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  OPERATION-2023 logbook, Contact: F.Wolff-Fabris, A.Galler, L.Samoylova, H.Sinn  Not logged in ELOG logo
Message ID: 4     Entry time: 17 Jan 2023, 10:25
Author: Jan Gruenert 
Group: PRC 
Subject: Issue 
SASE3 peration issue - SOLVED
 
Controls issue, the machine cannot make beam in SASE3.
From BKR / DOOCS the problem description is: Big Brother is blocking SASE3 beam due to an EPS power limit of 0 Watt.

Looking into the SASE3 karabo topic, many devices are not instantiated, ATT #1.
The state of the PREABS  preabsorber is not known and it is not found in the device topology either.
 
SA3_XTD10_PREABS/DCTRL/OPEN.off
SA3_XTD10_PREABS/SWITCH/OUT_BEAM_1.state
SA3_XTD10_PREABS/DCTRL/LED_POWER
SA3_XTD10_PREABS/DCTRL/OPEN.state
 
Info to DRC and PRCs.
Two actions resolved the issue for now:
- XO changed in karabo the EPS power limits to the values used before the WMP (40 W).
- PRC and VAC instantiated the EPS-loop PLC devices
 
If this fully resolves the problem will be known when the machine will try to make beam again (now switching to hybrid 10 Hz / 5 Hz mode).
 
Another small problem at BKR is that the 3 big wall monitors are now working (ticket to ITDM issued).
Attachment 1: JG_SASE3_no_beam_permission_2023-01-17_09-13-31.png  411 kB  | Show | Show all
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