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

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

September 24, 2007 5

Single click for one day beam status

September 24, 2007 6

Weekly report of machine operation

September 24, 2007 7

User availability

September 24, 2007 8

Statistics of the beam stability

September 24, 2007 9

Statistics of the beam position

September 24, 2007 10

Statistics of injection efficiency

September 24, 2007 11

Applications of history program

September 24, 2007 12

Display orbit in time sequence

Time

September 24, 2007 13

Case study on spikes

September 24, 2007 14

Spike analysis (1)Due to the beam size Y grows up.

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

September 24, 2007 16

Data analysis for finding error source

RCVCPS10 RCVCPC10A

September 24, 2007 17

Location of possible error source

SWLS

RCVCPS10 RCVCPS10A

September 24, 2007 18

Problem treated by control group

September 24, 2007 19

Trip events

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

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

September 24, 2007 22

Quick check for a beam trip event

September 24, 2007 23

Kicker 2

Beam trip caused by K2 misfire

September 24, 2007 24

Conclusion

• Flexible and extendable

• A powerful diagnostic tool through linking other servers

• A platform for communication

September 24, 2007 25

Thank you !

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

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