Polymer X-Ray Window with Diamond Support Structure

• US 20080296479A1
• Filed: 06/01/2007
• Published: 12/04/2008
• Est. Priority Date: 06/01/2007
• Status: Abandoned Application

• Current Assignee: Moxtek Inc (Nippon Kayaku Company Limited)
• Original Assignee: Moxtek Inc (Nippon Kayaku Company Limited)
• Inventors: Anderson, Eric C., Perkins, Raymond T., Decker, Keith W., Xu, Degao
• Application Number:
  US11/756,962
• Publication Number:
  US 20080296479A1
• Time in Patent Office: Days
• US Class Current: 250/226
• CPC Class Codes: H01J 47/004 Windows permeable to X-rays, gamma-rays, or particles windows for discharge tubes with provision for emergence of electrons or ions from the vessel H01J33/04; windows for X-ray tubes H01J35/18
• CPC Class Codes: H01J 5/18 Windows permeable to X-rays, gamma-rays, or particles

Abstract

A high strength window for a radiation detection system has a plurality of ribs comprising diamond material. The plurality of ribs defines a grid having openings therein. The tops of the ribs terminate generally in a common plane and the height of the ribs is sufficiently thin to allow some radiation to pass directly through the diamond material of the ribs. The high strength window also has a support frame around a perimeter of the grid. A layer of thin polymer film material is disposed over and spans the plurality of ribs and openings to pass radiation therethrough. A radiation detection system comprises a high strength window as described above and a sensor behind the window. The sensor is configured to detect radiation that passes thought the window.

Claims

1. A window for a radiation detection system, the window comprising:

a) a plurality of ribs comprising diamond material, the plurality of ribs defining a grid having openings therein, wherein tops of the ribs terminate generally in a common plane, and wherein a height of the ribs is sufficiently thin to allow some radiation to pass directly through the diamond material of the ribs;

b) a support frame around a perimeter of the grid; and

c) a layer of thin polymer film material disposed over and spanning the plurality of ribs and openings capable of passing radiation therethrough.

2. A window as in claim 1, wherein the openings in the grid comprise at least 75% of a total area within the frame, and the plurality of ribs comprise no more than 25% of the total area within the frame.

3. A window as in claim 1, wherein the openings in the grid comprise at least 90% of the total area within the frame, and the plurality of ribs comprise no more than 10% of the total area within the frame.

4. A window as in claim 1, wherein the height of the ribs is from about 50 μ

m to about 100 μ

m.

5. A window as in claim 1, wherein a thickness of the film is less than approximately 0.30 μ

m.

6. A window as in claim 1, wherein the diamond material comprises polycrystalline diamond (PCD).

7. A window as in claim 1, wherein the plurality of ribs is configured to substantially eliminate spectral contamination of radiation passing through the high strength window.

8. A window as in claim 1, further comprising a gas barrier film layer disposed over the layer of thin polymer film material.

9. A window for a radiation detection system, the window comprising:

a) a frame;

b) a plurality of ribs carried by the frame and defining a grid with openings therein;

c) the ribs having a thickness of between approximately 50 to 100 μ

m;

d) the ribs being formed of a diamond material; and

e) a film disposed over the ribs and spanning the openings;

f) the film including a polymer material; and

g) the film having a thickness less than approximately 0.30 μ

m.

10. A window as in claim 9, wherein the openings in the grid comprise at least 75% of a total area within the frame, and the plurality of ribs comprise no more than 25% of the total area within the frame.

11. A window as in claim 9, wherein the openings in the grid comprise at least 90% of the total area within the frame, and the plurality of ribs comprise no more than 10% of the total area within the frame.

12. A window as in claim 9, wherein the diamond material comprises polycrystalline diamond (PCD).

13. A radiation detection system comprising:

a) a window for passing radiation therethrough, comprising;

i) a plurality of ribs comprising diamond material, the plurality of ribs defining a grid having openings therein, wherein tops of the ribs terminate substantially in a common plane, and wherein a height of the ribs is sufficiently thin to allow some radiation to pass directly through the diamond material of the ribs;

ii) a support frame around a perimeter of the grid; and

iii) a layer of thin polymer film material disposed over and spanning the plurality of ribs and openings; and

b) a sensor behind the window configured to detect radiation that passes through the window.

14. A window as in claim 13, wherein the openings in the grid comprise at least 75% of a total area within the frame, and the plurality of ribs comprise no more than 25% of the total area within the frame.

15. A window as in claim 13, wherein the openings in the grid comprise at least 90% of the total area within the frame, and the plurality of ribs comprise no more than 10% of the total area within the frame.

16. A window as in claim 13, wherein the height of the ribs is from about 50 μ

m to about 100 μ

m.

17. A window as in claim 13, wherein a thickness of the film is less than approximately 0.30 μ

m.

18. A window as in claim 13, wherein the diamond material comprises polycrystalline diamond (PCD).

19. A window as in claim 13, wherein the plurality of ribs is configured to substantially eliminate spectral contamination of radiation passing through the high strength window.