Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries

Wan, Weishi; Brouwer, Lucas; Caspi, Shlomo; Prestemon, Soren; Gerbershagen, Alexander; Schippers, Jacobus Maarten; Robin, David

doi:10.1103/PhysRevSTAB.18.103501

Title: Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries

Abstract

We present a design of superconducting magnets, optimized for application in a gantry for proton therapy. We have introduced a new magnet design concept, called an alternating-gradient canted cosine theta (AG-CCT) concept, which is compatible with an achromatic layout. This layout allows a large momentum acceptance. The 15 cm radius of the bore aperture enables the application of pencil beam scanning in front of the SC-magnet. The optical and dynamic performance of a gantry based on these magnets has been analyzed using the fields derived (via Biot-Savart law) from the actual windings of the AG-CCT combined with the full equations of motion. The results show that with appropriate higher order correction, a large 3D volume can be rapidly scanned with little beam shape distortion. A very big advantage is that all this can be done while keeping the AG-CCT fields fixed. This reduces the need for fast field ramping of the superconducting magnets between the successive beam energies used for the scanning in depth and it is important for medical application since this reduces the technical risk (e.g., a quench) associated with fast field changes in superconducting magnets. For proton gantries the corresponding superconducting magnet system holds promise of dramaticmore »« less

Authors:: Wan, Weishi; Brouwer, Lucas; Caspi, Shlomo; Prestemon, Soren; Gerbershagen, Alexander; Schippers, Jacobus Maarten; Robin, David

Publication Date:: Fri Oct 23 00:00:00 EDT 2015

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1224659

Alternate Identifier(s):: OSTI ID: 1378603

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Published Article

Journal Name:: Physical Review Special Topics. Accelerators and Beams

Additional Journal Information:: Journal Name: Physical Review Special Topics. Accelerators and Beams Journal Volume: 18 Journal Issue: 10; Journal ID: ISSN 1098-4402

Publisher:: American Physical Society

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 42 ENGINEERING

Citation Formats


                    Wan, Weishi, Brouwer, Lucas, Caspi, Shlomo, Prestemon, Soren, Gerbershagen, Alexander, Schippers, Jacobus Maarten, and Robin, David. Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevSTAB.18.103501.

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                    Wan, Weishi, Brouwer, Lucas, Caspi, Shlomo, Prestemon, Soren, Gerbershagen, Alexander, Schippers, Jacobus Maarten, & Robin, David. Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries.  United States.  https://doi.org/10.1103/PhysRevSTAB.18.103501

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                    Wan, Weishi, Brouwer, Lucas, Caspi, Shlomo, Prestemon, Soren, Gerbershagen, Alexander, Schippers, Jacobus Maarten, and Robin, David. Fri .  
"Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries".  United States.  https://doi.org/10.1103/PhysRevSTAB.18.103501.

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@article{osti_1224659,

  title        = {Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries},

  author       = {Wan, Weishi and Brouwer, Lucas and Caspi, Shlomo and Prestemon, Soren and Gerbershagen, Alexander and Schippers, Jacobus Maarten and Robin, David},

  abstractNote = {We present a design of superconducting magnets, optimized for application in a gantry for proton therapy. We have introduced a new magnet design concept, called an alternating-gradient canted cosine theta (AG-CCT) concept, which is compatible with an achromatic layout. This layout allows a large momentum acceptance. The 15 cm radius of the bore aperture enables the application of pencil beam scanning in front of the SC-magnet. The optical and dynamic performance of a gantry based on these magnets has been analyzed using the fields derived (via Biot-Savart law) from the actual windings of the AG-CCT combined with the full equations of motion. The results show that with appropriate higher order correction, a large 3D volume can be rapidly scanned with little beam shape distortion. A very big advantage is that all this can be done while keeping the AG-CCT fields fixed. This reduces the need for fast field ramping of the superconducting magnets between the successive beam energies used for the scanning in depth and it is important for medical application since this reduces the technical risk (e.g., a quench) associated with fast field changes in superconducting magnets. For proton gantries the corresponding superconducting magnet system holds promise of dramatic reduction in weight. For heavier ion gantries there may furthermore be a significant reduction in size.},

  doi          = {10.1103/PhysRevSTAB.18.103501},

  journal      = {Physical Review Special Topics. Accelerators and Beams},

  number       = 10,

  volume       = 18,

  place        = {United States},

  year         = {Fri Oct 23 00:00:00 EDT 2015},

  month        = {Fri Oct 23 00:00:00 EDT 2015}

}

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Works referenced in this record:

New concepts in transverse field magnet design
journal, June 2003

Gavrilin, A. V.; Bird, M. D.; Keilin, V. E.
IEEE Transactions on Appiled Superconductivity, Vol. 13, Issue 2
DOI: 10.1109/TASC.2003.812636

The 200-MeV proton therapy project at the Paul Scherrer Institute: Conceptual design and practical realization
journal, January 1995

Pedroni, Eros; Bacher, Reinhard; Blattmann, Hans
Medical Physics, Vol. 22, Issue 1
DOI: 10.1118/1.597522

Design of a superconducting rotating gantry for heavy-ion therapy
journal, April 2012

Iwata, Y.; Noda, K.; Shirai, T.
Physical Review Special Topics - Accelerators and Beams, Vol. 15, Issue 4
DOI: 10.1103/PhysRevSTAB.15.044701

Carbon/proton therapy: A novel gantry design
journal, May 2007

Trbojevic, D.; Parker, B.; Keil, E.
Physical Review Special Topics - Accelerators and Beams, Vol. 10, Issue 5
DOI: 10.1103/PhysRevSTAB.10.053503

Modulated double-helix quadrupole magnets
journal, June 2003

Meinke, R. B.; Goodzeit, C. L.; Ball, M. J.
IEEE Transactions on Appiled Superconductivity, Vol. 13, Issue 2, p. 1369-1372
DOI: 10.1109/TASC.2003.812674

Canted–Cosine–Theta Magnet (CCT)—A Concept for High Field Accelerator Magnets
journal, June 2014

Caspi, S.; Borgnolutti, F.; Brouwer, L.
IEEE Transactions on Applied Superconductivity, Vol. 24, Issue 3
DOI: 10.1109/TASC.2013.2284722

Structural Design and Analysis of Canted–Cosine–Theta Dipoles
journal, June 2014

Brouwer, L.; Arbelaez, D.; Caspi, S.
IEEE Transactions on Applied Superconductivity, Vol. 24, Issue 3
DOI: 10.1109/TASC.2013.2284425

Superconducting toroidal combined-function magnet for a compact ion beam cancer therapy gantry
journal, December 2011

Robin, D. S.; Arbelaez, D.; Caspi, S.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 659, Issue 1
DOI: 10.1016/j.nima.2011.08.049

Recent progress of HIMAC for sophisticated heavy-ion cancer radiotherapy
journal, July 2014

Noda, K.; Furukawa, T.; Fujimoto, T.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 331
DOI: 10.1016/j.nimb.2013.12.036

A new configuration for a dipole magnet for use in high energy physics applications
journal, April 1970

Meyer, D. I.; Flasck, R.
Nuclear Instruments and Methods, Vol. 80, Issue 2
DOI: 10.1016/0029-554X(70)90784-6

A superconducting magnet mandrel with minimum symmetry laminations for proton therapy
journal, August 2013

Caspi, S.; Arbelaez, D.; Brouwer, L.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 719
DOI: 10.1016/j.nima.2013.04.021

A design of a compact gantry for proton therapy with 2D-scanning
journal, May 1999

Vrenken, H.; Schuitema, R.; Dermois, O. C.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 426, Issue 2-3
DOI: 10.1016/S0168-9002(99)00039-X

The PSI Gantry 2: a second generation proton scanning gantry
journal, January 2004

Pedroni, Eros; Bearpark, Ralph; Böhringer, Terence
Zeitschrift für Medizinische Physik, Vol. 14, Issue 1
DOI: 10.1078/0939-3889-00194

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Similar Records

Title: Alternating-gradient canted cosine theta superconducting magnets for future compact proton gantries

Abstract

Citation Formats

New concepts in transverse field magnet design journal, June 2003

The 200-MeV proton therapy project at the Paul Scherrer Institute: Conceptual design and practical realization journal, January 1995

Design of a superconducting rotating gantry for heavy-ion therapy journal, April 2012

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Superconducting toroidal combined-function magnet for a compact ion beam cancer therapy gantry journal, December 2011

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A new configuration for a dipole magnet for use in high energy physics applications journal, April 1970

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A design of a compact gantry for proton therapy with 2D-scanning journal, May 1999

The PSI Gantry 2: a second generation proton scanning gantry journal, January 2004

New concepts in transverse field magnet design
journal, June 2003

The 200-MeV proton therapy project at the Paul Scherrer Institute: Conceptual design and practical realization
journal, January 1995

Design of a superconducting rotating gantry for heavy-ion therapy
journal, April 2012

Carbon/proton therapy: A novel gantry design
journal, May 2007

Modulated double-helix quadrupole magnets
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Canted–Cosine–Theta Magnet (CCT)—A Concept for High Field Accelerator Magnets
journal, June 2014

Structural Design and Analysis of Canted–Cosine–Theta Dipoles
journal, June 2014

Superconducting toroidal combined-function magnet for a compact ion beam cancer therapy gantry
journal, December 2011

Recent progress of HIMAC for sophisticated heavy-ion cancer radiotherapy
journal, July 2014

A new configuration for a dipole magnet for use in high energy physics applications
journal, April 1970

A superconducting magnet mandrel with minimum symmetry laminations for proton therapy
journal, August 2013

A design of a compact gantry for proton therapy with 2D-scanning
journal, May 1999

The PSI Gantry 2: a second generation proton scanning gantry
journal, January 2004