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| 40m Log |
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 Tue Apr 19 18:10:10 2022, Paco, Update, BHD, Part V of BHR upgrade - POX11 path, LO path, and ITMX Oplev 
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 Wed Apr 20 08:20:22 2022, Paco, Update, BHD, Part V of BHR upgrade - PR2 weirdness
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Wed Apr 20 18:50:03 2022, Koji, Update, BHD, Part V of BHR upgrade - PR2 weirdness
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Thu Apr 21 16:49:01 2022, Paco, Update, BHD, Part V of BHR upgrade - BS Oplev + LO1 offset
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Thu Apr 21 18:42:47 2022, Tega, Update, BHD, Part V of BHR upgrade - Align LO and AS beams to BHD BS
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Thu Apr 21 20:33:31 2022, Koji, Update, BHD, AS1 UR OSEM problem localized in the chamber
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Fri Apr 22 12:03:09 2022, Tega, Update, BHD, AS1 UR OSEM problem localized in the chamber
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Fri Apr 22 12:15:08 2022, Anchal, Update, BHD, Cable post installation
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Mon Apr 25 16:57:57 2022, Anchal, Update, BHD, Cable post installation
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Message ID: 16801
Entry time: Thu Apr 21 20:33:31 2022
In reply to: 16800
Reply to this: 16803
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| Author: |
Koji |
| Type: |
Update |
| Category: |
BHD |
| Subject: |
AS1 UR OSEM problem localized in the chamber |
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Tega and Paco reported that the UR OSEM of AS1 lost the response.
- I have checked the LED MON (left) of the satellite amp for AS1. CH1/2/3 had 5V -> This indicates that the OSEM LEDs are (most likely) functioning.
- Then I went to the ITMY flange and connected the OSEM emulator instead of the Dsub25 cable. The attachment shows that the UR OSEM LED/PD worked fine with the OSEM emulator. WIth the vacuum flange connected it lost the response.
This indicates that the AS1 UR OSEM problem is localized in the chamber. Please check if the DSUB pins are touching the table or something else.
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