Abstract: Disclosed are systems and methods for trusted and secure application deployment via collective signature verification of the application artifacts. The trusted and secure application deployment may include receiving multiple application artifacts, decoding verifications from at least one cryptographic signature associated with each received artifact, comparing the verifications to a first set of requirements specified in an admission control list, comparing the verifications from a first received artifact to a second set of requirements specified in the verifications of a second received artifact, halting the deployment of the artifacts in response to the decoded verifications not satisfying one or more requirements from the first set of requirements or the second set of requirements, and deploying the artifacts to a set of compute nodes in response to the verifications decoded from the received artifacts satisfying the first set of requirements and the second set of requirements.

Abstract: Disclosed are systems and methods for trusted and secure application deployment via collective signature verification of the application artifacts. The trusted and secure application deployment may include receiving multiple application artifacts, decoding verifications from at least one cryptographic signature associated with each received artifact, comparing the verifications to a first set of requirements specified in an admission control list, comparing the verifications from a first received artifact to a second set of requirements specified in the verifications of a second received artifact, halting the deployment of the artifacts in response to the decoded verifications not satisfying one or more requirements from the first set of requirements or the second set of requirements, and deploying the artifacts to a set of compute nodes in response to the verifications decoded from the received artifacts satisfying the first set of requirements and the second set of requirements.

Abstract: An orchestration system may provide distributed and seamless stateful high performance computing for performance critical workflows and data across geographically distributed compute nodes. The system may receive a task with different jobs that operate on a particular dataset, may determine a set of policies that define execution priorities for the jobs, and may determine a current state of compute nodes that are distributed across different compute sites. The system may distribute the jobs across a selected set of the compute nodes in response to the current state of the set of compute nodes satisfying more of the execution priorities than the current state of other compute nodes. The system may produce task output based on modifications made to the particular database as each compute node of the set of compute nodes executes a different job of the plurality of jobs.

Abstract: An orchestration system may provide distributed and seamless stateful high performance computing for performance critical workflows and data across geographically distributed compute nodes. The system may receive a task with different jobs that operate on a particular dataset, may determine a set of policies that define execution priorities for the jobs, and may determine a current state of compute nodes that are distributed across different compute sites. The system may distribute the jobs across a selected set of the compute nodes in response to the current state of the set of compute nodes satisfying more of the execution priorities than the current state of other compute nodes. The system may produce task output based on modifications made to the particular database as each compute node of the set of compute nodes executes a different job of the plurality of jobs.

Abstract: A valve is configured to control a flow of a gas disposed within a convective cooling loop. The valve can be actuated between an open position and a closed position via a magnetic field generated by at least one electrically conductive coil disposed within a cryostat.

Abstract: A superconducting magnet system, including a cryostat, and a ride-through system for the superconducting magnet system include: one or more gravity-fed cooling tubes configured to have therein a cryogenic fluid; a first heat exchanger configured to transfer heat from the one or more gravity-fed cooling tubes to a cryocooler; a storage device having an input connected to the first heat exchanger and configured to receive and store a boiled-off gas from the first heat exchanger; and a thermal regenerator having an input connected to the output of the storage device.

Abstract: Disclosed herein is a system for fast gain regulation in a gamma-ray spectroscopy instrument. The system includes a detector configured to generate a signal indicative of energy arriving at the detector, and a processor configured to determine one or more system performance indicators. The system also includes a controller configured to compute a first gain correction term based on one of more system performance indicators and change the device gain based on the computed first gain correction term.

Abstract: An apparatus including a persistent current switch of a superconducting material which is electrically superconducting at a superconducting temperature and electrically resistive at a resistive mode temperature which is greater than the superconducting temperature. The apparatus further includes a first heat exchange element; a convective heat dissipation loop thermally coupling the persistent current switch to the first heat exchange element; a second heat exchange element spaced apart from the first heat exchange element; and a thermally conductive link thermally coupling the persistent current switch to the second heat exchange element. The first heat exchange element is disposed above the persistent current switch. The thermally conductive link may have a greater thermal conductivity at the superconducting temperature than at a second temperature which is greater than the superconducting temperature.

Abstract: The present disclosure describes a neutron generator including an ion source that generates ions; a target that outputs neutrons when the ions impact the target; one or more power supplies that supply electrical power to the ion source and the target; and a control system. The control system determines one or more rules that describe relationships between operational parameters, useful life, reliability, neutron output, environment, and constraints of the neutron generators; determines one or more operational parameter setpoints based at least in part on the one or more rules; and instructs the one or more power supplies to adjust electrical power supplied to the ion source, the target, or both based at least in part on the one or more operational parameter setpoints.

Abstract: Systems, methods, and devices for thermally protecting a scintillator crystal of a scintillation detector are provided. In one example, a thermally-protected scintillator may include a scintillator crystal and a thermal protection element, which may partially surround the scintillator crystal. The thermal protection element may be configured to prevent the scintillator crystal from experiencing a rate of change in temperature sufficient to cause cracking or non-uniform light output, or a combination thereof.

Abstract: A heat exchanger (5) includes a thermally conductive cylindrical container (40), at least one thermally conductive tube (30), a cooling column (90), and a cryogen coldhead (100). The cooling column and coldhead condense gaseous helium to liquid helium to maintain a reservoir of liquid helium in the thermally conductive cylindrical container (40). The at least one thermally conductive tube (30) coils circumferentially around the container (40), and extends to at least one superconducting magnet coil heat exchanger (20), and back. The tube forms a selected loop which holds gaseous helium at pressure up about 104 bar (1500 PSI) or room temperature to about 0.75 bar at cryogenic temperatures.

Abstract: A magnetic resonance magnet assembly 20 has a coil form 70 shaped as a hollow cylinder. At least two thermally conductive sheets 60 are disposed circumferentially around the coil form 70, separated by a non-electrically conductive region 90. Thermally conductive tubing 50 affixed to each thermally conductive sheeting section 60 runs circumferentially around the coil form 70. At least one layer of thermally conductive electrically insulating material 110 such as fiber glass is bonded with a thermally conductive epoxy encapsulant to the thermally conductive sheets 60. A winding of superconductive wire 80 is bond together and to the electrically insulating material 110 with the thermally conductive epoxy encapsulant.

Abstract: Systems, methods, and devices involving segmented radiation detectors are provided. For example, a segmented radiation detector may include a segmented scintillator and an optical-to-electrical converter. The segmented scintillator may have several segments that convert radiation to light, at least one of which may detect radiation arriving from an azimuthal angle around an axis of the segmented scintillator. The optical-to-electrical converter may be coupled to the segmented scintillator. The optical-to-electrical converter may receive the light from the segments of the segmented scintillator and output respective electrical signals corresponding to the amount of radiation detected by each segment.

Abstract: The present disclosure describes a neutron generator including an ion source that generates ions; a target that outputs neutrons when the ions impact the target; one or more power supplies that supply electrical power to the ion source and the target; and a control system. The control system determines one or more rules that describe relationships between operational parameters, useful life, reliability, neutron output, environment, and constraints of the neutron generators; determines one or more operational parameter setpoints based at least in part on the one or more rules; and instructs the one or more power supplies to adjust electrical power supplied to the ion source, the target, or both based at least in part on the one or more operational parameter setpoints.

Abstract: Disclosed herein is a system for fast gain regulation in a gamma-ray spectroscopy instrument. The system includes a detector configured to generate a signal indicative of energy arriving at the detector, and a processor configured to determine one or more system performance indicators. The system also includes a controller configured to compute a first gain correction term based on one of more system performance indicators and change the device gain based on the computed first gain correction term.

Abstract: A superconducting magnet system, including a cryostat, and a ride-through system for the superconducting magnet system include: one or more gravity-fed cooling tubes configured to have therein a cryogenic fluid; a first heat exchanger configured to transfer heat from the one or more gravity-fed cooling tubes to a cryocooler; a storage device having an input connected to the first heat exchanger and configured to receive and store a boiled-off gas from the first heat exchanger; and a thermal regenerator having an input connected to the output of the storage device.

Abstract: A valve is configured to control a flow of a gas disposed within a convective cooling loop. The valve can be actuated between an open position and a closed position via a magnetic field generated by at least one electrically conductive coil disposed within a cryostat.

Abstract: Disclosed herein is a system for fast gain regulation in a gamma-ray spectroscopy instrument. The system includes a detector configured to generate a signal indicative of energy arriving at the detector, and a processor configured to determine one or more system performance indicators. The system also includes a controller configured to compute a first gain correction term based on one of more system performance indicators and change the device gain based on the computed first gain correction tem.

Abstract: An apparatus including a persistent current switch of a superconducting material which is electrically superconducting at a superconducting temperature and electrically resistive at a resistive mode temperature which is greater than the superconducting temperature. The apparatus further includes a first heat exchange element; a convective heat dissipation loop thermally coupling the persistent current switch to the first heat exchange element; a second heat exchange element spaced apart from the first heat exchange element; and a thermally conductive link thermally coupling the persistent current switch to the second heat exchange element. The first heat exchange element is disposed above the persistent current switch. The thermally conductive link may have a greater thermal conductivity at the superconducting temperature than at a second temperature which is greater than the superconducting temperature.

Abstract: A method for regulating output of a high voltage generator includes monitoring a voltage output of the generator and comparing it to a voltage setpoint to generate an error signal. A load on the generator is monitored to generate a load signal. The load signal is conducted to a feedforward signal generator. The feedforward signal generator is configured to produce a feedforward signal corresponding to the load and to at least one parameter related to an output impedance of the high voltage generator. The error signal is conducted to a high voltage regulation loop. The control loop output and the feedforward signal generator output are coupled to a driver for the high voltage generator.