EP0222786A1 - Cyclotron. - Google Patents
Cyclotron.Info
- Publication number
- EP0222786A1 EP0222786A1 EP86902291A EP86902291A EP0222786A1 EP 0222786 A1 EP0222786 A1 EP 0222786A1 EP 86902291 A EP86902291 A EP 86902291A EP 86902291 A EP86902291 A EP 86902291A EP 0222786 A1 EP0222786 A1 EP 0222786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cyclotron
- sectors
- hills
- valleys
- air gap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 34
- 230000004907 flux Effects 0.000 claims abstract description 14
- 230000001133 acceleration Effects 0.000 claims description 10
- 239000003302 ferromagnetic material Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H13/00—Magnetic resonance accelerators; Cyclotrons
Definitions
- the present invention relates to a conventional cyclotron of a new design which makes it possible to significantly reduce the energy requirements.
- cyclotrons using superconductive coils superconductive cyclotrons
- cyclotrons using non-superconductive coils conventional cyclotrons
- superconductive cyclotrons do not use electrical power to maintain the magnetic field necessary for the acceleration of particles.
- the technology of superconducting coils and associated cryogenics remains complex and expensive.
- these coils require liquid helium as the coolant.
- each separate sector is equipped with a pair of coils. These coils are of complex shape (sector-shaped) and, to free the free space between the sectors, they must be of minimum section.
- the object of the present invention is to provide a new type of non-superconductive cyclotron where the electrical power required to produce the magnetic field is much lower than in the above-mentioned conventional cyclotrons, namely the "compact" cyclotron and the cyclotron. "with separate sectors”.
- This object can be achieved by a new magnetic structure where there is a small air gap, which reduces the number of amps / turn required, but also a pair of essentially circular coils and of large sec ⁇ tion, which reduces the current density and therefore the electrical power required to produce the number of amps / turn required.
- Another object of the invention is to avoid in the new structure the mechanical complexity inherent in so-called "separate sector” cyclotrons.
- This new structure specific to the conventional cyclotron according to the invention is characterized in that it comprises at least three sectors called “hills” where the air gap is reduced to a dimension close to that of the accelerated beam and where the magnetic flux is essentially concentrated, separated by spaces in the form of a sector called “valleys", where the air gap is very large (for example, but not limited to, where the air gap is of the order of 30 times that of the hills), so that * the magnetic flux is essentially zero and by a single pair of essentially circular coils essentially surrounding the "hills” and the "valleys", de ⁇ flux returns being arranged outside the coil opposite the "hills” , with a view to closing the magnetic circuit.
- cyclotron Another characteristic of the cyclotron according to the invention is that the sectors called “hills” are rigidly assembled on two plates called “cuasse” forming lids for the vacuum box and channeling the magnetic flux towards the returns of aforementioned flows.
- the cyclotron preferably comprises four sectors made of a conventional magnetic material.
- a great advantage of the device according to the invention lies in the fact that the acceleration electrodes can be arranged in the "valleys" and that, consequently, the air gap can be reduced to a minimum, that is to say at the location necessary for the circulation of the particles to be accelerated. This results in a notable saving in the energy consumed.
- Another advantage of the cyclotron according to the design principle of the invention lies in the simplicity of the coils which provide the magnetic induction field.
- the magnetic flux is concentrated in the "hills" where the air gap is minimum and essentially zero in the "valleys" where the air gap is large.
- the design of the cyclotron according to the invention makes it possible to house the vertical beam accelerator electrodes as well as the final stage of the power amplifier directly in the "valleys".
- the plate of the electrode is inductively coupled to the cavity of the cyclotron. The stability of the system is only improved.
- FIG. 1 shows a schematic section along the median plane of a cyclotron according to the invention
- - Figure 2 shows a section along line II-II of Figure 1.
- the magnetic structure of the cyclotron has a symmetry with respect to the plane in which the particles are accelerated, called "median plane" 17, for example placed horizontally and with respect to an axis 26 perpendicular to this plane.
- This magnetic structure consists of a certain number of elements made of a ferro- material. magnetic (3, 5, 11, 13, 13 ') and a pair of coils made of a conductive material (21, 23).
- the ferromagnetic structure consists of:
- the angular spaces 15 and 15 ' located respectively between the sectors 13 and 13', are called
- valleys The air gap there is important because it extends from the upper yoke 3 to the lower yoke 5. This air gap is there, for example, of the order of 30 times greater than the air gap 19. The magnetic flux in the valleys is essentially zero.
- the central duct 25 is intended to receive, at least in part, the source of particles to be accelerated which are injected into the center of the device by means known per se.
- the angle of a sector is advantageously of the order of 54 °.
- a cyclotron according to the invention advantageously comprises the final stages of two high frequency power amplifiers 27 inductively coupled by a loop to the acceleration electrodes 28 with vertical beam 29, which are housed in the "valleys" between the sectors 13 , 13 '.
- the vacuum chamber (31) can advantageously be very simple. It consists of a ring made of non-magnetic material, extending from the upper yoke 3 to the lower yoke 5 in the space left between the sectors 13, 13 'and the coils 21, 23. Note the advantage of the simplicity of a pair of large coils and the air gap reduced to a minimum, which allows significant energy savings to be obtained.
- the air gap in the hills is 3 cm and the magnetic field 18 kGs, while in the valleys the entre iron is 106 cm and the magnetic field 0.4 kGs.
- the number of ampere turns required is 33,000 At per coil, which, with a current density of 50
- a / cm ⁇ in the coils gives a consumed power of 7 kW for the cyclotron according to the invention against 100 kW for a normal cyclotron.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Particle Accelerators (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86902291T ATE54531T1 (de) | 1985-05-10 | 1986-04-30 | Zyklotron. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU85895 | 1985-05-10 | ||
LU85895A LU85895A1 (fr) | 1985-05-10 | 1985-05-10 | Cyclotron |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0222786A1 true EP0222786A1 (fr) | 1987-05-27 |
EP0222786B1 EP0222786B1 (fr) | 1990-07-11 |
Family
ID=19730465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86902291A Expired - Lifetime EP0222786B1 (fr) | 1985-05-10 | 1986-04-30 | Cyclotron |
Country Status (6)
Country | Link |
---|---|
US (1) | US4771208A (fr) |
EP (1) | EP0222786B1 (fr) |
JP (1) | JPH0654719B2 (fr) |
DE (1) | DE3672566D1 (fr) |
LU (1) | LU85895A1 (fr) |
WO (1) | WO1986006924A1 (fr) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6683426B1 (en) | 1999-07-13 | 2004-01-27 | Ion Beam Applications S.A. | Isochronous cyclotron and method of extraction of charged particles from such cyclotron |
US9622335B2 (en) | 2012-09-28 | 2017-04-11 | Mevion Medical Systems, Inc. | Magnetic field regenerator |
US9661736B2 (en) | 2014-02-20 | 2017-05-23 | Mevion Medical Systems, Inc. | Scanning system for a particle therapy system |
US9681531B2 (en) | 2012-09-28 | 2017-06-13 | Mevion Medical Systems, Inc. | Control system for a particle accelerator |
US9706636B2 (en) | 2012-09-28 | 2017-07-11 | Mevion Medical Systems, Inc. | Adjusting energy of a particle beam |
US9723705B2 (en) | 2012-09-28 | 2017-08-01 | Mevion Medical Systems, Inc. | Controlling intensity of a particle beam |
US9730308B2 (en) | 2013-06-12 | 2017-08-08 | Mevion Medical Systems, Inc. | Particle accelerator that produces charged particles having variable energies |
US9925395B2 (en) | 2005-11-18 | 2018-03-27 | Mevion Medical Systems, Inc. | Inner gantry |
US9950194B2 (en) | 2014-09-09 | 2018-04-24 | Mevion Medical Systems, Inc. | Patient positioning system |
US10155124B2 (en) | 2012-09-28 | 2018-12-18 | Mevion Medical Systems, Inc. | Controlling particle therapy |
US10254739B2 (en) | 2012-09-28 | 2019-04-09 | Mevion Medical Systems, Inc. | Coil positioning system |
US10456591B2 (en) | 2013-09-27 | 2019-10-29 | Mevion Medical Systems, Inc. | Particle beam scanning |
US10646728B2 (en) | 2015-11-10 | 2020-05-12 | Mevion Medical Systems, Inc. | Adaptive aperture |
US10653892B2 (en) | 2017-06-30 | 2020-05-19 | Mevion Medical Systems, Inc. | Configurable collimator controlled using linear motors |
US10675487B2 (en) | 2013-12-20 | 2020-06-09 | Mevion Medical Systems, Inc. | Energy degrader enabling high-speed energy switching |
USRE48047E1 (en) | 2004-07-21 | 2020-06-09 | Mevion Medical Systems, Inc. | Programmable radio frequency waveform generator for a synchrocyclotron |
USRE48317E1 (en) | 2007-11-30 | 2020-11-17 | Mevion Medical Systems, Inc. | Interrupted particle source |
US10925147B2 (en) | 2016-07-08 | 2021-02-16 | Mevion Medical Systems, Inc. | Treatment planning |
US11103730B2 (en) | 2017-02-23 | 2021-08-31 | Mevion Medical Systems, Inc. | Automated treatment in particle therapy |
US11291861B2 (en) | 2019-03-08 | 2022-04-05 | Mevion Medical Systems, Inc. | Delivery of radiation by column and generating a treatment plan therefor |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1003551A3 (fr) * | 1989-11-21 | 1992-04-21 | Ion Beam Applic Sa | Cyclotrons focalises par secteurs. |
US5139731A (en) * | 1991-05-13 | 1992-08-18 | Cti, Incorporated | System and method for increasing the efficiency of a cyclotron |
BE1005530A4 (fr) * | 1991-11-22 | 1993-09-28 | Ion Beam Applic Sa | Cyclotron isochrone |
US5463291A (en) * | 1993-12-23 | 1995-10-31 | Carroll; Lewis | Cyclotron and associated magnet coil and coil fabricating process |
BE1009669A3 (fr) * | 1995-10-06 | 1997-06-03 | Ion Beam Applic Sa | Methode d'extraction de particules chargees hors d'un cyclotron isochrone et dispositif appliquant cette methode. |
US6576916B2 (en) | 1998-03-23 | 2003-06-10 | Penn State Research Foundation | Container for transporting antiprotons and reaction trap |
US5977554A (en) * | 1998-03-23 | 1999-11-02 | The Penn State Research Foundation | Container for transporting antiprotons |
US6414331B1 (en) | 1998-03-23 | 2002-07-02 | Gerald A. Smith | Container for transporting antiprotons and reaction trap |
SE513190C2 (sv) * | 1998-09-29 | 2000-07-24 | Gems Pet Systems Ab | Metod och system för minimerande av magnetstorlek i en cyclotron |
EP1385362A1 (fr) * | 2002-07-22 | 2004-01-28 | Ion Beam Applications S.A. | Cyclotron muni de nouveaux moyens d'inflexion du faisceau de particules |
EP1977631B1 (fr) * | 2006-01-19 | 2010-03-03 | Massachusetts Institute of Technology | Structure magnetique pour acceleration de particules |
US7656258B1 (en) | 2006-01-19 | 2010-02-02 | Massachusetts Institute Of Technology | Magnet structure for particle acceleration |
US8003964B2 (en) | 2007-10-11 | 2011-08-23 | Still River Systems Incorporated | Applying a particle beam to a patient |
US8933650B2 (en) | 2007-11-30 | 2015-01-13 | Mevion Medical Systems, Inc. | Matching a resonant frequency of a resonant cavity to a frequency of an input voltage |
US8153997B2 (en) * | 2009-05-05 | 2012-04-10 | General Electric Company | Isotope production system and cyclotron |
EP2410823B1 (fr) | 2010-07-22 | 2012-11-28 | Ion Beam Applications | Cyclotron apte à accélérer au moins deux types de particules |
WO2014052718A2 (fr) | 2012-09-28 | 2014-04-03 | Mevion Medical Systems, Inc. | Focalisation d'un faisceau de particules |
EP2901820B1 (fr) | 2012-09-28 | 2021-02-17 | Mevion Medical Systems, Inc. | Focalisation d'un faisceau de particules à l'aide d'une variation de champ magnétique |
EP2901824B1 (fr) | 2012-09-28 | 2020-04-15 | Mevion Medical Systems, Inc. | Éléments d'homogénéisation de champ magnétique permettant d'ajuster la position de la bobine principale et procédé correspondant |
US8791656B1 (en) | 2013-05-31 | 2014-07-29 | Mevion Medical Systems, Inc. | Active return system |
US9962560B2 (en) | 2013-12-20 | 2018-05-08 | Mevion Medical Systems, Inc. | Collimator and energy degrader |
DE102014003536A1 (de) * | 2014-03-13 | 2015-09-17 | Forschungszentrum Jülich GmbH Fachbereich Patente | Supraleitender Magnetfeldstabilisator |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3175131A (en) * | 1961-02-08 | 1965-03-23 | Richard J Burleigh | Magnet construction for a variable energy cyclotron |
US3789335A (en) * | 1971-10-04 | 1974-01-29 | Thomson Csf | Magnetic focusing device for an isochronous cyclotron |
FR2176485B3 (fr) * | 1972-03-20 | 1978-01-20 | Thomson Csf | |
CA966893A (en) * | 1973-06-19 | 1975-04-29 | Her Majesty In Right Of Canada As Represented By Atomic Energy Of Canada Limited | Superconducting cyclotron |
US3925676A (en) * | 1974-07-31 | 1975-12-09 | Ca Atomic Energy Ltd | Superconducting cyclotron neutron source for therapy |
CA1008125A (en) * | 1975-03-07 | 1977-04-05 | Her Majesty In Right Of Canada As Represented By Atomic Energy Of Canada Limited | Method and apparatus for magnetic field shimming in an isochronous cyclotron |
SU747396A1 (ru) * | 1979-01-04 | 1983-12-30 | Предприятие П/Я А-7904 | Кольцевой циклотрон |
US4445102A (en) * | 1981-11-19 | 1984-04-24 | The United States Of America As Represented By The United States Department Of Energy | Magnet pole tips |
-
1985
- 1985-05-10 LU LU85895A patent/LU85895A1/fr unknown
-
1986
- 1986-04-30 JP JP61502424A patent/JPH0654719B2/ja not_active Expired - Lifetime
- 1986-04-30 WO PCT/BE1986/000014 patent/WO1986006924A1/fr active IP Right Grant
- 1986-04-30 US US07/010,280 patent/US4771208A/en not_active Expired - Lifetime
- 1986-04-30 DE DE8686902291T patent/DE3672566D1/de not_active Expired - Lifetime
- 1986-04-30 EP EP86902291A patent/EP0222786B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8606924A1 * |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6683426B1 (en) | 1999-07-13 | 2004-01-27 | Ion Beam Applications S.A. | Isochronous cyclotron and method of extraction of charged particles from such cyclotron |
USRE48047E1 (en) | 2004-07-21 | 2020-06-09 | Mevion Medical Systems, Inc. | Programmable radio frequency waveform generator for a synchrocyclotron |
US9925395B2 (en) | 2005-11-18 | 2018-03-27 | Mevion Medical Systems, Inc. | Inner gantry |
US10722735B2 (en) | 2005-11-18 | 2020-07-28 | Mevion Medical Systems, Inc. | Inner gantry |
US10279199B2 (en) | 2005-11-18 | 2019-05-07 | Mevion Medical Systems, Inc. | Inner gantry |
USRE48317E1 (en) | 2007-11-30 | 2020-11-17 | Mevion Medical Systems, Inc. | Interrupted particle source |
US9681531B2 (en) | 2012-09-28 | 2017-06-13 | Mevion Medical Systems, Inc. | Control system for a particle accelerator |
US10155124B2 (en) | 2012-09-28 | 2018-12-18 | Mevion Medical Systems, Inc. | Controlling particle therapy |
US10254739B2 (en) | 2012-09-28 | 2019-04-09 | Mevion Medical Systems, Inc. | Coil positioning system |
US9706636B2 (en) | 2012-09-28 | 2017-07-11 | Mevion Medical Systems, Inc. | Adjusting energy of a particle beam |
US10368429B2 (en) | 2012-09-28 | 2019-07-30 | Mevion Medical Systems, Inc. | Magnetic field regenerator |
US9723705B2 (en) | 2012-09-28 | 2017-08-01 | Mevion Medical Systems, Inc. | Controlling intensity of a particle beam |
US9622335B2 (en) | 2012-09-28 | 2017-04-11 | Mevion Medical Systems, Inc. | Magnetic field regenerator |
US9730308B2 (en) | 2013-06-12 | 2017-08-08 | Mevion Medical Systems, Inc. | Particle accelerator that produces charged particles having variable energies |
US10456591B2 (en) | 2013-09-27 | 2019-10-29 | Mevion Medical Systems, Inc. | Particle beam scanning |
US10675487B2 (en) | 2013-12-20 | 2020-06-09 | Mevion Medical Systems, Inc. | Energy degrader enabling high-speed energy switching |
US9661736B2 (en) | 2014-02-20 | 2017-05-23 | Mevion Medical Systems, Inc. | Scanning system for a particle therapy system |
US11717700B2 (en) | 2014-02-20 | 2023-08-08 | Mevion Medical Systems, Inc. | Scanning system |
US10434331B2 (en) | 2014-02-20 | 2019-10-08 | Mevion Medical Systems, Inc. | Scanning system |
US9950194B2 (en) | 2014-09-09 | 2018-04-24 | Mevion Medical Systems, Inc. | Patient positioning system |
US10786689B2 (en) | 2015-11-10 | 2020-09-29 | Mevion Medical Systems, Inc. | Adaptive aperture |
US11213697B2 (en) | 2015-11-10 | 2022-01-04 | Mevion Medical Systems, Inc. | Adaptive aperture |
US11786754B2 (en) | 2015-11-10 | 2023-10-17 | Mevion Medical Systems, Inc. | Adaptive aperture |
US10646728B2 (en) | 2015-11-10 | 2020-05-12 | Mevion Medical Systems, Inc. | Adaptive aperture |
US10925147B2 (en) | 2016-07-08 | 2021-02-16 | Mevion Medical Systems, Inc. | Treatment planning |
US11103730B2 (en) | 2017-02-23 | 2021-08-31 | Mevion Medical Systems, Inc. | Automated treatment in particle therapy |
US10653892B2 (en) | 2017-06-30 | 2020-05-19 | Mevion Medical Systems, Inc. | Configurable collimator controlled using linear motors |
US11291861B2 (en) | 2019-03-08 | 2022-04-05 | Mevion Medical Systems, Inc. | Delivery of radiation by column and generating a treatment plan therefor |
US11311746B2 (en) | 2019-03-08 | 2022-04-26 | Mevion Medical Systems, Inc. | Collimator and energy degrader for a particle therapy system |
US11717703B2 (en) | 2019-03-08 | 2023-08-08 | Mevion Medical Systems, Inc. | Delivery of radiation by column and generating a treatment plan therefor |
Also Published As
Publication number | Publication date |
---|---|
JPH0654719B2 (ja) | 1994-07-20 |
JPS63501533A (ja) | 1988-06-09 |
US4771208A (en) | 1988-09-13 |
DE3672566D1 (de) | 1990-08-16 |
EP0222786B1 (fr) | 1990-07-11 |
LU85895A1 (fr) | 1986-12-05 |
WO1986006924A1 (fr) | 1986-11-20 |
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