preparations for linac commissioning

1 BROOKHAVEN SCIENCE ASSOCIATES

Preparations for Linac Commissioning

Ray Fliller, Associate Physicist8th ASAC meeting for NSLS-II Project

May 10-11, 2011


Introduction

• Linac Commissioning is scheduled to start November 7, 2011. It is anticipated to last until the end of the year.

• Obtaining authorization is required prior to commissioning. The authorization process involves the NSLS-II project, the lab ESH committee, lab management and the DOE.

• The focus of this talk is path to authorization.


Linac Commissioning Task Force• On December 15, Ferdinand appointed the Linac Commissioning Task Force who’s task is to coordinate

commissioning of the NSLS-II linac• Members:

• Ray Fliller – Injection Systems, Task Force Lead• Brett Parker – Injection Systems• Joe Delong – Controls• Feng Gao – RF• Om Singh – Diagnostics• Bob Casey – ESH• Andrew Ackerman – ESH• Mike Buckley – ESH• Randy Church – Operations• Mike Santana – Operations• Timur Shaftan – Injection Systems Group Leader• Jim Rose – RF Systems Group Leader• Ferdinand Willeke – Accelerator Systems Division Head

• Meetings are held bi-weekly and as needed.• Current focus has been the Authorization Basis documentation required for linac commissioning in

culminating in the Accelerator Readiness Review.


Zoom in to linac vault

Equipment installation proceeds through the penetration and ends at a gate valve.

This section will not see beam during commissioning End of Linac

ICT

LB-B2

LB-B1


Operation Authorization Process

We are here,Send to DDO this week

Courtesy of Steve Hoey.

May 28, 2011

May 31, 2011

October 17, 2011

November 7, 2011

April 12, 2011~2009


Linac Commissioning Schedule

• Lab ESH committee reviews the Authorization Basis (AB) Documentation – April 12, 2011 – finished.

• Deputy Director of Operation approval of AB documentation – package to DDO this week

• BHSO receive AB Documentation for Review – May 28, 2011• ARR Team Appointment – May 31, 2011• BHSO Approval of AB documentation – July 8, 2011• Injector Building Beneficial Occupancy Date - July 28, 2011• Linac Installation Begins - August 11, 2011• Linac ARR - October 17, 2011• Linac Commissioning Begins – November 7, 2011


Immediate Next Steps• Develop the Linac Commissioning Plan and other necessary

documentation• Linac Commissioning Plan outlines what needs to occur to be ready for commissioning.

• Get necessary AB documentation approvals from DDO and BHSO.• Interface with Research Instruments to develop a linac commissioning

sequence• A draft sequence exists.• I will travel to RI in late June with this as one of my tasks.

• Finish High Level application requirements and specifications• Prepare to the ARR


Linac Beam Parameters


Diagnostics Available for Commissioning

Flag

Flag

Flag

FlagFlagFlag

ICTBPMBPM

Faraday Cup

Faraday Cup

FCT

Installed but sees no beam

Safety Shutter


Linac Parameters and Measurements necessary for commissioning

Beam Parameter Value Measurement

Energy 200 MeV Dipole & Flag

Current 0.5nC/bunch in SPM and 15 nC train in LPM

Wall Current Monitors in Linac, Integrating Current Transformer at Linac output, Faraday cup in both beam

dumps.Fill Pattern 1 bunch in SPM, 80-150 bunches

separated by 2 ns, 10% relative charge difference per bunch in LPM

Wall Current Monitors in Linac, Fast Current Transformer at Linac output, Faraday cup in Dump on straight ahead

transport lineEnergy Spread 0.5% Dipole and 2 flags

Transverse Emittance 4sxsx’=155nm Three Screens and Quadrupole scan in transport line


List of High Level Applications(not exhaustive)

•operators panel•vacuum status•PS status•Temperature measurement

•beam loading compensation

•Water/ Compressed air status•synchronization panel/ bunch select•bunch pattern monitor•RF feedbacks•charge/ trajectory/ beam size measurements

•energy/ energy spread measurement•emittance measurement (3 screen + quad scan)

•charge/ bunch pattern measurements

•interlock status + shutters status

•rad monitors status•loss measurement system•Linac current monitor panel

Want to have specifications for all high level applications by the end of May


Conclusion• Linac Commissioning Task Force has been assembled to coordinate

commissioning tasks.• Task force’s main focus to date has been on developing the AB

documents with ESH. • This is on schedule

• The path to commissioning is clear both from ESH and physics point of view.


SPARES

preparations for linac commissioning

Documents

linac arr

linac installation

linac output

linac commissioningray

ray fliller injection

current focus

measurements necessary

current transformer