X-ray radiation passage window for a radiation detector
An X-ray radiation passage window can be used for a radiation detector. The X-ray radiation passage window for a radiation detector includes a radiation-transmissive window element. The radiation-transmissive window element contains graphene. Furthermore, a radiation detector including an X-ray radiation passage window, a method for producing an X-ray radiation passage window and a use of graphene are disclosed.
1. An X-ray radiation passage window comprising a radiation-transmissive window element, wherein the radiation-transmissive window element has a graphene-containing layer and the graphene-containing layer comprises a graphene multilayer construction, wherein the graphene-containing layer comprises at least 350 graphene monolayers, and wherein the graphene-containing layer has a thickness of less than 2.2 μm.
2. The X-ray radiation passage window according to claim 1 , wherein the graphene-containing layer has a layer thickness of greater than or equal to 100 nm.
3. The X-ray radiation passage window according to claim 1 , wherein the radiation-transmissive window element further comprises a layer that blocks visible light in addition to the graphene-containing layer.
4. The X-ray radiation passage window according to claim 3 , wherein the layer that blocks visible light contains aluminum.
5. The X-ray radiation passage window according to claim 1 , wherein the radiation-transmissive window element further comprises a passivation layer in addition to the graphene-containing layer.
6. The X-ray radiation passage window according to claim 5 , wherein the passivation layer contains boron nitride.
7. The X-ray radiation passage window according to claim 1 , further comprising a window holder element, wherein the radiation-transmissive window element is directly connected to the window holder element.
8. The X-ray radiation passage window according to claim 7 , wherein the graphene-containing layer is directly connected to the window holder element.
9. The X-ray radiation passage window according to claim 7 , wherein the window holder element has a melting temperature of greater than or equal to 1,000° C.
10. The X-ray radiation passage window according to claim 7 , wherein the window holder element contains at least one material selected from the group consisting of Si, SiO 2 , quartz, Si 2 N 4 , SiC, Al 2 O 3 , AlN, Cu, Ni, Mo, and W.
11. The X-ray radiation passage window according to claim 7 , wherein the window holder element is embodied as a cap comprising a metal or a ceramic.
12. A radiation detector comprising:
a detector housing;
an X-ray radiation passage window according to claim 1 ; and
a detector element arranged in the detector housing and configured to detect X-ray radiation.
13. The X-ray radiation passage window according to claim 1 , wherein the X-ray radiation passage window is a window for a radiation detector.
14. The X-ray radiation passage window according to claim 1 , further comprising a window holder element, wherein the graphene-containing layer is connected to the window holder element, and wherein the window holder element contains:
one material selected from the group consisting of Si, SiO 2 , quartz, Si 2 N 4 , SiC, Al 2 O 3 , AlN, Cu, Ni, Mo, and W;
one or a plurality of materials which are compatible with a process in which graphene is deposited onto the one or onto the plurality of said materials; and/or
at least one carbide-forming material.
15. A method for producing an X-ray radiation passage window, the method comprising forming a radiation-transmissive window element, wherein forming the radiation-transmissive window element comprises:
providing a substrate;
depositing a graphene-containing layer over the substrate; and
removing a portion of the substrate, wherein the graphene-containing layer comprises a graphene multilayer construction including at least 350 graphene monolayers, and wherein the graphene-containing layer has a thickness of less than 2.2 μm.
16. The method according to claim 15 , wherein the graphene-containing layer has a layer thickness of greater than or equal to 100 nm.
17. The method according to claim 15 , wherein, before removing the portion of the substrate, the method further comprises applying supporting structures on a side of the graphene-containing layer that faces away from the substrate.
18. The method according to claim 15 , further comprising forming supporting structures while removing the portion of the substrate.
19. The method according to claim 15 , wherein the substrate is structured before the graphene-containing layer is deposited.
20. An X-ray radiation passage window comprising a radiation-transmissive window element, wherein the radiation-transmissive window element has a graphene-containing layer, wherein the graphene-containing layer comprises a graphene multilayer construction including at least 350 graphene monolayers, wherein a supporting structure is formed within the graphene-containing layer such that the graphene-containing layer comprises depressions and regions between depressions, and wherein the graphene-containing layer has a thickness of less than 2.2 μm.
21. An X-ray radiation passage window comprising a radiation-transmissive window element, wherein the radiation-transmissive window element has a graphene-containing layer, wherein the graphene-containing layer comprises a graphene multilayer construction including at least 350 graphene monolayers, wherein the X-ray radiation passage window further comprises a window holder element, wherein the graphene-containing layer is directly connected to the window holder element, wherein the graphene-containing layer has a thickness of less than 2.2 μm, and wherein the window holder element contains:
one material selected from the group consisting of Si, SiO 2 , quartz, Si 2 N 4 , SiC, Al 2 O 3 , AlN, Cu, Ni, Mo, and W,
one or a plurality of materials which are compatible with a process in which graphene is deposited onto the one or onto the plurality of said materials, and/or
at least one carbide-forming material.
22. An X-ray radiation passage window comprising a radiation-transmissive window element, wherein the radiation-transmissive window element has a graphene-containing layer, wherein the graphene-containing layer consists of a plurality of graphene layers arranged on one another, wherein the graphene-containing layer comprises at least 350 graphene monolayers, wherein the graphene-containing layer is mechanically stable under pressure differences greater than 1 bar, and wherein the graphene-containing layer has a thickness of less than 2.2 μm.