Transcript Beam-Based Feedback Systems

MATLAB Feedback
Phase II Commissioning
Oct. 30, 2007
LCLS FAC
D. Fairley
Topics
First Commissioning Results
Feedbacks for Phase II
New Block Diagram
New Requirements
Plan and Schedule
Oct. 30, 2007
LCLS FAC
D. Fairley
First Commissioning
Longitudinal Feedback working successfully. Currently
implemented as 3 different feedbacks
DL1 Energy (or to Spect. Dump)
DL2 and BC2 Energies
DL1, BC2 Energies + BC2 Bunch length
Injector Launch Feedback working successfully
Feedback framework allowed significant configurability
during commissioning.
Developed a good working relationship with physicists
(J. Frisch, J. Wu) and good understanding of feedback
systems for LCLS
Oct. 30, 2007
LCLS FAC
D. Fairley
Screen Shots
Oct. 30, 2007
LCLS FAC
D. Fairley
Feedbacks for Phase II
Bunch Charge
Longitudinal will expand to include BC2
energy, BC2 Bunch Length and DL2
Energy
L2 Launch
L3 Launch
Oct. 30, 2007
LCLS FAC
D. Fairley
LCLS – Accelerator and Bunch Compressor Schematic
Oct. 30, 2007
LCLS FAC
D. Fairley
New Block Diagram
Oct. 30, 2007
LCLS FAC
D. Fairley
Feedbacks for Phase II
Decision: Feedbacks implemented in framework will be
‘EPICS only.’
Additional Feedbacks in MATLAB
Bunch Charge
Longitudinal will expand to include BC2 Energy and BC2
Bunch Length
We have 3 EPICS BPMs for longitudinal; allows 5x5 fully
EPICS
Feedbacks in SLC
DL2 Energy
L2 and L3 Launch
Oct. 30, 2007
LCLS FAC
D. Fairley
New Requirements
Create a more production oriented feedback system
Separate ‘Configuration’ from runtime feedbacks.
Make feedback controllable from any kiosk
Display more status and enhance alarms
Automatically switch configurations
Make feedbacks detect beam line conditions and switch configuration
accordingly
For example, TD11 stopper status, magnet power supply settings, etc
Add weighting factors to transverse feedback algorithm
Add a mask matrix to longitudinal feedback algorithm
Runtime adjustment of gains, weighting factors, mask matrix
Place these in soft IOC so they can be changed while feedback is running.
Oct. 30, 2007
LCLS FAC
D. Fairley
Plan and Schedule
Make Feedback more ‘production’ oriented
Separate Configuration, make controllable from any kiosk - done
Status in EDM, alarms – October, in progress
Bunch charge feedback
October, In progress – must be ready to commission in December
Algorithm enhancements (gains, weighting, mask matrix)
Longitudinal – November
Transverse – November-December
Automatic configuration switching
December
Experimental testing with mask matrix, weighting
Jan – May, when we can get machine time
Experimental testing with changing beam line conditions
Jan – May, when we can get machine time
Oct. 30, 2007
LCLS FAC
D. Fairley