Transcript LCLS-II Status

LCLS-II Status
LCLS-II Scientific Opportunities Workshops
David Schultz
9-12 February 2015
LCLS-II Concept
Use 1st km of SLAC linac tunnel for CW SCRF linac
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LCLS-II Project Scope
Accelerator
Superconducting linac: 4 GeV
Undulators in existing
LCLS-I Tunnel
New variable gap (north)
New variable gap (south), replaces existing fixed-gap und.
Instruments
Re-purpose existing instruments (instrument and detector
upgrades needed to fully exploit)
4 GeV SC Linac
In sectors 0-10
14 GeV LCLS linac still used North side source:
0.2-1.2 keV (≥ 100kHz)
for x-rays up to 25 keV
NEH
FEH
South side source:
1.0 - 25 keV (120 Hz, copper” linac )
1.0 - 5 keV (≥100 kHz, SC Linac)
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Project Collaboration
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Cryomodule engineering/design
Cryomodules: ~1/2 of total
Liquid helium distribution system
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Cryomodules: ~1/2 of total
Cryoplant design and procurement
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Undulators
e- gun & associated injector systems
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Undulator Vacuum Chamber
Undulator design: vertical polarization
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Cryomodule R&D, prototype support
e- gun option
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LCLS-II Cryomodules
35 Cryomodules, 12.6 m long, 1 m diameter
• LCLS-II Cryomodule follows the ILC design (shown)
• 8 SC cavities and a SC quadrupole magnet
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Baseline Deliverables
Cu Linac
4.0 GeV
SC Linac
High Rep Rate
0
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Legend
Cu SASE
Cu Self Seeded
High Rep Rate SASE
Self Seeded (Grating)
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Photon Energy (keV)
20
25
 Hard X-Ray Source:
 1-5 keV w/ 4 GeV SC linac
 Up to 25 keV with LCLS Cu Linac
 Soft X-Ray Source:
 250 eV-1.2 keV w/ 4 GeV linac
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200 eV requires <4 GeV
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Project Timeline
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BESAC subcommittee report
July 2013
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LCLS-II starts a response to the report
July 2013
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Mission Need Statement signed
Sep 2013
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Approval, CD-1
Jun 2014
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Purchase niobium materials for cavities
Oct 2014
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4.2K refrigeration plant award
Apr 2015
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Prototype accelerating modules test
Dec 2015
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Remove copper linac, first km
Jun 2016
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All cryomodules at SLAC
Sep 2018
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Cryoplant installed
Dec 2018
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First Light
Jan 2020
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DOE Critical Decision 4 (Level 1)
Sep 2021
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The LCLS-II Project: an extraordinary confluence of
• Institutional core competencies across the collaboration
• Talented, experienced scientists and engineers
• Strong management support at SLAC and the Partner Labs
• Outstanding support from DOE
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In Closing
• LCLS-II goals have been changed radically by the
reconfiguration of the project
• High average brightness
• The change had to come now- or else beyond 2030
• DOE has made a commitment to the long-term future of
SLAC as the home of the nation’s large-scale FEL
research facility
• I believe that DOE understands
• The scope of LCLS-II and its performance capabilities
• What LCLS ought to be in the long term
• Your input will determine the future capabilities of LCLS-II
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