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DESIGN STUDY OF MEDICAL CYCLOTRON SCENT300 Mario Maggiore on behalf of R&D Accelerator team

DESIGN STUDY OF MEDICAL CYCLOTRON SCENT300 Mario Maggiore on behalf of R&D Accelerator team Laboratori Nazionali del Sud Catania, Italy. CYCLOTRONS PROVIDING LIGHT IONS. SYNCHROTRONS are today used everywhere (japan, GSI, CNAO) for carbon beam therapy. IBA C235 RESISTIVE COILS. PROTONS.

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DESIGN STUDY OF MEDICAL CYCLOTRON SCENT300 Mario Maggiore on behalf of R&D Accelerator team

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  1. DESIGN STUDY OF MEDICAL CYCLOTRON SCENT300 Mario Maggiore on behalf of R&D Accelerator team Laboratori Nazionali del Sud Catania, Italy HIAT 2009, 9th June , Venice

  2. CYCLOTRONS PROVIDING LIGHT IONS SYNCHROTRONS are today used everywhere (japan, GSI, CNAO) for carbon beam therapy IBA C235 RESISTIVE COILS PROTONS CYCLOTRONS ACCEL\VARIAN K250 SC IBA C400 INFN SCENT300 PROTONS CARBON IONS SC CYCLOTRON • compactness and simplicity • lower size and cost  superconducting tech. • high beam modulation control  fixed energy (ESS needed) HIAT 2009, 9th June , Venice

  3. HIAT 2009, 9th June , Venice

  4. MAIN PARAMETERS HIAT 2009, 9th June , Venice

  5. INJECTION LAYOUT Einj=25 AKeV Vinflect= 14 KV gapinflect= 6 mm Einflect= 23KV/cm Vdee inj=70 kV Bo=3,15 tesla ECR sources HIAT 2009, 9th June , Venice

  6. CENTRAL REGION DESIGN Beam centering YC XC Energy gain Vertical focusing during first turns 250 AKeV/turn HIAT 2009, 9th June , Venice

  7. MAGNETIC FIELD PROPERTIES HIAT 2009, 9th June , Venice

  8. ISOCHRONIZATION LEVEL UNTIL THE PHASE VARIES WITHIN 20 DEG, THE MAGNETIC FIELD HAS TO MATCH THE ISOCHRONOUS ONE WITH A PRECISION OF ±5GAUSS (|ΔB/B|<10-4) HIAT 2009, 9th June , Venice

  9. RF CAVITY DESIGN Emax= 15 MV/m fRF = 98 MHz, 4 th harmonic 50 kW power losses estimated HIAT 2009, 9th June , Venice

  10. BEAM DYNAMIC STUDY structural resonance coupling resonance HIAT 2009, 9th June , Venice

  11. WHAT APPENDS AT RESONANCE ZONE? Minimal transverse stability plot Solution? Jump these radii… but energy gain cannot increase too much HIAT 2009, 9th June , Venice

  12. Radial beam envelop in two cases old magnetic design Qr Qr cm cm energy energy HIAT 2009, 9th June , Venice

  13. AUTOELLIPSE TRANSPORT 950 970 990 930 1000 960 940 980 PR 920 1010 910 1020 900 1030 Number of turns 1040 R Ar=0.2 Ar=0.1 HIAT 2009, 9th June , Venice

  14. VERTICAL BEAM DYNAMIC Vertical beam envelop Axial space phase HIAT 2009, 9th June , Venice

  15. Trimming C12 to H2+: RF and MF change Bo=cost. RF Frequency scales 0,7 % Two beams mean two different operating RF frequencies small variation of the MF gauss Best solution: coils split into two parts (C400) HIAT 2009, 9th June , Venice

  16. 2nd way: change only the magnetic field fRF = cost Magnetic field difference between C12 and H2+ is larger, but RF freq. is kept constant (it needs only the fine tuning) gauss HIAT 2009, 9th June , Venice

  17. Trimming by two correction coils HIAT 2009, 9th June , Venice

  18. GOOD M. FIELD MATCHING MINIMIZING POWER LOSSES CC 1 CC VALLEY Less than 4 KW/COIL MAIN COIL HIAT 2009, 9th June , Venice

  19. MAIN SETTING TO CHANGE BEAM PHASE SLIP CALCULATED BY EO MAGNETIC FIELD MATCHING 12C6+ H2+ extraction MAIN COIL : 4586 A/cm2 4586+53.7 A/cm2 CC 1: 104.47 A/cm2  8X8 cm2 , Rint=171 cm, Hmin=81 cm >> 1.32 kW/coil CC VAL: 395.1 A/cm2  5X4 cm2 , Rint=106 cm, Hmin=69 cm >> 3.24 KW/coil RF SETTING: nu0=24.18717 MHz 24.18587 MHz Δf: 1,3 KHz TRIMMER RANGE TUNING (~ 6 KHz) HIAT 2009, 9th June , Venice

  20. EXTRACTION LAYOUT VED1,2 = 50kV Emax = 120kV/cm 4 PASSIVE MCs ε~ 60 % protons REXT =122 cm 260 AMeV 1 single turn 4 PASSIVE MCs ε~ 100 % Carbon ions HIAT 2009, 9th June , Venice

  21. BEAM DYNAMIC AT EXTRACTION HIAT 2009, 9th June , Venice

  22. CURRENT BEAM ESTIMATION Carbon ions by EDs Protons by stripper HIAT 2009, 9th June , Venice

  23. CONCLUSION The final design of SCENT300 was completed and no other study is expected: the technical drawings of the iron steel are also accomplished out. HIAT 2009, 9th June , Venice

  24. GRAZIE ! HIAT 2009, 9th June , Venice

  25. Coils parameters Conservative Design HIAT 2009, 9th June , Venice

  26. FORCES EVALUATION ON THE COILS (J X B) Vertical force (N) TOT=-891 tons/coil 3 4 5 2 6 1 12 7 11 8 10 9 Radial force (N) Average=166 tons/coil HIAT 2009, 9th June , Venice

  27. STRESS DISTRIBUTION IN THE COILS HOOP STRESS TENSILE STRESS RADIAL STRESS HIAT 2009, 9th June , Venice

  28. HIAT 2009, 9th June , Venice

  29. Summary HIAT 2009, 9th June , Venice

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