1. LCLS Undulator System Detailed Report
7/31/2019
LCLS Undulator System Detailed Report
DOE Review: Undulator Subcommittee Session
24 October 2006
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2. Focus of this Talk Will Not Focus on the Successes
7/31/2019
Focus of this Talk
Will Not Focus on the Successes
We have had many and all major ones either have already been reported briefly at the plenary session or will be reported by the various speakers
Will Focus on Where We Are
We are focused now on making certain we deliver all components on time, within budget and to specification
Will Mention
Discussion of topics not yet presented to the committee or not being presented by others
Well Look at ETC, BOE, and Level 3 Milestones
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3. Where We are With Controls Vacuum Chamber Quadrupoles Major Contracts
7/31/2019
Where We are With
Controls
Interface Definitions
Transfer of Information
Vacuum Chamber
Project management point of view
Parallel Efforts
Physics Viewpoint
Quadrupoles
Hysteresis Effects
Delivery Schedule
Major Contracts
Creation
Management
Beam Loss Monitor
Status
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4. Controls SLAC now leading nearly all controls efforts
7/31/2019
Controls
SLAC now leading nearly all controls efforts
Recent estimate to completion exercise and rework of the P3 schedule leaves many opportunities for dropped balls.
Need to set up a detailed compilation of all controls items and responsibilities. This needs to be handed to SLAC controls so that they understand what it is that is required of them.
Need to sit down with SLAC controls and go through in detail what is in the schedule.
Hamid is Very Busy
He will assign a SLAC/ANL Controls liaison person much like we have for all the mechanical items. This person will work directly with the ANL LCLS controls technical lead to ensure than the controls interfaces and exchange of information proceeds seamlessly.
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5. Project Management Point of View
7/31/2019
Vacuum Chamber
Project Management Point of View
The prototype delivery date continues to slip. At this point if the prototype has a real problem then we have little or no time to correct for it.
Right now the vacuum chamber is roughly 20 days off from driving the undulator system assembly.
It is further away from driving the project critical path, but not enough to feel comfortable
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6. Vacuum Chamber Parallel Efforts
7/31/2019
Vacuum Chamber
Parallel Efforts
Pursue the primary vacuum chamber plan with vigor
Also pursue a backup.
This effort is being lead by SLAC with input from ANL
The goal is to have a backup chamber plan in the event that the primary chamber runs into problems.
Every effort is being made to ensure that the pursuit of this backup plan does not in any way impede progress towards the primary chamber effort.
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7. Vacuum Chamber Physics Viewpoint Difficult requirements Effect on beam
7/31/2019
Vacuum Chamber
Physics Viewpoint
Difficult requirements
Some even difficult to define clearly
Effect on beam
May be difficult of impossible to ever determine
Non-unity Permeability of SS
Will impact field but more or less uniformly
As long as the random variation of K/K between undulators is kept below 1.5e-4 then the requirement is met
A slight increase in the overall field should not matter.
Choice of Steel (low permeability under all conditions)
316LN difficult to obtain locally. Some availability in Europe.
20Cb-3 Available locally and with short lead time.
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8. Capenter Steel 20Cb-3 Specifications
7/31/2019
Capenter Steel 20Cb-3 Specifications
Found Online
We Find
Electrical Properties
Electrical Resistivity ohm-cm
Magnetic Permeability
Magnetic Permeability 1.01
The important thing is that it is nearly constant up to 2 T
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9. Quadrupoles Hysteresis Effect
7/31/2019
Quadrupoles
Hysteresis Effect
Corrector coils act in “common” while quadrupole coils act differentially across poles
Places poles on different hysteresis paths
Need to use soft magnetic steel
Low remenance and low coecivity
Working with vendor and asking for expert advice on this
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10. ‘QG’ Gun-to-Linac Quadrupole Magnets
7/31/2019
‘QG’ Gun-to-Linac Quadrupole Magnets
-6 Amps
+6 Amps
-6 Amps
+6 Amps
From P. Emma
r  20 mm
Leff  7.6 cm
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11. Quadrupoles Delivery Schedule Quadrupoles are near the critical path
7/31/2019
Quadrupoles
Delivery Schedule
Quadrupoles are near the critical path
They are certainly what holds up the assembly
Working directly with the vendor to refine their production schedule
Examples
Buy all materials up front. Don’t wait until after the 1st article has been accepted.
Use methods of construction that the vendor has experience with.
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12. Major Contracts Still to be placed To be placed by Managing
7/31/2019
Major Contracts
Still to be placed
Some vacuum system processes
Vacuum Support Structure
Support Mover system
Expect the vendor to deliver simple “kits”
RF BPMs
Bodies and receivers
Beam Finder Wire
To be placed by
Most by the beginning of the year
Vacuum by February
Managing
Will tap into the experience gain from the management of the undulators to manage all further contract to completion
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13. Beam Loss Monitor Schedule Multitier Approach
7/31/2019
Beam Loss Monitor
Schedule
Late start up, but still significantly off the critical path
No items in vacuum or in need of precision alignment during assembly
Multitier Approach
Follow DESY Example
Don’t reinvent the wheel
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14. Beam Loss Monitor Multiple Detectors
7/31/2019
Beam Loss Monitor
Multiple Detectors
Scintillators/Cerenkov Detectors coupled to PMTs
For low loss conditions
Needs calibration
Can achieve a broad detection dynamic range if allowed to vary the HV
Cerenkov Detectors
Thin optical fibers arranged around the vacuum chamber
Not sensitive to extremely low losses
Not simple to calibrate absolutely
Fiber optic
Long FO which browns as a function of dose at a known rate
Used for long term dose measurements
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15. Short Break: BLM (Hi Sensitivity) Location
7/31/2019
Short Break: BLM (Hi Sensitivity) Location
BFW Ø10mm x 25mm long
BFW Ø18mm x 19mm long
Bellows Ø10mm x 76mm long
BLM 5mm x 12.5mm x 25mm long
RFBPM Ø10mm x 75mm long
Beam Guide Vacuum Chamber 5mm x 12.5mm x 3467mm long
Quad Spool Ø8mm x 158mm long
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16. TEC Estimate to Complete
7/31/2019
Cost to Go at WBS Level 3
1.04 Undulator System
$M, Burdened, Escalated
TEC Estimate to Complete
Contingency %
Contingency
Total Estimated Cost (TEC)
19.60
18.8%
3.68
Undulator System Management & Integration
1.97
0.4%
0.01
Undulator Magnet & Support
12.35
19.9%
2.46
Vacuum System
2.29
19.7%
0.45
Diagnostics
2.04
21.8%
0.44
Undulator System Installation and Alignment
0.96
33.4%
0.32
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17. 7/31/2019
Basis of Estimate
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18. 7/31/2019
Level 3 Milestones
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19. We have accomplish a lot over the last 6 months
7/31/2019
Summary
We have accomplish a lot over the last 6 months
But there is still a lot to finish
We understand out tight areas such as the vacuum chamber and are placing a full attention on these item.
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