40m
QIL
Cryo_Lab
CTN
SUS_Lab
TCS_Lab
OMC_Lab
CRIME_Lab
FEA
ENG_Labs
OptContFac
Mariner
WBEEShop
|
PSL |
Not logged in |
 |
|
Mon Apr 16 16:23:09 2018, awade, DailyProgress, scatter, Beam size on trans BN detector  
|
Thu Apr 19 18:28:11 2018, rana, DailyProgress, scatter, Beam size on trans BN detector
|
Sun Apr 22 22:00:15 2018, awade, DailyProgress, scatter, Switching out NF1811 detector for KA25MHz
|
|
Message ID: 2174
Entry time: Thu Apr 19 18:28:11 2018
In reply to: 2172
Reply to this: 2176
|
Author: |
rana |
Type: |
DailyProgress |
Category: |
scatter |
Subject: |
Beam size on trans BN detector |
|
|
This beam is WAY too big for the PD. If the beam radius (wz) is 100 microns and the PD active area diameter is 300 microns, than you're always scattering a lot of beam off of the metal of the can. For new focus 1811, the beam radius should be ~30-50 microns.
|