Ion generation composite target and laser-driven ion acceleration apparatus using the same

Patent metadata

Field	Value
Publication number	US-11011340-B2
Application number	US-201916687822-A
Country	US
Kind code	B2
Filing date	Nov 19, 2019
Priority date	Jul 29, 2019
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

The present invention relates to an ion generation composite target for an ion irradiation technology including: a substrate having a through hole formed thereon; and a graphene thin film configured on the substrate, across the through hole, having a thickness in a range between 1 nm to 3 nm, and ionized to release a proton or a carbon ion.

First claim

What is claimed is:

1. An ion generation composite target ionized to release a proton or a carbon ion for an ion irradiation technology, comprising:
a substrate having a through hole formed thereon;
a plurality of layers of a graphene thin film configured on the substrate as a scaffold for supporting at least one thin film, across the through hole, and each of the plurality of layers of the graphene thin film having a thickness in a range between 1 nm to 3 nm; and
the at least one thin film being either a carbon-based thin film having a thickness less than 20 nm, a hydrocarbon-based thin film having a thickness less than 20 nm, or a metallic material thin film having a thickness in a range between 1 nm to 4 nm, configured with the plurality of layers of the graphene thin film and across the through hole,
wherein the carbon-based thin film is one selected from an acrylic thin film, a PMMA thin film, a plastic thin film, and an organic polymer thin film, the hydrocarbon-based thin film is one selected from an acrylic thin film, a PMMA thin film, a plastic thin film, and an organic polymer thin film, and the metallic material thin film is one selected from a precious metal thin film, a gold thin film, and a copper foil.

2. The ion generation composite target as claimed in claim 1 , wherein the ion generation composite target is manufactured by implementing one selected from a rapid-thermal chemical vapor deposition scheme, a vapor deposition scheme, a rapid thermal anneal scheme, an atomic layer deposition scheme, a spin coating scheme, an electrolysis bubble scheme, a wet transfer scheme, a dry transfer scheme, and a combination thereof.

3. The ion generation composite target as claimed in claim 1 , wherein the ion irradiation technology is one selected from a laser-driven ion acceleration technology, an ion irradiation medical technology, a cancer irradiation therapy technology, a high resolution irradiation imaging technology, a fusion ignition technology, an energetic particle irradiation technology, and a laboratory astrophysics technology.

4. A laser-driven ion acceleration apparatus, comprising:
a laser emitting a laser beam; and
a composite target ionized to release a proton or a carbon ion and comprising:
a substrate having a through hole providing for the laser beam to pass through;
a plurality of layers of a graphene thin film configured on the substrate as a scaffold for supporting at least one thin film, across the through hole, and each of the plurality of layers of the graphene thin film having a thickness in a range between 1 nm to 3 nm; and
the at least one thin film being either a carbon-based thin film having a thickness less than 20 nm, a hydrocarbon-based thin film having a thickness less than 20 nm, or a metallic material thin film having a thickness in a range between 1 nm to 4 nm, configured with the plurality of layers of the graphene thin film and across the through hole,

wherein the carbon-based thin film is one selected from an acrylic thin film, a PMMA thin film, a plastic thin film, and an organic polymer thin film, the hydrocarbon-based thin film is one selected from an acrylic thin film, a PMMA thin film, a plastic thin film, and an organic polymer thin film, and the metallic material thin film is one selected from a precious metal thin film, a gold thin film, and a copper foil.

5. The laser-driven ion acceleration apparatus as claimed in claim 4 , wherein the composite target is configured to use one of the plurality of layers of the graphene thin film as a front side facing toward the laser beam, the composite target is configured to use the carbon-based thin film as a front side facing toward the laser beam, the composite target is configured to use the hydrocarbon-based thin film as a front side facing toward the laser beam, or the composite target is configured to use the metallic material thin film as a front side facing toward the laser beam.

6. The laser-driven ion acceleration apparatus as claimed in claim 5 , wherein the front side has a normal line which is angled with the laser beam in range between 0° degree to 60° degree.

Assignees

• Univ Nat Central

Inventors

• Woon Wei-Yen
• Yasuhiro Kuramitsu

Classifications

• H05H6/00

  Targets for producing nuclear reactions (supports for targets or objects to be irradiated G21K5/08 {; preparation of tritium C01B4/00; targets, e.g. pellets for fusion reactions by laser or charged particles beam injection H05H1/22}) · CPC title

• H01J27/24 Primary

  using photo-ionisation, e.g. using laser beam · CPC title

• H01J27/022

  Details · CPC title

• H05H15/00

  Methods or devices for acceleration of charged particles not otherwise provided for {, e.g. wakefield accelerators} · CPC title