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Entry  Mon May 2 17:10:55 2011, steve, Update, SUS, PRM oplev 
    Reply  Tue May 3 16:20:13 2011, steve, Update, SUS, PRM & BS oplevs are ready P1070630.JPGP1070632.JPG
Message ID: 4616     Entry time: Tue May 3 16:20:13 2011     In reply to: 4599
Author: steve 
Type: Update 
Category: SUS 
Subject: PRM & BS oplevs are ready 


The returning spot diameter on the qpd ~10 mm. In order to reduce the spot size I moved the f 1145 mm lens toward the PRM ~ 25 cm. The spot size was reduced to ~8 mm, 3200 counts.

I'll try to find an other lens tomorrow.

 Atm 1,  PRM oplev inward path with 2 lens solution: 14 cm gap between F 1145 and F 1545 mm lenses. 

Atm 2,   The PRM beam size 3 mm and the beam  quality is still bad. The BS path only needed alignment.

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