Lawrence Livermore National Security, LLC

University of California

The United States of America As Represented by the United States

Fisk University

The United States of America As Represented by the Department of Energy

Current Lighting Solutions, LLC

Other

General Electric Company

National Technology & Engineering Solutions of Sandia, LLC

Schott Glass Technologies, Inc.

Ludlum Measurements, Inc.

Stephen Anthony Payne

Nerine Jane Cherepy

Raymond John Beach

William F Krupke

Natalia P Zaitseva

M Leslie Carman

Eric C Honea

Zachary M Seeley

Andrew M Glenn

Ralph Henry Page

Arnold Burger

Wolfgang Stoeffl

Adam M Conway

Rebecca J Nikolic

Art J Nelson

Alok Mani Srivastava

Joshua D Kuntz

Lars F Voss

Jay Walter Dawson

Benjamin Rupert

Kathleen I Schaffers

Andrew Neil Mabe

Camille Bibeau

Benjamin W Sturm

Alexander D Drobshoff

Christopher D Marshall

Laura D DeLoach

Giulia E Hull

Sebastien Hamel

Eric B Duoss

William Winder Beers

Joseph S Hayden

William Erwin Cohen

Cheng Zhu

Christopher Allen Ebbers

Robert T Graff

Howard T Powell

Erik Lars Swanberg, Jr

Scott Mitchell

H Paul Martinez

Joel Speth

Owen B Drury

Dennis Maderas

John Lang

Lloyd L Chase

Ross Allen Osborne

Ivy Krystal Jones

Michelle A Faust

Mark S Andreaco

Matthias J Schmand

Michael Dale Perry

Peter Carl Cohen

Thomas M Tillotson

Peter G Schunemann

Jeffery James Roberts

Nicholas Richard Myllenbeck

Robert Dean Sanner

Barry L Freitas

Michael D Feit

Luis E Zapata

Ian P Mercer

Russell B Wilcox

Hadong Kim

Jay A Skidmore

Steven B Sutton

Andy Bayramian

Bruce H Chai

Yuiko T Hayden

John H Campbell

James E Murray

Melanie L Elder

Michael C Nostrand

Herbert W Newkirk

Wolfgang Hackenberg

Deanna M Pennington

Christian Pedrini

Kyle Ray Shipp

Terence C O'Brien

Charles R Hurlbut

Patrick R Beck

John P Wooldridge

Mark A Emanuel

Robert Hatarik

Wayne L Kway

Larry K Smith

Mary Kay Aston

Krishna C Mandal

Douglas A Keszler

Zhi Ming Liao

Domenico Bonaccini Calia

Luke Taylor

Russel B Wilcox

Iwona A Pawelczak

Karen L Jentes

Steven T Mills

Keith E Lewis

Patricia C Payne

The present disclosure relates to a lighting component which may comprise a light emitting diode (LED) or laser diode (LD) for generating at least one of blue light or ultraviolet light. A fluoride phosphor matrix may be included, which may be consolidated into a phosphor ceramic structure including at least one of a transparent fluoride ceramic structure or a translucent fluoride ceramic structure, and positioned adjacent to the LED or LD. The phosphor ceramic structure generates at least one of red or orange light when irradiated by the light emitted from the LED or LD. The phosphor ceramic structure exhibits reduced thermal quenching relative to a fluoride particulate structure irradiated by the LED or LD.

Systems and methods for fluoride ceramic phosphors for LED lighting

In one aspect, a composition of matter includes: a plurality of particles in a thixotropic suspension to form an ink, where the plurality of particles are present in an amount of at least about 20 vol %, and the plurality of particles include: a first host medium material containing at least one of: one or more lasing species dopants; and one or more other dopant species; and a second host medium material containing at least one other dopant species. The composition of matter further includes a liquid phase present in an amount greater than 20 vol % and less than about 80 vol %, where the liquid phase comprises at least one of: at least one surfactant; at least one polar organic solvent; and at least one binder.

Laser gain media fabricated via direct ink writing (DIW) and ceramic processing

Scintillating plastics resistant to crazing and fogging, methods of making and using the same are disclosed. The scintillating plastics include: one or more primary polymers present in an amount ranging from about 40 wt % to about 95 wt %; one or more secondary polymers present in an amount ranging from about 1 wt % to about 60 wt %; and one or more fluors present in an amount ranging from about 0.1 wt % to about 50 wt %. Methods of making such plastics include: creating a homogenous mixture of precursor materials including primary polymer, secondary polymer, and fluor in the amounts set forth above; and polymerizing the homogenous mixture. Methods of using such plastics include: exposing the scintillating plastic to one or more extreme environmental conditions for a predetermined amount of time without generating crazing or fogging within the scintillating plastic. Various additional features and specific embodiments of these inventive concepts are also disclosed.

Defect-resistant plastic scintillation radiation detector compositions and fabrication methods

A plastic scintillator includes a polymer matrix, an aliphatic additive present in the polymer matrix in an effective amount to impart fog resistance to the plastic scintillator, and at least one fluorescent dye in the polymer matrix, the dye being effective to provide scintillation upon exposure to radiation. The effective amount of the aliphatic additive is in a range of greater than 0 weight percent up to 5 weight percent relative to the total weight of the plastic scintillator. Moreover, the aliphatic additive has a structure comprising up to 300 repeat units.

Defect-resistant plastic scintillators with aliphatic additives

A transparent ceramic optic includes: a lasing region comprising at least one lasing species dopant; and a transparent region transparent to light generated by the lasing species. At least the transparent region is doped with at least one other dopant species such that the lasing region and the transparent region are characterized by a difference in refractive index between the two regions in an amount of about 1.0&#xd7;10or less. Inventive formulations of inks suitable for fabricating transparent ceramic optics having desirable compositional characteristics such as concentration gradients in desired spatial arrangements, e.g. using additive manufacturing techniques such as direct ink writing and/or extrusion freeform fabrication are also disclosed, along with suitable techniques for forming the transparent ceramic optics from such inks.

In one embodiment, a scintillator material includes a polymer matrix; and a primary dye in the polymer matrix, the primary dye being a fluorescent dye, the primary dye being present in an amount of 5 wt % or more; wherein the scintillator material exhibits an optical response signature for neutrons that is different than an optical response signature for gamma rays. In another embodiment, a scintillator material includes a polymer matrix comprising at least one of: polyvinyl xylene (PVX); polyvinyl diphenyl; and polyvinyl tetrahydronaphthalene; and a primary dye in the polymer matrix, the primary dye being a fluorescent dye, the primary dye being present in an amount greater than 10 wt %. A total loading of dye in the scintillator material is sufficient to cause the scintillator material to exhibit a pulse-shape discrimination (PSD) figure of merit (FOM) of about at least 2.0.

Plastic scintillator with effective pulse shape discrimination for neutron and gamma detection

According to one embodiment, a scintillator includes a host material having the chemical formula: ABX, where A includes a monovalent ion, B includes a tetravalent ion, and X includes a halide ion.

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In various approaches room-temperature gamma detector longevity may be improved by selectively removing, or selectively incorporating, alternate halogen component(s) from select surfaces of the detector. According to one embodiment, a method of improving operational longevity of a thallium bromide (TlBr)-based detector includes: selectively treating one or more surfaces of the TlBr-based detector to produce a surface substantially comprising pure TlBr. Similar techniques may be employed to restore a degraded or failed detector. According to another embodiment, a method of forming a TlBr-based detector exhibiting improved operational longevity includes: selectively treating one or more surfaces of the TlBr-based detector to replace Br therein with one or more alternate halogen components while also substantially avoiding replacing some or all of the Br in other surfaces of the TlBr-based detector with the one or more alternate halogen components. Corresponding structures for TlBr-based detectors with improved longevity are also described.

Selective surface treatment of thallium bromide (TLBR)-based detectors to improve longevity and/or restore operational capacity thereof

In one embodiment, a method includes forming a powder having a composition with the formula: ABCO, where h is 3&#xb1;10%, i is 2&#xb1;10%, j is 3&#xb1;10%, A includes one or more rare earth elements, B includes aluminum and/or gallium, and C includes aluminum and/or gallium. The method additionally includes consolidating the powder to form an optically transparent ceramic, and applying at least one thermodynamic process condition during the consolidating to reduce oxygen and/or thermodynamically reversible defects in the ceramic. In another embodiment, a scintillator includes (GdY)(GaAl)OD, where a is from about 0.05-2, b is from about 1-3, x is from about 2.8-3.2, y is from about 4.8-5.2, c is from about 0.003-0.3, and D is a dopant, and where the scintillator is an optically transparent ceramic scintillator having physical characteristics of being formed from a ceramic powder consolidated in oxidizing atmospheres.

Transparent ceramic garnet scintillator detector for positron emission tomography

A combination of doping, rapid pulsed optical and/or thermal annealing, and unique detector structure reduces or eliminates sources of electronic noise in a CdZnTe (CZT) detector. According to several embodiments, methods of forming a detector exhibiting minimal electronic noise include: pulse-annealing at least one surface of a detector comprising CZT for one or more pulses, each pulse having a duration of &#x2dc;0.1 seconds or less. The at least one surface may optionally be ion-implanted. In another embodiment, a CZT detector includes a detector surface with two or more electrodes operating at different electric potentials and coupled to the detector surface; and one or more ion-implanted CZT surfaces on or in the detector surface, each of the one or more ion-implanted CZT surfaces being independently connected to one of the two or more electrodes and the surface of the detector. At least two of the ion-implanted surfaces are in electrical contact.

Rapid pulse annealing of CdZnTe detectors for reducing electronic noise

A scintillator material according to one embodiment includes a polymer matrix; a primary dye in the polymer matrix, the primary dye being a fluorescent dye, the primary dye being present in an amount of 3 wt % or more; and at least one component in the polymer matrix, the component being selected from a group consisting of B, Li, Gd, a B-containing compound, a Li-containing compound and a Gd-containing compound, wherein the scintillator material exhibits an optical response signature for thermal neutrons that is different than an optical response signature for fast neutrons and gamma rays. A system according to one embodiment includes a scintillator material as disclosed herein and a photodetector for detecting the response of the material to fast neutron, thermal neutron and gamma ray irradiation.

System and plastic scintillator for discrimination of thermal neutron, fast neutron, and gamma radiation

In one embodiment, a material comprises a crystal comprising strontium iodide providing at least 50,000 photons per MeV, where the strontium iodide material is characterized by a volume not less than 1 cm. In another embodiment, a scintillator optic includes europium-doped strontium iodide providing at least 50,000 photons per MeV, where the europium in the crystal is primarily Eu, and the europium is present in an amount greater than about 1.6%. A scintillator radiation detector in yet another embodiment includes a scintillator optic comprising SrIand BaI, where a ratio of SrIto BaIis in a range of between 0:1 and 1.0, the scintillator optic is a crystal that provides at least 50,000 scintillation photons per MeV and energy resolution of less than about 5% at 662 keV, and the crystal has a volume of 1 cmor more; the scintillator optic contains more than about 2% europium.

Barium iodide and strontium iodide crystals and scintillators implementing the same

In one embodiment, a crystal includes at least one metal halide; and an activator dopant comprising ytterbium. In another general embodiment, a scintillator optic includes: at least one metal halide doped with a plurality of activators, the plurality of activators comprising: a first activator comprising europium, and a second activator comprising ytterbium. In yet another general embodiment, a method for manufacturing a crystal suitable for use in a scintillator includes mixing one or more salts with a source of at least one dopant activator comprising ytterbium; heating the mixture above a melting point of the salt(s); and cooling the heated mixture to a temperature below the melting point of the salts. Additional materials, systems, and methods are presented.

Growing community of inventors

Castro Valley, CA, United States of America

Stephen Anthony Payne