Difference between revisions of "PePPO 03132012"
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{| border="1" |cellpadding="20" cellspacing="0 | {| border="1" |cellpadding="20" cellspacing="0 | ||
|- | |- | ||
| − | | Run#|| run mode|| Run length ||Beam||Target ||Trig Logic|| VME discriminator Threshold (mV)|| HV1 (setting/V) || HV2 (setting/V) || PL (setting/ns)|| PTW (setting/ns) | + | | Run#|| run mode|| Run length (sec)||Beam||Target ||Trig Logic|| VME discriminator Threshold (mV)|| HV1 (setting/V) || HV2 (setting/V) || PL (setting/ns)|| PTW (setting/ns) |
|- | |- | ||
| − | | 2902 || sample || | + | | 2902 || sample || || e<math>^-</math> || Chromox || (Det1 OR Det2) || 50 || 2.4/960 || 3/1200 || || |
|- | |- | ||
| − | | 2903 || sample || | + | | 2903 || sample || ||e<math>^-</math> || Empty || (Det1 OR Det2) || 50 || 2.4/960 || 3/1200 || || |
|- | |- | ||
| − | | 2905 || sample || | + | | 2905 || sample || || e<math>^-</math> || Chromox || Det1 AND Det2|| 50 || 2.4/960 || 3/1200 || || |
|- | |- | ||
| − | | 2904 || sample || | + | | 2904 || sample || ||e<math>^-</math> || Empty || Det1 AND Det2 || 50 || 2.4/960 || 3/1200 || || |
|- | |- | ||
| − | | 2908 || sample || | + | | 2908 || sample || || off || out || (Det1 or Det2) || 50 || 2.4/960 || 3/1200 || || |
|- | |- | ||
| − | | 2909 || sample || | + | | 2909 || sample || || off || out || (Det1 AND Det2) || 50 || 2.4/960 || 3/1200 || || |
|- | |- | ||
|} | |} | ||
Revision as of 01:35, 14 March 2012
Accelerator Configuration
- Accelerator Settings
| beam energy | 6.8 MeV |
| Beam type: | Electron |
| I_average: | 0.3 nA |
| I_peak: | 0.05 A 0.006 duty factor |
| pulse width: | 10 s (it seems on 200 s is possible?) |
| Rate: | 60 Hz |
| PEPPO Spectrometer: | 151.3 A |
Set HV to Detectors
| Signal channel | HV dac | HV (V) | |
| Detectors #1 | A1 | 2.4 | 960 |
| Detectors #2 | A2 | 3.0 | 1200 |
Scope Pictures
CH1: Beam Sync CH2: A1 CH3: A2
| Target | Pictures |
| No Target |  
|
| Chromox Target |  
|
Run Plan
- Signal Definitions for Trigger logic
- SYNC:=60 Hz sync pulse 200 micro seconds long
- Det1:= Annihilation Counter #1 (HV1)
- Det2:=Annihilation Counter #2 (HV2)
Please make the following measurements
| Run# | run mode | Run length (sec) | Beam | Target | Trig Logic | VME discriminator Threshold (mV) | HV1 (setting/V) | HV2 (setting/V) | PL (setting/ns) | PTW (setting/ns) |
| 2902 | sample | e | Chromox | (Det1 OR Det2) | 50 | 2.4/960 | 3/1200 | |||
| 2903 | sample | e | Empty | (Det1 OR Det2) | 50 | 2.4/960 | 3/1200 | |||
| 2905 | sample | e | Chromox | Det1 AND Det2 | 50 | 2.4/960 | 3/1200 | |||
| 2904 | sample | e | Empty | Det1 AND Det2 | 50 | 2.4/960 | 3/1200 | |||
| 2908 | sample | off | out | (Det1 or Det2) | 50 | 2.4/960 | 3/1200 | |||
| 2909 | sample | off | out | (Det1 AND Det2) | 50 | 2.4/960 | 3/1200 |