Novel race track microtron end magnets

Novikov, G.A.; Chubarov, O.V.; Halbach, K.; Karev, A.; Shvedunov, V.I.; Trower, W.P.

doi:10.1016/s0168-583x(97)00947-6

Cited by 13 publications

(7 citation statements)

References 4 publications

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“…Different situation takes place with medium and high energy linear electron accelerators for external radiation therapy (18)(19)(20)(21)(22)(23)(24)(25). Currently, the vast majority of such accelerators are manufactured by Varian Medical Systems [8] and Elekta [9].…”

Section: Introductionmentioning

confidence: 99%

Electron Accelerator for Radiation Therapy with Beam Energy 6-20 MeV

Ovchinnikova¹,

Shvedunov²

2020

Preprint

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Purpose: To describe a concept of a compact electron accelerator for external radiation therapy with variable energy in the range of 6 -20 MeV, based on linotron principle.Methods: Beam dynamics simulation using the CST and MAD-X code. Various optimization methods of multiparameter problem.Results: Our accelerator differs from the Reflexotron in a number of essential details: a much more compact and more efficient C-band accelerating structure, optimized for the high capture efficiency, narrow energy and phase spectra, and low transverse emittance; magnetic mirror with fixed field based on rare-earth permanent magnets; three-electrode electron gun with off-axis placement of the cathode with a current regulated in the range of two orders of magnitude. These improvements allow the possibility to: adjust the accelerated beam current in a wide range in accordance with the required energy; reduce parasitic losses of the beam current and the associated parasitic radiation; eliminate the risk of setting an erroneous energy value; significantly reduce the dimensions of the accelerator and simplify its operation. Conclusions:We presented the results of calculation of the electron accelerator for external radiation therapy in the energy range of 6 -20 MeV. The accelerator is based on the principle of double beam acceleration in the same accelerating structure, which allows to control the beam energy in a wide range, reduce RF power consumption and the dimensions of the accelerator, and, therefore, reduce its cost. The results can be used to develop the design of the accelerator on the platform of the KLT-6 complex created by ROSATOM.

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Section: Introductionmentioning

confidence: 99%

Electron Accelerator for Radiation Therapy with Beam Energy 6-20 MeV

Ovchinnikova¹,

Shvedunov²

2020

Preprint

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“…We have designed, built, and tuned two novel end magnets for our RTM using REPM materials to provide ~0.96T main fields uniform to 0.3% in the 500×250×20 mm 3 working region which give the required 1 st orbit displacement and focusing.…”

Section: Resultsmentioning

confidence: 99%

“…We had built two 790×460×420 mm 3 magnets, SN01 and SN02, that each weigh 1,200 kg. We mapped the fields using a Hall probe, accurate to 0.05%, with the MFC providing the maximum magnetic flux, and found 0.963 (SN01) and 0.958 T (SN02), or ~4% less than the required 1.0 T design value.…”

Section: Tuned Fieldsmentioning

confidence: 99%

“…We leveled the reverse fields by sliding the 30×8×3 mm 3 magnetized RFC blocks in their channels. We also inserted steel shims to decrease the field levels.…”

Section: Tuned Fieldsmentioning

confidence: 99%

“…Our compact mobile 70 MeV RTM [1] requires large volume, high precision, highly reliable REPM bending magnets [2,3] without power supplies and cooling coils and a simple control system. Figure 1 shows our 'box' bending magnet with field clamp.…”

Section: Introductionmentioning

confidence: 99%

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Large permanent magnet dipole performance

Novikov

Pakhomov²,

Shvedunov³

et al.

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268)

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We designed, built, tuned, and installed in our RaceTrack Microtron (RTM) a pair of Sm 2 Co 17 Rare-Earth Permanent Magnet (REPM) dipoles that provide a ~0.96T field uniform to 0.3% in the 500×250×20 mm 3 working region. By accelerating electrons through all 14 orbits to 67.5 MeV, we have negotiated the difficult 1 st orbit beam passage with its critical focusing and orbit displacement requirements, thus proving our magnet system design.

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Large quasi-sheet dipole magnets

Skachkov¹,

Novikov²

2004

Nuclear Instruments and Methods in Physics Research Section A:

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Novel race track microtron end magnets

Cited by 13 publications

References 4 publications

Electron Accelerator for Radiation Therapy with Beam Energy 6-20 MeV

Electron Accelerator for Radiation Therapy with Beam Energy 6-20 MeV

Large permanent magnet dipole performance

Large quasi-sheet dipole magnets

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