Ionizing particle beam fluence and position detector array with multi-coordinate readout

• US 10,617,889 B1
• Filed: 04/22/2019
• Issued: 04/14/2020
• Est. Priority Date: 05/06/2016
• Status: Active Grant

• Current Assignee: Radiation Detection And Imaging Technologies, LLC
• Original Assignee: Radiation Detection And Imaging Technologies, LLC
• Inventors: Galyaev, Evgeny
• Primary Examiner(s): Johnston, Phillip A
• Application Number:
  US16/391,202
• Time in Patent Office: 358 Days
• Field of Search: 600 1
• CPC Class Codes: A61N 2005/1087 Ions; Protons
• CPC Class Codes: A61N 5/1048 Monitoring, verifying, controlling systems and methods
• CPC Class Codes: A61N 5/1049 for verifying the position of the patient with respect to the radiation beam
• CPC Class Codes: A61N 5/1065 Beam adjustment
• CPC Class Codes: A61N 5/1075 for testing, calibrating, or quality assurance of the radiation treatment apparatus
• CPC Class Codes: A61N 5/1077 Beam delivery systems
• CPC Class Codes: G01T 1/185 with ionisation chamber arrangements
• CPC Class Codes: G01T 1/2935 using ionisation detectors
• CPC Class Codes: H01J 37/08 Ion sources; Ion guns
• CPC Class Codes: H01J 37/244 Detectors; Associated components or circuits therefor
• CPC Class Codes: H01J 47/02 Ionisation chambers

Abstract

A particle beam detector system can comprise a particle beam generator, a particle beam fluence and position detector array based on Micromegas technology, and data readout electronics coupled to the position detector array. The particle beam fluence and position detector array can comprise a sealed, gas-filled, ionizing radiation detector chamber. A printed circuit board (PCB) can be disposed within the ionizing radiation detector chamber, the PCB comprising a multi-layer array arrangement of interconnected conductive sensor pads comprising three planar coordinate grids, X, Y, and ST (stereo) situated on separate layers of the PCB. The multi-layer array arrangement of interconnected conductive sensor pads can comprise a first footprint. A dielectric lattice structure can be disposed over the PCB and the multi-layer array arrangement of sensors. A conductive mesh structure can comprise a second footprint disposed over the dielectric lattice structure and extending over an entire area of the first footprint.

Claims

1. A particle beam detector system, comprising:

a particle beam generator;

a particle beam fluence and position detector array comprising;

a radiation detector chamber,

a substrate disposed within the radiation detector chamber, the substrate comprising a multi-layer array arrangement of interconnected conductive sensor pads with the conductive sensor pads disposed on the substrate and coupled to an interconnected series of corresponding strips comprising three planar coordinate grids, X, Y, and ST (stereo), the interconnected series of corresponding strips being situated as separate layers,

wherein the interconnected conductive sensor pads form a plurality of interlocking three-coordinate detection clusters with each three-coordinate detection cluster coupled to the three planar coordinate grids, X, Y, and ST, such that the plurality of three-coordinate detection clusters extend across the substrate in a repeating pattern,

electronic signal acquisition channels coupled to each of the conductive sensor pads and corresponding strips of the particle beam fluence and position detector array; and

data readout electronics coupled to the electronic signal acquisition channels.

2. The particle beam detector system of claim 1, further comprising:

the arrangement of interconnected conductive sensor pads comprising a first footprint;

a dielectric lattice structure disposed over the substrate and extending away from the multi-layer array arrangement of sensors; and

a conductive mesh structure comprising a second footprint disposed over the dielectric lattice structure and the substrate, the second footprint extending over an entire area of the first footprint.

3. The particle beam detector system of claim 1, wherein the plurality of interlocking three-coordinate detection clusters comprise a diamond shape X coordinate sensor, a diamond shape Y coordinate sensor, and a diamond shape ST coordinate sensor joined to form the interlocking three-coordinate detection clusters comprising a hexagonal shape.

4. The particle beam detector system of claim 1, wherein the electronic signal acquisition channels connected to each of the corresponding strips of the particle beam fluence and position detector array for resolving incoming flux intensity variations comprises fewer electronic signal acquisition channels than a second number of electronic signal acquisition channels using individual independent collector pads, wherein the second number of independent collector channels increases by a power law.

5. The particle beam detector system of claim 1, wherein the detector array comprises a curved surface to produce a cylindrical detector.

6. The particle beam detector system of claim 1, wherein the dielectric lattice structure comprises a wall thickness in a range of 0.003-0.5 millimeters (mm) and a height in a range of 50-300 micrometers (μ

m).

7. The particle beam detector system of claim 1, wherein:

the particle beam generator is adapted to send an ionizing particle beam to the detector array; and

the position detector array is oriented substantially perpendicular to a direction of a beam produced by the particle beam generator.

8. The particle beam detector system of claim 1, wherein the radiation detector chamber comprises a sealed, gas-filled, ionizing radiation detector chamber.

9. A particle beam detector array, comprising:

a radiation detector chamber;

a substrate disposed within the radiation detector chamber, the substrate comprising a multi-layer array arrangement of interconnected conductive sensor pads coupled to an interconnected series of corresponding strips comprising three planar coordinates X, Y, and ST (stereo), the sensor pads situated on the substrate, and the interconnected series of corresponding strips situated on three separate layers of the substrate; and

wherein the interconnected conductive sensor pads form a plurality of interlocking three-coordinate detection clusters with each three-coordinate detection cluster coupled to the three planar coordinate grids, X, Y, and ST, such that the plurality of three-coordinate detection clusters extend across the substrate in a repeating pattern.

10. The particle beam detector array of claim 9, further comprising:

a dielectric lattice structure, disposed over the substrate and the plurality of interlocking three-coordinate detection clusters; and

a conductive mesh structure disposed over the dielectric lattice structure.

11. The particle beam detector array of claim 9, wherein the plurality of interlocking three-coordinate detection clusters comprise a diamond shape X coordinate sensor, a diamond shape Y coordinate sensor, and a diamond shape ST coordinate sensor join to form a hexagonal shape.

12. The particle beam detector array of claim 9, wherein the substrate comprises a PCB.

13. The particle beam detector array of claim 9, wherein a first number of electronic signal acquisition channels for resolving incoming flux intensity variations is lower than a second number of electronic signal acquisition channels using individual independent collector pads for which the second number of independent collector channels increases by a power law.

14. The particle beam detector array of claim 9, wherein the multi-layer array arrangement comprises a curved surface to produce a cylindrical detector.

15. The particle beam detector array of claim 10, wherein the dielectric lattice structure comprises a wall thickness in a range of 0.003-0.5 millimeters (mm) and a height in a range of 50-300 micrometers (μ

m).

16. A particle beam detector array, comprising:

a radiation detector chamber;

a multi-layer array arrangement of interconnected conductive sensor pads disposed within the radiation detection chamber and coupled to an interconnected series of corresponding strips comprising three planar coordinates X, Y, and ST (stereo); and

wherein the interconnected conductive sensor pads form a plurality of interlocking three-coordinate detection clusters extending in a repeating pattern.

17. The particle beam detector array of claim 16, further comprising:

a dielectric lattice structure disposed over the plurality of interlocking three-coordinate detection clusters; and

a conductive mesh structure disposed over the dielectric lattice structure.

18. The particle beam detector array of claim 16, wherein the plurality of interlocking three-coordinate detection clusters comprise a diamond shape X coordinate sensor, a diamond shape Y coordinate sensor, and a diamond shape ST coordinate sensor join to form a hexagonal shape.

19. The particle beam detector array of claim 16, wherein a first number of electronic signal acquisition channels for resolving incoming flux intensity variations is lower than a second number of electronic signal acquisition channels using individual independent collector pads for which the second number of independent collector channels increases by a power law.

20. The particle beam detector array of claim 16, wherein the radiation detector chamber comprises a sealed, gas-filled, ionizing radiation detector chamber.