl pos 26jul2012 data ana comp r3686 r3687 DR.png

Hrrl pos 26jul2012 data ana comp r3686 r3687 DR2.png


r3686 and r3687: Detector on the left

Hrrl pos 26jul2012 data ana comp r3686 r3687 DL.png

Hrrl pos 26jul2012 data ana comp r3686 r3687 DL2.png

r3686 and r3687: in subtract out

Hrrl pos 26jul2012 data ana comp r3686 r3687 sub.png


Hrrl pos 26jul2012 data ana comp r3686 r3687 sub 511.png

e+ estimate

e+ rate: 0.3619 Hz


e- rate:

Rough e- estimate

[math] I = \frac{Q}{t} = \frac{V}{R}[/math]

[math] Q = \frac{Vt}{R}[/math]


According to: [Calibration]

[math]Vt = 1.201~\mu Vs[/math]


[math] Q = \frac{1.201~\mu Vs}{50 \Omega }[/math] = 24.02 nC

Electron charges per second under 100 Hz reprate is: 100Q/s = 2402 nC/s.

Unit charge: [math]1.602 \times 10^{-19}[/math]C.

Number of electrons per second: [math]\frac{2402~nC/s }{1.602 \times 10^{-19}~C} = 1.5 \times 10^{13} [/math] Hz.


e+/e- estimate

[math]\frac{0.3619~Hz }{1.5 \times 10^{13} ~Hz } = 0.24 \times 10^{-13} = 2.4 \times 10^{-14} [/math]

comparing r3688 and r3689

Detector on the right: Hrrl pos 26jul2012 data ana comp r3688 r3689 DR.png

Hrrl pos 26jul2012 data ana comp r3688 r3689 DR2.png

Detector on the left: Hrrl pos 26jul2012 data ana comp r3688 r3689 DL.png

Hrrl pos 26jul2012 data ana comp r3688 r3689 DL2.png


r3688 and r3689: in subtract out

Hrrl pos 26jul2012 data ana comp r3688 r3689 sub.png


Hrrl pos 26jul2012 data ana comp r3688 r3689 sub 511.png

rough estimate on e-/e+ ratio

e- rate: 0.3916 Hz

e+ rate (from above): [math] 1.5 \times 10^{13} [/math] Hz.

e-/e+ = [math] 0.3916 / 1.5 \times 10^{13} = 2.6 \times 10^{-14} [/math]


e- estimate with ADC9

Hrrl pos 26jul2012 data ana comp r3688 ADC9.png


Hrrl pos 26jul2012 data ana comp r3688 ADC9 Fit Par.png


Gaussian fit center is at: 2077.77 +- 0.70


The calibration: 1.22 nV s /ADC channel

Thar area is: 2534.88 nV s


[math] Q = \frac{Vt}{R}[/math]

According to: [Calibration]

[math]Vt = 2.53488~\mu Vs[/math]


[math] Q = \frac{2.53488~\mu Vs}{50 \Omega }[/math] = 50.69 nC

Electron charges per second under 100 Hz reprate is: 100Q/s = 5069 nC/s.

Unit charge: [math]1.602 \times 10^{-19}[/math]C.

Number of electrons per second: [math]\frac{5069~nC/s }{1.602 \times 10^{-19}~C} = 3.16417 \times 10^{13} [/math] Hz.

Detector Calibrations

run# T1 T2 Sweep Magnet logic HV-D2L HV-D1R Reprate start stop Int Rate comments
3679 in in out (DL & GunTrig) or (DR & GunTrig) 1060V 1080V 100 08:48:00 09:28:01 42.3 events/s ADC12 has Sintilator1 (Sint @ exit of 90 deg).
3680 in OUT out (DL & GunTrig) or (DR & GunTrig) 1060V 1080V 100 09:29:37 09:46:19 42.6 events/s ADC12 has Sintilator1 (Sint @ exit of 90 deg).
3682 in OUT out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 09:55:20 10:33:56 4.8884 events/s TDC cable was upside down, now it is flipped. Sintilator left was put to CH9.
3683 in IN out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 10:36:03 10:53:48 5.9397 events/s TDC5->beam left
3684 in IN out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 10:54:19 11:25:01 8.7974 events/s TDC3->beam right, TDC5->beam left
3685 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 11:26:43 11:31:01 18 events/s junk, rate are too high.

We changed the discriminator from Octal discriminator (LeCroy modle 623B) to 8 CH Constant Fraction Discriminator (CFD) (CAEN model N842). The threshold on the detector beam left is 29, and on the detector right is 31.

Following is the image of coincidence of left and right detectors using this CFD.

Hrrl pos 26jul2012 FADC coincidence.png


run# T1 T2 Sweep Magnet logic HV-D2L HV-D1R Reprate start stop Int Rate Connections comments
3686 in in out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 11:54:44 12:15:44 (1260 s) 4.8262 events/s TDC3->DL, TDC->DR
3687 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 12:19:15 12:43:14 (1411 s) 3.6 events/s TDC3->DL, TDC5->DR
3688 in in out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 12:44:09 13:25:09 (2460 s) 4.9743 events/s TDC3->DL, TDC12->DR switched DR from TDC5 to TDC12
3689 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 13:27:23 14:12:29 (2706 s) 3.3156 events/s TDC3->DL, TDC12->DR CFD out-put of DL (to TDC9) and DR (to TDC10) connected to TDC. (Connected to the top row of LeCroy Model 4616.)
3690 in in out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 14:13:16 15:23:44 (4228 s) at the beginning was 4.9 then later changed to 13.5111 events/s TDC3->DL, TDC12->DR CFD out-put of DL (to TDC9) and DR (to TDC10) connected to TDC. (Connected to the seond row of LeCroy Model 4616.)
3691 in out out (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 14:13:16 16:36:19 14.2079 events/s TDC3->DL, TDC12->DR High voltage of scintilator at 90 deg exit set to 1300 V. Scintlator at 90 deg moved to CH13.
3692 in in in (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 16:40:18 17:00:56 23.9270 events/s TDC3->DL, TDC12->DR
3694 in in in (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 10 events/s TDC3->DL, TDC12->DR
3696 in in in (DL & GunTrig) AND (DR & GunTrig) 1150V 1150V 100 17:30:08 17:31:39 10 events/s TDC3->DL, TDC12->DR

Beam Current Calibration of Scint Left

Determine if the Beam Left Scintillator is linear with beam current.

run# Source HV-D2L HV-D1R start stop Int Rate Connections comments
3699 Na22 1150V 1150V 18:20:47 18:21:33 103.6 events/s TDC3->DL, TDC->DR A lot of error message saying no data in TDC and ADC.
3700 Na22 1150V 1150V 18:26:15 20:45:47 103.6 events/s TDC3->DL, TDC->DR





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