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

2. Requirements Magnet Power Supplies Stability
Correctors: 0.1% of maximum current (e.g. 10e-3, 1000ppm)
Bends: % 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

3. 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

4. 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.

5. 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

6. 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

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

9. 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

10. SLAC Ethernet Controller

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

12. 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

13. 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

14. 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)

15. THE END!

16. 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)

17. 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)