40m QIL Cryo_Lab CTN SUS_Lab CAML OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  ATF eLog  Not logged in ELOG logo
 List  |  Find  |  Login  |  Help 
Entry  Sun Aug 1 23:16:45 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD? IMG_0248.pngIMG_0250.jpg
    Reply  Mon Aug 2 00:50:58 2010, Zach, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
       Reply  Mon Aug 2 12:24:01 2010, Dr. Evil, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
          Reply  Mon Aug 2 14:15:10 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
       Reply  Mon Aug 2 16:11:41 2010, Homer, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
    Reply  Mon Aug 2 21:02:19 2010, Dmass, Lab Infrastructure, General, PMC Waist PMCwaist.pdf
    Reply  Fri Aug 6 14:12:22 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD? H1NPROoutput.PNGH1NPROat21in.PNGH1NPRO120mW.PNG
       Reply  Fri Aug 6 16:56:58 2010, Aidan, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
       Reply  Sat Aug 7 13:45:52 2010, Dmass, Lab Infrastructure, General, WHERE IS THE WINCAMD? 
Message ID: 910     Entry time: Fri Aug 6 16:56:58 2010     In reply to: 909
Author: Aidan 
Type: Lab Infrastructure 
Category: General 
Subject: WHERE IS THE WINCAMD? 

Looks like Hurricane Dmass.

Quote:

Quote:

I was trying to understand why the mode matching through the PMC was so bad (I got 30 mW transmitted with 120 mW input).

  • I looked at the mode on the PMC REFL camera, and it did not look very guassian.
  • I changed the laser current from 2 A to 2.2 A (what Rick said they ran it at at LHO) and saw no change in the mode
  • I tried to take a beamscan...but could not find the WINCAMD and its computer (again.) I checked the usual suspects (PSL/TCS) and didn't see it.

So. Who knows where the wincamD is?

added: pics of PMC REFL before and after locking, in order

Totally possible that my mode matching is just that crappy? Maybe.

I did take beam scans of the mode going into the PMC just before aligning to it for the final time. I can do so again to get real profiles and characterize the H1NPRO

 Here are some scans of the beam with the winCAMD. I had a reflective ND filter on for these (hence some of the fringing).

  1. 5-10 inches in front of NPRO (through mirror transmission)
  2. 21 inches in front of NPRO (maybe junk b/c of ND filter? Maybe not?)
  3. Downstream of: HWP and PBS to get 120 mW total (about 8% power), and some focusing lenses (this was at PMC waist). I think this is the "junk light" you get from an NPRO. Maybe this is a lot of power to have in junk, maybe not?

 

ELOG V3.1.3-