Difference between revisions of "HRRL 03-17-2011"
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= Results = | = Results = | ||
== Q1 == | == Q1 == | ||
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| + | At lower current background subtraction gets worse, because singal/noise drops. | ||
=== 42 mA, Positive Current, X projection === | === 42 mA, Positive Current, X projection === | ||
Revision as of 05:03, 14 April 2011
Accelerator Tuning
Good Tune Used for good Scan
By Dr. Kim
| Solenoid 1 | 6.8 A |
| Solenoid 2 | 10.4 A |
| Gun Ver | -0.2 A |
| Gun Hor | +0.4 A |
| Output Hor | -1.4A |
| Output Ver | -0.5 A |
| Gun HV | +9.75 (Knob Setting) |
| Gun Grid Voltage | 5.25 (Knob Setting) |
| RF frequency | 2855.816 MHz |
| Modulator HV Power Supply | 4.42 (Knob Setting) |
| RF macro Pulse Length (FWHM) | 200 ns |
| Peak Current on FC | 37.2 mAmps |
| Scope on FC | 
|
| e- Beam Energy | 14 MeV
|
Calibration
| image | OTR image | cal_h (mm/px) | cal_v (mm/px) |
 |
 |
0.04308 | 0.04204 |
 |
 |
0.04320 | 0.04228 |
 |
 |
0.04349 | 0.04181 |
 |
 |
0.04323 | 0.04196 |
 |
 |
0.04337 | 0.04212 |
| mean (mm/px) | mean (mm/px) | ||
Results
Q1
At lower current background subtraction gets worse, because singal/noise drops.
42 mA, Positive Current, X projection
emit=0.389 +- 0.001 mm*mrad, emit_norm=10.658 +- 0.034 mm*mrad
beta=1.28826 +- 0.00004, alpha=0.9378 +-0.0007
42 mA, Negative Current, Y projection
emit=0.269 +- 0.001 mm*mrad, emit_norm=7.370 +- 0.024 mm*mrad
beta=0.9271 +- 0.0001, alpha=0.1922 +-0.0005
20 mA, Positive Current, X projection
emit=0.231 +- 0.001 mm*mrad, emit_norm=6.334 +- 0.020 mm*mrad
beta=0.6619 +- 0.0000, alpha=0.0639 +-0.0003
emit=0.231 +- 0.001 mm*mrad, emit_norm=6.334 +- 0.020 mm*mrad
beta=0.661930 +- 0.000000, alpha=0.06386 +-0.00034
10 mA, Positive Current, X projection
emit=0.489 +- 0.002 mm*mrad, emit_norm=13.408 +- 0.043 mm*mrad
beta=1.30289 +- 0.00000, alpha=1.1231 +-0.0007
emit=0.325 +- 0.001 mm*mrad, emit_norm=8.896 +- 0.029 mm*mrad
beta=1.319524 +- 0.000000, alpha=-0.05069 +-0.00069