Undulator System Update
Stephen Milton, ANL
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Outline
Management
Vacuum/Mechanical
Diagnostics
Controls
Undulator
Magnet Measurement Facility
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Management: Organization
Very little change since last meeting
APS
LCLS Undulator
LCLS Project
J.M. Gibson
S. Milton
J. Galayda
Assoc. Lab. Director
Project Director
Project Director
Accel. Systems. Div.
D. Walters
H.D. Nuhn
R. Gerig
Vacuum/Diagnostics
Undulator System
Division Director
CAM
Physicist
Exp. Facilities Div.
M. White
R.Ruland/MMF
E. Gluskin
Magnet Systems
J. Welch/Fixed Support
Division Director
CAM
CAM
APS Operations Div.
J. Stein
W. Ruzicka
Controls
Division Director
CAM
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Management: Cost/Schedule
Impact of Continuing Resolution
Long-Lead Procurements
Original plan was to be ready to sign contracts November 2004
Now planning on a minimum of 4 months delay
Have replanned accordingly
Replan almost complete, but needs some final review
Acquisition Plan
Still plan on purchasing Ti strongbacks, magnet blocks, and magnet poles
and then having the assembly done by two mechanical assembly vendors.
We have asked and have been given the nod to go forward with two 1st article
undulators produced via the above plan.
We believe that by doing this we will mitigate the risks in the best possible
manner.
33rd Undulator Expected Completion Date
June 2007
This is later than before by about 4 months, but is still well within the new replan
guidelines
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Management: Costs/Schedule (Cont.)
FY05 Ramp up of ANL people
The current replan shows the following
These numbers have been given to Murray Gibson and he feels they are within the
capabilities of the APS to handle
ANL LCLS Effort Profile FY05
30
ANL Site Engineering
ANL Project Manageme
Number
25
ANL Physicist - Scie
ANL Physicist - Post
20
ANL AD: Mech / Vacuu
ANL Mech Fab: Machin
15
ANL Mech Fab: Assemb
ANL Mechanical Engin
10
ANL Mech Drafting /
ANL Electrical Engin
5
ANL Controls: Techni
Based on this
profile a small
amount of
resource
smoothing will
be done.
ANL Controls: Progra
ANL Controls: Engine
0
OCT NOV DEC JAN FEB MAR APR MAY JUN
Month
12 October 2004
Undulator System Update
JUL AUG SEP
ANL Controls: Coordi
ANL Administration
Stephen Milton
milton@aps.anl.gov
General Responses to Previous FAC
System Integration
Integration of the undulator to the cradle to the girder to the …
Symmetric placement of the Granite to Undulators
Etc.
The above await the hiring of or assignment of an undulator system integration
engineer.
There are and have been plans but we have not had the resources to proceed with it.
We continue to keep integration in mind, but we really do need to find these
people
1 ANL and 1 SLAC
Start of Commissioning When Everything is a Mess
We just had a second diagnostics and commissioning workshop a few weeks
back and will certainly continue to refine our ideas on how to start
commissioning.
We also plan to prototype diagnostics whenever possible and test under near
actual conditions. This is and has always been in the plan.
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
General Responses to Previous FAC (Cont.)
Quadrupole Choice
We have chosen to drop the PM quadrupole in favor of EM Quads
This provides us a more robust method of doing the critical beam-based
alignment
Correctors will be in place to simplify quad center shifting
Rollaway Capabilities and Implementation
We will have remote capability to move all undulators horizontally
This allow many interesting opportunities
What moves and what does not
Cradle concept allows independent horizontal motion of the undulators
without moving the quadrupoles or BPMs
“Gross” alignment of the quadrupole and undulator centers will be done
with the cam movers with final quad center positioning done with the
correctors.
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
General Responses to Previous FAC (Cont.)
Acquisition Methodology/Choice
See previous statements
Temperature in Tunnel
The committee had recommended looking at
using lower temperatures in the tunnel, the
same as the natural tunnel temperature.
We do not feel that this provides a significant gain
over the life of the project
Once heated the tunnel should stay close to the
desired temperature due to the large mass involved
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Vacuum/Mechanical
Examples of Progress
(See Walters talk for
more details
Chamber Bellows
Assembly
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Vacuum/Mechanical
Examples of
Progress (See Vacuum
with
Walters talk Chamber
Supports
for more
details
Chamber
support for
moveable
undulator
capability
12 October 2004
Undulator System Update
Undulator
Undulator
Moves In &
Out
Stephen Milton
milton@aps.anl.gov
Vacuum/Mechanical
Examples of Progress (See Walters talk for more details
Chamber transition plan
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
AC Conductivity Concern
Could spoil the FEL
process enough to prevent
Cu or Al
According to the calculations
Al appears to be better than
Cu.
Also a flat (rectangular)
chamber appears to be
better.
Of course a larger gap also
improves matters
And this is the problem
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
AC Conductivity Concern
Serious study is presently underway to
assess this concern
See talks of Bane, Nuhn
Impacts could be
Different
Chamber material and/or geometry
Increase undulator gap
Different period
In the meantime
We are studying the construction of an Al
chamber with rectangular geometry
We have looked at the impact on LLPs
and how much of a gap change is
tolerable before a significant change must
be made
We will need to decide what we are
going to do soon
Such changes would impact just about
everything
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Diagnostics: OTR and Wire Scanners
Physics/Engineering Design
Very Mature
Sharing space side-by-side
OTR profiler
Wire scanner
X-ray diagnostics provision
Double crystal optics
Integrating detector (intensity)
Imaging detector (distribution)
See Bingxin Yang talk for
more details
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Diagnostics: BPM
Considering going to Cband vs. X-band
Resolution
Still relying on past
measurements as a proof of
principle
Status
Limited funds have been
available to pursue much
further than basic
engineering
See Dean Walters talk for
additional limited details
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Diagnostics: End of Undulator Concept
Differential Measurement of Spontaneous Signal
Bingxin Yang has an idea to use two undulator to
determine the effective K of one to another to a level of
better than 10-5
Dependent on movable undulators
See Bingxin’s talk for additional details
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Undulator System Controls
Coordination
Controls effort is being coordinated by Bob
Dalesio at SLAC
ANL will work closely with Bob to ensure smooth
integration of the undulator system controls with
the rest of the LCLS system
See Josh Stein’s and Bob Dalesio’s talk for
more details
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Undulator: Prototype Status
Value Engineered
Thoroughly
Most recently
Wingless poles
Aluminum magnet
block/pole holder
simplification
All measurement tested
Including before and after
transporting
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Undulator: Status of LLPs
Statement of Work
Complete for Ti stongback
Near complete for the poles and the magnet
blocks
Federal Business Opportunities (FedBizOps)
Requests for interest released
Will be used to qualify vendors
See Marion White’s talk for many more
details
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Undulator: Magnet Measurement Facility
Focus on Requirements (See Marion’s Talk)
Ensure the facility will meet the requirements
ESRF Bench
We are looking into the advantages and
disadvantages of this bench compared to the
one presently planned
We have their rough cost estimate
There will be a MMF review this Thursday
the 14th.
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov
Undulator System Update: Summary
Progress has been made in all areas
Diagnostics, Vacuum, Controls, Magnets and Supports
Continuing Resolution
We will be very constrained until this is resolved but…
…we can tough out this for a short period of time before
the impact becomes large
AC Conductivity
We need to understand the impact of this and make a
decision soon as to how we will proceed.
A change at this time will have a very large impact
But if it is required it is required
12 October 2004
Undulator System Update
Stephen Milton
milton@aps.anl.gov