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Current Work - Glen WhiteLC Beam Dynamics
BDS tuning and feedbacks design and simulation
ATF2
SLAC h/w controls support
Tuning simulation & application development
Tuesday, August 24, 2010
ILC/CLIC WorkResponsible for design and simulation of ILC BDS beam tuning system.
Working system developed and simulated for ILC RDR. Since, there have been design changes which make BDS tuning more difficult- need to show can still make it work (SB2009b)
Maintain Lucretia beam tracking and modeling code (Matlab + C).
Currently exploring s/w and h/w upgrades to speed up simulations through parallelisation of code.
Test very similar tuning procedure at ATF2, see what works, where to improve
Understand limitations as reduce IP beta function / increase chromaticity of final focus system towards CLIC regime.
Tuesday, August 24, 2010
ATF2 WorkTuning system design and simulation.
Co-ordination of international technical resources for beam tuning.
ATF2 technical board member.
Budget holder and co-ordination responsibility for SLAC ATF2 effort.
EPICS infrastructure and control systems for SLAC-supplied h/w.
ATF2 “flight simulator” & various tuning tools
Tuesday, August 24, 2010
Tuesday, August 24, 2010
ATF2 International CollaborationSLAC:•J. Nelson•D. McCormick•T. Smith•S. Smith•J. Frisch•M. Woodley•M. Wang•G. White
Tuesday, August 24, 2010
ATF2
Tuesday, August 24, 2010
SLAC-Supported ATF2 Hardware SystemsHigh-availability PS for EXT & FFS Quad, Bend and Sext magnets.
Currently investigating upgrade of 6 matching quads to bi-polar supplies.
Magnet mover system for FFS Quads and Sexts.
Ongoing work to improve orthogonality and speed
C-band cavity BPM system electronics.
Resolutions tested down to 20nm
Test IPBPM electronics.
Aiming for 1nm resolution!
EXT stripline BPM readout system.
Uses LCLS developed analog boards.
Multi - OTR system
4 systems checked out in June, new targets for fall (2um Aluminium)
POST-IP 5-um Carbon wire scanner.
Work underway to fit IP assembly with Carbon wires
Tuesday, August 24, 2010
High-‐Level Controls for Commissioning and Tuning
• Main system used = VSYSTEM + SAD online model–Mainstay for accelerator operaCons, tested, maintained and stable.
• Alternate system developed based on EPICS+ Matlab + LucreCa beam dynamics code: ATF2 “flight-‐simulator”–Portable for offsite code development and tesCng–Same soPware runs either in producCon or simulaCon mode using simulaCon mode of low-‐level EPICS controls.–Can interface to other code through tcp/ip socket layer or EPICS DB interface.
Tuesday, August 24, 2010
Example Flight Simulator Tuning Tools
Dispersion CorrecCon
Beam scans
Orbit Feedback
BBA
Tuesday, August 24, 2010
IP Tuning with FFS Sextupole MulCknobs
• IteraCve use of various knobs to bring down IP spot size by scanning with IPBSM.
Tuesday, August 24, 2010
IP Tuning Results During ConCnuous OperaCons Week
• Tuning from iniCal setup of 850nm down to 300nm during 2 consecuCve shiPs last Thursday.
• Beam size cross-‐checked on IPBSM 8-‐degree & 30-‐degree mode.• Trouble reducing beam size past 300nm in 30-‐degree mode as do not have the resoluCon to scan higher beam sizes.
α η k θ α η <x’y> α η k<x’y>
startupLaser tuning
Tuesday, August 24, 2010
