Latest revision as of 04:26, 25 June 2013

Tune

Energy Switch	Out (High En)
Solenoid 1	12.4 A
Solenoid 2	7.3 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	2856.315 MHz
Modulator HV Power Supply	4.19 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	-3
Q2 (A)	+0
Q3 (A)	+2
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0
Current at FC0	100 mA

Beam Current Calibration of Scint Left

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

Beam Current Calibration of Scint Left

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

run#

Scope Pics

FC1 area nVs

Scint L area nVs

Scint Left (Ch9)

ADC9 mean

Reprate

start

stop

Int Rate

comments

hist entries

events in scaler

3703

1127.75 .7

100

08:38:24

08:41:52 (208 s)

38.4 events/s

first measurement at full current

7853

7855

3705

782.5 1

100

09:01:10

09:04:29 ( s)

38.47 events/s

cut the current in half

7591

3706

239.1 0.6

100

09:08:40

09:12:13 ( s)

38 events/s

cut the current to its 1/4 th

8154

3707

100

09:16:19

09:21:24 ( s)

38.5 events/s

cut the current to its 1/8 th

11655

1. T1 out, disable D1 (Q4,Q5,Q6 too), send the beam to FC0, take scope image of the area.

2. T1 in, enable D1 (Q4,Q5,Q6 too), bend the beam by 90 deg, take a run with 1000 events.

1.22 nV s /ADC channel

Fit by Sadiq

run#    FC1 area (nVs)       ADC9 mean|| 
3703    1201.1 +- 10.1       1126  +- 0.8
3705    776.8 +- 112         791.8 +- 0.6
3706    367.7 +- 2.32        242.1 +- 0.3

1. Auto fit

[math] 1.063 \pm 0.013 [/math] nV s /ADC channel

Fixed point fit

In these fit, the point (0,0) introduced, and the line was forced to pass through this point. The slope was fitted by root.

1st try:

[math]0.789 \pm 0.004[/math] nV s /ADC channel

My fixed point fit

In these fit, the point (0,0) introduced, and the line was forced to pass through this point. I choose the slopes.

1st fit: [math] 0.94 [/math] nV s /ADC channel

2nd fit: [math] 0.91 [/math] nV s /ADC channel

So, the average and variance is: [math] 0.94 \pm 0.02 [/math] nV s /ADC channel

The average of these three types of fit

[math] 1.063 \pm 0.013 [/math] nV s /ADC channel

[math] 0.789 \pm 0.004[/math] nV s /ADC channel

[math] 0.94 \pm 0.02 [/math] nV s /ADC channel

The average is 0.9306. The variance is 0.1372.

So, The calibration is: [math] 0.93 \pm 0.14 [/math] nV s /ADC channel

Energy calibration of Scint 1

With T1 ande T2 out, send 1,2,6, and 10 MeV electrons to Scintillator 1 located at the end of the 90 degree beam line

HV=1300

run#	Electron Energy (MeV)	Attenuation (dB)	ADC2
3714	10	27.5	3009
3715	6	27.5	2935
3716	4	27.5	3018

Inserted gun triggers into Scaler channel 2

Resume positron production using 10 MeV eletrons

Insert Gun trigger into VME scaler

Set D2 for 2 MeV

D1 is set to 4.2 Amps, and D2 is set to 4.41 Amps.

run#

T1

T2

Sweep Magnet

logic

HV-D2L

HV-D1R

Reprate

start

stop

Run time (s)

Int Rate

comments

event

pulses

3719

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

11:03:02

11:21:58

1136

4.2 events/s

206540 beam pulses

4890

206540

3720

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

11:29:52

11:44:55

903

5.069 events/s

181148 beam pulses

4566

181148

3721

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

12:02:31

12:17:32

901

3.9 events/s

180559 beam pulses

3601

180559

3722

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

12:28:13

12:49:47

1294

5.3933 events/s

268067 beam pulses

6962

268067

3724

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

13:00:34

13:21:44

1270

4.6719 events/s

Threshold on the DL is set to 52. it was 29.

5984

255841

3725

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

13:23:03

13:38:04

901

3.1237 events/s

2823

188179

3726

in

(DL & GunTrig) & (DR & GunTrig)

1150V

200

13:41:55

13:57:00

905

3.7244 events/s

sweeping magnet in

3378

180767

during run 3725 the following were lugged into the TDC

TDC0 = Gun trigger TDC1 = ~95 ns delayed Gun trigger TDC5=N aI Left TDC7 = NaI Right TDC9 = NaI Left (CFD) TDC10 = NaI Right (CFD)

Preliminary results with no cuts

Set D2 for 1 MeV

D1 and D2 set to 2.6 Amps

run#

T1

T2

Sweep Magnet

logic

HV-D2L

HV-D1R

Reprate

start

stop

Int Rate

comments

events

pulses

3727

in

(DL & GunTrig) & (DR & GunTrig)

1150V

200

13:58:53

14:14:01 (908 s)

3.3208 events/s

sweeping magnet in

3028

181271

3728

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

14:16:56

14:33:35 (999 s)

4.0302 events/s

sweeping magnet out

4028

199458

3729

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

14:34:31

14:50:14 (941 s)

3.2572 events/s

3104

188160

3730

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

14:51:24

15:07:44 (980 s)

4.1088 events/s

4052

195527

3731

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

200

15:08:28

15:26:02 (1054 s)

3.1478 events/s

3356

210375

Set D2 for 3 MeV

D1 and D2 set to 5.8 Amps

run#

T1

T2

Sweep Magnet

logic

HV-D2L

HV-D1R

Reprate

start

stop

Int Rate

event number

pulses

3735

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

15:54:24

16:11:06 (1002 s)

9.0200 events/s

9045

301462

3736

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

16:12:15

16:27:07 (892 s)

4.1736 events/s

3752

268289

3737

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

16:28:05

16:46:19 (1094 s)

14.2679 events/s

15361

329368

3 MeV runs duration

7-27-12 >stat r3735.dat
 File: `r3735.dat'
 Size: 2588672   	Blocks: 5072       IO Block: 4096   regular file
Device: 902h/2306d	Inode: 17448       Links: 1
Access: (0644/-rw-r--r--)  Uid: (  500/     daq)   Gid: (  500/     daq)
Access: 2012-07-27 15:54:21.000000000 -0600
Modify: 2012-07-27 16:11:05.000000000 -0600
Change: 2012-07-30 13:00:05.000000000 -0600

16:11:05 - 15:54:21 = 1004 s

7-27-12 >stat r3736.dat
 File: `r3736.dat'
 Size: 1081344   	Blocks: 2128       IO Block: 4096   regular file
Device: 902h/2306d	Inode: 17470       Links: 1
Access: (0644/-rw-r--r--)  Uid: (  500/     daq)   Gid: (  500/     daq)
Access: 2012-07-27 16:12:12.000000000 -0600
Modify: 2012-07-27 16:27:06.000000000 -0600
Change: 2012-07-30 13:00:05.000000000 -0600

16:27:06 - 16:12:12 = 894 s

7-27-12 >stat r3737.dat
 File: `r3737.dat'
 Size: 4489216   	Blocks: 8800       IO Block: 4096   regular file
Device: 902h/2306d	Inode: 17468       Links: 1
Access: (0644/-rw-r--r--)  Uid: (  500/     daq)   Gid: (  500/     daq)
Access: 2012-07-27 16:28:02.000000000 -0600
Modify: 2012-07-27 16:46:18.000000000 -0600
Change: 2012-07-30 13:00:05.000000000 -0600

16:46:18 - 16:28:02 = 1096 s

Set D2 for 4 MeV

D1 and D2 at 7.5 Amps.

run#

T1

T2

Sweep Magnet

logic

HV-D2L

HV-D1R

Reprate

start

stop

Int Rate

events

pulses

3738

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

16:47:31

17:00:10 (759 s)

12.2042 events/s

9235

227946

3739

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

17:00:51

17:15:06 (855 s)

1.9458 events/s

1659

256885

Set D2 for 5 MeV

D1 and D2 at 9.2 Amps.

run#

T1

T2

Sweep Magnet

logic

HV-D2L

HV-D1R

Reprate

start

stop

Int Rate

events

pulses

3740

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

17:17:03

17:25:31 (507 s)

2.8924 events/s

1459

152406

3741

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

17:26:15

17:36:27 (612 s)

1.7331 events/s

1078

183903

Rotating Target Simulation

We want to know what happens when the tungsten target on the motor rotates and electron beam misses the target when there is a gap between target(s) .

Dipole magnets and quad magnets are set to 2 MeV positron mode.

run#

T1

T2

Sweep Magnet

logic

HV-D2L

HV-D1R

Reprate

start

stop

Int Rate

events

pulses

3734

out

in

out

(DL & GunTrig) & (DR & GunTrig)

1150V

300-301

15:37:40

15:52:23 (883 s)

1.1425 events/s

1004

265105

Look for positrons using 6 MeV electrons

6 MeV electron on T1. Measure scintillator out put as function of slit distance, in electron mode. Set 2 MeV at D1 and D2. At 30 Hz reprate.

3rd Tuning (6 MeV)

Energy Switch	In (Low En Range)
Solenoid 1	6.9 A
Solenoid 2	9.3 A
Gun Hor	-0.1 A
Gun Ver	0 A
Output Hor	0.5 A
Output Ver	0.3 A
Rep Rate	10
Gun HV	10 (Knob Setting)
Gun Grid Voltage	10(Knob Setting)
RF frequency	2856.780 MHz
Modulator HV Power Supply	3.71 (Knob Setting)
RF macro Pulse Length (FWHM)	300 ns
Q1 (A)	0
Q2 (A)	0
Q3 (A)	0
Q4 (A)	0
Q5 (A)	0
Q6 (A)	0

Measured window width is screen (Gating on the scope is set to "Screen" mode).

Slit Width = 3.65 cm:

Slit Width = 3 cm:

Slit Width = 2.5 cm:

Slit Width = 2 cm:

Slit Width = 1.5 cm:

Slit Width = 1 cm:

Slit Width = 0.5 cm:

Slit Width = 0.2 cm:

Check pulse number

Check event number

source CODA/setup

cd data

xcefdmp

viewfile->Data Source r2838.dat // need to be dat file, not root file.

enter big event number to: Event Num

then go to one event earlier to get last event number.

Check pulse number

To check the number of pulses in this run:

view file->go to last pulse-> view prevous -> ROC2-> 0x260

Wiring

Magnet Mapping

  Dipole   En Predictions of 
  Coil     Matrix    MATLAB
  Current  Inversion Polyfit
  (Amps)   (MeV)     (MeV)

  2.4000    0.8870    0.8870
  2.5000    0.9510    0.9510
 2.6000    1.0149    1.0149
  2.7000    1.0787    1.0787
  2.8000    1.1424    1.1424

  4.0000    1.8985    1.8985
  4.1000    1.9608    1.9608
 4.2000    2.0230    2.0230
  4.3000    2.0852    2.0852
 4.4000    2.1472    2.1472
  4.5000    2.2091    2.2091
  4.6000    2.2710    2.2710

  5.6000    2.8836    2.8836
  5.7000    2.9443    2.9443
 5.8000    3.0049    3.0049
  5.9000    3.0654    3.0654
  6.0000    3.1257    3.1257

  7.3000    3.9014    3.9014
  7.4000    3.9604    3.9604
 7.5000    4.0192    4.0192
  7.6000    4.0780    4.0780
  7.7000    4.1366    4.1366
  7.8000    4.1952    4.1952

  9.0000    4.8896    4.8896
  9.1000    4.9468    4.9468
 9.2000    5.0039    5.0039
  9.3000    5.0609    5.0609
  9.4000    5.1178    5.1178

Data Analysis

HRRL_Pos_Test_27Jul2012_Data_Ana_1_MeV

HRRL_Pos_Test_27Jul2012_Data_Ana_2_MeV

HRRL_Pos_Test_27Jul2012_Data_Ana_3_MeV

HRRL_Pos_Test_27jul2012_Data_Ana_4_MeV

HRRL_Pos_Test_27jul2012_Data_Ana_5_MeV

Back of the envelope calculation for e+/e- ratio

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Difference between revisions of "Beam Test Jul 27 2012"

Latest revision as of 04:26, 25 June 2013

Contents

Tune

Beam Current Calibration of Scint Left

Beam Current Calibration of Scint Left

Fit by Sadiq

1. Auto fit

Fixed point fit

My fixed point fit

The average of these three types of fit

Energy calibration of Scint 1

Resume positron production using 10 MeV eletrons

Set D2 for 2 MeV

Set D2 for 1 MeV

Set D2 for 3 MeV

3 MeV runs duration

Set D2 for 4 MeV

Set D2 for 5 MeV

Rotating Target Simulation

Look for positrons using 6 MeV electrons

3rd Tuning (6 MeV)

Check pulse number

Check event number

Check pulse number

Wiring

Magnet Mapping

Data Analysis

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