Difference between revisions of "Bubble Chamber Meeting Wednesday August 5, 2015"
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1- Bubble Chamber progress at JLab | 1- Bubble Chamber progress at JLab | ||
| − | 2- Laser Shuttering | + | 2- Laser Shuttering: |
* Would like to use a mechanical shutter (100% extinction) | * Would like to use a mechanical shutter (100% extinction) | ||
** John Hansknecht will build a control box that uses TLL signal on BNC cable (TTL=high=close=beam OFF, TLL=low=open=beam ON) | ** John Hansknecht will build a control box that uses TLL signal on BNC cable (TTL=high=close=beam OFF, TLL=low=open=beam ON) | ||
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** repurposes cell in optical path, so more invasive and more work installing HV driver, control circuit) | ** repurposes cell in optical path, so more invasive and more work installing HV driver, control circuit) | ||
| − | 3. | + | 3. Beam test of 5D line in the week of August 10 |
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Revision as of 17:18, 5 August 2015
We will meet in TL 2221 on Wednesday August 5 at 3:30 pm EST.
For those calling in we'll use the Blue Jeans [1] audio conference system.
Phone number: 1-888-240-2560 Meeting ID: 3528502673# Moderator Passcode: 5978# Meeting URL: http://bluejeans.com/3528502673
Agenda:
1- Bubble Chamber progress at JLab
2- Laser Shuttering:
- Would like to use a mechanical shutter (100% extinction)
- John Hansknecht will build a control box that uses TLL signal on BNC cable (TTL=high=close=beam OFF, TLL=low=open=beam ON)
- LST400: on-hand, time to open (~30ms), time to close (~30ms), large aperture 8mm
- LST202: purchase, time to open (~1.3ms), time to close (~1.5ms), small aperture 2.3mm (recommend <1mm beam)
- Alternatively use an electro-optic shutter (>1000:1 extinction, but fast rise/fall times <5ns)
- repurposes cell in optical path, so more invasive and more work installing HV driver, control circuit)
3. Beam test of 5D line in the week of August 10