Difference between revisions of "Beam Test Jul 24 2012"
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| + | = Tune = | ||
{| border="1" | {| border="1" | ||
| Energy Switch || Out (High En) | | Energy Switch || Out (High En) | ||
| Line 47: | Line 48: | ||
We realized most photons can not travel through the target and go into the NaI detectors. | We realized most photons can not travel through the target and go into the NaI detectors. | ||
| − | So, we switched T2 to the thinner target. | + | 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 = | = Calibration runs with sources = | ||
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
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