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SLAC ARD Test Facilities

SLAC ARD Test Facilities. Tor Raubenheimer February 9 th , 2012. Test Facilities at SLAC. Accelerator Research requires R&D facilities Development has a long timeline Important to have facilities with different energy scales Need to match problems to scale of facilities

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SLAC ARD Test Facilities

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  1. SLAC ARD Test Facilities Tor Raubenheimer February 9th, 2012

  2. Test Facilities at SLAC • Accelerator Research requires R&D facilities • Development has a long timeline • Important to have facilities with different energy scales • Need to match problems to scale of facilities • High energy facilities for unique problems • Low energy facilities more flexible and faster turn-around • ASTA/CTF; NLCTA; FACET/ESTB; ITF/FACET-II • Test facilities are expensive • Even small facilities are expensive to operate and maintain • University participants require more of a user facility paradigm • Model for facility support is changing but is critical for future R&D • Need plan for development and funding of Test Facilities

  3. Example: NLCTA beam physics R&D • Thz - Tunable, narrow band THz generation • AO - All-optical mapping of the e-beam longitudinal ph. sp. • OL - Linearization of the microbunching phase space with 2+ laser harmonics • SC amplifier – Study microbunching and space-chare • OAM-FEL - Efficient up-conversion of transverse mode in FEL to generate light modes with associated orbital angular momentum. • Echo-75 – use EEHG technique to generate 75th harmonic • Technology demonstrations: cryo-undulator, rfundulator, …

  4. Need a Plan • Very high level plan was developed which focused on ITF • ASTA and NLCTA have not been part of the future plans of the laboratory • Not clear that omission is entirely intentional • Good to have ambitious plans but very unclear messages to DOE and lab personnel • May be important to make choices but important to be realistic about funding and timescales • Many opportunities for future evolution: ASTA  CTF; NLCTA  ICS, UED or beam physics user facility • Loss of capability is largely not recoverable • I believe the breadth of test facilities has been critical for ARD and will continue to be so

  5. High Brightness Injector ProgramThree Parallel Experimental Efforts Cathode Test Facility ASTA FacilityPhotocathode R&D aimed atunderstanding LCLS lifetime and damage issues Test rf gun modifications before installation in LCLS-I or II LCLS-II InjectorIncremental upgrade ofLCLS-I with opportunityfor R&D during commissioning Injector R&D Program NLCTA FacilitySimulation and experimentalprogram aimed at significantimprovement in brightness Longer term R&D aimedat high brightness cathodes with lower thermal e (coatings, smoothness, new materials) Construction in ~2014and commissioningin ~2015 to study injectorphysics before LCLS-IIoperation • Design studies on rfgun design, CSR micro-bunching and cathodes • Rfgun development andtesting at NLCTA in 2012 • NLCTA R&D on injectorbeam physics Combined HB program requires ~3M/yrnew funding

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