Patents Assigned to American Science & Engineering, Inc.
  • Patent number: 10228487
    Abstract: An X-ray cargo inspection system and method. A lead-in conveyor on a first trailer receives a cargo container for inspection. An inspection module disposed on a second trailer then scans the cargo container with penetrating radiation, detects penetrating radiation that has interacted with the cargo container, and produces an inspection signal. An exit conveyor disposed on a third trailer projects the cargo container following scanning. The inspection module may contain transmission or scatter detectors, or both. Multiple lead-in conveyors may serve to load additional cargo containers for subsequent scanning by the inspection module.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: March 12, 2019
    Assignee: American Science and Engineering, Inc.
    Inventor: Richard Mastronardi
  • Patent number: 10209372
    Abstract: Methods for discriminating among x-ray beams of distinct energy content. A first volume of scintillation medium converts energy of incident penetrating radiation into scintillation light which is extracted from a scintillation light extraction region by a plurality of optical waveguides that convert the scintillation light to light of a longer wavelength. An x-ray beam initially incident upon the first volume of scintillation medium and traversing the first volume is then incident on a second volume of scintillation medium. The first and second scintillation media may be separated by an absorber or one or more further volumes of scintillation medium, and may also have differential spectral sensitivities. Scintillation light from the first and second scintillation volumes is detected in respective detectors and processed to yield a measure of respective low energy and high-energy components of the incident x-ray beam.
    Type: Grant
    Filed: April 18, 2017
    Date of Patent: February 19, 2019
    Assignee: American Science and Engineering, Inc.
    Inventors: Anatoli Arodzero, Joseph Callerame, Dan-Cristian Dinca, Rajen Sud, Lee Grodzins, Martin Rommel, Peter Rothschild, Jeffrey Schubert, Aaron Couture, Jeffrey M. Denker, Jonathan Edward Everett
  • Patent number: 9867271
    Abstract: Methods for generating a multiple-energy X-ray pulse. A beam of electrons is generated with an electron gun and modulated prior to injection into an accelerating structure to achieve at least a first and specified beam current amplitude over the course of respective beam current temporal profiles. A radio frequency field is applied to the accelerating structure with a specified RF field amplitude and a specified RF temporal profile. The first and second specified beam current amplitudes are injected serially, each after a specified delay, in such a manner as to achieve at least two distinct endpoint energies of electrons accelerated within the accelerating structure during a course of a single RF-pulse. The beam of electrons is accelerated by the radio frequency field within the accelerating structure to produce accelerated electrons which impinge upon a target for generating Bremsstrahlung X-rays.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: January 9, 2018
    Assignee: American Science and Engineering, Inc.
    Inventor: Aleksandr Saverskiy
  • Patent number: 9841386
    Abstract: Systems and methods for detecting clandestine fissile or radioactive material on the basis of emitted radiation and particles (such as neutrons and alpha particles) arising from within the material. Emission by the fissile or radioactive material is detected in conjunction with a conventional x-ray imaging system that includes an external source of illuminating penetrating radiation, at least one detector configured to detect at least the penetrating radiation and to generate a detector signal, and a processor configured as a detector signal discriminator to generate an output indicating whether the detector signal is triggered by an origin other than illuminating penetrating radiation. Active and passive modes of detection are described by some embodiments. Other embodiments are directed toward neutron detection, gamma ray detection with energy resolution, and designs of detectors to enhance the detection of clandestine nuclear material.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: December 12, 2017
    Assignee: AMERICAN SCIENCE AND ENGINEERING, INC.
    Inventors: Lee Grodzins, Peter J. Rothschild, William L. Adams
  • Patent number: 9658343
    Abstract: Methods for discriminating among x-ray beams of distinct energy content. A first volume of scintillation medium converts energy of incident penetrating radiation into scintillation light which is extracted from a scintillation light extraction region by a plurality of optical waveguides that convert the scintillation light to light of a longer wavelength. An x-ray beam initially incident upon the first volume of scintillation medium and traversing the first volume is then incident on a second volume of scintillation medium. The first and second scintillation media may be separated by an absorber or one or more further volumes of scintillation medium, and may also have differential spectral sensitivities. Scintillation light from the first and second scintillation volumes is detected in respective detectors and processed to yield a measure of respective low energy and high-energy components of the incident x-ray beam.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: May 23, 2017
    Assignee: American Science and Engineering, Inc.
    Inventors: Anatoli Arodzero, Joseph Callerame, Dan-Christian Dinca, Rajen Sud, Lee Grodzins, Martin Rommel, Peter Rothschild, Jeffrey Schubert
  • Publication number: 20170055338
    Abstract: Methods for generating a multiple-energy X-ray pulse. A beam of electrons is generated with an electron gun and modulated prior to injection into an accelerating structure to achieve at least a first and specified beam current amplitude over the course of respective beam current temporal profiles. A radio frequency field is applied to the accelerating structure with a specified RF field amplitude and a specified RF temporal profile. The first and second specified beam current amplitudes are injected serially, each after a specified delay, in such a manner as to achieve at least two distinct endpoint energies of electrons accelerated within the accelerating structure during a course of a single RF-pulse. The beam of electrons is accelerated by the radio frequency field within the accelerating structure to produce accelerated electrons which impinge upon a target for generating Bremsstrahlung X-rays.
    Type: Application
    Filed: May 14, 2015
    Publication date: February 23, 2017
    Applicant: American Science and Engineering, Inc.
    Inventor: Aleksandr Saverskiy
  • Patent number: 9541510
    Abstract: X-ray inspection of moving cargo based on acquiring multiple image lines at one time or substantially at one time. An X-ray source with multiple-beam electron beam targets creates multiple parallel X-ray fan beams. X-ray inspection systems and methods employ such multiple-beam sources for purposes of inspecting fast moving cargo.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: January 10, 2017
    Assignee: American Science and Engineering, Inc.
    Inventors: Anatoli Arodzero, Martin Rommel
  • Patent number: 9535019
    Abstract: A method for imaging a target with an x-ray scatter apparatus. Air scatter from air intervening between the x-ray scatter apparatus and a target overwhelms x-ray scatter from the target in that x-ray scatter from a position on the target is no more than 10% of the x-ray scatter due to intervening air scatter that reaches at least one point in the detector plane of the x-ray scatter apparatus. The target is illuminated with a beam of x-rays scanned across the target, and x-rays scattered by the target are detected using a detector with a centroid displaced with respect to the beam axis by at least five feet. The detector signal is then processed to generate an image of the target. The beam of x-rays may be unshielded, and/or the detector may be uncollimated.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: January 3, 2017
    Assignee: American Science and Engineering, Inc.
    Inventor: Peter J. Rothschild
  • Patent number: 9466456
    Abstract: An x-ray tube for generating a sweeping x-ray beam. A cathode is disposed within a vacuum enclosure and emits a beam of electrons attracted toward a rotating anode. The rotating anode is adapted for rotation with respect to the vacuum enclosure about an axis of rotation. At least one collimator opening or aperture corotates with the rotating anode within the vacuum enclosure, such that a swept x-ray beam is emitted.
    Type: Grant
    Filed: June 29, 2015
    Date of Patent: October 11, 2016
    Assignee: American Science and Engineering, Inc.
    Inventors: Martin Rommel, Peter Rothschild
  • Patent number: 9417060
    Abstract: Methods and apparatus for determining the distance to a specified point or distances between specified points on one or more objects, where the specified points are obscured behind an opaque barrier and cannot be viewed. Specified points are illuminated with penetrating radiation from two or more successive locations, and scattered radiation from the specified points is detected, and distance is calculated based on illumination angles. The apparatus has a source of penetrating radiation, a beam scanner for directing the penetrating radiation, a detector for detecting scattered radiation, and a processor for calculating the distance.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: August 16, 2016
    Assignee: American Science and Engineering, Inc.
    Inventor: Jeffrey R. Schubert
  • Patent number: 9291582
    Abstract: An adjustable collimator for shaping a beam of particles, such as for purposes of inspecting contents of a container. The adjustable collimator has an obscuring element substantially opaque to passage of the particles in a propagation direction that is radial with respect to the axis of rotation of a ring of apertures. A gap in the obscuring element may be characterized by a length taken along a long dimension and a jaw spacing taken along narrow dimension, and at least one of the length of the gap and the jaw spacing is subject to adjustment, either manual or automatic. The adjustable collimator may be disposed either inside or outside the ring of apertures, and, in some embodiments, the jaw spacing may be a function of distance along the long dimension relative to an edge of the gap.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 22, 2016
    Assignee: American Science and Engineering, Inc.
    Inventors: Lee Grodzins, Jeffrey R. Schubert, Omar Al-Kofahi, Peter J. Rothschild
  • Patent number: 9285488
    Abstract: A detector and methods for inspecting material on the basis of scintillator coupled by wavelength-shifting optical fiber to one or more photo-detectors, with a temporal integration of the photo-detector signal. An unpixelated volume of scintillation medium converts energy of incident penetrating radiation into scintillation light which is extracted from a scintillation light extraction region by a plurality of optical waveguides. This geometry provides for efficient and compact detectors, enabling hitherto unattainable geometries for backscatter detection and for energy discrimination of incident radiation. Additional energy-resolving transmission configurations are enabled as are skew- and misalignment compensation.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: March 15, 2016
    Assignee: American Science and Engineering, Inc.
    Inventors: Anatoli Arodzero, Joseph Callerame, Dan-Cristian Dinca, Rajen Sud, Lee Grodzins, Martin Rommel, Peter Rothschild, Jeffrey Schubert
  • Patent number: 9257208
    Abstract: A system for producing a controllable beam of radiation is controllable electronically, and includes no parts that must move relative to one another while in operation to form the beam. The direction and cross-section of the beam may be controlled electronically by controlling an electron beam. Various embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the aperture material thickness without requiring movement of the aperture or physical components that create the aperture. Some embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the beam angle.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: February 9, 2016
    Assignee: American Science and Engineering, Inc.
    Inventor: Martin Rommel
  • Patent number: 9146201
    Abstract: An x-ray inspection system using backscatter of an x-ray beam emitted through a scan panel contiguous with, but of a material distinct from, an enclosure that contains an x-ray source by which the x-ray beam is generated. The scan panel is contoured in such a manner as to be visibly blended with a shape characterizing the enclosure. In some embodiments, the beam traverses multiple scan panels, where one or more of the scan panels may be selected for beam filtration properties. The scan panel may be disposed interior to a sliding door, and may be structured to serve as a scatter shield.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: September 29, 2015
    Assignee: American Science and Engineering, Inc.
    Inventors: Jeffrey Schubert, Jeffrey M. Denker, Jason Toppan, Michael Chesna, Richard Mastronardi, Robyn Smith, Richard Schueller, Jeffrey Illig
  • Patent number: 9117564
    Abstract: A system for producing a controllable beam of radiation is controllable electronically, and includes no parts that must move relative to one another while in operation to form the beam. The direction and cross-section of the beam may be controlled electronically by controlling an electron beam. Various embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the aperture material thickness without requiring movement of the aperture or physical components that create the aperture. Some embodiments provide an X-ray collimator that allows forming a scanning X-ray beam of desired size and flux independently of the beam angle.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: August 25, 2015
    Assignee: American Science and Engineering, Inc.
    Inventor: Martin Rommel
  • Patent number: 9099279
    Abstract: An x-ray tube for generating a sweeping x-ray beam. A cathode is disposed within a vacuum enclosure and emits a beam of electrons attracted toward an anode. The anode is adapted for rotation with respect to the vacuum enclosure about an axis of rotation. At least one collimator opening corotates with the anode within the vacuum enclosure, such that a swept x-ray beam is emitted.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: August 4, 2015
    Assignee: American Science and Engineering, Inc.
    Inventors: Martin Rommel, Peter Rothschild
  • Patent number: 9020103
    Abstract: A versatile beam scanner for generating a far-field scanned pencil beam, and, alternatively, a far-field pencil beam. An angle selector limits the angular extent of an inner fan beam emitted by a source of penetrating radiation. The source and angle selector may be translated, along a direction parallel to a central axis of a multi-aperture unit, in such a manner as to generate a scanned far-field pencil beam, when rings of apertures are interposed between the source and an inspected target, or, alternatively, a far-field fan beam, when no ring of apertures is interposed.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: April 28, 2015
    Assignee: American Science and Engineering, Inc.
    Inventor: Lee Grodzins
  • Patent number: 9014339
    Abstract: Apparatus for interrupting and/or scanning a beam of penetrating radiation, such as for purposes of inspecting contents of a container. A source, such as an x-ray tube, generates a fan beam of radiation effectively emanating from a source axis, with the width of the fan beam collimated by a width collimator, such as a clamshell collimator. An angular collimator, stationary during the course of scanning, limits the extent of the scan, and a multi-aperture unit, such as a hoop, or a nested pair of hoops, is rotated about a central axis, and structured in such a manner that beam flux incident on a target is conserved for different fields of view of the beam on the target. The central axis of hoop rotation need not coincide with the source axis.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: April 21, 2015
    Assignee: American Science and Engineering, Inc.
    Inventors: Lee Grodzins, Jeffrey R. Schubert, Omar Al-Kofahi, Peter J. Rothschild
  • Patent number: 8971487
    Abstract: A mobile scanning system and methods for inspecting contents of a container. Multiple detector plates are arrayed along an arcuate member coupled to a conveyance with wheels, capable of road travel. A source generates high-energy penetrating radiation that irradiates each of the detector plates from a single position. The arcuate member is disposed, during the course of operation of the system, in a vertical plane. The system has one actuator for rotating the arcuate member about a horizontal pivot into a horizontal plane, and a second actuator for further rotating the arcuate member, once rotated into the horizontal plane, about a vertical pivot, so that the arcuate member is contained, for purposes of transport, entirely within a volume defined by a rectangular prism that does not extend horizontally outward from the conveyance beyond any of its wheels.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: March 3, 2015
    Assignee: American Science and Engineering, Inc.
    Inventors: Richard Mastronardi, David Blake, Seth Van Liew, Jeffrey Warren
  • Patent number: D724216
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: March 10, 2015
    Assignee: American Science and Engineering, Inc.
    Inventors: Evan Gant, Joongoo Lee, Philip Leung