Detector assembly for a scintillation article

1. A detector assembly comprising:

a detector housing;

a radiation detector;

a cap assembly configured to close an end of the detector housing, the cap assembly comprising:

a radially expandable member configured to expand radially within the detector housing and lock the position of the cap assembly relative to the detector housing; and

a biasing member disposed between the radiation detector and the radially expandable member.

2. The detector assembly of claim 1 , wherein the cap assembly is coupled to the end of the detector and configured to seal the detector housing.

3. The detector assembly of claim 1 , wherein the radiation detector includes a scintillator material.

4. The detector assembly of claim 1 , wherein the cap assembly comprises a lock disk configured to lock the axial position of a portion of the cap assembly within an interior of the detector housing.

5. The detector assembly of claim 4 , wherein the radially expandable member comprises a lock ring and the lock ring is configured to engage an exterior surface of the lock disk.

6. The detector assembly of claim 4 , wherein the cap assembly further comprises a shield cap.

7. The detector assembly of claim 6 , wherein the shield cap is directly connected to the lock disk.

8. The detector assembly of claim 7 , wherein the shield cap is fastened to the lock disk.

9. The detector assembly of claim 8 , wherein the shield cap comprises a fastener configured to engage the lock disk, and wherein the fastener is spaced apart from the detector housing.

10. The detector assembly of claim 6 , wherein the lock disk is a first component directly connected to the detector housing, and the shield cap is a second component indirectly connected to the detector housing.

11. The detector assembly of claim 1 , wherein the radially expandable member comprises a lock ring.

12. The detector assembly of claim 11 , wherein the lock ring is a split ring.

13. The detector assembly of claim 11 , wherein the cap assembly further comprises a push plate and the lock disk is disposed between the push plate and the shield cap in a closed position.

14. The detector assembly of claim 13 , wherein the push plate comprises a hub extending axially through an opening in the lock disk.

15. The detector assembly of claim 14 , wherein the hub has a length sufficient to extend fully through the opening of the lock disk and engage a surface of the shield cap.

16. The detector assembly of claim 1 , wherein the radially expandable member is configured to engage a surface feature at an inner surface of the detector housing.

17. A detector assembly comprising:

a detector housing; and

a cap assembly configured to close an end of the detector housing, wherein the cap assembly comprises:

a radially expandable member configured to expand radially within the detector housing and lock the position of the cap assembly relative to the detector housing; and

a lock disk configured to lock the axial position of a portion of the cap assembly within an interior of the detector housing, wherein the lock disk comprises the radially expandable member,

wherein the detector assembly is a radiation detector assembly.

18. The detector assembly of claim 17 , wherein a portion of the body of the lock disk is the radially expandable member.

19. A detector assembly comprising:

a detector housing;

a radiation detector;

a cap assembly configured to close an end of the detector housing, the cap assembly comprising a radially expandable member configured to expand radially within the detector housing and lock the position of the cap assembly relative to the detector housing, wherein the radially expandable member is axially spaced apart from the radiation detector.

20. The detector assembly of claim 19 , wherein the radiation detector is coupled to a sensor.