1. LCLS Personnel Protection System and Beam Containment System
E. Michael Saleski
PPS and BCS Systems Manager

2. PPS and BCS Overview
Path for design development, review, and approval
System Scope
Present Status of Systems and Reviews

3. Safety Systems Development and Review Process
LCLS Engineering Specification Document (ESD) is developed in consultation with System Engineers, RP, and LCLS Management
System Engineers design system
LCLS Project Reviews (SCR, PDR, FDR) are conducted
RSO/Radiation Safety Committee approval is also required
System is built by System Engineers and Techs

4. Safety Systems Development and Review Process

5. Plan to utilize PLC architecture
PPS Scope
Mixture of:
New PPS Systems
Existing PPS Systems with minor modifications
Hutch Protection Systems (HPS)
Plan to utilize PLC architecture
New at SLAC, increases review burden

6. PPS Scope

7. Near Experimental Hall Draft Layout

8. Simplified PPS System Architecture

9. PPS Reviews Status PPS Global SCR: Nov 18, 2005
Injector (linac+BSY) Informal PDR: Feb ’06
Injector (linac+BSY) FDR: April 27th
RSC subcommittee: Functional Requirements Review: March 29th
RSC subcommittee: Safety Lifecycle Review: April 14th
RSC subcommittee: Technical Review: May 8th
RSC full committee: Aug 23rd; Sept 7th

10. LCLS Injector PPS Reviews are Complete
PPS Status for Jan 2007 Injector Commissioning and Downstream Development
LCLS Injector PPS Reviews are Complete
RSC ‘conditional approval’ obtained:
Produce written response to FDR and RSC subcommittee comments and findings (done)
RSC would like to review Certification procedure (scheduled for end of October)
Hardware drawings, wiring diagrams are complete; installation in progress
Begin detailed design and review of downstream systems in Fall 2006 (BTH, NEH)

11. BCS Definition and Project Scope
Prevents radiation from ‘escaping’ the shielding enclosure
Direct measurements of radiation or beam loss
Protection of safety-critical collimators and stoppers
Entirely ‘new’ LCLS BCS needed
New gun = new shut-off mechanisms
Support two simultaneous programs (LCLS & PEP) = new set of shut-off paths
Reduce mutual interference of programs as much as possible = desire targeted shut-offs if plausible

12. BCS System Scope
Original ‘Mode-switching’ BCS proposal has been sidelined for now
Propose an ‘Interim BCS’ where conservatively “All BCS faults shut-off all Guns.”
Mode-switching requirements are now better understood – move forward with second proposal for 2007 downtime implementation

13. Sidelined BCS Modes

14. Interim BCS System Architecture

15. BCS Device Scope 2 LION pairs in Injector Region, plus 2 flow switches
Redundant LIONs will be run the entire length of the Beam Transport Hall (above ground beamline)
Numerous BTM shield walls, plus IC pairs, in BTH
At least two BCS power-limited devices in BTH = 4 ICs
Electron Dump BCS Implementation…
X-Ray system BCS should be 100% passive (no active components)

16. Proposed Electron Dump BCS

17. Interim design PDR and FDR are complete (Sept 8th and Oct 6th)
BCS Status for Jan 2007 Injector Commissioning and Downstream Development
Interim design PDR and FDR are complete (Sept 8th and Oct 6th)
Follow-up review of ‘SBI’ implementation needed
New LCLS BCS device compliment for Injector-through-TD11 operation is approved by the RSC (Sept 28th)
RSC Review of Interim BCS system design is scheduled for Oct 17th
New BCS device compliment for downstream systems is currently being specified – much is dependent on LCLS ‘ray traces’

18. Summary PPS: BCS: Injector Vault will be ready for Jan 2007 operation
Downstream system development looks to proceed on schedule
BCS:
Interim BCS design looks to be on track for Jan 2007 operation
New Mode-switching proposal ready for RSO examination in early 2007
Detailed analysis of downstream system BCS device requirements is beginning