september 24, 20071 the ‘history’ program yi chih liu operation group taiwan light source
TRANSCRIPT
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September 24, 2007 1
The ‘history’ program
Yi Chih LiuOperation Group
Taiwan Light Source
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September 24, 2007 2
Outline
• Overview
• What can we do by using the program
• Applications
• Conclusion
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September 24, 2007 3
A quick glance of History program
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September 24, 2007 4
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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September 24, 2007 5
Single click for one day beam status
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September 24, 2007 6
Weekly report of machine operation
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September 24, 2007 7
User availability
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September 24, 2007 8
Statistics of the beam stability
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September 24, 2007 9
Statistics of the beam position
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September 24, 2007 10
Statistics of injection efficiency
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September 24, 2007 11
Applications of history program
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September 24, 2007 12
Display orbit in time sequence
Time
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September 24, 2007 13
Case study on spikes
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September 24, 2007 14
Spike analysis (1)Due to the beam size Y grows up.
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September 24, 2007 15
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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September 24, 2007 16
Data analysis for finding error source
RCVCPS10 RCVCPC10A
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September 24, 2007 17
Location of possible error source
SWLS
RCVCPS10 RCVCPS10A
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September 24, 2007 18
Problem treated by control group
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September 24, 2007 19
Trip events
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September 24, 2007 20
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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September 24, 2007 21
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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September 24, 2007 22
Quick check for a beam trip event
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September 24, 2007 23
Kicker 2
Beam trip caused by K2 misfire
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September 24, 2007 24
Conclusion
• Flexible and extendable
• A powerful diagnostic tool through linking other servers
• A platform for communication
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September 24, 2007 25
Thank you !
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September 24, 2007 26
-150 -100 -50 0 50 100 1500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
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
%100]}[{
]}[min{]}[max{)(
0
0
kAavg
kAkA
I
Ik
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September 24, 2007 27
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