LCLS-II Scientific Opportunities WorkshopsLCLS-II Status

David Schultz

9-12 February 2015

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LCLS-II ConceptUse 1st km of SLAC linac tunnel for CW SCRF linac

LCLS-II Scientific Opportunities

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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)

South side source:1.0 - 25 keV (120 Hz, copper” linac )1.0 - 5 keV (≥100 kHz, SC Linac)

4 GeV SC Linac In sectors 0-10

NEH FEH14 GeV LCLS linac still usedfor x-rays up to 25 keV

North side source:0.2-1.2 keV (≥ 100kHz)

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Project Collaboration

• Cryomodule engineering/design• Cryomodules: ~1/2 of total• Liquid helium distribution system

• Cryomodules: ~1/2 of total• Cryoplant design and procurement

• Undulators • e- gun & associated injector systems

• Undulator Vacuum Chamber• Undulator design: vertical polarization

• Cryomodule R&D, prototype support• e- gun option

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

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

200 eV requires <4 GeV

Cu Self Seeded

High Rep Rate SASE

Self Seeded (Grating)

Cu SASE

Photon Energy (keV)0 5 10 15 20 25

SC LinacHigh Rep Rate

Cu Linac

Legend

4.0 GeV

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Project Timeline

• BESAC subcommittee report July 2013

• LCLS-II starts a response to the report July 2013

• Mission Need Statement signed Sep 2013

• Approval, CD-1 Jun 2014

• Purchase niobium materials for cavities Oct 2014

• 4.2K refrigeration plant award Apr 2015

• Prototype accelerating modules test Dec 2015

• Remove copper linac, first km Jun 2016

• All cryomodules at SLAC Sep 2018

• Cryoplant installed Dec 2018

• First Light Jan 2020

• 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