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 Mon Jun 3 22:36:07 2013, rana, Update, LSC, ALS-TRY_OUT needs anti-whitening 
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 Tue Jun 4 16:04:34 2013, Annalisa, Update, LSC, ALS-TRY_OUT needs anti-whitening
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Tue Jun 4 17:28:09 2013, Annalisa, Update, LSC, C1:ALS-TRY_OUT filter and green progress
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Tue Jun 4 21:50:23 2013, Annalisa, Update, LSC, C1:ALS-TRY_OUT filter and green progress
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Wed Jun 5 14:01:37 2013, rana, Update, LSC, C1:ALS-TRY_OUT filter and green progress
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Wed Jun 5 15:03:42 2013, Annalisa, Update, LSC, C1:ALS-TRY_OUT filter and green progress
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Wed Jun 5 14:43:42 2013, Annalisa, Update, LSC, ALS-TRY_OUT DQ channels
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Message ID: 8680
Entry time: Wed Jun 5 15:03:42 2013
In reply to: 8677
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| Author: |
Annalisa |
| Type: |
Update |
| Category: |
LSC |
| Subject: |
C1:ALS-TRY_OUT filter and green progress |
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| Quote: |
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The rejected beam from this Faraday comes out at a tiny, tiny angle and so its tough to pick it off without clipping the main beam.
Some care must be taken in setting this up - Steve may have some good ideas on what kind of mount can be placed so close to the beam.
Why did we ever order this terrible Faraday? Let's never get a Faraday with a tiny angle between the beams again.
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The rejected beam from the Faraday is steered with a mirror into the PDA32A PD and a 75mm fl lens is used to focus the beam into it.
The main beam is a few millimeters away from the mirror mount (maybe 2mm), and I think it should be fine as long as the main beam is not supposed to move.
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