Difference between revisions of "PosRun 10 14 2013"
Jump to navigation
Jump to search
| Line 39: | Line 39: | ||
===40 MeV on Tungsten=== | ===40 MeV on Tungsten=== | ||
| + | |||
| + | 40 MeV electrons are hitting the positron production Tungsten target | ||
| + | |||
| + | |||
| + | |||
{| border="1" |cellpadding="20" cellspacing="0 | {| border="1" |cellpadding="20" cellspacing="0 | ||
| Line 44: | Line 49: | ||
| Run # || Run Duration (s) || Configuration | | Run # || Run Duration (s) || Configuration | ||
|- | |- | ||
| − | | 6503 || min s ( pulses) || same as | + | | 6503 || 3 min 46 s ( pulses) || Dipoles in positron mode. Al Brick in along 8 inch length |
| + | |- | ||
| + | | 6504 || min s ( pulses) || same as previou run, Al brick OUT | ||
|} | |} | ||
Revision as of 19:55, 14 October 2013
Run list
Scaler channel #2 counts the number of beam pulses
Detector 4 is Beam Left and in ADC channel 7, Ortec Dual Spec amp set to course=10, fine=39, Canberra CFD set to 85 mV lower threshold
Detector 1 is Beam Right and in ADC channel 3, Ortec Dual Spec amp set to course=20, fine=10, Canberra CFD set to 70 mV lower threshold
In-flight
| Run # | Run Duration (s) | Configuration |
| 6488 | min s | 2->60Hz rep rate, Looking at NaI in shielded cell at -600 Volts, Magnet on Accelerator side deflects electrons, Tungsten target is out, triggering only on the beam gate and looking at ADC channel 3 |
| 6489 | min s | same as above except: 120Hz rep rate, -500 Volts, |
| 6490 | min s | same as above except: -550 Volts, |
| 6491 | min s | same as above except: -575 Volts, |
| 6492 | min s | same as above except: inserted Aluminum brick to be sure electrons are staying on accelerator side, drops NaI output by factor of 2 |
| 6493 | min s | same as above except: -600 Volts |
| 6494 | min s | same as above except: -700 Volts |
| 6498 | min s | same as above except: -500 Volts, magnet out |
| 6499 | min s | same as above except: -700 Volts, very similar ADC spectrum for magnet in |
| 6500 | min s (54420 , 120 Hz pulses =453.5 sec) | same as above except: removed Al brick beam stop, increased current from zero until signal was observed in experimental cell NaI (probably mostly dark current from RF cavity) |
| 6501 | min s (54297 pulses) | same as above except: inserted Al brick beam stop, 
|
| 6502 | min s (54297 pulses) | same as above except: REmoved Al brick beam stop |
40 MeV on Tungsten
40 MeV electrons are hitting the positron production Tungsten target
| Run # | Run Duration (s) | Configuration |
| 6503 | 3 min 46 s ( pulses) | Dipoles in positron mode. Al Brick in along 8 inch length |
| 6504 | min s ( pulses) | same as previou run, Al brick OUT |
FC -vs- 90A beam stop correlation
FC = Aluminum brick 2" from exit window near NaI detectors
50 Ohm scope termination
| 90 A BS (nVs) | FC (nVs) |
| 47 | 25 |
| 24 | 11.9 |
| 13 | 6 |
| 6.1 | 2.3 |
| 4.8 | 1.8 |