40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  OMC elog  Not logged in ELOG logo
Entry  Fri Dec 13 14:59:18 2019, Stephen, General, General, OMC Beam Dump Production Cure Bake IMG_6080.JPGIMG_6079.JPG
    Reply  Wed Dec 18 21:54:53 2019, Koji, General, General, OMC Beam Dump Production Cure Bake P_20191218_160650_vHDR_On.jpegP_20191218_160705_vHDR_On.jpegP_20191218_160733_003.jpeg
       Reply  Mon Sep 28 16:03:13 2020, rana, General, General, OMC Beam Dump Production Cure Bake 
          Reply  Mon Sep 28 16:13:08 2020, Koji, General, General, OMC Beam Dump Production Cure Bake 
Message ID: 393     Entry time: Mon Sep 28 16:03:13 2020     In reply to: 388     Reply to this: 394
Author: rana 
Type: General 
Category: General 
Subject: OMC Beam Dump Production Cure Bake 
are there any measurements of the BRDF of these things? I'm curious how much light is backscattered into the incoming beam and how much goes out into the world.

Maybe we can take some camera images of the cleaned ones or send 1-2 samples to Josh. No urgency, just curiosity.

I saw that ANU and also some labs in India use this kind of blue/green glass for beam dumps. I don't know much about it, but I am curious about its micro-roughness and how it compares to our usual black glass. For the BRDF, I think the roughnesss matters more for the blackness than the absorption.

ELOG V3.1.3-