The LCLS Undulator System Overview

1
The LCLS Undulator System Overview

• Stephen Milton
• LCLS FAC Review
• April 28 - 29, 2004

2
Brief LCLS Overview
3
Present Relationship within LCLS
LCLS Project Engineering and Design Organization
2004
4
Undulator Hall Layout
5
Laboratory Relationship and L3 Organization
APS J.M. Gibson Assoc. Lab. Director
LCLS Undulator S. Milton Project Director
LCLS Project J. Galayda Project Director
D. Walters Vacuum/Diagnostics CAM
Accel. Systems. Div. R. Gerig Division Director
M. White Magnet Systems CAM
Exp. Facilities Div. E. Gluskin Division Director
APS Operations Div. W. Ruzicka Division Director
J. Stein Controls CAM
6
LCLS Undulator System PED Org. (Present)
S. Milton LCLS Undulator Sys. F. Coose, Project
Analyst F. Clark, PMCS
ANL Indirect Support
SLAC/AIM
J. Chan PMCS Manager
As needed
D. Walters Vacuum/Diagnostics CAM
J. Stein Controls CAM
M. White Magnet Systems CAM
Contract
J. Bailey, ME (NE) S.H. Lee, ME B.X. Yang, Phy
I. Vasserman, Phy R. Dejus, Phy E. Traktenberg,
ME G. Lawrence, ME E. Moog, Phy
B. Delesio

• This is not a complete list as we have drawn
  heavily from others within ANL and SLAC, but at a
  lower fraction than those listed

SLAC
R. Ruland Mag. Meas. Fac. J. Welch Fixed
Support Interfaces
7
Full Length Prototype Undulator Module
8
3-D ProE Model of Prototype Module
9
Undulator

• How to set K
• Shimming
• 1 micron shims are not practical
• End Phase control
• Use unproven expensive piezo drives
• Might be useful to compensate temperature changes
• Back pole comb shunts
• Complex mechanics
• Canted poles
• Simple to implement
• Some issues with coupling to trajectory

10
Recent Highlights K Setpoint--Canted Poles

• Average K Value Set by the horizontal location
• Has the additional possibility of adding a small
  amount of tapering in the future
• See Isaacs talk for measurement results

11
Undulator Assembly Schematic
12
Short Break Assembly
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Long Break Schematic
14
Entrance Section Schematic
15
Exit Section Schematic
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Support Interface
17
Interface to Conventional Facilities

• ANL provides to SLAC CF (David Saenz) input per
  request

18
Magnet Measurement Facility

• MMF is a SLAC Responsibility with ANL in
  Consulting Role
• ANL Delivers Magnets to SLAC MMF
• SLAC Personnel Measure and Tune Magnets
• ANL/SLAC signoff on magnet and magnet becomes
  SLACs responsibility

19
Roll Away Undulators

• Horizontal Version Conceptual Diagram

20
Issues Undulator

• Stability over time
• Temperature is very critical
• Tight temperature specifications are being placed
  on the undulator hall
• What moves and what does not move
• BBA requires accurate control over the quad
  position.
• The quad position must be held accurately
  relative to the undulator. This is particularly
  true in the vertical direction.
• Moving the undulator/quad assembly to micron
  levels is very challenging
• Tight Schedule
• Trying to come up clean procurement strategies

21
Vacuum System

• Vacuum Chamber
• Many Designs and Design Options Explored
• Surface roughness
• Definition
• Achieving
• Electro polishing of Cu explored
• New idea of using flow polishing being pursued
• Prototyping
• To begin soon

22
Diagnostics

• No Intraundulator x-ray diagnostics
• Now an RD task
• End-of-undulator x-ray diagnostics
• In the process of optimization
• The need for roll away undulators
• Other Diagnostics
• In the design process
• RFBPM
• Prototype is critical, but early tests in Japan
  have already been performed

23
Controls

• Various interfaces to SLAC
• EPICS -gt SLAC interface
• Timing interface
• See J. Steins and B. Delesios talks

24
Schedule and Cost Creation

• Level of Effort
• The LCLS undulator team has devoted most of its
  effort over the last 6 months towards the
  generation of an integrated cost and schedule
• Methodology
• Start from CD1 estimates
• Refine and create logic in MSProject
• Transfer to P3 (Primavera Project Planner)
• Use P3 experts to get under control F. Clark
  (ANL), J. Chan (AIM/SLAC) S. Thompson (CH2M Hill
  Consultant)
• Twice weekly scrubbing with SLAC via Netmeeting

25
Effort and Cost Profile

• Additional Scrubbing will be done prior to the
  EIR to further refine our numbers.
• PED, Construction, and OPC Included

26
Schedule and Cost Issues

• Expected very rapid buildup in force
• Murray Gibson (ANL Associate Laboratory Director
  APS) has already been made aware of this and is
  ready to work with us to ensure adequate
  resources are made available
• Continues to stress that LCLS is a Top Priority
  of the APS
• Have already enlisted additional engineering
  support for this year
• Will be working on procurement packages as well
  as technical issues so that when the money
  arrives we are ready to go
• Tight Scheduling due to FY boundary issues
• Work continues on developing solid procurement
  strategies

27
Major Events/Milestones

• Long Lead Procurements
• Must be out the door Oct/Nov 2004
• Construction of Undulators
• Would like 1st article delivery in FY05 to ease
  the schedule
• Must have assembly started beginning of FY06
  (when construction funds arrive)
• Magnet Measurement Facility
• Need to get a magnet to them soon (by end of
  calendar year) to begin initial controls
  integration
• 33rd Magnet Arrives
• March 07
• July 07
• Expect undulator system installation complete

28
Past DOE Reviews CD1 and CD2a

• Manufacturing Concerns, Materials, Tolerances,
  etc.
• 1st prototype report provides summary
• http//www.aps.anl.gov/xfd/tech_bulletins/List_of_
  TBs.html
• ANL/APS/TB-48
• Procurement strategies and QA
• ANL Management Backing
• BPM tests
• Funding not sufficient to meet Sept 04 deadline
• Dedicated experienced team for procurement
• Established
• QA plan not yet in place (Required for CD-2b
  acceptance)
• Costing issues
• Changes in costs between CD1 and CD2a are
  understood
• ANL will make the major procurements

29
Past DOE Reviews CD1 and CD2a

• Schedule
• Understood, but will be tight along the undulator
  path
• Staff vs. Funding
• Allocated 1.18M for FY04
• Trimmed number of FTE to 8 by moving some PED
  work into FY05
• FY05 rapid increase in staffing has support of
  ANL management
• Organization
• Matrixing between SLAC and ANL has been
  implemented, but not completely formalized
• Procurement options for LLP and Undulator
  Assemblies
• Still being studied in depth for optimization and
  fit to BA
• Will organize a separate review of this activity
  before release

30
Past Reviews Undulator Magnet (Nov 03)

• Phase Adjusters
• Additional studies have been performed however,
• at present we have decided not to implement them
• Comb Shunt
• Only minor additional work was done on this.
• We have decided not to implement it. (too
  complex).
• Canted Jaws
• We have tested and decided to use this idea.
• Thank You Undulator Committee and Especially J.
  Pflueger
• Sm2CO17 Advantage?
• Not as much of an advantage as previously thought
• Too many open issues. Not enough time and money
• APS to pursue this on their own

31
Past Reviews Undulator Magnet (Nov 03)

• Thermal Control
• Stringent requirements built into tunnel for
  support stability
• 2nd Prototype
• Will not be built
• Focus is now on 1st article acquisition
• Production/Procurement Plans
• We are starting to work through these details.
• A formalized risk assessment of the varios
  options has not yet been performed.

32
Past Workshops (Project Agreement Meetings)

• Parameters Meeting (October 03)
• Purpose was to fix both K and lambdaU
• Results
• K decreased slightly to accommodate slightly
  lower electron beam energy (14.1 GeV vs. 14.35
  GeV)
• Diagnostics/Commissioning Meeting (Jan 04)
• Purpose was to establish a commissioning plan
  based on an achievable set of diagnostics
• Results
• There will not be any intraundulator x-ray
  diagnostics.
• We will rely on end-of-undulator diagnostics for
  x-ray characterization plus a roll away undulator
  option
• Even these are difficult and still under study

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Undulator System Review March 04

• System Integration
• The committee felt we must focus attention on
  system integration. We agree.
• However, effort since this review has been
  focused on preparation for the EIR.
• Staffing Profile
• Again it is pointed out that the staffing
  increase into FY05 is steep. We understand this
  and are doing our best to plan and prepare for
  it.
• Risk Registry and Issues Log
• Keeping track of critical and near critical
  tasks.
• Suggested the development of one. Again we agree
  that this is a good idea and will be implemented
  in the near future.

34
Undulator System Review March 04

• NdFeB vs. Sm2CO17
• Committee not ready to endorse NdFeB material
  choice
• Committee would prefer to see variable strength
  quadrupoles
• Committee endorsed at least a manual retraction
  system for the undulator
• They suggest a thorough system prototyping even
  at the expense of a delay in the 1st article
  undulator
• Defer prototyping the granite base
• Begin prototyping of vacuum systems
• BPM
• Felt to be very near critical path.
• It is and we will need to start moving on this
  soon.

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Conclusion

• A prototype undulator has been thoroughly tested
  and documented
• The vacuum chamber is ready to be prototyped
• Effort for x-ray diagnostics will be placed on
  the end-of-undulator diagnostics suite
• More effort will be placed on the RFBPM when
  resources become available
• Controls integration planning is starting and
  moving along well
• A schedule and basis of estimate has been
  constructed and is near ready for the EIR