Transcript Loss Viewer 2 - XAL application Alexander Zhukov SNS Managed by UT-Battelle

Loss Viewer 2 - XAL application
Alexander Zhukov
SNS
Managed by UT-Battelle
for the Department of Energy
BLMs at SNS
How we use BLMs
1.Prevent instant loss
high power
2.Limit activation
3.Tune the machine
4.Measure residual
activation during down
time
5.Measure “intentional
loss”
Total number > 360!
BLM system is a crucial part of MPS – the last line
of defense against uncontrolled beam loss
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What are operator/physicist requirements?
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Overall bar-plot view of the whole machine
BLM must be labeled on bar-plot with its name (not some number)
MPS Limits
Different normalizations (over beam charge, limit etc)
Export losses to a file
IOC software is hard to change due to formal administrative procedures
History in some form
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LossViewer2 application
• Client side - no IOC modifications
• XAL application shares common
LAF with other apps
• Standard XAL optics file
• Configurable detector sets (D’nD)
• JFreechart for plotting
• Axis dedicated to detector type
• Show/hide button for limits
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Table pane and Drag’n’Drop
Plot pane
Table pane
for selection
and details
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Dynamic table view
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Normalizations
• Normalizations can be reasonably combined (e.g. charge and distance)
• User can select to use rolling average instead of signal itself
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Weighed history
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Waterfall plot
Custom widget
not Jfreechart
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MPS limits for RTBT
Limit
selection
startegy
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BLM statistics
• XAL service collects data into
ORACLE
• Web application loads it and
generates report
• Constant time for generating
report regardless time period
covered by report less than 15
seconds
• Data available since Jan 2007
• Time resolution one minute
• History plot available as well
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Summary
 LossViewer2 is an XAL application that
displays losses in different forms
 Good example of using XAL framework
 Currently it is one of the most used
applications in Control Room
 Satisfies (more or less) both physicists and
operators
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