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| . Draft zip file of specs in .doc format: attachment:40mCOC-080723.zip | . Draft zip file of specs in .doc format: attachment:40mCOC-080723.zip (need to change the ext to .doc) . Also in [javascript:void(0);/*1254859239474*/ [PDF]] |
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| . Specs of the folding mirrors for the recycling cavities | . Specs of the folding mirrors for the recycling cavities |
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| . [[Upgrade 08/Optics/RCParams|Considerations on the parameters of PRC/SRC]] | . [[Upgrade 08/Optics/RCParams|Considerations on the parameters of PRC/SRC]] |
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Coatings and Optics
This is a work in progress area for what optic and coatings we need.
Parameter |
ITMs |
ETMs |
PRM |
SRM |
FM (4x) |
HR Transmission 1064 nm |
0.014 * |
10 ppm |
0.055 +/-0.003 |
0.10 +/- 0.005 |
<0.01 |
HR Transmission 532 nm |
< 1000 ppm |
0.10 |
n/a |
n/a |
n.r. |
AR Reflection 1064 nm |
< 1000 ppm |
< 100 ppm |
< 300 ppm |
< 300 ppm |
<0.01 |
AR Reflection 532 nm |
<0.01 |
< 1000 ppm |
n/a |
n/a |
|
ROC |
Flat (>5 km) |
57.5 m? |
115.5 96.3 +50/-0 (96**) |
142 117.1+50/-20 (116.3**) |
inf |
Wedge angle |
1 deg (+/- 0.2 deg) |
1 deg |
1 deg |
1 deg |
1 deg |
BRBR*T_ITMnom = 0.014 +/- 0.002. All 3 ITMs in the same coating run to match the T, i.e. T_ITMY - T_ITMX < 0.0003. Tolerance in T_ITMnom is larger.** Based on ETM and ITM ROC, assuming inf. thin optics.
- Draft zip file of specs in .doc format: attachment:40mCOC-080723.zip (need to change the ext to .doc)
- Also in [javascript:void(0);/*1254859239474*/ [PDF]]
- Specs of the folding mirrors for the recycling cavities
Name |
PR1 |
PR2 |
SR1 |
SR2 |
Size |
2"dia. X 3/8" thick |
2"dia. X 3/8" thick |
2"dia. X 3/8" thick |
2"dia. X 3/8" thick |
Incident angle |
2.5 deg |
36.5 deg |
39.9 deg |
17.1 deg |
HR Transmission 1064 nm |
500ppm |
< 100 ppm |
< 100ppm |
< 100ppm |
AR Reflection 1064 nm |
< 0.25% |
< 0.25% |
< 0.25% |
< 0.25% |
ROC |
Flat |
Flat |
Flat |
Flat |
Wedge angle |
1 deg |
1 deg |
1 deg |
1 deg |
Qty. |
2 |
2 |
2 |
2 |
Communication between ATF and Coastline
From: Gene Lapp Sent: Tuesday, July 28, 2009 4:00 PM To: Ramin Lalezari Cc: Vern Korn; John Tardif (E-mail) Subject: Power Recycling Mirrors / Signal Recycling Mirrors Ramin, I've run across another small problem with the Power Recycling & Signal Recycling Mirrors. The wedge angle is called out as 2° 30' ± 5'. The parts are measuring between 2° 40' and 2° 44' (all ± 0.5'). We have traced this problem to an error in our wedge tool, which is nominally at 2° 40'. All the mirrors have been measured except for one Signal Recycling Mirror (currently on the polishing machine). I expect that it will be in the same condition. The measurements are as follows: PRMU01 2° 40' PRMU02 2° 42' PRMU03 2° 43' PRMU04 2° 40' (extra) SRMU01 - SRMU02 2° 41' SRMU03 2° 41' SRMU04 2° 44' (extra)