Target for Neutron-Generating Device and Manufacturing Method Therefor
First Claim
1. A target for a neutron-generating device that generates neutrons by using a 7Li(p,n)7Be reaction while lithium as a target material is irradiated with proton beams accelerated by an accelerator, the target comprising:
- a metal substrate that retains the target material; and
a metal thin film for sealing that seals the target material onto the metal substrate at a retention surface side holding the target material,the metal substrate comprising;
on the retention surface side,a frame portion; and
an embossed structure comprising;
a plurality of island portions surrounded by the frame portion, the island portions having the same height as the frame portion; and
the rest comprising a recessed portion that is created by decreasing a thickness of a region other than the frame portion and the plurality of island portions by a thickness of the target material,wherein the metal thin film for sealing is used to seal the target material onto the recessed portion of the metal substrate.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are a long-lived target for a neutron-generating device and a method for manufacturing the target therefore. The target is for a neutron-generating device and includes: a metal substrate retaining a target material; and a metal thin film for sealing that holds the target material at a retention surface X side. The retention surface X side of the metal substrate includes: a frame portion; and an embossed structure including: a plurality of island portions that are surrounded by the frame portion; and the rest recessed portion that is created by decreasing a thickness of a region other than the frame portion and the island portions by a thickness of the target material. The metal thin film and surfaces of the frame portion and the island portions are subjected to hot isostearic pressing (HIP) bonding to seal the target material onto the recessed portion by using the metal thin film.
16 Citations
16 Claims
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1. A target for a neutron-generating device that generates neutrons by using a 7Li(p,n)7Be reaction while lithium as a target material is irradiated with proton beams accelerated by an accelerator, the target comprising:
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a metal substrate that retains the target material; and a metal thin film for sealing that seals the target material onto the metal substrate at a retention surface side holding the target material, the metal substrate comprising;
on the retention surface side,a frame portion; and an embossed structure comprising; a plurality of island portions surrounded by the frame portion, the island portions having the same height as the frame portion; and the rest comprising a recessed portion that is created by decreasing a thickness of a region other than the frame portion and the plurality of island portions by a thickness of the target material, wherein the metal thin film for sealing is used to seal the target material onto the recessed portion of the metal substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 12, 13, 14, 15, 16)
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8. A method for manufacturing a target for a neutron-generating device that generates neutrons by using a 7Li(p,n)7Be reaction while lithium as a target material is irradiated with proton beams accelerated by an accelerator, the method comprising:
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an embossed structure processing step of producing an embossed structure comprising;
on a retention surface side of a metal substrate holding the target material, a frame portion for sealing the target material;
a plurality of island portions that are surrounded by the frame portion and that have the same height as of the frame portion; and
a recessed portion that is created by decreasing a thickness of a region other than the island portions by a thickness of the target material;an attachment-promoting layer formation step of producing an attachment-promoting layer at a bottom of the recessed portion, the layer causing the target material to better attach to the metal substrate; a target material filling step of filling the recessed portion at the retention surface side with the molten target material, and thereafter; and a bonding step of bonding a metal thin film for sealing the target material to the recessed portion of the metal substrate onto surfaces of the frame portion and the island portions at the retention surface side by using hot isostearic pressing (HIP) bonding.
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9. A method for manufacturing a target for a neutron-generating device that generates neutrons by using a 7Li(p,n)7Be reaction while lithium as a target material is irradiated with proton beams accelerated by an accelerator, the method comprising:
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an embossed structure processing step of producing an embossed structure comprising;
on a retention surface side of a metal substrate holding the target material, a frame portion for sealing the target material;
a plurality of island portions that are surrounded by the frame portion and that have the same height as of the frame portion; and
a recessed portion that is created by decreasing a thickness of a region other than the island portions by a thickness of the target material;a bonding step of bonding a metal thin film for sealing the target material to the recessed portion of the metal substrate onto surfaces of the frame portion and the island portions at the retention surface side by using hot isostearic pressing (HIP) bonding; and a target material filling step comprising; heating the metal substrate after the bonding step to a first predetermined temperature at which the target material is melted; injecting the molten target material into the metal thin film-covered recessed portion of the metal substrate; keeping the target material at a second predetermined temperature equal to or less than the first predetermined temperature until contact surfaces between the target material and the metal thin film and between the target material and the metal substrate become sufficiently wet and have no gap; and filling the recessed portion of the metal substrate with the target material. - View Dependent Claims (10)
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11. A target for a neutron-generating device that generates neutrons by using a 7Li(p,n)7Be reaction while lithium as a target material is irradiated with proton beams accelerated by an accelerator, the target comprising:
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a metal substrate that retains the target material; and a metal thin film for sealing that seals the target material onto the metal substrate at a retention surface side holding the target material, wherein the target material is a lithium alloy comprising any of 1 to 20 mass % of Cu, 20 to 40 mass % of Al, and 45 to 60 mass % of Mg, and the remainder consisting of Li and unavoidable impurities.
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Specification