Difference between revisions of "Beam Test Jul 24 2012"

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(Created page with ' {| border="1" | Energy Switch || Out (High En) |- | Solenoid 1 || 6.7 A |- | Solenoid 2 || 1.5 A |- | Gun Hor || +0.3 A |- | Gun Ver || -0 A |-…')
 
 
(13 intermediate revisions by the same user not shown)
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= Tune =
−
 
 
 
{| border="1"
 
{| border="1"
 
| Energy Switch || Out (High En)
 
| Energy Switch || Out (High En)
Line 20: Line 19:
 
|  Gun HV  ||  10 (Knob Setting)
 
|  Gun HV  ||  10 (Knob Setting)
 
|-
 
|-
−
|  Gun Grid Voltage  ||  2.85 (Knob Setting)
+
|  Gun Grid Voltage  ||  10 (Knob Setting)
 
|-
 
|-
 
|  RF frequency  ||2856.243 MHz
 
|  RF frequency  ||2856.243 MHz
Line 34: Line 33:
 
|Q3  (A)|| +2
 
|Q3  (A)|| +2
 
|-   
 
|-   
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|Q4  (A)|| -2
 +
|- 
 +
|Q5  (A)|| +0.8
 +
|- 
 +
|Q6  (A)|| +2
 +
|-
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| Current at FC0 || 32 mA
 
|}
 
|}
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 +
= Switching T2 =
 +
 +
Originally, for T2 we used a thick target from Alfa Aesar. Dimension of the target is 25x50mm, with thickness of 2.0 mm (0.08 inch), 99.95% (metals basis).
 +
 +
We realized most photons can not travel through the target and go into the NaI detectors.
 +
 +
So, we switched T2 to the thinner target [[https://wiki.iac.isu.edu/index.php/HRRL_Positrons_Jul_2012_Runs_Setup#Targets  thinner_target]] from MIDWEST TUNGSTEN SERVICE. With Dimension of 0.040" x 1.50" x1.50".
 +
 +
= Calibration runs with sources =
 +
 +
 +
run# Source HV-DL HV-DR Pulser-period start-time end-time
 +
3553  Na-22 1082V 1223V 20 micro-sec  19:01:34  19:58:29
 +
3554  Na-22 1082V 1223V 5  micro-sec  20:00:50  20:11:32
 +
3557  Na-22 1082V 1223V 10 micro-sec 
 +
3558  Na-22 1082V 1223V 10 micro-sec 
 +
3559  Na-22 1150V 1150V 10 micro-sec
 +
 +
 +
run# Source HV-DL HV-DR  start-time end-time
 +
3659  Na-22 1150V 1150V  20:56:28  21:17:04
 +
3660  Na-22 1200V 1200V  21:19:12  23:54:11
 +
3661  Na-22 1100V 1100V  23:55:40
 +
 +
 +
==Fit for run 3659 Detector Left==
 +
[[File:hrrl_pos_25jul2012_fit_Na22_r3659_DL.png | 400 px]]
 +
 +
FCN=103.893 FROM MIGRAD    STATUS=CONVERGED      80 CALLS          81 TOTAL
 +
                    EDM=2.79556e-08    STRATEGY= 1      ERROR MATRIX ACCURATE
 +
  EXT PARAMETER                                  STEP        FIRST 
 +
  NO.  NAME      VALUE            ERROR          SIZE      DERIVATIVE
 +
  1  Constant    1.00983e+01  5.71803e-01  2.14796e-03  -4.37889e-04
 +
  2  Mean        9.59542e+02  2.82634e+00  1.41234e-02  -1.14806e-05
 +
  3  Sigma        6.19726e+01  2.65427e+00  5.40892e-05  -1.71544e-03

Latest revision as of 23:25, 30 July 2012

Tune

Energy Switch Out (High En)
Solenoid 1 6.7 A
Solenoid 2 1.5 A
Gun Hor +0.3 A
Gun Ver -0 A
Output Hor -0.4 A
Output Ver +0 A
Rep Rate 11
Gun HV 10 (Knob Setting)
Gun Grid Voltage 10 (Knob Setting)
RF frequency 2856.243 MHz
Modulator HV Power Supply 4.19 (Knob Setting)
RF macro Pulse Length (FWHM) 300 ns
Q1 (A) -2
Q2 (A) +0.8
Q3 (A) +2
Q4 (A) -2
Q5 (A) +0.8
Q6 (A) +2
Current at FC0 32 mA

Switching T2

Originally, for T2 we used a thick target from Alfa Aesar. Dimension of the target is 25x50mm, with thickness of 2.0 mm (0.08 inch), 99.95% (metals basis).

We realized most photons can not travel through the target and go into the NaI detectors.

So, we switched T2 to the thinner target [thinner_target] from MIDWEST TUNGSTEN SERVICE. With Dimension of 0.040" x 1.50" x1.50".

Calibration runs with sources

run# Source HV-DL HV-DR Pulser-period start-time end-time
3553  Na-22 1082V 1223V 20 micro-sec  19:01:34   19:58:29
3554  Na-22 1082V 1223V 5  micro-sec  20:00:50   20:11:32
3557  Na-22 1082V 1223V 10 micro-sec  
3558  Na-22 1082V 1223V 10 micro-sec  
3559  Na-22 1150V 1150V 10 micro-sec



run# Source HV-DL HV-DR  start-time end-time
3659  Na-22 1150V 1150V  20:56:28   21:17:04
3660  Na-22 1200V 1200V  21:19:12   23:54:11
3661  Na-22 1100V 1100V  23:55:40


Fit for run 3659 Detector Left

Hrrl pos 25jul2012 fit Na22 r3659 DL.png 

FCN=103.893 FROM MIGRAD    STATUS=CONVERGED      80 CALLS          81 TOTAL
                    EDM=2.79556e-08    STRATEGY= 1      ERROR MATRIX ACCURATE 
 EXT PARAMETER                                   STEP         FIRST   
 NO.   NAME      VALUE            ERROR          SIZE      DERIVATIVE 
  1  Constant     1.00983e+01   5.71803e-01   2.14796e-03  -4.37889e-04
  2  Mean         9.59542e+02   2.82634e+00   1.41234e-02  -1.14806e-05
  3  Sigma        6.19726e+01   2.65427e+00   5.40892e-05  -1.71544e-03
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