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Discussion on Studies at Test Stands

Discussion on Studies at Test Stands. Roger Ruber Uppsala University. RF Generation and Distribution System. 200 cavities (352 + 704 MHz) 200 RF systems: modulator, klystron, distribution, controls 5 MW beam → 20 MW RF, (losses and LLRF overhead) R&D objectives

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Discussion on Studies at Test Stands

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  1. DiscussiononStudies atTest Stands Roger Ruber Uppsala University

  2. RF Generation and Distribution System • 200 cavities (352 + 704 MHz) • 200 RF systems: modulator, klystron, distribution, controls • 5 MW beam → 20 MW RF,(losses and LLRF overhead) • R&D objectives • energy efficiency andoperational costs reductions • produce technical design, with cost estimate, to start tendering Roger Ruber - Discussion on Studies at Test Stands

  3. Test Stand Objectives • Prototype baseline design and acceptance testing of production elements • ion source • RFQ, bunchers, DTLs, spokes and elliptical cavities • power couplers, tuners, cryo-modules • RF system including power sources, distribution and controls (LLRF) • 200 Accelerating structures and RF distribution points • minor fault might create a major risk • must ensure low beam loss operation • to prevent activation of accelerator components • major part of the accelerator budget • must be cost, energy and resource effective for construction & operation • Training of future staff • participate in prototyping to prepare for operation Roger Ruber - Discussion on Studies at Test Stands

  4. FREIA: RF and Cryogenic Facilities • Test Facility at Uppsala University • prototyping of LLRF and HLRF solutions • training of students and staff • 4 Years development phase • 2011 – 2012: design, tendering • 2013 – 2014: commissioning, R&D RF systems (components & concepts) • 2015 and beyond: energy efficiency, component testing • Hardware: • HV pulse modulator • 704 MHz klystron (1.5 MW) • RF distribution system • LLRF system • 2 SRF elliptical cavities • helium liquefier Roger Ruber - Discussion on Studies at Test Stands

  5. Proposals for Possible Test Stand Program • Alternatives HLRF generation and distribution • prototyping, sufficient contingency in the design • test alternatives in relation to staging of beam power and energy • multiple cavities per klystron,min. overhead on possible vector modulator • multiple klystrons per modulator • Energy efficiency and recovery • higher efficiency klystrons (long long future) • energy recovery from klystron/load’s cooling water • Limits in cavity performance • HOM couplers:multipactoring and use as BPMs • multi-cavity field emission Roger Ruber - Discussion on Studies at Test Stands

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