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John Seeman
LCLS ARR [email protected]
December 2, 20081
Conduct ofLCLS Accelerator Operations
John Seeman
Assistant Director LCLS Directorate
Head of the Accelerator Systems Division
LCLS Directorate
John Seeman
LCLS ARR [email protected]
December 2, 20082
Accelerator System Division
Maintenance management
Down time planning
Overall schedule
Scheduling beam time
Delivered beam specification
Topics
John Seeman
LCLS ARR [email protected]
December 2, 20083
Accelerator Systems Division (ASD)
ASD has operated accelerators at SLAC for well over 30 years. The accelerators are:
Linac (50 GeV)PEP-ISPEAR-I and IISLCPEP-IIFFTBLCLS Injection and Linac
Programs, training, and documentation in place to carry out the programs carefully, safely, and with full technical rigor.The staff is trained to carry out these programs, holding all accelerators to the same standards.Formal procedures are in place to deal properly with DOE safety standards, Operations Directives, and the Citizen Committees.
John Seeman
LCLS ARR [email protected]
December 2, 20084
ASD Documentation
Guiding documents:SLAC Guidelines of Operations (Under constant updating)ASD Operations DirectivesLCLS/LINAC SADLCLS/LINAC ASEAccelerator Safety Assessment DocumentsES&H documentationUn-reviewed Safety Items (USI) handled by Guidelines of Operations and LCLS SADASD Operational documents
John Seeman
LCLS ARR [email protected]
December 2, 20085
USIs
LCLS SAD:Safety issues that are not covered in the above documentation, and for which a safety analysis has not been performed, could arise. Such an issue would constitute an Unreviewed Safety Issue under DOE Order 420.2B Section 4c. Activities that involve unreviewed safety issues must not be performed if significant safety consequences could result from either an accident or a malfunction of equipment that is important to safety. Such activitites would be formally reviewed and be subject to the approval of the appropriate safety officers and citizen safety committees, as required by SLAC Guidelines for Operations. Activities involving identified unreviewed safety issues must not commence before DOE has provided written approval.
A Working Group has been formed as follow up to the DOE ISMS Effectiveness Review in August 2008 with the aim of improving USI definition at SLAC with inputs from other laboratories programs with the target of Spring 2009.
John Seeman
LCLS ARR [email protected]
December 2, 20086
Authorization of operating the Linac Related Accelerators at SLAC follow the organization of the SLAC laboratory:
SLAC DOE Site Office
Laboratory Director
Deputy Directors for LCLS
Head of the Accelerator Systems Division
Head of the Operation Group
Engineering Operator In Charge (EOIC) in the Control Room
Operations Authorization
John Seeman
LCLS ARR [email protected]
December 2, 20087
ASD Staff
Admin: 4Safety office: 1Physicists: 9Mechanical engineers: 3Operations and reliability: 2Operators: 23Area managers: 7Technicians: 3Total = 52
John Seeman
LCLS ARR [email protected]
December 2, 20088
LCLS beam:
4 to 14 GeV e- beam to 120 Hz to 1 x 1010
Linac capabilities (if needed):
e- to 49 GeV at 120 Hz at 2 x 1010
e+ to 49 GeV at 120 Hz at 2 x 1010
Linac Operating Modes in FY2009
John Seeman
LCLS ARR [email protected]
December 2, 200810
Program Deputy• Duty rotates among Accelerator Division physicists.• Oversees program for 3 or 4 day period.• Not always present in the control room.
Operations Engineer• 1 EOIC per shift (from a group of 7), on rotating 7-week cycle. • Responsible for safely carrying out the scheduled program.• Exempt position; directs the Accelerator Systems Operators.• Must be present if accelerator is capable of producing beam.• All have experience as accelerator systems operators.
Accelerator Systems OperatorsTypically 3 operators per shift on rotating 5-week cycle:
Control Room Staffing
John Seeman
LCLS ARR [email protected]
December 2, 200811
Operators are trained to carry out certain well-defined tasks, following formally controlled procedures.
Examples:
• Interlock Checklists
• Search Procedures
• Entry and Exit Procedures
• Safety Inspection Checklists
Safety procedures:
• undergo a formal review and approval process.
• are updated as conditions change.
• are available on the AD Documentation web site, although the signed originals are preserved in paper form
Completed checklists and log books are archived.
Operator Safety Procedures
John Seeman
LCLS ARR [email protected]
December 2, 200812
8:00 Meeting every day, seven days a week, in MCC conference room.• Operations report by EOIC, including run time statistics, progress in
carrying out scheduled program, descriptions of problems, etc.• Reports by representatives of major experimental user groups.• Attended by PPA, Accel Div, and Operations management reps, Program
Deputy, System Physicists, Area Managers, and representatives of user groups and major technical support departments; typical attendance: 45 persons.
8:15 Maintenance Meeting, five days each week.• Run by Accelerator Operations Department maintenance managers.• Attended by supervisors of all maintenance groups, Area Managers, and
interested physicists and engineers.• Attendance: typically 45 persons.
Accelerator Plans Meeting, weekly.• Review of operational progress, problems, and plans.• Attended by Accel Systems Div and Dept Heads, Program Coordinators,
Accelerator Section Heads and ADSO.
Planning with Accelerator Users and Maintenance Staff
John Seeman
LCLS ARR [email protected]
December 2, 200813
Planned Maintenance Days• Whenever possible, identified maintenance, repair, and installation jobs
are pre-planned. • Coordination• Daily 8:15am meeting.• Coordinated by Operations Maintenance Office.• Area Managers are advocates for their areas.
Standby Maintenance List (SML)• Jobs that are planned and can be launched on short notice.• Provides options for EOIC to take advantage of unscheduled
interruptions.• ARTEMIS/CATER Electronic Database records items.
Accelerator Maintenance
John Seeman
LCLS ARR [email protected]
December 2, 200814
ARTEMIS (Accelerator Remedy Trouble Entry and Maintenance Information System) is an Oracle database with a Remedy interface, accessible over the internet by everyone involved with SLAC accelerator maintenance.
Operators report problems as they occur by making entries in ARTEMIS.
Repair work is launched immediately if the problem is inhibiting the scheduled accelerator program.
Jobs are tracked using ARTEMIS until they are finally closed.
ARTEMIS entries since Jan 1989: ~84000.
ARTEMIS entries in one year (2006):
• 3166 new problems (8.7 per day).
• 3296 problems closed (9.0 per day).
ARTEMIS/CATER
John Seeman
LCLS ARR [email protected]
December 2, 200815
Long Down Times usually occur once each year and typically last two to three months.
Area Managers collect job requests from system physicists, project engineers, maintenance groups, and the ARTEMIS database.
A comprehensive schedule is prepared, updated, and reviewed at weekly meetings, starting about four months before the down time.
This schedule lists each job with an assigned shop, and lists the Project or Group Manager, Responsible Task Person, and Area Manager.
Schedule specifies time and duration of each job (with 1 day time resolution), and number of persons required.
Schedule specifies authorizations required (WAF, RSWCF, EWP, etc.).
Detailed (shift by shift) schedule of pre-run testing, safety certifications, and turn-on activities is prepared by the Operations Dept and revised as needed on a real-time basis.
Long Down Time Planning
John Seeman
LCLS ARR [email protected]
December 2, 200818
Goal for what typical LCLS operations will look like in two years.
John Seeman
LCLS ARR [email protected]
December 2, 200819
Re-establishRe-establishee to SL2 to SL2
LTU/LTU/UndUnd
Comm. Comm.
Firs
t Li
ght
in
Firs
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NEH Ops & NEH Ops & CommissioningCommissioning
JJJJ FFFF MMMM AAAA MMMM JJJJ JJJJ AAAA SSSS DDDD JJJJ FFFF MMMM AAAA MMMM JJJJ JJJJ AAAA SSSS OOOO NNNN DDDD JJJJ FFFF MMMM AAAA MMMM JJJJ JJJJOONNAA
2008 2009 20102008 2009 2010 2008 2009 20102008 2009 2010DownDownPPS
PPS
Linac/BC2 Linac/BC2 CommissioninCommissionin
g g FEL/FEEFEL/FEECommissioniCommissioni
ng ng Nov. 3, 2008Nov. 3, 2008
Inst
all
Inst
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ndula
tors
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MMDD
LCLSLCLS Installation and Commissioning Time-Line Installation and Commissioning Time-Line
LTU
/Und
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/Und
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ends
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O
John Seeman
LCLS ARR [email protected]
December 2, 200821
X-ray User Performance Drivers for ASD
Reliable operation with high uptime (>95%).
Steady beam parameters when operating.
Rapid but reasonable change of beam parameters when needed by the user.
Maintain alternate user programs when expected user program changes.
John Seeman
LCLS ARR [email protected]
December 2, 200822
Proposed Initial Beam Parametersfor Users
Early ops MatureElectron energy 4.3 GeV 4.3 GeV
Repetition rate 30 Hz 120 Hz
Bunch length 200 fs FWHM 200 fs FWHM
FEL peak power 500 MW 5 GW
FEL bandwidth 0.25% 0.2%
Energy per pulse 0.1 mJ 2 mJ
Photons/0.1%BW 3 1011 1 1013
Peak brightness 3 1030 3 1031
Average brightness 2 1019 2 1021
J. Galayda
John Seeman
LCLS ARR [email protected]
December 2, 200823
Linac operations are managed by the Accelerator Systems Division under the LCLS Directorate.Documented policies and procedures exit for all safety-related activities.Maintenance and installation work is accomplished through a matrix organization, drawing on engineers, technicians, and ES&H and shop services from the ETS Directorate.We have developed organizational structures, software tools, and documentation that enable us to manage an ambitious accelerator-based science program safely and effectively.A beam-time scheduling mechanism is being developed to resolve operational beam parameter specifications and changes.We are ready to operate the LCLS LTU, Undulator, and e- Beam Dump.
Conclusions
