Method, apparatus, and system to reduce neutron production in small clean fusion reactors

Patent metadata

Field	Value
Publication number	US-9767925-B2
Application number	US-201314387475-A
Country	US
Kind code	B2
Filing date	Mar 25, 2013
Priority date	Mar 23, 2012
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

The invention is for a system and method to reduce neutron production from a deuterium-helium-3 (D- 3 He) fueled, steady-state, small nuclear fusion reactor. The reactor employs a field-reversed configuration (FRC) magnetic confinement scheme and an odd-parity rotating magnetic field (RMF o ) that produces periodic, co-streaming, energetic ion beams which heat the plasma. This is accomplished through radio-frequency (RF) heating, which can effectively heat and maintain the plasma. Use of this method will lessen damage to and activation of reactor components and, in doing so, can advance the development of fusion reactors for electrical, power and propulsion applications by alleviating the need for both nuclear-materials and tritium-breeding-technology testing programs.

First claim

The invention claimed is:

1. A field reversed magnetic field configuration fusion reactor system comprising:
a reactor chamber in a field reversed magnetic field configuration;
a gas injection system for injecting deuterium and helium-3 fuel into the reactor chamber for fusion reactions;
a plurality of radio frequency (RF) antennae configured to generate an odd-parity rotating magnetic field capable of causing a plasma to heat to a temperature sufficient to cause fuel ions to fuse to produce fusion products;
a plurality of superconducting flux coils around the reactor chamber in which an induced current is generated in response to the odd-parity rotating magnetic field, wherein the induced current generates a magnetic confinement field that magnetically confines the plasma; and
a direct energy conversion system that is configured to extract energy from the fusion products, resulting from fusion reactions in the plasma, that pass through a scrape-off layer.

2. The system of claim 1 , wherein power is extracted from Bremsstrahlung radiation and synchrotron radiation generated by the fusion reactions using a heat engine and high temperature heat exchangers.

3. The system of claim 1 , wherein the scrape-off layer is configured to allow the fusion products resulting from fusion reactions to pass through before the energy from the fusion products is extracted in the direct energy conversion system.

Assignees

• Univ Princeton

Inventors

• Cohen Samuel A

Classifications

• G21B1/052 Primary

  reversed field configuration · CPC title

• Y02E30/122

  Cross-Sectional Technologies · mapped topic

• Y02E30/10

  Nuclear fusion reactors · CPC title