Conceptual Design of a 5 T 200 mm 1 T/s Ramping NbTi Synchrotron Magnet for Cancer Treatment

Park, Jeong Hwan; Hahn, Garam; Bong, Uijong; Kwon, Soun Pil; Lee, Hyunjung; Cho, Mincheol; Kim, Jaemin; Chu, Yong; Jung, Moon Youn; Han, Ki Jin; Hahn, Seungyong

doi:10.1109/tasc.2019.2906641

Cited by 2 publications

(1 citation statement)

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“…[19,20] show that NbTi strands at 4.2 K have a critical current of 1950 A=mm 2 . For NbTi cable with a copper-to-superconductor ratio of 1.5∶1, critical current is approximately 800 A=mm 2 [21,22]. Hence, our 90°magnet whose current density is 559 A=mm 2 can be operated with ∼30% critical current margin.…”

Section: Field Analysismentioning

confidence: 97%

Design of a compact gantry for carbon-ion beam therapy

Kim

Yoon

2019

Phys. Rev. Accel. Beams

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This paper presents the design of a compact gantry that uses superconducting bending magnets (BMs), for use in carbon-ion beam therapy. The size of the gantry is comparable to those of existing gantries that are used for proton-beam therapy. The designed gantry provides point-to-parallel scanning over an area of 20 cm × 20 cm at the isocenter, and has rotationally invariant optics, which are enabled by quadrupole and dipole magnets together with a 90°combined-function magnet with 18.6-cm bore radius. A 90°BM accommodates large scanning angles; it also provides equal focusing in horizontal and vertical planes, and zero-integrated nonlinear fields to minimize beam distortion at the isocenter. Three-dimensional field analysis of the magnet, and particle-tracking simulation, validate the beam optics of the gantry and point-toparallel scanning. The Taylor map and the Lie map are shown to be useful in the analysis of magnetic fields and in optimizing the coil windings.

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Section: Field Analysismentioning

confidence: 97%