Scintillation detector assembly

• US 9,360,563 B2
• Filed: 02/13/2014
• Issued: 06/07/2016
• Est. Priority Date: 08/24/2009
• Status: Active Grant

• Current Assignee: Luxium Solutions LLC
• Original Assignee: Saint-Gobain Ceramics & Plastics Incorporated (Compagnie De Saint-Gobain)
• Inventors: Perna, Louis
• Primary Examiner(s): Bryant, Casey
• Application Number:
  US14/179,945
• Publication Number:
  US 20140158891A1
• Time in Patent Office: 845 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 6/037 Emission tomography
• CPC Class Codes: A61B 6/4258 for detecting non x-ray radiation, e.g. gamma radiation A61B6/037 takes precedence
• CPC Class Codes: G01T 1/20 with scintillation detectors
• CPC Class Codes: G01T 1/2002 Optical details, e.g. reflecting or diffusing layers
• CPC Class Codes: G01T 1/2006 using a combination of a scintillator and photodetector which measures the means radiation intensity
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor

Abstract

The present disclosure relates to a scintillation assembly. The assembly may include a scintillator having a surface, a pressure sensitive adhesive layer contacting at least a portion of said surface, and a reflector proximal to the scintillator surface and adhered to the scintillator surface by the pressure sensitive adhesive layer, wherein the adhesive layer exhibits a TTV of 0.01 mm or less.

Claims

1. A scintillation assembly, comprising:

a first scintillator having a first photodetector surface and a first side surface adjacent to said first photodetector surface;

a second scintillator having a second photodetector surface and a second side surface adjacent to said second photodetector surface;

a first pressure sensitive adhesive layer directly contacting at least a portion of said first and second side surfaces, wherein the first pressure sensitive adhesive includes an optically clear pressure sensitive adhesive comprising acrylic;

a diffuse reflector including a fluoropolymer proximal to said first and second side surfaces and adhered to said first and second side surfaces by said first pressure sensitive adhesive layer, wherein;

said first and second scintillators are disposed along a same side of said reflector;

said first pressure sensitive adhesive layer is disposed between said reflector and said first side surface;

said first pressure sensitive adhesive layer is disposed between said reflector and said second side surface; and

said first pressure sensitive adhesive layer has a thickness in a range of 0.02 mm to 0.1 mm, exhibits a TTV of 0.01 mm or less and transmits 90% or more of incident light having a wavelength in a range of 340 nm to 800 nm.

2. The scintillation assembly of claim 1, wherein said first pressure sensitive adhesive layer comprises a sheet of adhesive including a first side and a second side, wherein said first side is adhered on at least a portion of said first and second side surfaces and said second side is adhered to said reflector.

3. The scintillation assembly of claim 1, further comprising:

a third scintillator having a third photodetector surface and a third side surface adjacent to said third photodetector surface;

a fourth scintillator having a fourth photodetector surface and a fourth side surface adjacent to said fourth photodetector surface; and

a second pressure sensitive adhesive layer directly contacting at least a portion of said third and fourth side surfaces, wherein said second pressure sensitive adhesive includes an optically clear pressure sensitive adhesive and said reflector is adhered to said third and fourth side surfaces by said second pressure sensitive adhesive layer.

4. The scintillation assembly of claim 1, wherein said first pressure sensitive adhesive layer exhibits a refractive index of 1.00 to 1.60 at a wavelength of 630 nm.

5. The scintillation assembly of claim 1, wherein said first pressure sensitive adhesive layer exhibits a haze of 10% or less at a wavelength in the range of 340 nm to 800 nm.

6. The scintillation assembly of claim 1, wherein said first pressure sensitive adhesive layer has a thickness of 0.025 mm to 0.075 mm.

7. The scintillation assembly of claim 1, wherein said diffuse reflector comprises polytetrafluoroethylene.

8. The scintillation assembly of claim 1, wherein said scintillator assembly is present in a medical device.

9. The scintillation assembly of claim 1, wherein said scintillator assembly is present in a well logging detector.

10. The scintillation assembly of claim 1, wherein said scintillator assembly is present in an inspection apparatus.

11. The scintillation assembly of claim 10, wherein said inspection apparatus is selected from the group consisting of a thermal neutron activation analysis detector, luggage scanner, thickness gauge, liquid level gauge, active security device, active manifest verification device, passive security device, passive manifest verification device, active spectrometer, passive spectrometer, active gross counter and passive gross counter.

12. The scintillation assembly of claim 1, wherein said scintillator assembly is present in a research device.

13. A method of forming a scintillation device, the method comprising:

providing a first scintillator and a second scintillator, wherein;

said first scintillator having a first photodetector surface and a first side surface adjacent to said first photodetector surface;

said second scintillator having a second photodetector surface and a second side surface adjacent to said second photodetector surface; and

adhering a diffuse reflector including a fluoropolymer to at least a portion of said first side surface of said first scintillator and said second side surface of said second scintillator, wherein

said diffuse reflector is adhered to said first and second side surfaces by a pressure sensitive adhesive layer that directly contacts said first and second side surfaces, wherein;

said first and second scintillators are disposed along a same side of said reflector; and

said pressure sensitive adhesive layer includes an optically clear pressure sensitive adhesive comprising acrylic and has a thickness in a range of 0.02 mm to 0.1 mm, exhibits a TTV of 0.01 mm or less, transmits 90% or more of incident light having a wavelength in a range of 340 nm to 800 nm, and is disposed between said reflector and said first and second side surfaces.

14. The method of claim 13, wherein said pressure sensitive adhesive layer is an adhesive sheet.

15. The method of claim 13, wherein said pressure sensitive adhesive layer exhibits a refractive index of 1.47 at a wavelength of 630 nm.

16. The method of claim 13, wherein said pressure sensitive adhesive layer exhibits a haze of 10% or less at a wavelength in the range of 340 nm to 800 nm.

17. The method of claim 13, wherein said diffuse reflector comprises polytetrafluoroethylene.

18. A scintillation detection system, comprising:

a scintillator assembly including;

a first scintillator having a first photodetector surface and a first side surface adjacent to said first photodetector surface;

a second scintillator having a second photodetector surface and a second side surface adjacent to said second photodetector surface;

a first pressure sensitive adhesive layer directly contacting at least a portion of said first and second side surfaces, wherein the first pressure sensitive adhesive includes an optically clear pressure sensitive adhesive; and

a diffuse reflector comprising a fluoropolymer proximal to said first and second side surfaces and adhered to said first and second side surfaces by said first pressure sensitive adhesive layer, wherein;

said first and second scintillators are disposed along a same side of said reflector;

said first pressure sensitive adhesive layer is disposed between said reflector and said first side surface;

said first pressure sensitive adhesive layer is disposed between said reflector and said second side surface;

a third scintillator having a third photodetector surface and a third side surface adjacent to said third photodetector surface;

a fourth scintillator having a fourth photodetector surface and a fourth side surface adjacent to said fourth photodetector surface; and

a second pressure sensitive adhesive layer directly contacting at least a portion of said third and fourth side surfaces, wherein said second pressure sensitive adhesive includes an optically clear pressure sensitive adhesive and said reflector is adhered to said third and fourth side surfaces by said second pressure sensitive adhesive layer;

a photodetector in optical communication with said first, second, third, and fourth scintillators and adjacent to said first, second, third, and fourth photodetector surfaces; and

an analyzer in electrical communication with said photodetector,

wherein each of said first and second adhesive layers has a thickness in a range of 0.02 mm to 0.1 mm, exhibits a TTV of 0.01 mm or less and transmits 90% or more of incident light having a wavelength in a range of 340 nm to 800 nm.

19. The scintillation assembly of claim 18, wherein each of said first and second pressure sensitive adhesive layers has a thickness of 0.025 mm to 0.075 mm.

20. The scintillation assembly of claim 18, wherein said diffuse reflector comprises polytetrafluoroethylene.