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ISIS Accelerator Developments at Rutherford Appleton Laboratory

Explore the advancements in ISIS accelerator technology at Rutherford Appleton Laboratory, home to the world's leading spallation neutron source. Learn about key quantities, obsolescence mitigation, and new equipment replacing ageing components.

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ISIS Accelerator Developments at Rutherford Appleton Laboratory

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  1. ISIS Developments David Findlay Accelerator Division ISIS Department Rutherford Appleton Laboratory ISIS OPTIMVS NEVTRONVM SPALLATIONENSIVM FONS MVNDI

  2. ISIS — world’s leading spallation neutron source • But ISIS accelerators primarily a neutron factory • ~800 experiments/year • ~1600 visitors/year • Output and reliability are key quantities

  3. ISIS from air

  4. ISIS outline • 17 kV H– ion source • 35 kV DC gap • 665 keV RFQ — new • 70 MeV drift tube linac • 800 MeV proton synchrotron — new 2RF • Target station 1 — 50 pps at present40 pps when TS-2 running • Target station 2 — 10 pps — new • Obsolescence mitigation — on-going

  5. 10 amp-hours delivered on 12 December 2005 • 36,000 C • 2.25E+23 protons • 4.4E+24 neutrons • 7.5 g neutrons • ~£30M/g

  6. 202½ MHz 4-rod RFQ LEBT Ion source

  7. RFQ rods + stems assembly

  8. Old Cockcroft-Walton

  9. 2RF: High power driver Cavity

  10. Four 2RF cavities in Straights 4, 5, 6 & 8

  11. 4 × 200–2000 A cavity bias regulators

  12. 4 × 20 kV, 10 A anode power supplies

  13. Obsolescence mitigation • Replacing ageing equipment • E.g. the NINA big choke • linac RF systems • extraction fast kickers • ...

  14. Old and new chokes for synchrotron main magnet power supply

  15. Extraction kickers: 5000 A, 100 ns rise time

  16. Tantalum wire shock tests for neutrino factory target

  17. Tantalum wire during and after pulsing

  18. Aim of RFQ + 2RF: 200 µA → 300 µA • New beam dynamics régime in synchrotron • Commission 2RF with beam — Andy Seville • Beam losses — Steve Payne • Diagnostics — Ben Pine

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