Radiotherapy device
AssigneeElekta Limited
InventorsPeter Doherty, Emma Wooldridge, Ian Shinton
Life of this patent
Estimating the term…
Abstract
A particle accelerator comprising a waveguide comprising a series of acceleration cells. The series of acceleration cells comprise an input acceleration cell configured to accelerate a beam of electrons along the central axis of the cells. A source of electrons is configured to input a beam of electrons into the input acceleration cell and a magnet arrangement is configured to prevent electrons that have deviated from the beam of electrons from hitting the source of electrons.
Claims19
A particle accelerator comprising:
- a waveguide comprising a series of acceleration cells, wherein the series of acceleration cells includes an input acceleration cell, configured to accelerate a beam of electrons along a central axis of the series of acceleration cells;
- a source of electrons configured to input the beam of electrons into the input acceleration cell;
- and
- a magnet arrangement configured to prevent one or more electrons that have deviated from the beam of electrons from colliding with the source of electrons and configured to redirect the one or more electrons that have deviated from the beam of electrons by approximately 180 degrees back towards the beam of electrons.
A method for use in a particle accelerator, the method comprising:
- producing a beam of electrons from a source of electrons;
- inputting the beam of electrons into an input acceleration cell of a waveguide;
- applying an RF field to the waveguide to create an oscillating electric field along a central axis of the waveguide to accelerate the beam of electrons along the central axis;
- trapping electrons that have deviated from the beam of electrons using a magnet arrangement, wherein the magnet arrangement is configured to redirect one or more electrons that have deviated from the beam of electrons by approximately 180 degrees back towards the beam of electrons;
- and
- turning off the magnet arrangement to allow trapped electrons to join the beam of electrons.
A radiotherapy device comprising:
- a particle accelerator, the particle accelerator including:
- a waveguide comprising a series of acceleration cells, wherein the series of acceleration cells comprises an input acceleration cell, configured to accelerate a beam of electrons along a central axis of the series of acceleration cells;
- a source of electrons configured to input the beam of electrons into the input acceleration cell;
- and
- a magnet arrangement configured to prevent one or more electrons that have deviated from the beam of electrons from colliding with the source of electrons and configured to redirect the one or more electrons that have deviated from the beam of electrons by approximately 180 degrees back towards the beam of electrons.
A particle accelerator arranged to receive a beam of electrons, comprising:
- a waveguide including a series of acceleration cells, wherein the series of acceleration cells includes an input acceleration cell;
- a source of electrons configured to input electrons into the input acceleration cell;
- and
- a diversion channel configured to remove electrons from the waveguide that are traveling towards the source of electrons, wherein the diversion channel is further configured to redirect the removed electrons by approximately 180 degrees back toward the input acceleration cell using a magnetic field.
Dependencies are inferred from the claim text.