Difference between revisions of "Bubble Chamber Meeting Wednesday August 5, 2015"
Jump to navigation
Jump to search
Line 15: | Line 15: | ||
* 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) | ||
− | ** [http://nmlaser.com/products/laser-shutters/lst400/ LST400]: on-hand, time to open (~ | + | ** [http://nmlaser.com/products/laser-shutters/lst400/ LST400]: on-hand, time to open (~30 ms), time to close (~30 ms), large aperture 8 mm |
− | ** [http://nmlaser.com/products/laser-shutters/lst202/ LST202]: purchase, time to open (~1. | + | ** [http://nmlaser.com/products/laser-shutters/lst202/ LST202]: purchase, time to open (~1.3 ms), time to close (~1.5 ms), small aperture 2.3 mm (recommend <1 mm beam) |
− | * Alternatively use an electro-optic shutter (>1000:1 extinction, but fast rise/fall times < | + | * Alternatively use an electro-optic shutter (>1000:1 extinction, but fast rise/fall times <5 ns) |
** 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) | ||
Line 36: | Line 36: | ||
* Laser Shutter: | * Laser Shutter: | ||
− | # We decided on shutter LST400 | + | # We decided on shutter LST400 with 30 ms open/close response time. |
# Do we have the LabView TLL plug-in module? | # Do we have the LabView TLL plug-in module? |
Revision as of 10:24, 6 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# 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 (~30 ms), time to close (~30 ms), large aperture 8 mm
- LST202: purchase, time to open (~1.3 ms), time to close (~1.5 ms), small aperture 2.3 mm (recommend <1 mm beam)
- Alternatively use an electro-optic shutter (>1000:1 extinction, but fast rise/fall times <5 ns)
- 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 [2]
Notes from this meeting:
- Bubble Chamber:
- Laser Shutter:
- We decided on shutter LST400 with 30 ms open/close response time.
- Do we have the LabView TLL plug-in module?