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 Mon Apr 16 16:23:09 2018, awade, DailyProgress, scatter, Beam size on trans BN detector 
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 Thu Apr 19 18:28:11 2018, rana, DailyProgress, scatter, Beam size on trans BN detector
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Sun Apr 22 22:00:15 2018, awade, DailyProgress, scatter, Switching out NF1811 detector for KA25MHz
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Message ID: 2174
Entry time: Thu Apr 19 18:28:11 2018
In reply to: 2172
Reply to this: 2176
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| Author: |
rana |
| Type: |
DailyProgress |
| Category: |
scatter |
| Subject: |
Beam size on trans BN detector |
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 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.
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