Synchrotron power supply apparatus and method of use thereof
First Claim
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1. An apparatus for cancer therapy using charged particles, comprising:
- a synchrotron, said synchrotron comprising;
a set of n bending magnets configured to turn the charged particles in a circulation beam path during an acceleration phase of said synchrotron, wherein n is a positive integer of at least four; and
a single power supply simultaneously electrically linked to all of said n bending magnets;
a center, wherein the charged particle circulation beam path passes;
about said center;
through straight sections; and
through turning sections,at least one inductor wrapped about a portion of each turning section; and
an electric circuit configured to link said power supply to said inductor, said power supply configured to deliver a first voltage at a terminus of the acceleration phase to said inductor about said synchrotron,wherein said electric circuit comprises;
at least one electric switch alternately configurable in an open position and in a closed position; and
at least one resistor, said switch configured in said open position to direct current through said resistor during a recovery period following the terminus of the acceleration phase,wherein each of said turning sections comprises a plurality of said bending magnets, andwherein a number of said straight sections equals a number of said turning sections.
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Abstract
The invention comprises a charged particle cancer therapy system or synchrotron system using a single power supply electrically connected to a plurality of magnet sections to provide a uniform current to a plurality of magnets at a given period in time. Optionally, one or more switches introduce a corresponding one or more resistors into a circuit linking the power supply to a magnet or an inductor during an applied power recovery phase between acceleration cycles of the synchrotron, which reduces time of reduction in power from an active applied power to a power suitable for use with a subsequent injection of charged particles into the synchrotron.
383 Citations
18 Claims
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1. An apparatus for cancer therapy using charged particles, comprising:
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a synchrotron, said synchrotron comprising; a set of n bending magnets configured to turn the charged particles in a circulation beam path during an acceleration phase of said synchrotron, wherein n is a positive integer of at least four; and a single power supply simultaneously electrically linked to all of said n bending magnets; a center, wherein the charged particle circulation beam path passes; about said center; through straight sections; and through turning sections, at least one inductor wrapped about a portion of each turning section; and an electric circuit configured to link said power supply to said inductor, said power supply configured to deliver a first voltage at a terminus of the acceleration phase to said inductor about said synchrotron, wherein said electric circuit comprises; at least one electric switch alternately configurable in an open position and in a closed position; and at least one resistor, said switch configured in said open position to direct current through said resistor during a recovery period following the terminus of the acceleration phase, wherein each of said turning sections comprises a plurality of said bending magnets, and wherein a number of said straight sections equals a number of said turning sections. - View Dependent Claims (2, 6, 7, 9, 10, 11, 12)
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3. An apparatus for cancer therapy using charged particles, comprising:
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a synchrotron, said synchrotron comprising; a set of n bending magnets configured to turn the charged particles in a circulation beam path during an acceleration phase of said synchrotron, wherein n is a positive integer of at least four; and a single power supply simultaneously electrically linked to all of said n bending magnets, wherein at least two of said bending magnets further comprise a magnetic field focusing section, said focusing section comprising; a magnet core geometry tapering as a continuous function from a first cross-sectional area to a parallel second cross-sectional area, said second cross-sectional area comprising less than two-thirds of an area of said first cross-sectional area, said second cross-sectional area proximate the circulation beam path.
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4. An apparatus for cancer therapy using charged particles, comprising:
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a synchrotron, said synchrotron comprising; a set of n bending magnets configured to turn the charged particles in a circulation beam path during an acceleration phase of said synchrotron, wherein n is a positive integer of at least four; a single power supply simultaneously electrically linked to all of said n bending magnets; a center, wherein the charged particle circulation beam path passes; about said center; through straight sections; and through turning sections, and a first focusing edge;
a second focusing edge;
a third focusing edge; and
a fourth focusing edge,wherein each of said turning sections comprises a plurality of said bending magnets, wherein a number of said straight sections equals a number of said turning sections, wherein a first of said turning sections comprises a first bending magnet and a second bending magnet of said n bending magnets, wherein said first bending magnet terminates on opposite sides with said first focusing edge and said second focusing edge, wherein a first plane established by said first focusing edge intersects a second plane established by said second focusing edge beyond said center of said synchrotron, wherein said second bending magnet terminates on opposite sides with said third focusing edge and said fourth focusing edge, wherein a third plane established by said third focusing edge intersects a fourth plane established by said fourth focusing edge beyond said center of said synchrotron, and wherein all of said first focusing edge;
said second focusing edge;
said third focusing edge; and
said fourth focusing edge bend the charged particles toward said center of said synchrotron during use.
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5. An apparatus for cancer therapy using charged particles, comprising:
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a synchrotron, said synchrotron comprising; a set of n bending magnets configured to turn the charged particles in a circulation beam path during an acceleration phase of said synchrotron, wherein n is a positive integer of at least four; and a single power supply simultaneously electrically linked to all of said n bending magnets, and a center, wherein the charged particle circulation beam path passes; about said center; through straight sections; and through turning sections, wherein each of said turning sections comprises a plurality of said bending magnets, wherein a number of said straight sections equals a number of said turning sections, and wherein said turning sections each comprise at least four of said n bending magnets, said at least four of said n bending magnets comprising at least eight edge focusing surfaces, said geometry of said edge focusing surfaces configured to focus the charged particles in the charged particle circulation beam path during use.
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8. An apparatus for cancer therapy using charged particles, comprising:
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a synchrotron, said synchrotron comprising; a set of n bending magnets configured to turn the charged particles in a circulation beam path during an acceleration phase of said synchrotron, wherein n is a positive integer of at least four; a single power supply simultaneously electrically linked to all of said n bending magnets; and a center, wherein the charged particle circulation beam path passes; about said center; through straight sections; and through turning sections, wherein each of said turning sections comprises a plurality of said bending magnets, wherein a number of said straight sections equals a number of said turning sections, and wherein said turning sections comprise; exactly four turning sections; and at least thirty-two charged particle edge focusing surfaces.
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13. A method for accelerating charged particles for cancer therapy, comprising the steps of:
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providing a synchrotron, said synchrotron comprising; a set of n bending magnets, wherein n is a positive integer of at least four; and a circulation beam path; simultaneously providing power from a single power supply to all of said n bending magnets; turning the charged particles in said circulation beam path during an acceleration phase of said synchrotron using magnetic fields in said bending magnets; applying a first acceleration voltage, using said single power supply, to an inductor via an electrical circuit during an acceleration period of said synchrotron, said inductor configured to generate a magnetic field through a portion of at least one of said n bending magnets; and opening a first switch in said electrical circuit to add a first resistor to said electrical circuit during a recovery time period after said acceleration period, wherein said first resistor results in a decrease of said voltage to said inductor. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification