Download - September 24, 20071 The ‘history’ program Yi Chih Liu Operation Group Taiwan Light Source
September 24, 2007 1
The ‘history’ program
Yi Chih LiuOperation Group
Taiwan Light Source
September 24, 2007 2
Outline
• Overview
• What can we do by using the program
• Applications
• Conclusion
September 24, 2007 3
A quick glance of History program
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Purpose of history program
• Monitoring electron beam properties
• Monitoring photo beam stability
• Tracing of machine parameters
• Analyzing the correlation of machine parameters variation
• Calculating the merit of operation statistics for user shift
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Single click for one day beam status
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Weekly report of machine operation
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User availability
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Statistics of the beam stability
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Statistics of the beam position
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Statistics of injection efficiency
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Applications of history program
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Display orbit in time sequence
Time
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Case study on spikes
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Spike analysis (1)Due to the beam size Y grows up.
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Spike analysis (2)
spikes passive signal driven bythe GFB vs. error source
response to the active source
GFB ON
The spike was caused by the malfunction of the SWLS
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Data analysis for finding error source
RCVCPS10 RCVCPC10A
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Location of possible error source
SWLS
RCVCPS10 RCVCPS10A
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Problem treated by control group
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Trip events
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9/11-5:8:4(1852)19.568 PSI15.038 PSI0.025 A
9/11-5:8:3(1851)15.472 PSI14.859 PSI259.837 A
Nitrogen increased
IASW trip event traced by history program
iaswaghp trip level @18.5 PSIiaswagnp trip level @16 PSI
In Achromat Superconducting Wiggler (IASW)
Data analyzed from o.1 Hz database
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4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90100200300
SID Trip Event on 06-Sep-2007 05:09:16m
A Beam Current
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90
1020
Vol
t
LS218 Trip
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90
1020
Vol
t
Coil Trip
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90
1020
Vol
t
Pressure Trip
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90100200300
A IASW MPSI RD
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9-10
010
Vol
t
IASW Vdiff
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90
1020
Vol
t
IASW QD OUT
4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.90
1020
Sec
Vol
t
IASW PLC INT
IASW Trip Event on 11-Sep-2007 05:09:16
Cause of IASW-R6 trip from fast recorder
Pressure interlock active
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Quick check for a beam trip event
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Kicker 2
Beam trip caused by K2 misfire
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Conclusion
• Flexible and extendable
• A powerful diagnostic tool through linking other servers
• A platform for communication
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Thank you !
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-150 -100 -50 0 50 100 1500
0.1
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1blue dotted-->Pinhole(d=50um) scanning, red solid--> Beam size at the Pinhole (1s=27um)
Vertical distance (um)
Inte
nsity
(N
orm
aliz
ed)
A reliable indicator for monitoring beam quality
• Reproducible• Comparable• Simple optics
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0
0
kAavg
kAkA
I
Ik
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Check sequence for poor beam quality
• Check the beam stability from bpm archive• Check the monitor system from the
intensity distribution of pinhole position• Check the performance of feedback
systems from beam spectrum and beam size
• Check the correlation between orbit feedback and the change of I.D. position
• Check the correlation between orbit display and the ripples of power supplies
• Perform the real time signal trend to find the correlation