HRRL 4-13-09

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Default HRRL running Conditions

[math]I_{peak}[/math] Pulse Width Rep Rate Energy
8 mA 25 ns 1 Hz 3 MeV


run plan

Date Task
4/11/09 Vaho stil running til 7 pm, configure Motion Sliders
4/12/09 Build shutter and unstack beam line
4/13/09 Install Aluminum brick shutter and interlock with HRRL, test beam transport: Run HRRL accelerator from 3pm til 5 pm (25 ns pulse width, 3 MeV electrons, 1 Hz rep rate, 8 mA peak)
4/14/09 Repair Freon leak in Chiller, HRRL down, Install DAQ
4/15/09 Run HRRL from 3 pm til 5 pm (25 ns pulse width, 3 MeV electrons, 1 Hz rep rate, 8 mA peak), Do Plateau measurements and test readout
4/16/09 Run HRRL from 9 am til 5 pm (25 ns pulse width, 3 MeV electrons, 1 Hz rep rate, 8 mA peak), Do Plateau measurements and test readout
4/17/09 Run HRRL from 2 pm til 5 pm, position studies using Drift chamber and GEM
4/20/09 Run HRRL from 9 am til 5 pm finish detector tracking studies

4/13/09

Electron Dose tests

Shutter In

0.1 mrad/hr outside HRRL experimental door.

2.7 mrad/hr in the end of HRRL experimental hallway.

Shutter Out

0.1 mrad/hr in Dr. Forest office.

Sintillator tests

RS1 = 2 aluminum blocks are in front of Long BLue Scintillator plugged into the cable patch pannel 223A2

FS1 = Small scintillator is in 223A1


HV SC1 HV RS1 Desc.
840 840

GEM noise

100 ns RF pulse width

GEM in Accelerator room

Bag Rep Rate Current Peak to peak noise
Off No ground strap 990 Hz 3 V =60 mA [math]29 \pm 2[/math] mV on 1 mus scale ScopePic 4-13-09 3.png
Off + ground strap 990 Hz 3 V =60 mA [math] 72\pm 1[/math] mV on 1 mus scale ScopePic 4-13-09 4.png
on No Ground strap 990 Hz 4 V =80 mA [math] 42 \pm 2[/math] mV on 1 mus scale ScopePic 4-13-09 2.png
on + Ground strap 990 Hz 3 V =60 mA [math]66 \pm 2[/math] mV on 1 mus scale ScopePic 4-13-09 1.png
on + Ground strap + insulation 990 Hz 3 V =60 mA [math] 52\pm 30[/math] mV on 1 mus scale ScopePic 4-13-09 5.png

The insulation was placed between the mylar bag and the BNC conenctor on the HV board. The inside of the mylar bag is conducting. There is a film covering the outside of the mylar bag which prevents conduction test with voltmeter.

GEM in HRRL exp cell

Bag Rep Rate Current Peak to peak noise
Off No ground strap 990 Hz 3 V =60 mA [math] 46\pm [/math]1 mV on 1 mus scale ScopePic 4-13-09 3 HRRL exp cell.png
Off + ground strap 990 Hz 3 V =60 mA [math] \pm [/math] mV on 1 mus scale 50px
on No Ground strap 990 Hz 4 V =80 mA [math] \pm [/math] mV on 1 mus scale 50px
on + Ground strap 990 Hz 3 V =60 mA [math] \pm [/math] mV on 1 mus scale 50px
on + Ground strap + insulation 990 Hz 3 V =60 mA [math] 52 \pm 16[/math] mV on 1 [math]\mu[/math]s scale ScopePic 4-13-09 5 HRRL exp cell.png

The insulation was placed between the mylar bag and the BNC conenctor on the HV board. The inside of the mylar bag is conducting. There is a film covering the outside of the mylar bag which prevents conduction test with voltmeter.


FSC1ScopePic 4-13-09 1 HRRL exp cell.png FSC1ScopePic 4-13-09 2 HRRL exp cell.png

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