Design and test of a curved superconducting dipole magnet for proton therapy

Brouwer, Lucas; Caspi, S.; Edwards, Kevin A.; Godeke, A.; Hafalia, R.; Hodgkinson, A.; Huggins, Anthony; Myers, C.; Myers, Scott A.; Schillo, Michael; Taylor, J. D.; Turqueti, Marcos; Wang, X.; Wan, Weishi; Prestemon, S.

doi:10.1016/j.nima.2020.163414

Cited by 28 publications

(10 citation statements)

References 10 publications

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“…The observed decay curves are qualitatively very similar to those reported in [40,41]. However, while the authors of [40] attribute the quench-back to the direct heating of the conductor by interfilament coupling losses, our interpretation agrees with that of [42], i.e.…”

Section: Test Resultssupporting

confidence: 90%

Training-free performance of the wax-impregnated SuShi septum magnet

Barna,

Brunner,

Novák

et al. 2024

Supercond. Sci. Technol.

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In the framework of the Future Circular Collider Study a new septum magnet concept, nicknamed ``SuShi'' has been developed, and a prototype was built at Wigner RCP, and tested at the FREIA facility of Uppsala University. The concept uses a canted cosine theta (CCT)-like superconducting magnet and a passive superconducting shield to create a zero-field and high-field region within its aperture. SuShi is the first CCT magnet with both of its winding layers simultaneously impregnated with wax. This paper describes the first powering test of the empty magnet at 4.2 K, without the shield being inserted in its aperture. The performance of the magnet, including the observation of quench-back, estimation of hot-spot temperatures and the fraction of energy dissipated in the formers are presented, and most interestingly the absence of any quench during the entire testing period is reported. Sushi reached its nominal peak field of 3.64 T at 450 A, which corresponds to 76% of the calculated short sample limit along the load line, without training.

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Section: Test Resultssupporting

confidence: 90%

Training-free performance of the wax-impregnated SuShi septum magnet

Barna,

Brunner,

Novák

et al. 2024

Supercond. Sci. Technol.

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“…The coil geometry produces pure dipole fields whilst cancelling unwanted solenoidal fields [24]; higher order multipoles can be adjusted by modifying the coil windings. Other single-pass optics studies [25,26] have presented curved, alternating gradient (AG)-CCT configurations, consisting of focusing-defocusing quadrupole layers inside CCT dipoles; [25] reports a momentum acceptance of ±25%. Similarly, an AG-CCT arrangement could achieve strong focusing in TURBO to transport a wide range of rigidities without magnet ramping during treatment.…”

Section: Turbo Concept For Heavy Ionsmentioning

confidence: 99%

TURBO: A novel beam delivery system enabling rapid depth scanning for charged particle therapy

Yap

Sheehy

Steinberg

et al. 2023

J. Phys.: Conf. Ser.

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Charged particle therapy (CPT) is a well-established modality of cancer treatment and is increasing in worldwide presence due to improved accelerator technology and modern techniques. The beam delivery system (BDS) determines the overall timing and beam shaping capabilities, but is restricted by the energy variation speed: energy layer switching time (ELST). Existing treatment beamlines have a ±1% momentum acceptance range, needing time to change the magnetic fields as the beam is delivered in layers at various depths across the tumour volume. Minimising the ELST can enable the delivery of faster, more effective and advanced treatments but requires an improved BDS. A possibility for this could be achieved with a design using Fixed Field Alternating Gradient (FFA) optics, enabling a large energy acceptance to rapidly transport beams of varying energies. A scaled-down, novel system – Technology for Ultra Rapid Beam Operation (TURBO) – is being developed at the University of Melbourne, to explore the potential of rapid depth scanning. Initial simulation studies, beam and field measurements, project plans and clinical considerations are discussed.

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“…Another challenge is the ramp rate ranging from 0.3 T/s for the gantry to 1 T/s for the synchrotron. Finally, the most critical challenge is that the magnet must be curved [14] with a very small bending radius, dictated by the 430 MeV/nucleon of the fully stripped carbon ions which have a beam rigidity: Bρ = 6.6 Tm. Therefore, the bending radius ranges from 1.3 m to 1.6 m according to the field level that will be chosen.…”

Section: ) Objectives Of Hitriplus Wp8mentioning

confidence: 99%

A European Collaboration to Investigate Superconducting Magnets for Next Generation Heavy Ion Therapy

Rossi¹,

Ballarino

Barna

et al. 2022

IEEE Trans. Appl. Supercond.

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Next generation ion therapy magnets both for gantry and for accelerator (synchrotron) are under investigation in a recently launched European collaboration that, in the frame of the European H2020 HITRIplus and I.FAST programmes, has obtained some funding for work packages on superconducting magnets. Design and technology of superconducting magnets will be developed for ion therapy synchrotron and -especially-gantry, taking as reference beams of 430 MeV/nucleon ions (C-ions) with 10 10 ions/pulse. The magnets are about 60-90 mm diameter, 4 to 5 T peak field with a field change of about 0.3 T/s and good field quality. The paper will illustrate the organization of the collaboration and the technical program. Various superconductor options (LTS, MgB2 or HTS) and different magnet shapes, like classical CosTheta or innovative Canted CosTheta (CCT), with curved multifunction (dipole and quadrupole), are under evaluation, CCT being the baseline. These studies should provide design inputs for a new superconducting gantry design for existing facilities and, on a longer time scale, for a brand-new hadron therapy centre to be placed in the South East Europe (SEEIIST project).

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Design and test of a curved superconducting dipole magnet for proton therapy

Cited by 28 publications

References 10 publications

Training-free performance of the wax-impregnated SuShi septum magnet

Training-free performance of the wax-impregnated SuShi septum magnet

TURBO: A novel beam delivery system enabling rapid depth scanning for charged particle therapy

A European Collaboration to Investigate Superconducting Magnets for Next Generation Heavy Ion Therapy

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