Design study of compact medical fixed-field alternating-gradient accelerators

Misu, T.; Iwata, Y.; Sugiura, Akinori; Hojo, Satoru; Miyahara, Nobuyuki; Kanazawa, M.; Murakami, Takeshi; Yamada, S.

doi:10.1103/physrevstab.7.094701

Cited by 16 publications

(12 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, the idea of using the second stability region with phase advance greater than 180 per cell was mentioned in the 1950s by Kolomensky [11] and more recently by Misu, et al, [12]. These authors concluded that the design was not feasible from a practical point of view because of alignment tolerance and beam size.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Scaling Fixed-Field Alternating Gradient Accelerators with a Small Orbit Excursion

Machida

2009

Phys. Rev. Lett.

View full text Add to dashboard Cite

A novel scaling type of fixed-field alternating gradient (FFAG) accelerator is proposed that solves the major problems of conventional scaling and nonscaling types. This scaling FFAG accelerator can achieve a much smaller orbit excursion by taking a larger field index k. A triplet focusing structure makes it possible to set the operating point in the second stability region of Hill's equation with a reasonable sensitivity to various errors. The orbit excursion is about 5 times smaller than in a conventional scaling FFAG accelerator and the beam size growth due to typical errors is at most 10%.

show abstract

mentioning

confidence: 99%

“…In earlier studies using these, efforts were made to reduce the circumference factor, defined as the ratio of the average machine radius to the bending radius. The attempts were abandoned, however, because the tolerance on the field index was worse by about a factor 10 to 100 [11] and very sensitive to imperfections [12].…”

mentioning

confidence: 99%

Scaling Fixed-Field Alternating Gradient Accelerators with a Small Orbit Excursion

Machida

2009

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…Whilst scaling FFAGs give a pulse rate advantage over synchrotrons for particle therapy [87,88], their magnets are still larger than ideal. Non-scaling designs dispense with the requirement for constant tune which allows smaller magnets.…”

Section: Ffagsmentioning

confidence: 99%

Hadron accelerators for radiotherapy

Owen

Mackay

Peach

et al. 2014

Contemporary Physics

View full text Add to dashboard Cite

Over the last twenty years the treatment of cancer with protons and light nuclei such as carbon ions has moved from being the preserve of research laboratories into widespread clinical use. A number of choices now exist for the creation and delivery of these particles, key amongst these being the adoption of pencil beam scanning using a rotating gantry; attention is now being given to what technologies will enable cheaper and more effective treatment in the future. In this article the physics and engineering used in these hadron therapy facilities is presented, and the research areas likely to lead to substantive improvements. The wider use of superconducting magnets is an emerging trend, whilst further ahead novel high-gradient acceleration techniques may enable much smaller treatment systems. Imaging techniques to improve the accuracy of treatment plans must also be developed hand-in-hand with future sources of particles, a notable example of which is proton computed tomography.

show abstract

“…A design study on three-concentric-radial-sector S-FFAGs for carbon ion cancer therapy, as a possibility for the Chiba Medical facility, was presented in 2004 [14]. The low energy five-radial-sector FFAG ring would start with a 40 keV/u ECR (electron cyclotron resonance) ion source and accelerate to 6 MeV/u.…”

Section: Chiba 12-radial-sector 3-concentric S-ffag Designmentioning

confidence: 99%

FFAGs as Accelerators and Beam Delivery Devices for Ion Cancer Therapy

Trbojević

2009

Rev. Accl. Sci. Tech.

View full text Add to dashboard Cite

First, a review is given of fixed field alternating gradient (FFAG) accelerators, presenting a bit of their history and basic concepts. Special attention is paid to the concept of scaling (S-FFAG) and nonscaling (NS-FFAG) FFAGs. This notation is used only in the NS-FFAG part of the article. A discussion is then provided on operating FFAGs. A presentation is made of the designs being considered for S-FFAGs. A bit more is said about the concept of the NS-FFAG and a resonance crossing problem resulting from designs of the NS-FFAGs. A beam delivery system (gantry) employing the NS-FFAG concept is presented after that and, finally, future plans and R&D requirements are put forward.

show abstract

Design study of compact medical fixed-field alternating-gradient accelerators

Cited by 16 publications

References 6 publications

Scaling Fixed-Field Alternating Gradient Accelerators with a Small Orbit Excursion

Scaling Fixed-Field Alternating Gradient Accelerators with a Small Orbit Excursion

Hadron accelerators for radiotherapy

FFAGs as Accelerators and Beam Delivery Devices for Ion Cancer Therapy

Contact Info

Product

Resources

About