Breakout Session: Controls
Controls Commissioning
Experience
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
First Beam
LCLS commissioned a
new injector with beam
AND commissioned a
new Control System
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Overview
This presentation summarizes which control
system components are currently working for the
injector commissioning phase
Screen shots from EPICS show functionality of
each system
Data from the Elog is shown to illustrate acquisition
Comments on what works and what doesn’t are
included
Summary includes lessons learned and what still
needs to be done
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Everything is accessible from this screen
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Beam line graphic used for most GUIs
e.g. injector vacuum summary
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
PPS Summary status displays
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
BCS Summary status display:
- Calibration of detectors not completed yet
- SubBooster Interface timing “difficult”
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
MPS
- working with SLC processor and timing
- ion chambers do trip beam
- several MPS inputs (limit switches on obstructions)
not available yet
screen
New optical fiber
Loss monitor
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Conventional facilities
- interfaced to EPICS controls
- gun LCW temp feedback working ok at 30 Hz
- need to add alarm interface for temperatures, flows etc.
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Timing System
- see separate presentation by S. Allison
- LCLS Event system and SLC Timing working in consort
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Laser Systems
- Image Acquisition and Steering Feedback
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Magnet Controls
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Low Level RF Control
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Gun RF Feedback in Operation
- closing the loop between PAD and PAC
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
RF Phase Scans
Data acquired with
Matlab
April 16-17, 2007
LCLS FAC
Data acquired with
SCP Correlation Plot
(diagnose a satellite peak from laser)
Patrick Krejcik
pkr@slac.stanford.edu
Profile monitors
- control and diagnostics through EDM screens
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Image acquisition with Matlab
Gun spectrometer YAG Profile Monitor Screen
• Using physicist’s scripts up till now
• ImageManager package coming online now
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Beam Position Monitors
- see separate presentation from S. Smith
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Asynchronous Beam Acquisition via SCP
e.g. Gun charge vs. laser power
Measured on the SCP
Correlation Plot
April 16-17, 2007
LCLS FAC
But some people still
plotting data offline
Patrick Krejcik
pkr@slac.stanford.edu
Beam Synchronous Acquisition is working
through Matlab – example of orbit display
- BSAP via the SCP coming next
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Motion control
-BC1 chicane movers in use
- next to be commissioned: wire scanners, collimators
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Generic Tools that are working
SCP
Configuration save and restore
EPICS Channel Watcher
Correlation plots
Strip chart tools
Archive Viewer
Alarm handler
Electronic logbook
Matlab for higher level applications
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Strip Tool monitoring gun temperatures during RF trips
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Electronic logbook gives instant overview
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Control Room Conditions Still a Bit Cramped
(first beam to end of BC1!)
Reorganizing the
control room layout
Purchasing more
workstations
Injector commissioning
involved 12 or more in
the room, so its likely
to increase as the linac
and undulator systems
are commissioned
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu
Summary and lessons learned
Remarkable commissioning achievement for the control
system
Controls commissioning time was squeezed
How do we ask for more?
Planned BC2–linac installation is tight
Improve liaison with mechanical engineering
We are still learning how to handle large number of IOCs
and the huge number of PVs
e.g. Restoring after a reboot
Large number of EDM displays can confuse operators at
times (looking for a screen that may be already open)
Controls group is a great TEAM!
April 16-17, 2007
LCLS FAC
Patrick Krejcik
pkr@slac.stanford.edu