Description of the LCLS
Undulator System
Stephen Milton
Argonne National Laboratory
Office of Science
U.S. Department of Energy
A U.S. Department of Energy
Office of Science Laboratory
Operated by The University of Chicago
Overview
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Undulator Systems WBS 1.2.3
Undulator Systems WBS 1.4
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Cell structure of the LCLS
Undulator Line
3420
657
421
UNDULATOR
11528 mm
Horizontal Steering Coil
Vertical Steering Coil
Beam Position Monitor
X-Ray Diagnostics
33 Undulators
~ 130-m
Overall Length
Quadrupoles
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List of the Undulator Line
Systems
• Undulator module
– Magnets
– Poles
– Strongback
– Other
• Mechanical support - movers
• Quadrupole Lens
• Coils - correctors
• E-beam position monitors
• X-ray diagnostics
• Undulator vacuum chamber and diagnostics station
• Controls and data acquisition
• Support laboratory - magnet measurement facility
– Technical Definition and Oversight Only
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LCLS Project
Engineering
Design
Organization
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UCLA
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PED Organization
LCLS Undulator Management
Project Leader
Fabrication Management
Project and Contract Assistant
S. Milton
J. Noonan
F. Coose
Diagnostics And Vacuum
Controls
Magnet Systems
D. Walters
J. Stein
J. Noonan
Low Power X-ray Diag.
Magnet Systems
2nd Prototype
High-Power X-Ray Diag.
X-ray Diagnostics
Undulator Magnets
End of Und. X-ray Diag.
Electron Beam Diagnostics
Quadrupole Magnets
Electron Beam Diag.
Vacuum System
Supports
Vacuum System
Machine Protection System
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Prototypes
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Undulator Design Issue
• Field Variations
– Must Maintain DB/B < 1 x 10-4
• Implies gap changes of < 1 mm
• And to maintain temperature to within 0.4 C
• Partial Compensation
– Accomplished by Differential expansion of the
titanium strong back and the aluminum magnet array
comb.
– This helped, but did not fully compensate the device
– A Clever Field Control Scheme will be used
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Full Length Prototype
[]
V ert. TrajectoryH or. Trajectorymm
Performance Measured to
be within the Design
Specification
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
2.0
-2000
1.5
1.0
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2000
A s A ssem bled
A fter Final Tuning
-1000
0
2000
z [m m ]
A s A ssem bled
A fter F inal T uning
-1000
0
z [m m ]
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1000
1000
2000
Device
completed over
a year and ½
ago.
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2nd Prototype
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Undulator System Schedule
F03
F04
F05
F06
F07
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
Critical Decisions
CD-2a Long-Lead Procurement Budget Approval
CD-2b Performance Baseline Approval
CD-3a Long-Lead Procurement Approval
and Authorize Long-Lead Procurement Funds
CD-3b Start of Construction Approval
and Authorize Construction Funds
CD-4 Start of Operation Approval
Phases
PED Period
Construction Period
Key Milestones/Events
Begin Conctrols Specifications
1st Vacuum Pipe Prototype
Prepare Und. Bid and Procurement Packages
Complete 2nd Undulator Prototype
1st Diagnostics Prototype
Begin Long Lead Purchases
Complete 1st Production Diagnostics
Complete 1st Production Undulator
Assemble 1st Full Module
Begin Purchase of All Other Components
Assemble and Measure Undulators
Assemble Diagnostics
Install Undulator System
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Milestone Summary of Schedule
Milestone
Design of 2nd undulator prototype complete
Assembly and Testing of 2nd prototype undulator complete
Bid package for undulator assembly complete
First production undulator complete
33rd production undulator complete
Installation of undulator system complete
Date
2/04
9/04
7/1/05
7/1/05
6/1/07
7/1/07
See J. Noonan’s presentation for a
more thorough summary and
explanation
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Where We Stand
• In the Project Engineering Design Phase
• Need to ramp up in staffing…quickly!
• 10 to 15 people working full time within 6 months to 1 year
• People will be drawn from APS and ANL when possible
• Contract work out as necessary
• Project will be Baselined in April 2004
• Long-lead procurements begin in FY05
• “Real” Construction begins in FY06
• Undulator installed and ready to go in Summer 2007
• First Operations in Winter 2008
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Charge for the LCLS Undulator Magnet Review Committee: Nov. 14th, 2003
1. Review the overall design and design/engineering decisions/solutions used for
the 1st prototype undulator magnet and comment on the appropriateness of
these decisions with respect to minimizing risk in meeting LCLS performance
specifications. In particular, is this a robust design capable of being mass
produced.
2. Assess the overall quality and appropriateness of the measurements and tuning
methods. In particular, has a suitable set of measurements been carried out on
the 1st prototype to prove that it has achieved the required specifications without
undue difficulty in manufacturing, and has this design been proven to be
sufficiently stable over time?
3. Based on the knowledge gained from the 1st prototype have the appropriate
design modifications been made and, in your opinion, will they be successful in
a mass produced device?
4. The 2nd prototype will be constructed in a manner similar to the acquisition plan
for the production run. I would like your comments on the acquisition plan and
schedule for the 2nd prototype and the production magnets.
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