PePPO 03132012: Difference between revisions
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=Accelerator Configuration= | |||
;Accelerator Settings | |||
{| border="1" | |||
| beam energy || 6.8 MeV | |||
|- | |||
| Beam type: || Electron | |||
|- | |||
| I_average: || 0.3 nA | |||
|- | |||
| I_peak: || 0.05<math> \mu</math> A 0.006 duty factor | |||
|- | |||
| pulse width:|| 10 <math>\mu</math>s (it seems on 200 <math> \mu</math>s is possible?) | |||
|- | |||
| Rate:|| 60 Hz | |||
|- | |||
| PEPPO Spectrometer:|| 151.3 A | |||
|- | |||
|} | |||
= Set HV to Detectors = | |||
{| border="1" |cellpadding="20" cellspacing="0 | |||
|- | |||
| || Signal channel || HV dac || HV (V) | |||
|- | |||
| Detectors #1 || A1 || 2.4 || 960 | |||
|- | |||
| Detectors #2 || A2 || 3.0 || 1200 | |||
|- | |||
|} | |||
[https://positron.jlab.org/wiki/index.php/PEPPo_Annihilation_Counter_Descriptions#Turning_on_HV_PS How to turn HV On] | |||
=Scope Pictures= | |||
CH1: Beam Sync | |||
CH2: A1 | |||
CH3: A2 | |||
{| border="1" |cellpadding="20" cellspacing="0 | |||
|- | |||
| Target|| Pictures | |||
|- | |||
| No Target || [[File:1_03132012_AnnhCountScopePic.png| 200 px]] [[File:2_03132012_AnnhCountScopePic.png| 200 px]] | |||
|- | |||
| Chromox Target|| [[File:3_03132012_AnnhCountScopePic.png| 200 px]] [[File:4_03132012_AnnhCountScopePic.png| 200 px]] | |||
|} | |||
= 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 | |||
{| 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) | |||
|- | |||
| 2902 || sample || 5 minutes || e<math>^-</math> || Chromox || (Det1 OR Det2) || 50 || 2.4/960 || 3/1200 || || | |||
|- | |||
| 2903 || sample || 5 minutes ||e<math>^-</math> || Empty || (Det1 OR Det2) || 50 || 2.4/960 || 3/1200 || || | |||
|- | |||
| 2905 || sample || 10 minutes || e<math>^-</math> || Chromox || Det1 AND Det2|| 50 || 2.4/960 || 3/1200 || || | |||
|- | |||
| 2904 || sample || 15 minutes ||e<math>^-</math> || Empty || Det1 AND Det2 || 50 || 2.4/960 || 3/1200 || || | |||
|- | |||
| 2908 || sample || 30 minutes After Beam Studies end || off || out || (Det1 or Det2) || 50 || 2.4/960 || 3/1200 || || | |||
|- | |||
| 2909 || sample || 30 minutes After Beam Studies end || off || out || (Det1 AND Det2) || 50 || 2.4/960 || 3/1200 || || | |||
|- | |||
|} | |||
Revision as of 01:34, 14 March 2012
Accelerator Configuration
- Accelerator Settings
| beam energy | 6.8 MeV |
| Beam type: | Electron |
| I_average: | 0.3 nA |
| I_peak: | 0.05[math]\displaystyle{ \mu }[/math] A 0.006 duty factor |
| pulse width: | 10 [math]\displaystyle{ \mu }[/math]s (it seems on 200 [math]\displaystyle{ \mu }[/math]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 | Beam | Target | Trig Logic | VME discriminator Threshold (mV) | HV1 (setting/V) | HV2 (setting/V) | PL (setting/ns) | PTW (setting/ns) |
| 2902 | sample | 5 minutes | e[math]\displaystyle{ ^- }[/math] | Chromox | (Det1 OR Det2) | 50 | 2.4/960 | 3/1200 | ||
| 2903 | sample | 5 minutes | e[math]\displaystyle{ ^- }[/math] | Empty | (Det1 OR Det2) | 50 | 2.4/960 | 3/1200 | ||
| 2905 | sample | 10 minutes | e[math]\displaystyle{ ^- }[/math] | Chromox | Det1 AND Det2 | 50 | 2.4/960 | 3/1200 | ||
| 2904 | sample | 15 minutes | e[math]\displaystyle{ ^- }[/math] | Empty | Det1 AND Det2 | 50 | 2.4/960 | 3/1200 | ||
| 2908 | sample | 30 minutes After Beam Studies end | off | out | (Det1 or Det2) | 50 | 2.4/960 | 3/1200 | ||
| 2909 | sample | 30 minutes After Beam Studies end | off | out | (Det1 AND Det2) | 50 | 2.4/960 | 3/1200 |