Patents by Inventor M. Leslie Carman
M. Leslie Carman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11725137Abstract: 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.Type: GrantFiled: April 29, 2021Date of Patent: August 15, 2023Assignees: Lawrence Livermore National Security, LLC, Ludlum Measurements, Inc., National Technology & Engineering Solutions of Sandia, LLCInventors: Andrew Neil Mabe, M Leslie Carman, Stephen Anthony Payne, Natalia P. Zaitseva, Charles R. Hurlbut, Terence C. O'Brien, Kyle Ray Shipp, Nicholas Richard Myllenbeck
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Publication number: 20210340437Abstract: 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.Type: ApplicationFiled: April 29, 2021Publication date: November 4, 2021Applicants: Lawrence Livermore National Security, LLC, National Technology & Engineering Solutions of Sandia, LLC, Ludlum Measurements, Inc., National Technology & Engineering Solutions of Sandia, LLCInventors: Andrew Neil Mabe, M Leslie Carman, Stephen Anthony Payne, Natalia P. Zaitseva, Charles R. Hurlbut, Terence C. O'Brien, Kyle Ray Shipp, Nicholas Richard Myllenbeck
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Publication number: 20210317364Abstract: A scintillator material includes a polymer matrix, a primary dye in the polymer matrix, the primary dye being a fluorescent dye; a secondary dye, and a Li-containing compound in the polymer matrix, where the Li-containing compound is a Li salt of a short-chain aliphatic acid. In addition, the scintillator material exhibits an optical response signature for thermal neutrons that is different than an optical response signature for fast neutrons.Type: ApplicationFiled: April 8, 2021Publication date: October 14, 2021Inventors: Natalia P. Zaitseva, M Leslie Carman, Andrew M. Glenn, Andrew Neil Mabe
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Publication number: 20200224087Abstract: 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.Type: ApplicationFiled: March 20, 2020Publication date: July 16, 2020Inventors: Natalia P. Zaitseva, M Leslie Carman, Andrew M. Glenn, Andrew Neil Mabe, Stephen A. Payne
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Patent number: 10647914Abstract: 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.Type: GrantFiled: March 17, 2017Date of Patent: May 12, 2020Assignee: Lawrence Livermore National Security, LLCInventors: Natalia P. Zaitseva, M. Leslie Carman, Andrew M. Glenn, Andrew Neil Mabe, Stephen A. Payne
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Patent number: 10266761Abstract: 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.Type: GrantFiled: March 7, 2016Date of Patent: April 23, 2019Assignee: Lawrence Livermore National Security, LLCInventors: Natalia P. Zaitseva, M Leslie Carman, Nerine Cherepy, Andrew M. Glenn, Sebastien Hamel, Stephen A. Payne, Benjamin L. Rupert
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Publication number: 20180265775Abstract: 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.Type: ApplicationFiled: March 17, 2017Publication date: September 20, 2018Inventors: Natalia P. Zaitseva, M. Leslie Carman, Andrew M. Glenn, Andrew Neil Mabe, Stephen A. Payne
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Patent number: 9650564Abstract: 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.Type: GrantFiled: May 14, 2012Date of Patent: May 16, 2017Assignee: Lawrence Livermore National Security, LLCInventors: Natalia P. Zaitseva, M. Leslie Carman, Michelle A. Faust, Andrew M. Glenn, H. Paul Martinez, Iwona A. Pawelczak, Stephen A. Payne, Keith E. Lewis
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Patent number: 9429663Abstract: A composition of matter includes an organic molecule having a composition different than stilbene. The organic molecule is embodied as a crystal, and exhibits: an optical response signature for neutrons; an optical response signature for gamma rays, and performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays. The optical response signature for neutrons is different than the optical response signature for gamma rays.Type: GrantFiled: April 9, 2014Date of Patent: August 30, 2016Assignee: Lawrence Livermore National Security, LLCInventors: Stephen A. Payne, Wolfgang Stoeffl, Natalia P. Zaitseva, Nerine J. Cherepy, M. Leslie Carman
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Publication number: 20160186052Abstract: 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.Type: ApplicationFiled: March 7, 2016Publication date: June 30, 2016Inventors: Natalia P. Zaitseva, M Leslie Carman, Nerine Cherepy, Andrew M. Glenn, Sebastien Hamel, Stephen A. Payne, Benjamin L. Rupert
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Patent number: 9309456Abstract: 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; 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 %.Type: GrantFiled: April 2, 2012Date of Patent: April 12, 2016Assignee: Lawrence Livermore National Security, LLCInventors: Natalia P. Zaitseva, M Leslie Carman, Nerine Cherepy, Andrew M. Glenn, Sebastien Hamel, Stephen A. Payne, Benjamin L. Rupert
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Patent number: 9274237Abstract: In one embodiment, a scintillator includes a scintillator material; a primary fluor, and a Li-containing compound, where the Li-containing compound is soluble in the primary fluor, and where the scintillator exhibits an optical response signature for thermal neutrons that is different than an optical response signature for fast neutrons and gamma rays.Type: GrantFiled: April 15, 2014Date of Patent: March 1, 2016Assignee: Lawrence Livermore National Security, LLCInventors: Natalia P. Zaitseva, M. Leslie Carman, Michelle A. Faust, Andrew M. Glenn, H. Paul Martinez, Stephen A. Payne
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Publication number: 20150028217Abstract: In one embodiment, a scintillator includes a scintillator material; a primary fluor, and a Li-containing compound, where the Li-containing compound is soluble in the primary fluor, and where the scintillator exhibits an optical response signature for thermal neutrons that is different than an optical response signature for fast neutrons and gamma rays.Type: ApplicationFiled: April 15, 2014Publication date: January 29, 2015Applicant: Lawrence Livermore National Sercurity, LLCInventors: Natalia P. Zaitseva, M. Leslie Carman, Michelle A. Faust, Andrew M. Glenn, H. Paul Martinez, Stephen A. Payne
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Patent number: 8872125Abstract: An organic crystal according to one embodiment includes an organic crystal comprising diphenylacetylene and stilbene or a stilbene derivative, the crystal having physical characteristics of formation from solution, the organic crystal exhibiting a signal response signature for neutrons from a radioactive source. A system according to one embodiment includes an organic crystal comprising diphenylacetylene and stilbene or a stilbene derivative, the crystal having physical characteristics of formation from solution, the organic crystal exhibiting a signal response signature for neutrons from a radioactive source; and a photodetector for detecting the signal response of the organic crystal. Methods of making such crystals are also provided.Type: GrantFiled: May 22, 2012Date of Patent: October 28, 2014Assignee: Lawrence Livermore National Security, LLCInventors: Natalia Zaitseva, M. Leslie Carman, Steve Payne
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Publication number: 20140291532Abstract: A composition of matter includes an organic molecule having a composition different than stilbene. The organic molecule is embodied as a crystal, and exhibits: an optical response signature for neutrons; an optical response signature for gamma rays, and performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays. The optical response signature for neutrons is different than the optical response signature for gamma rays.Type: ApplicationFiled: April 9, 2014Publication date: October 2, 2014Applicant: Lawrence Livermore National Security, LLCInventors: Stephen A. Payne, Wolfgang Stoeffl, Natalia P. Zaitseva, Nerine J. Cherepy, M. Leslie Carman
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Patent number: 8835865Abstract: A mixed organic crystal according to one embodiment includes a single mixed crystal having two compounds with different bandgap energies, the organic crystal having a physical property of exhibiting a signal response signature for neutrons from a radioactive source, wherein the signal response signature does not include a significantly-delayed luminescence characteristic of neutrons interacting with the organic crystal relative to a luminescence characteristic of gamma rays interacting with the organic crystal. According to one embodiment, an organic crystal includes bibenzyl and stilbene or a stilbene derivative, the organic crystal having a physical property of exhibiting a signal response signature for neutrons from a radioactive source.Type: GrantFiled: November 7, 2012Date of Patent: September 16, 2014Assignee: Lawrence Livermore National Security, LLC.Inventors: Natalia P. Zaitseva, M Leslie Carman, Andrew M. Glenn, Sebastien Hamel, Robert Hatarik, Stephen A. Payne, Wolfgang Stoeffl
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Patent number: 8815606Abstract: A thin-layer chromatography method for detection and identification of common military and peroxide explosives in samples includes the steps of provide a reverse-phase thin-layer chromatography plate; prepare the plate by marking spots on which to deposit the samples by touching the plate with a marker; spot one micro liter of a first standard onto one of the spots, spot one micro liter of a second standard onto another of the spots, and spot samples onto other of spots producing a spotted plate; add eluent to a developing chamber; add the spotted plate to the developing chamber; remove the spotted plate from the developing chamber producing a developed plate; place the developed plate in an ultraviolet light box; add a visualization agent to a dip tank; dip the developed plate in the dip tank and remove the developed plate quickly; and detect explosives by viewing said developed plate.Type: GrantFiled: April 21, 2008Date of Patent: August 26, 2014Assignee: Lawrence Livermore National Security, LLC.Inventors: Philip F. Pagoria, Alexander R. Mitchell, Richard E. Whipple, M. Leslie Carman
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Patent number: 8735843Abstract: A material according to one embodiment exhibits an optical response signature for neutrons that is different than an optical response signature for gamma rays, said material exhibiting performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays, wherein the material is not stilbene, the material comprising a molecule selected from a group consisting of: two or more benzene rings, one or more benzene rings with a carboxylic acid group, one or more benzene rings with at least one double bound adjacent to said benzene ring, and one or more benzene rings for which at least one atom in the benzene ring is not carbon.Type: GrantFiled: January 8, 2013Date of Patent: May 27, 2014Assignee: Lawrence Livermore National Security, LLC.Inventors: Stephen A. Payne, Wolfgang Stoeffl, Natalia P. Zaitseva, Nerine J. Cherepy, M. Leslie Carman
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Publication number: 20140027646Abstract: 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; 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 %.Type: ApplicationFiled: April 2, 2012Publication date: January 30, 2014Applicant: LAWRENCE LIVERMORE NATIONAL SECURITY, LLCInventors: Natalia P. Zaitseva, M Leslie Carman, Nerine Cherepy, Andrew M. Glenn, Sebastien Hamel, Stephen A. Payne, Benjamin L. Rupert
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Publication number: 20130299702Abstract: 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.Type: ApplicationFiled: May 14, 2012Publication date: November 14, 2013Applicant: LAWRENCE LIVERMORE NATIONAL SECURITY, LLCInventors: Natalia P. Zaitseva, M Leslie Carman, Michelle A. Faust, Andrew M. Glenn, H. Paul Martinez, Iwona A. Pawelczak, Stephen A. Payne, Keith E. Lewis