Superconducting 250 MeV Proton Cyclotron for Cancer Treatment

Geisler, A.; Baumgarten, C.; Hobl, A.; Klein, U.; Krischel, D.; Schillo, Michael; Timmer, Jan

doi:10.1109/tasc.2005.849591

Cited by 9 publications

(9 citation statements)

References 1 publication

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“…The advantage of the method implemented in MinT is that it allows to compare the simulation results with beam profile measurements, and hence to validate the used model. The compact isochronous cyclotron "COMET" provides a continuous wave (CW) beam of 250 MeV with currents of up to 800 nA [21][22][23][24][25][26][27][28]. The beam energy is adjusted by means of a double-wedge-degrader made from highdensity graphite, followed by a beam collimation system and the energy selection system (ESS).…”

Section: The 870 Kev-beamlinementioning

confidence: 99%

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MinT: A Fast Lightweight Envelope/Monte-Carlo Beam Optics Code for the Proton Beamlines of the Paul Scherrer Institute

Baumgarten¹

2022

Preprint

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We report about the methods used in, and the performance of, the new fast and light-weight linear beam transport program MinT. MinT provides, beyond the usual linear ion optics, methods to compute the effects of beam degradation, multiple scattering and beam collimation. This is specifically important in facilities where the ion beam passes matter, for instance in proton therapy beamlines with an energy degrader as in the Proscan facility at PSI, but also for modeling the beam traversing the Muon-and Pion-production targets of the Paul Scherrer Institut's high intensity proton accelerator (HIPA). MinT is intended to be useful as a support tool for the HIPA and Proscan control rooms. This requires to have useful results within a few seconds. Hence simplicity and speed of calculation is favored against higher accuracy.MinT has been designed not only to replace the FORTRAN 77 codes TRANSPORT and TUR-TLE, but to combine and extent their capabilities. MinT is a byte-code-compiler which translates an input language, described by syntactic rules. This allows for control structures like "if-then-else" or "while"-loops, thus providing a high flexibility and readability.

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Section: The 870 Kev-beamlinementioning

confidence: 99%

“…The Proscan therapy (PT) facility is driven by a 250 MeV superconducting compact cyclotron "COMET" with currents of (usually) up to 1 µA [21][22][23][24][25][26][27][28][29]. After extraction from COMET, the 250 MeV beam passes a double-wedge degrader which is used to reduce the beam energy to 74 − 230 MeV.…”

Section: Introductionmentioning

confidence: 99%

MinT: A Fast Lightweight Envelope/Monte-Carlo Beam Optics Code for the Proton Beamlines of the Paul Scherrer Institute

Baumgarten¹

2022

Preprint

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“…Among many accelerator schemes applied or proposed for proton therapy such as a linac injector plus a slow-cycling synchrotron [8,9], a conventional compact cyclotron [10], a superconducting cyclotron [11], a high RF frequency linac with a cyclotron injector [12], a rapid cycling synchrotron with a tandem or linac injector [13] and FFAG series [14,15], only the first two have long-time medical treatment experience. The accelerator scheme for the APTF should meet the following constraints: technically mature without requiring long time development, relatively lower investment, compatible to all the major irradiation methods as mentioned above, technically applicable to carbon therapy in the future.…”

Section: Design Philosophymentioning

confidence: 99%

ATPF – a dedicated proton therapy facility

Fang¹,

Guan²,

Tang³

et al. 2010

Chinese Phys. C

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A proton therapy facility based on a linac injector and a slow-cycling synchrotron is proposed. To obtain good treatments for different cancer types, both the spot scanning method and the double-scattering method are adopted in the facility, whereas the nozzles include both gantry and fixed beam types. The proton accelerator chain includes a synchrotron of 250 MeV in maximum energy, an injector of 7 MeV consisting of an RFQ and a DTL linac, with a repetition rate of 0.5 Hz. The slow extraction using the third-order resonance and together with the RFKO method is considered to be a good method to obtain a stable and more-or-less homogenous beam spill. To benefit the spot scanning method, the extraction energy can be as many as about 200 between 60 MeV and 230 MeV. A new method - the emittance balancing technique of using a solenoid or a quadrupole rotator is proposed to solve the problem of unequal emittance in the two transverse planes with a beam slowly extracted from a synchrotron. The facility has been designed to keep the potential to be upgraded to include the carbon therapy in the future.

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“…The ba sic pa ram e ters of these com po nents de ter mine not only the dis tri bution of a mag netic field but also the qual ity of the beam in side the cy clo tron. Due to the fact that the beam moves in the prox im ity of the me dian plane of a cy clotron, the ax ial mag netic field in the me dian plane is par tic u larly vi tal, which af fects the phase slip and work di a gram (namely the trans verse be ta tron os cil lation fre quen cies Q r , Q z ) [5][6][7][8][9][10][11]. Fur ther more, it has been es tab lished that the az i muthal width and spi ral an gle of sec tors, the gap dis tance be tween the up per and the lower sec tors, the depth of the val ley re gion, the ax ial po si tion and shape of super con duct ing coils and the coil cur rent can af fect the dis tri bu tion of ax ial mag netic field on me dian plane.…”

Section: Introductionmentioning

confidence: 99%

Research on the effect of magnet parameters on the isochronous field of a superconducting cyclotron

Zhou

Ding

et al. 2019

NUCL TECH RAD PROT

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It is a com pli cated task to ob tain an isochronous field of a cy clo tron mag net. Due to non-linear prop erty of iron, it er ated sim u la tion of mag net de sign takes a long time to get an isochronous field. As an ex am ple, for a mag net de sign of a 240 MeV (SC240) super con ducting cy clo tron, the ef fect of main pa ram e ters of a mag net sys tem on the mag netic field was stud ied, among them the az i muthal sec tor width, the spi ral sec tor an gle, the gap be tween sectors, the depth of val ley re gion, the po si tion of the coil, the shape of the coil and the ex cited cur rent of the super con duct ing coil. It was found that the az i muthal av er age mag netic field can be in creased by any of the fol low ing meth ods, in clud ing en larg ing az i muthal width, increas ing ex cited cur rent of the super con duct ing coil, nar row ing of the gap be tween sec tors, re duc ing the depth of the val ley re gion or de creas ing the dis tance be tween the coil and the mid-plane. In ad di tion, ax ial os cil la tion fre quency can be im proved by in creas ing the spi ral an gle, the depth of the val ley re gion, or de creas ing the gap be tween sec tors.

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Superconducting 250 MeV Proton Cyclotron for Cancer Treatment

Cited by 9 publications

References 1 publication

MinT: A Fast Lightweight Envelope/Monte-Carlo Beam Optics Code for the Proton Beamlines of the Paul Scherrer Institute

MinT: A Fast Lightweight Envelope/Monte-Carlo Beam Optics Code for the Proton Beamlines of the Paul Scherrer Institute

ATPF – a dedicated proton therapy facility

Research on the effect of magnet parameters on the isochronous field of a superconducting cyclotron

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