Keyword: hadrontherapy
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MOPML061 Hadron Therapy Machine Simulations Using BDSIM simulation, hadron, lattice, proton 546
 
  • W. Shields
    JAI, Egham, Surrey, United Kingdom
  • S.T. Boogert, L.J. Nevay
    Royal Holloway, University of London, Surrey, United Kingdom
  • J. Snuverink
    PSI, Villigen PSI, Switzerland
  
  Min­imis­ing the back­ground ra­di­a­tion dose in hadron ther­apy from par­ti­cle losses and sec­ondary emis­sions is of the high­est im­por­tance for pa­tient pro­tec­tion. To achieve this, track­ing par­ti­cles from source to the pa­tient de­liv­ery re­gion in a sin­gle sim­u­la­tion pro­vides a quan­ti­ta­tive de­scrip­tion that dis­tin­guishes the back­ground ra­di­a­tion from the treat­ment dose ar­riv­ing at the gantry's isocen­tre. We demon­strate the abil­ity to sim­u­late beam trans­port, par­ti­cle loss stud­ies, and back­ground ra­di­a­tion track­ing in an ex­am­ple hadron ther­apy ma­chine using BDSIM, a Geant4 based Monte Carlo sim­u­la­tion code for track­ing high en­ergy par­ti­cles within a par­ti­cle ac­cel­er­a­tor and its sur­round­ing en­vi­ron­ment. Ma­chine op­tics ver­i­fi­ca­tion is also demon­strated through com­par­i­son to ex­ist­ing ac­cel­er­a­tor track­ing codes.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-MOPML061  
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TUPAF010 Empty Sweeping Bucket for Slow Extraction extraction, resonance, acceleration, synchrotron 676
 
  • L. Falbo, E. Bressi, C. Priano
    CNAO Foundation, Milan, Italy
  
  The ex­trac­tion process from a syn­chro­tron is one of the most im­por­tant as­pects of an ac­cel­er­a­tor de­voted to clin­i­cal pur­poses, like the hadron­ther­apy in which hadron beams are used to treat tu­mors. In­deed the qual­ity of the dose de­liv­ered to the pa­tient, in terms of dose uni­for­mity and pre­ci­sion in the beam char­ac­ter­is­tics, is de­fined by the way in which the beam is ex­tracted. The qual­ity of the ex­tracted beam (the so called spill) is strongly af­fected by the sta­bil­ity of the power sup­plies of the syn­chro­tron mag­nets whose field sta­bil­ity cre­ates a rip­ple in the in­ten­sity of the ex­tracted beam it­self. When it is not pos­si­ble to im­prove the power sup­ply sta­bil­ity, it is needed to apply some ad­di­tional tech­niques in order to cure the spill rip­ple. At CNAO, the ital­ian hadron­ther­apy fa­cil­ity, it has been thought to im­prove the Empty Bucket Chan­nelling tech­nique by using an en­ergy-mov­ing bucket in­stead of a sta­tion­ary bucket. The paper shows the im­ple­men­ta­tion, the ad­van­tages and the ef­fi­cacy of this RF gym­nas­tic, named 'Empty Sweep­ing Bucket'.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUPAF010  
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