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Non-Scaling FFAG Lattice design for Radioactive Ion Beams

This article discusses the concept of non-scaling FFAG lattice design for radioactive ion beams and presents the layout of the Radioactive Ion Accelerator (RIA). It explores Thomas Roser's idea and the associated challenges, providing an example from Dejan Trbojevic's FFAG07-Grenoble work. The article also highlights the basic parameters of RIA, including the RFQ/Linac, injection rings, extraction, and target station.

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Non-Scaling FFAG Lattice design for Radioactive Ion Beams

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  1. Non-Scaling FFAG Lattice design forRadioactive Ion Beams • Introduction • Again little bit about non-scaling FFAG • present RIA layout • Thomas Roser’s idea and problems. • An example. Dejan Trbojevic: FFAG07-Grenoble

  2. Dejan Trbojevic: FFAG07-Grenoble

  3. Dejan Trbojevic: FFAG07-Grenoble

  4. Dejan Trbojevic: FFAG07-Grenoble

  5. Dejan Trbojevic: FFAG07-Grenoble

  6. Dejan Trbojevic: FFAG07-Grenoble

  7. Dejan Trbojevic: FFAG07-Grenoble

  8. Dejan Trbojevic: FFAG07-Grenoble

  9. Introduction: Dejan Trbojevic: FFAG07-Grenoble

  10. Basic RIA parameters. Dejan Trbojevic: FFAG07-Grenoble

  11. Basic RIA parameters:medium b linac Dejan Trbojevic: FFAG07-Grenoble

  12. Basic RIAparameters:High-b linac Dejan Trbojevic: FFAG07-Grenoble

  13. RIA cavities Dejan Trbojevic: FFAG07-Grenoble

  14. FFAG heavy ion driver –Thomas Roser 400 MeV/u, 400 kW, 1 kHz  6.3 x 1012 nucleon/pulse = 2.6 x 1010 U/pulse = 4.2 pmA (OK for ECR) Use EBIS as space charge neutralized accumulator. Extract pulses for single turn injection. Accelerate multiple charge states. Energy choices: Kinetic E Momentum Beta Rev. Frequency (C=153m) Injection Ring 1 10 MeV/u 137 MeV/c/u 0.145 0.28 MHz Injection Ring 2 67 MeV/u 381 MeV/c/u 0.359 0.70 MHz Extraction 400 MeV/u 954 MeV/c/u 0.713 1.39 MHz Ring 1: U28+; (Br)max = 9.2 Tm  B ~ 0.8 T for 50% filling factor; 1ms acc. time  500 turn acceleration  2 MeV/turn  40 keV/m for 50 m rf  broadband Finemet cavities? Ring 2: U56+; (Br)max = 12.2 Tm  B ~ 1.0 T for 50% filling factor; 1ms acc. time  1000 turn acceleration  3 MeV/turn  60 keV/m for 50 m rf  broadband Finemet cavities? Ring 1 Ring 2 To target station and fast fragment spectrometer U28+ U56+ ECR EBIS RFQ Linac 10 MeV/n 67 MeV/n Stripper 400 MeV/n Dejan Trbojevic: FFAG07-Grenoble

  15. High energy ring parameters dp/p=+-50%238U56+ Dejan Trbojevic: FFAG07-Grenoble

  16. High energy ring parameters dp/p=+-45%238U56+ Dejan Trbojevic: FFAG07-Grenoble

  17. Lower energy ring parameters dp/p=+-45%238U28+ Dejan Trbojevic: FFAG07-Grenoble

  18. Orbits within a single cell: 76 cells Circumference=256.88 m lf=0.6m +90 mm -40 mm 9 cm Cavity 1 m ld=1 m 3.3800 m Dejan Trbojevic: FFAG07-Grenoble

  19. Orbits magnified 100 times RADIUS =40.8837 M C =256.88 m Dejan Trbojevic: FFAG07-Grenoble

  20. Tunes vs. momentum RIA example Dejan Trbojevic: FFAG07-Grenoble

  21. Dejan Trbojevic: FFAG07-Grenoble

  22. Magnetic fields: Bd(x=o) = 1.249019993 T Gd= -10.422969 T/m Bf (x=0)= -0.40 T Gf=+9.793860455 T/m Bdmin = Bo + 69.2 mm * (-10.42 T/m) = 0.52 T Bdmax = Bo +(- 18 mm) * (-10.42 T/m)= 1.43 T Dejan Trbojevic: FFAG07-Grenoble

  23. 60 cells Dejan Trbojevic: FFAG07-Grenoble

  24. Dejan Trbojevic: FFAG07-Grenoble

  25. Dejan Trbojevic: FFAG07-Grenoble

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