Magnet Controls K. Luchini Requirements Technical Interface Interface Control System Architecture Hardware Software Schedule Budget 1

Requirements Magnet Power Supplies Stability Correctors: 0.1% of maximum current (e.g. 10e-3, 1000ppm) Bends: 0.05-0.1% of maximum current. System must operate over 30degC temp range in Linac gallery Existing Magnets Many SLC magnets will be turned off during LCLS operations Quad splits in LI21 & 24 - reconfigure quad strings for two modes LCLS & SLC Magnet Correctors with Feedback Max rate up to 120Hz. Most ff correctors will have a rate of 10Hz Must use the EPICS Fast Feedback system Limit Family of PS for ease of maintenance and to reduced cost Magnet Interlocks including Ground fault protection will be provided Redundant current read back for large and intermediate power supplies Switching between LCLS mode and SLC must not exceed 15 minutes

Technical Interface Physicist - P. Emma, P. Krejcik, R. Carr, M. Woodley, Operations – M. Stanek, A. Alarcon,S. Schuh Power Electronics Department – P. Bellomo, A. de Lira, D. MacNair Engineering B. Fuller, C. Rago, E. Bong, P. Bong, J. Dusatko, M. Cecere, M. Ortega Magnet Measurements – Z. Wolf, S. Anderson Conventional Facilities – L. Shewchuk, J. Sevilla, B. Law Software S. Peng, S. Allison,D. Rodgin, S. Norum, J. Stein,K. Underwood, N. Spencer Modeling – M. Woodley Networking – Murry, Lahey Management – D. Schultz, B. Dalesio

System Interface Control Fast feedback – S. Allison Max rate of 120Hz 5 milliseconds to set magnet B-field 1 millisecond to return DAC read back status Use dedicated network Timing System for synchronization (ioc’s with fast feedback only) Machine Protection System – S. Norum Report Power Supply status to MPS All bends and some quads PPS – P. Bong (none) All magnets electrical connections covered to comply with SLAC, National Electric Code and OSHA regulations. Alleviates need for access interlocks.

System Architecture Magnet Magnet Magnet Magnet Linux VMS Ethernet Alpha CA Server OPI SCP Standalones Ethernet SLC net EPICS IOC VME Crate SLAC Ethernet PS Controller Magnet SLC Micro Magnet CAMAC MCOR Large PS Controller SCOR PS PS Bulk PS Bulk PS Magnet Magnet

Hardware - Small PS Max. 30A Used for Correctors, low current quads and trims BiRa Systems – MCOR12/30 Off the shelf product Used in PEP2 and SPEAR3 15ppm/degC – meets requirements in PRD ps regulation Uses Bulk PS supplies - reducing cost (all rack mountable ps) Crate capacity 12A Power Modules – max 16 per crate 30A Power Modules – max 8 per crate 2 Current read backs - use shunt register for redundant Fault Status & Reset PS Redundancy under investigation by PED

Bulk PS System Architecture for Magnets under 30A OPI OPI EPICS IOC VME Crate Magnet 16 Magnets@ 12Amps max MCOR 12 Ground Fault System Magnet Bulk PS

Hardware – Intermediate/Large PS Used for Bends, solenoids and some quads SLAC Ethernet PS Controller earlier BitBus version used at SPEAR3 2ppm/1 deg C – meets requirements in PRD two current read backs – transductor variable ramp rates ps regulation & monitors ps health EPICS driver exists Power Supply Families 60V, 165A, 10kW 25V,375A,10kW 33V,300A,10kW

SLAC Ethernet Controller

Intermediate PS System Architecture OPI Ethernet EPICS IOC Network Switch SLAC Ethernet PS Controller Terminal Server Interlocks Transductors Intermediate PS Magnet

Software Magnet Functions same functionality as existing control system Trim, Perturb, Cal, Stdz, Degauss, PS On/Off/Reset Knobs Phase I SLC Aware IOC (Debbie Rogind) – Done 80% SLC Db – Done for inj & bc1 EPICS drivers - Feb 2006 EPICS Db - Mar 2006 EPICS Seq - Apr 2006 Displays SLC SCP Panels - Done EPICS – Mar 2006

Injector/BC1 Schedule Order hardware – Done Rack Profile by PED – Done Cable and Wiring Diagrams Cable and Wiring Diagrams by PED – Done Inter-rack Wiring Diagrams – Done (early Feb,2006) Installation and Commissioning Schedule LCLS Controls Magnets

Slide courtesy of Dave Schultz (Jan 24, 2006) Linac/Undulator BCRs FY06 FY07 FY08 FY09 total LN-24 For today +$23k +$394k +$441k UN-xx Needs to be vetted -$26k -$154k -$3k -$183k potential net +$258k Slide courtesy of Dave Schultz (Jan 24, 2006)

THE END!

Slide courtesy of Dave Schultz (Jan 24, 2006) Linac Power Supplies Increase in magnet power supply count due to magnets: 1) listed in the original MAD Deck and missed in the original WBS, 2) known but not listed in the original MAD Deck and therefore not listed in the original WBS, 3) that were added and 4) power supplies that were replaced in order to reach stability requirements for LCLS. This BCR is for the full Linac, per our best current estimate, representing a significant analysis Bob Fuller, Kristi Luchini, Carl Rago, Paul Bellomo, Paul Emma, Eric Bong Slide courtesy of Dave Schultz (Jan 24, 2006)

Slide courtesy of Dave Schultz (Jan 24, 2006) Linac Power Supplies Need to draw these funds up from Contingency. No milestone impact Accurate installation schedule (improvement) Potential savings in the Undulator power supply system Need to check rack space, cabling, inst, … prior to issuing that BCR Slide courtesy of Dave Schultz (Jan 24, 2006)