|
|
| Line 1: |
Line 1: |
| =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 || ||
| |
| |-
| |
|
| |
| |}
| |