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Summary of Working sessions on July 8 in WG2

Summary of Working sessions on July 8 in WG2. Determined beam specifications and machine constraints. Determined machine parameters which we need to start feasibility study. Made job list and job assignment.

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Summary of Working sessions on July 8 in WG2

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  1. Summary of Working sessions on July 8 in WG2 • Determined beam specifications and machine constraints. • Determined machine parameters which we need to start feasibility study. • Made job list and job assignment. • Made time table about each job, related talk and progress repot about job for individual. • T.Baba, T.Nagayama and H.Tanaka gave talks related to electron machine. y.ishi

  2. Beam specs and machine constraints carbon electron Beam specifications - beam energy 400MeV/u 0.5MeV - beam current 1x6nA 20mA - repetition rate 120(240)Hz 50(60)Hz - pulse width NA NA - emittance <10pimm-mrad NA - Dp/p +-0.2% NA Machine (system) constraints - circumference 45m 1.5m - initial/running cost(acc.) 3B\ 20M\ - power consumption 5MW 20kW - operation 1person 2shift 0

  3. Initial parameters which we need to get started • Electron machine • - Lattice type spiral • - Radius at extraction 0.7m • - Injection energy 50keV • - Extraction energy 500keV • - Initial current from electron gun 100mA • - Vertical tune shift 0.8 • - ey 50pmm-mrad • - Vgap 100V

  4. 2. Carbon machine • Preinjector type RFQ+DTL • Energy at the exit of RFQ(C6+) 0.75MeV/u • Energy at the exit of DTL 1.75MeV/u 7MeV in H+ • -Extraction energy of the booster 62MeV/u 230MeV in H+ • -Extraction energy of the main ring 400MeV/u (1.2GeV in H+) • -repetition rate 120(240）Hz • -Lattice type of the booster radial FDF variable k • -Lattice type of the main ring spiral • -Magnet scheme SC (in order to reduce Ploss)

  5. Summary a.m. p.m. Evening 8(Tue) Nagayama “Core” Baba “EB” Tanaka “Laptop” 9(Wed)Meot “ Carbon machine” Ogitsu “Super con-mag” Ishi ”Hyogo-Therapy machine” Yoshimoto “poleface winding” Tanaka “Electron Lattice” 10(Thr)Ishi “carbon Lattice” Yonemura “Massless septum” Iwashita “Massless septum” Yonemura “Electron massless” 11(Fri) Kaneko “Electron machine in Industry” WG2Program Talk Progress Report

  6. Electron ring related talks (evening session) • T.Baba gave a summary talk about Japanese irradiation business.(unfortunately not available on web) We confirm that our parameters of FFAG electron machine is reasonable in commercial sense. • T.Nagayama gave design concept of the induction core. • H.Tanaka gave a new type of extremely small FFAG-like electron ring which is under development. Energy 5-10MeV, weight ~150kg,diameter 400mm.

  7. V=dF/dt Duty=(tb-ta)/ts =x（1-Vta/DBs) V=DBs/tb x=tb/ts need high x to obtain high Duty enlarge DB and/or s

  8. Today’s plans Talks • Carbon therapy machine project in France by Meot • Carbon therapy machine parameters in Hyogo Japan by ishi • Making field gradient with SC magnet by Ogitsu • Pole-face winding by Yoshimoto Progress report • Lattice design of electron spiral ring by Tanaka

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