Transcript Document 7259742

Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
LCLS Undulator Diagnostics and Comissioning Workshop
John N. Galayda, Stanford Linear Accelerator Center
19 January 2004
Challenges of Commissioning the FEL
Alignment
Undulator K
Undulator Damage
Undulator Diagnostics
Commissioning
Operation
Charge
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
1
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
The World’s First Hard X-ray Laser
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
2
Introduction
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Near Hall
FEL Center
Far Hall
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
3
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Conventional Construction
Transport
Undulator
Near Hall
Tunnel
Far Hall
3 Beams/mirror
FEL Center Lab/Office
Expansion
Room for
Spontaneous source or soft XRFEL in RSY
Additional undulator in LCLS tunnel
8 or more additional undulator lines
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
4
John N. Galayda, SLAC
[email protected]
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Linac Coherent Light Source
Conventional Construction
Transport
Undulator
Near Hall
Tunnel
Far Hall
3 Beams/mirror
FEL Center Lab/Office
50m
>288m ?
What are cost implications of moving beam dump and near hall backward, placing
the Near Hall ground floor underneath the FEL Center?
What are the cost implications of moving the Far Hall further east?
How do the dimensions of the Far Hall affect cost?
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
5
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Estimated Cost, Schedule
Readiness
$220M-$260M Total Estimated Cost range
$265M-$315M Total Project Cost range
Schedule:
FY2003 Authorization to begin engineering design
Emphasis on injector and undulator
FY2005 Long-lead purchases for injector, undulator
FY2006 Construction begins
January 2007 Injector tests begin
October 2007 FEL tests begin
September 2008 Construction complete
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
6
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Challenges for Diagnostics in the Undulator Channel
Tolerances on Trajectory are Tight for SASE at 1.5Å
Beam-based alignment, RFBPMs must deliver a good
trajectory
Tolerance on K of an undulator is around 1.5 x 10-4
Equivalent to 50 micron vertical misplacement
This displacement does little to the electron optics
This displacement does little to the spontaneous spectrum of 1
und.
Piezo end tuners provide adjustment equivalent to K~ 4x10-4
Radiation Damage to Undulators is a Concern
Interlocks will be implemented but tolerable losses are low
Can the diagnostics identify a damaged undulator?
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
7
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Charge – Will the Undulator Diagnostics Serve Commissioning and Operations Needs for the LCLS?
Commissioning
Can diagnostics be used to troubleshoot the new hardware?
Can diagnostics be used to guide path to saturation?
Operations
Will the diagnostics permit simple and speedy troubleshooting?
Reliability/Availability goals of the LCLS will be those of a light source
Light diagnostics are crucial
Can the diagnostics survive at high power?
If not, are we placing too heavy a reliance on data taken with low
charge?
What are the alternatives?
Variable gap?
Rollaway undulators?
Do we have redundant diagnostics capability where appropriate?
Diagnostics that check the diagnostics
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
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John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Point of No Return
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
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John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
End of Presentation
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
10
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Preliminary Schedule
CD-0
CD-1
CD-2b
CD-2a
FY2001
FY2002
Design
FY2003
2002
CD-3b
Title I
Design
Complete
2003
FY2004
2004
FY2005
2005
FY2006
2006
FY2007
FY2008
Operation
Construction
CD-3a
Critical Decision 0 – Mission Need
Critical Decision 1 – Preliminary Baseline Range
Start Project Engineering Design
Critical Decision 2a – Long-Lead Procurement Budget
Critical Decision 2b – Performance Baseline
Critical Decision 3a – Start Long-Lead Procurements
Fund Long-Lead Procurements
Critical Decision 3b – Start Construction
Fund Construction
Construction Complete
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
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FY2009
June 13, 2001
October 16, 2002
October 2002
June 2003
April 2004
August 2004
October 2004
August 2005
October 2005
End of FY2008
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Simultaneous Delivery of Beam to 3 Endstations
Final Focus Test Beam Extension
Hall A
Tunnel
Hall B
Damage
Power density
Wavelength
Obliquity
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
12
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Key Considerations for Conventional Facilities Design
Shielding Enclosure, Vehicle Access in Research Yard
Vibration Stability
Location of Far Hall, Elevation at Far Hall Site
Potential for Expansion, Additional Undulators
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
13
John N. Galayda, SLAC
[email protected]
Linac Coherent Light Source
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
No Anticipated Change in Requirements for:
Research Yard
Overpass
Undulator Hall (exc. length)
X-ray Tunnel (exc. length)
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
14
John N. Galayda, SLAC
[email protected]
Stanford Synchrotron Radiation Laboratory
Stanford Linear Accelerator Center
Linac Coherent Light Source
Linac Coherent Light Source
Project Description
FFTB Tunnel
SLAC Linac
Undulator Hall
RF
Gun
Near Hall
Gun-to-Linac
Two Chicanes for bunch compression
Cathode Load
Lock
FEL Center
L0 Linacs
L0-1
Gun Solenoid
Far Hall
L0-2
Linac Solenoid
Matching Section
Scale:
5 meters
Quadrupole,
typ.
RF Transverse
Deflector
DL1 Bend
LCLS Undulator Diagnostics Workshop
Opening Comments and Charge 19 January 2004
Linac Center
Line
15
Sector 21-1B
John N. Galayda, SLAC
Sector 20 Linacs
Emittance
Energy Wire
Wire Scanners
[email protected]
Scanner & OTR
Straight Ahead
Tune-Up Dump