For Inertial Confinement Patents (Class 376/152)
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Patent number: 11488729Abstract: A confinement chamber for Inertial Confinement Fusion (ICF) may include a closed hohlraum and ICF target wherein the ICF target may comprise a central spherical fuel region, inner shell, outer fuel region, outer shell, and propellant region. A multitude of cylindrical beam channels may penetrate the entire thickness of the hohlraum. At the end of each cylindrical beam channel, where they exit the hohlraum, is a hemispherical cavity. Centered in the curvature of each cavity, and coaxial with each beam channel is a gold foam radiator. By layering materials or grading the density of a material in the propellant region of the closed hohlraum ICF target, the pressure profile on the outer shell may be tailored.Type: GrantFiled: March 4, 2021Date of Patent: November 1, 2022Assignee: INNOVEN ENERGY LLCInventors: Robert O. Hunter, Jr., Eric W. Cornell
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Patent number: 10438703Abstract: Fuel capsules usable in inertial confinement fusion (ICF) reactors have shells made from materials having a diamond (sp3) lattice structure, including diamond materials in synthetic crystalline, polycrystalline (ordered or disordered), nanocrystalline and amorphous forms. The interior of the shell is filled with a fusion fuel mixture, including any combination of deuterium and/or tritium and/or helium-3 and/or other fusible isotopes.Type: GrantFiled: September 23, 2015Date of Patent: October 8, 2019Assignee: SUNSHELL LLCInventor: Victor B. Kley
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Patent number: 10199127Abstract: Fuel pellets for use as targets in thermonuclear fusion by inertial confinement are manufactured from a solid palladium core that contains deuterium tritium gases. The palladium core is covered with a tamper-ablator shell of heavy metal selected from the group including gold, platinum, and tungsten.Type: GrantFiled: June 9, 2011Date of Patent: February 5, 2019Inventor: John E Stauffer
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Publication number: 20110261919Abstract: A method and system for achieving fusion is provided. The method includes providing laser source that generates a laser beam and a target that includes a capsule embedded in the target and filled with DT gas. The laser beam is directed at the target. The laser beam helps create an electron beam within the target. The electron beam heats the capsule, the DT gas, and the area surrounding the capsule. At a certain point equilibrium is reached. At the equilibrium point, the capsule implodes and generates enough pressure on the DT gas to ignite the DT gas and fuse the DT gas nuclei.Type: ApplicationFiled: April 23, 2010Publication date: October 27, 2011Applicant: Lawrence Livermore National Security, LLCInventors: Joseph A. Sefcik, Scott C. Wilks
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Publication number: 20040028167Abstract: An electromagnetic protection ASIC that includes a high transconductance FET switch array operatively arranged to momentarily short all lines of ingress/egress to ground when triggered by a nuclear event detector.Type: ApplicationFiled: October 29, 2002Publication date: February 12, 2004Inventors: William C. Singleton, Scott C. Willis
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Patent number: 6680993Abstract: A method of producing an isotope comprising directing electrons at a converting material coated with a coating material, the coating material having an atomic number of n, whereby interaction of the electrons with the converting material produces photons, and whereby the photons produced interact with the coating material to produce an isotope having an atomic number of n−1. In preferred embodiments, the converting material is Tungsten, the coating material having an atomic number of n is Radium-226, and the isotope having an atomic number of n−1 is Radium-225.Type: GrantFiled: November 29, 2000Date of Patent: January 20, 2004Inventors: Stanley Satz, Scott Schenter
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Publication number: 20030031285Abstract: The invention belongs to the field of the inertial confinement fusion (ICF), and more specifically it relates to the fuel, in particular to the target with condensed layers of the fuel and the method of its production. The invention enables formation of a transparent cryogenic layer from hydrogen isotopes, which retains its transparency when warmed up from 5K to 16-20K. To produce the above cryogenic layer inside micro spheres a method has been developed of rapid quenching of finely dispersed liquid state in the presence of the doping elements.Type: ApplicationFiled: July 29, 2002Publication date: February 13, 2003Inventors: Igor Evgenievich Osipov, Tatyana Petrovna Timasheva, Lev Sergeevich Yaguzhinsky, Elena Rostislavovna Koresheva, Oleg Nikolaevich Krokhin
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Patent number: 6418177Abstract: Fuel pellets for use as targets in a device employing thermonuclear fusion by inertial confinement (Laser fusion) are manufactured from high polymer hydrocarbons in which bound hydrogen has been replaced with tritium. The required polymer is prepared by polymerizing monomer(s) which contain carbon and tritium. The hollow pellets are filled with thermonuclear fuel, e.g., a mixture of deuterium-tritium. To improve the sphericity of the pellets and the uniformity of their wall thickness, manufacture of the pellets is contemplated in the near-zero gravity of space.Type: GrantFiled: February 26, 1997Date of Patent: July 9, 2002Inventors: John E Stauffer, John C. Stauffer
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Publication number: 20020057754Abstract: Fuel pellets for use as targets in a device employing thermonuclear fusion by inertial confinement (Laser fusion) are manufactured from high polymer hydrocarbons in which bound hydrogen has been replaced with tritium. The required polymer is prepared by polymerizing monomer(s) which contain carbon and tritium. The hollow pellets are filled with thermonuclear fuel, e.g., a mixture of deuterium-tritium. To improve the sphericity of the pellets and the uniformity of their wall thickness, manufacture of the pellets is contemplated in the near-zero gravity of space.Type: ApplicationFiled: February 26, 1997Publication date: May 16, 2002Inventors: JOHN E. STAUFFER, JOHN C. STAUFFER
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Patent number: 5430776Abstract: Fuel pellets for use as targets in a device employing thermonuclear fusion by inertial confinement (Laser fusion) are manufactured from high polymer hydrocarbons in which bound hydrogen has been replaced with tritium. The required polymer is prepared by polymerizing monomer(s) which contain carbon and tritium. The hollow pellets are filled with thermonuclear fuel, e.g., a mixture of deuterium-tritium. To improve the sphericity of the pellets and the uniformity of their wall thickness, manufacture of the pellets is contemplated in the near-zero gravity of space.Type: GrantFiled: August 16, 1993Date of Patent: July 4, 1995Inventors: J. Christian Stauffer, John E. Stauffer
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Patent number: 4876056Abstract: A method and an apparatus are provided for measuring the flow rate of a fluid in a duct, for example in an under-sea crude oil pipeline, in which samples of a radioactive tracer are injected, at intervals, into the duct and the passage of the samples of tracer detected by a scintillator. The tracer is generated by irradiating a large volume of a liquid obtained from the environment of the duct with a neutron source, so that the sample has been irradiated for a prolonged period prior to injection.Type: GrantFiled: November 9, 1987Date of Patent: October 24, 1989Assignee: United Kingdom Atomic Energy AuthorityInventors: Colin G. Clayton, Ramon Spackman
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Patent number: 4874596Abstract: An apparatus and method for reacting on material by means of intense radiation employed to change the physical and, in certain instances, the chemical characteristics of such material. In one form, an intense radiation beam is directed into a cavity of a die or support for a small quantity of material to be reacted on and the intense heat of the beam as well as the shock wave generated in the material in the die cavity by the rapid heat of the beam react on such material to change its physical characteristics. In another form, two or more intense radiation beams, such as generated by one or more lasers or electron guns as intense pulses of radiation, are directed against a particle or pellet of material directed along a predetermined path into a reaction chamber, intensely heat and transmit shock wave energy thereto from opposite directions which shock waves collapse against the material transforming it into another form.Type: GrantFiled: June 28, 1984Date of Patent: October 17, 1989Inventor: Jerome H. Lemelson
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Patent number: 4790735Abstract: A system for obtaining spherically symmetrical implosion of sample materials by directing radiant ignition energy onto a target which includes a spherically symmetrical core of selected sample material concentrically surrounded by a shell of high explosive material. The resulting implosive compression produces hydrodynamically controlled physical and/or chemical and/or metallurgical transformations of state in the sample material.Type: GrantFiled: October 14, 1986Date of Patent: December 13, 1988Assignee: KMS Fusion, Inc.Inventor: Frederick J. Mayer
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Patent number: 4735762Abstract: A high-power-density laser or charged-particle-beam fusion reactor system maximizes the directed kinetic energy imparted to a large mass of liquid lithium by a centrally located fusion target. A fusion target is embedded in a large mass of lithium, of sufficient radius to act as a tritium breeding blanket, and provided with ports for the access of beam energy to implode the target. The directed kinetic energy is converted directly to electricity with high efficiency by work done against a pulsed magnetic field applied exterior to the lithium. Because the system maximizes the blanket thickness per unit volume of lithium, neutron-induced radioactivities in the reaction chamber wall are several orders of magnitude less than is typical of other fusion reactor systems.Type: GrantFiled: February 20, 1987Date of Patent: April 5, 1988Assignee: The United States of America as represented by the United States Department of EnergyInventor: George P. Lasche
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Patent number: 4693938Abstract: A uniform cryogenic layer of DT fuel is maintained in a fusion target having a low density, small pore size, low Z rigid foam shell saturated with liquid DT fuel. Capillary action prevents gravitational slumping of the fuel layer. The saturated shell may be cooled to produce a solid fuel layer.Type: GrantFiled: November 7, 1986Date of Patent: September 15, 1987Assignee: The United States of America as represented by the United States Department of EnergyInventor: Dale H. Darling
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Patent number: 4687618Abstract: A laser target comprising a thermonuclear fuel capsule composed of a centrally located quantity of fuel surrounded by at least one or more layers or shells of material for forming an atmosphere around the capsule by a low energy laser prepulse. The fuel may be formed as a solid core or hollow shell, and, under certain applications, a pusher-layer or shell is located intermediate the fuel and the atmosphere forming material. The fuel is ignited by symmetrical implosion via energy produced by a laser, or other energy sources such as an electron beam machine or ion beam machine, whereby thermonuclear burn of the fuel capsule creates energy for applications such as generation of electricity via a laser fusion reactor.Type: GrantFiled: September 2, 1975Date of Patent: August 18, 1987Assignee: The United States of America as represented by the United States Department of EnergyInventors: John H. Nuckolls, Albert R. Thiessen
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Patent number: 4671994Abstract: Fiber reinforced hollow film forming material microspheres 17 made from a fiber and film forming material composition are described. The fiber reinforced hollow microspheres 17 are used to make shaped and molded articles and to make insulation materials. The fibers can be made from ceramic materials, glass, metal, metal glass and plastic. The reinforcing fibers can be one-half to five microns in diameter and five to one hundred microns in length.Type: GrantFiled: February 10, 1986Date of Patent: June 9, 1987Assignee: Materials Technology CorporationInventor: Joe K. Cochran, Jr.
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Patent number: 4634567Abstract: A method of fabricating multishell fuel targets for inertial confinement fusion usage. Sacrificial hemispherical molds encapsulate a concentric fuel pellet which is positioned by fiber nets stretched tautly across each hemispherical mold section. The fiber ends of the net protrude outwardly beyond the mold surfaces. The joint between the sacrificial hemispheres is smoothed. A ceramic or glass cover is then deposited about the finished mold surfaces to produce an inner spherical surface having continuously smooth surface configuration. The sacrificial mold is removed by gaseous reactions accomplished through the porous ceramic cover prior to enclosing of the outer sphere by addition of an outer coating. The multishell target comprises the inner fuel pellet concentrically arranged within a surrounding coated cover or shell by fiber nets imbedded within the cover material.Type: GrantFiled: August 10, 1983Date of Patent: January 6, 1987Assignee: The United States of America as represented by the United States Department of EnergyInventors: James R. Holland, Robert M. Del Vecchio
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Patent number: 4608222Abstract: A method of achieving the controlled release of thermonuclear energy by illuminating a minute, solid density, hollow shell of a mixture of material such as deuterium and tritium with a high intensity, uniformly converging laser wave to effect an extremely rapid build-up of energy in inwardly traveling shock waves to implode the shell creating thermonuclear conditions causing a reaction of deuterons and tritons and a resultant high energy thermonuclear burn. Utilizing the resulting energy as a thermal source and to breed tritium or plutonium.Type: GrantFiled: July 10, 1973Date of Patent: August 26, 1986Assignee: KMS Fusion, Inc.Inventor: Keith A. Brueckner
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Patent number: 4569819Abstract: A spherical underground cavity is filled with saturated steam or a mixture of saturated steam and coal dust in which a nuclear device is detonated to provide the source of energy. The energy thus released heats the saturated steam to produce superheated steam used to generate power. If coal dust is mixed with the saturated steam in the correct ratio, the rise in temperature caused by the nuclear explosion initiates a chemical reaction between the steam and the coal to produce carbon monoxide and hydrogen. The mixture of carbon monoxide and hydrogen can be used as fuel in an external power plant. The carbon monoxide and the hydrogen gases can also be separated for use as fuels or for industrial applications. The wall of the spherical underground cavity is isolated from the shock wave created by the nuclear explosion in the ambient saturated steam by a segmented steel shell. Each segments is supported by a shock absorbing mechanism attached to the rocks in which the cavity is embedded.Type: GrantFiled: March 6, 1984Date of Patent: February 11, 1986Inventor: Constant V. David
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Patent number: 4544520Abstract: The disclosure is directed to a laser target structure and its method of fabrication. The target structure comprises a target plate containing an orifice across which a pair of crosshairs are affixed. A microsphere is affixed to the crosshairs and enclosed by at least one hollow shell comprising two hemispheres attached together and to the crosshairs so that the microsphere is juxtapositioned at the center of the shell.Type: GrantFiled: July 25, 1978Date of Patent: October 1, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: Eugene H. Farnum, R. Jay Fries
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Patent number: 4525323Abstract: A target for implosion by ion beams composed of a spherical shell of frozen DT surrounded by a low-density, low-Z pusher shell seeded with high-Z material, and a high-density tamper shell. The target has various applications in the inertial confinement technology. For certain applications, if desired, a low-density absorber shell may be positioned intermediate the pusher and tamper shells.Type: GrantFiled: August 4, 1977Date of Patent: June 25, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: Roger O. Bangerter, Donald J. Meeker
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Patent number: 4477958Abstract: A method of fabricating multishell fuel targets for inertial confinement fusion usage. Sacrificial hemispherical molds encapsulate a concentric fuel pellet which is positioned by fiber nets stretched tautly across each hemispherical mold section. The fiber ends of the net protrude outwardly beyond the mold surfaces. The joint between the sacrificial hemispheres is smoothed. A ceramic or glass cover is then deposited about the finished mold surfaces to produce an inner spherical surface having continuously smooth surface configuration. The sacrificial mold is removed by gaseous reaction accomplished through the porous ceramic cover prior to enclosing of the outer sphere by addition of an outer coating. The multishell target comprises the inner fuel pellet concentrically arranged within a surrounding coated cover or shell by fiber nets imbedded within the cover material.Type: GrantFiled: June 1, 1981Date of Patent: October 23, 1984Assignee: The United States of America as represented by the United States Department of EnergyInventors: James R. Holland, Robert M. Del Vecchio
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Patent number: 4464413Abstract: An improved method and apparatus are given for producing cryogenic inertially driven fusion targets in the fast isothermal freezing (FIF) method. Improved coupling efficiency and greater availability of volume near the target for diagnostic purposes and for fusion driver beam propagation result. Other embodiments include a new electrical switch and a new explosive detonator, all embodiments making use of a purposeful heating by means of optical fibers.Type: GrantFiled: August 28, 1981Date of Patent: August 7, 1984Assignee: The United States of America as represented by the United States Department of EnergyInventors: James T. Murphy, John R. Miller
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Patent number: 4455276Abstract: Electrically chargeable laser targets and method for forming such charged targets in order to improve their guidance along a predetermined desired trajectory. This is accomplished by the incorporation of a small amount of an additive to the target material which will increase the electrical conductivity thereof, and thereby enhance the charge placed upon the target material for guidance thereof by electrostatic or magnetic steering mechanisms, without adversely affecting the target when illuminated by laser energy.Type: GrantFiled: September 19, 1978Date of Patent: June 19, 1984Assignee: The United States of America as represented by the United States Department of EnergyInventors: Ronald K. Goodman, Angus L. Hunt
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Patent number: 4448743Abstract: Improved generation, insulated confinement and heating of ultra-high temperature steady-state plasmas in such devices as the optical plasmotron of Raizer and the freely floating plasma filament of Kapitza wherein the temperature of the plasma is increased by increasing the static pressure of the ambient medium (or decreasing the frequency of the radiant energy supply) while increasing the radiant energy supply's power and wherein the relationships between the ambient pressure, the amount of initially projected ionizing energy, the focal spot radius of this initial energy, the wavelength of the radiant energy supply, the transparency of the plasma, the rate of bremmstrahlung radiation energy losses, the power of the radiant energy supply and the ratio of the static pressure increase (or frequency decrease) are so optimized as to enable attainment of plasma temperatures more than an order of magnitude greater than hitherto attainable by any process of such a type.Type: GrantFiled: October 15, 1979Date of Patent: May 15, 1984Assignee: Applied Fusion Research CorporationInventor: Robert W. Bass
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Patent number: 4432933Abstract: In processes utilizing a source of laser energy for achieving a thermonuclear fusion reaction, it is necessary to have fusion fuel prepared in a configuration with minute dimensions and the present invention contemplates preparing this fuel by introducing into hollow microspheres (typically comprised of glass) of predetermined size, in the range of 250 to 2,000 micrometers, a gaseous thermonuclear fuel. One way of accomplishing this is to cause diffusion of gaseous thermonuclear fuel through the walls of the microsphere under conditions of suitable temperature and pressure so that it may be achieved in a reasonable time, after which the fuel can be frozen out on the walls of the microsphere to provide a fusion fuel in a hollow spherical shape. Suitable coatings of additional materials may be applied to the fueled microsphere by appropriate coating methods to complete complex thermonuclear fuel pellet configurations.Type: GrantFiled: April 9, 1976Date of Patent: February 21, 1984Assignee: KMS Fusion, Inc.Inventors: Robert J. Teitel, David E. Solomon
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Patent number: 4390567Abstract: Very smooth polymeric coatings or films graded in atomic number and density can readily be formed by first preparing the coating or film from the desired monomeric material and then contacting it with a fluid containing a metal or a mixture of metals for a time sufficient for such metal or metals to sorb and diffuse into the coating or film. Metal resinate solutions are particularly advantageous for this purpose. A metallic coating can in turn be produced on the metal-loaded film or coating by exposing it to a low pressure plasma of air, oxygen, or nitrous oxide. The process permits a metallic coating to be formed on a heat sensitive substrate without the use of elevated temperatures.Type: GrantFiled: March 11, 1981Date of Patent: June 28, 1983Assignee: The United States of America as represented by the United States Department of EnergyInventor: Raimond Liepins
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Patent number: 4380855Abstract: Hollow shell laser fusion targets, such as glass microballoons, are filled with gases of the type which do not permeate through the wall of the balloon. A hole is laser-drilled in the balloon, a plug is placed over the hole and gas is introduced into the balloon through the loosely plugged hole. Thereafter the plug is melted to form a seal over the hole, entrapping the gas within the target. The plug is, for example, a polymer such as highly crystalline polystyrene, or glass.Type: GrantFiled: January 18, 1980Date of Patent: April 26, 1983Assignee: University of RochesterInventors: Harry W. Deckman, Gerald M. Halpern, John G. Dunsmuir
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Patent number: 4376752Abstract: Foam encapsulated laser-fusion targets wherein a quantity of thermonuclear fuel is embedded in low density, microcellular foam which serves as an electron conduction channel for symmetrical implosion of the fuel by illumination of the target by one or more laser beams. The fuel, such as DT, is contained within a hollow shell constructed of glass, for example, with the foam having a cell size of preferably no greater than 2 .mu.m, a density of 0.065 to 0.6.times.10.sup.3 kg/m.sup.3, and external diameter of less than 200 .mu.m.Type: GrantFiled: September 2, 1975Date of Patent: March 15, 1983Assignee: The United States of America as represented by the United States Department of EnergyInventors: John H. Nuckolls, Albert R. Thiessen, Glen H. Dahlbacka
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Patent number: 4341730Abstract: This invention relates to and comprises materials for fuel elements, and optical and electromagnetic equipment for ignition and maintenance of controlled fusion processes, for use in powering engines and as an energy source for driving electrical generators for electric power stations. Characteristics for commercial development are described. An approach for intensifying the heat of gas flames is also indicated.Type: GrantFiled: May 12, 1980Date of Patent: July 27, 1982Inventor: Henry B. Maier
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Patent number: 4323420Abstract: An ICF target comprising a spherical pellet of fusion fuel surrounded by a concentric shell; and a process for manufacturing the same which includes the steps of forming hemispheric shells of a silicon or other substrate material, adhering the shell segments to each other with a fuel pellet contained concentrically therein, then separating the individual targets from the parent substrate. Formation of hemispheric cavities by deposition or coating of a mold substrate is also described. Coatings or membranes may also be applied to the interior of the hemispheric segments prior to joining.Type: GrantFiled: July 17, 1978Date of Patent: April 6, 1982Assignee: The United States of America as represented by the United States Department of EnergyInventors: Nino A. Masnari, Walter B. Rensel, Merrill G. Robinson, David E. Solomon, Kensall D. Wise, Gilbert H. Wuttke
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Patent number: 4304627Abstract: A piston is moved by a laser incited fusion reaction such as deuterium-tritium (D-T) to thereby produce an expandable fusion chamber. When a gaseous substance such as CO.sub.2 is presented in the presence of the fusion reaction, it is dissociated into CO and O.sub.2 component mixture and the expansion of the chamber rapidly cools the mixture and quenches the back reaction thereby producing a greater CO yield. Also the piston produces peripheral power from the fusion reaction in the form of mechanical energy.Type: GrantFiled: September 28, 1978Date of Patent: December 8, 1981Assignee: Texas Gas Transmission CorporationInventor: John G. Lewis
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Patent number: 4303731Abstract: A method for compressing gases in a contained volume consisting of hollow glass microspheres is described. The gases are compressed under high pressure and can be easily handled and stored. The gases to be compressed and contained in the microspheres are used as blowing gases to blow the microspheres.The metal vapor deposited coating can be reflective of or transparent to visible light.The hollow glass microspheres can be made to contain a thin transparent or reflective metal coating deposited on the inner wall surface of the microspheres by adding to the blowing gas small dispersed metal particles and/or gases of organo metal compounds and decomposing the organo metal compounds.The hollow glass microspheres can be made in the form of filamented glass microspheres with a thin glass filament connecting adjacent glass microspheres.Type: GrantFiled: December 13, 1979Date of Patent: December 1, 1981Inventor: Leonard B. Torobin
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Patent number: 4297165Abstract: In connection with a fusion process which can be initiated by a high energy input such as a laser beam, the use of a layer of uranium surrounding the fusion fuel such as deuterium-tritium or a non-cryogenic fuel such as lithium deuterium-lithium tritium. The uranium serves as a tamper layer to contain the fusion fuel and supplement the heating by a fission reaction which not only increases the fusion yield but increases the time of disassembly, thus materially increasing the efficiency of the fusion system.Type: GrantFiled: July 13, 1970Date of Patent: October 27, 1981Assignee: KMS Fusion, Inc.Inventor: Keith A. Breuckner
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Patent number: H446Abstract: A method of controlling the reaction rates of the fuel atoms in a fusion reactor comprises the step of polarizing the nuclei of the fuel atoms in a particular direction relative to the plasma confining magnetic field. Fusion reaction rates can be increased or decreased, and the direction of emission of the reaction products can be controlled, depending on the choice of polarization direction.Type: GrantFiled: April 11, 1986Date of Patent: March 1, 1988Assignee: The United States of America as represented by the United States Department of EnergyInventors: Russell M. Kulsrud, Harold P. Furth, Ernest J. Valeo, Maurice Goldhaber