All SASE's - SEPS Interlock Test - Results, Status & Upcoming Schedule, posted by Raśl Villanueva-Guerrero on 25 Jan 2023, 08:40
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Dear all,
please find here a summary of the status on this critical topic provided yesterday evening (around 19:15) by Zunaira Ansari (extract from her
e-mail). |
Status, posted by Jan Gruenert on 23 Jan 2023, 10:43 
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Status of machine SASE tuning (just before switching off for monday maintenance):
11.5 GeV operation
SASE1
SASE2
SASE3
Photon
energy
7 keV
7 keV
700 eV
Max. obtained average pulse energy
3.25 mJ
1.35 |
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Issue, posted by Jan Gruenert on 22 Jan 2023, 18:40
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SASE1 blocked to 1 bunch/train by EPS interlock (sic, not 2 but 1) --- PARTIALLY RESOLVED
Several issues:
1) MODEM device is broken, in state UNKNOWN, see ATT#1 and ATT#2. Fixed with deinstatiating and then using BECKHOFF_ASSISTANT to re-instantiate. |
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Analyze and quantify the mispositioning of the new 4mm-aperture behind the undulator, posted by Jan Gruenert on 21 Jan 2023, 16:38
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Goal: Analyze and quantify the mispositioning of the new 4mm-aperture behind the undulator
Positions in tunnel:
ABSP4.2422.SA2 = ABSP4.CELL37.SA2 L_z position 2422.558m
Last closed undulator for this test is cell16 at 2294m (at end of |
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Issue, posted by Jan Gruenert on 17 Jan 2023, 10:25
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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 |
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Issue, posted by Jan Gruenert on 16 Jan 2023, 19:50
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Problem: Beam operation in SASE2 is prohibited by SEPS / MPS
Origin of problem: HED-CRL3
(this was already an issue during the past weekend) |
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CRL3: recalibration of y axis, test of x range and move to SEPS interlock trigger position, posted by karen appel on 16 Jan 2023, 16:01
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CRL3 arm 2, 5 and 9 were mecanically religned to the V groove and retracted to some y position.
The y motor position was recalibrated by moving the motor to the lower limit switch, moving it up by 0.5 mm and then recalibrating the motor
and encoder position to the former software limit position. |
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Status, posted by Theophilos Maltezopoulos on 16 Jan 2023, 11:33
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| I started the upstream XGMs in XTD2, XTD1, and XTD10. |