Meriden, CT, United States
Meriden, CT, United States

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Patent
Canberra Industries | Date: 2015-12-09

A multi-radiation identification and dosimetry system and method that allows for monitoring of alpha, beta, and gamma radiation is disclosed. The system/method incorporates a segmented silicon drift detector (SSDD) that allows measurement of directly absorbed radiation in the semiconductor (betas, conversion electrons, Lx lines, and alphas) on one SSDD segment and radiation from a radiation scintillation detector (RSD) on multiple segments of the SSDD. With the anode side of the SSDD directed toward the radiation inspection surface (RIS), the SSDD+RSD stacked radiation detector collects radiation which is processed by a charge sensitive amplifier (CSA) and then processed by a time stamping differentiator (TSD). A computing control device (CCD) may be configured to collect the time stamp differentiation data from the various SSDD segments to permit the simultaneous discrimination of several types of radiation by and presentation of these radiation types and counts on a display monitor.


Patent
Canberra Industries | Date: 2012-12-05

A spectrometer calibration system and method that permits a database of spectral peak shapes to be applied as basis template functions to characterize a radiation detector is disclosed. The disclosed system/method interpolates stored arrays representing a series of spectral peak shapes at a range of specified energies to enable formation of a calibration peak shape template at any desired spectral energy level. These basis functions may be generated from analytical functions and/or empirically measured spectral data and produce output shape calibration templates that are independent of the generation method for the basis templates. The disclosed system/method acts as an abstraction layer between the method of peak shape determination and the use of the peak shape basis functions in any subsequent spectroscopic analysis, permitting rapid and inexpensive spectrometer calibration updates without the need for any embedded spectrometer software modifications.


Patent
Canberra Industries | Date: 2014-06-25

A spatially-aware radiation probe system/method allowing for detection and correction of radiation readings based on the position and/or movement of a radiation detector is disclosed. The system incorporates a radiation detector combined with a spatially-aware sensor to permit detection of spatial context parameters associated with the radiation detector and/or object being probed. This spatial context information is then used by analysis software to modify the detected radiation values and/or instruct the radiation probe operator as to appropriate measurement activity to ensure accurate radiation measurements. The spatially-aware sensor may include but is not limited to: distance sensors to determine the distance between the radiation detector and the object being monitored; accelerometers integrated within the radiation detector to detect movement of the radiation detector; and/or axial orientation sensors to determine the axial orientation of the radiation detector.


Patent
Canberra Industries | Date: 2013-11-06

A radiation detector system and method that significantly reduces the cost of conventionally constructed radiation detectors is disclosed. The disclosed system generally comprises an injection molded detector body incorporating plastic material with embedded feed-thrus that are encapsulated within the detector body. This detector body is mated to a detector window assembly using a gasket or other means of sealing to inhibit gas leakage. The mating methodology between the detector body and the detector window assembly is by means of plastic snap-on tabs in these structures that permit semi-permanent mating while also allowing the structures to be easily disassembled for repair and maintenance. The present invention system/method permits a significant hardware cost reduction as compared to conventional prior art radiation detector construction methodologies.


Patent
Canberra Industries | Date: 2012-11-12

A radiation analysis system/method that automatically optimizes the efficiency calibration of a counting system based on benchmark data and variable parameters associated with radiation source/sensor/environment (RSSE) combinations is disclosed. The system/method bifurcates RSSE context (SSEC) model parameters into WELL-KNOWN (fixed) parameters (WNP) and NOT-WELL-KNOWN (variable) parameters (NWP). The NWP have associated lower/upper limit values (LULV) and a shape distribution (LUSD) describing NWP characteristics. SSEC models are evaluated using randomized statistical NWP variations or by using smart routines that perform a focused search within the LULV/LUSD to generate model calibration values (MCV) and calibration uncertainty values (UCV) describing the overall SSEC efficiencies. Sensor measurements using the MCV/UCV generate a measurement value and uncertainty estimation value. An exemplary embodiment optimizes geometry models of radiation sources by benchmarking with respect to measurement data from spectroscopy detectors and/or dose rate detectors.


Patent
Canberra Industries | Date: 2013-12-18

A radiation detector system/method (0300) that simultaneously detects alpha/beta, beta/gamma, or alpha/beta/gamma radiation within an integrated detector is disclosed. The system incorporates a photomultiplier tube (0302) with radiation scintillation materials (0301) to detect alpha/beta/gamma radiation. The photomultiplier tube (0302) output is then shape amplified (0303) and fed through discriminators (0304) to detect the individual radiation types. The discriminator outputs are fed to an anti-coincidence and pulse width and timing analysis module (0305) that determines whether individual alpha/beta/gamma pulses are valid and should be counted by corresponding alpha/beta/gamma pulse radiation counters (0306). The system may include a radiation detection method to affect alpha/beta/gamma radiation detection in a variety of contexts. The system/method may be implemented in a variety of applications, including but not limited to whole body radiation contamination detectors, laundry radiation scanners, tool/article radiation detectors, and the like.


Patent
Canberra Industries | Date: 2013-01-25

A spatially-aware radiation probe system/method allowing for detection and correction of radiation readings based on the position and/or movement of a radiation detector is disclosed. The system incorporates a radiation detector combined with a spatially-aware sensor to permit detection of spatial context parameters associated with the radiation detector and/or object being probed. This spatial context information is then used by analysis software to modify the detected radiation values and/or instruct the radiation probe operator as to appropriate measurement activity to ensure accurate radiation measurements. The spatially-aware sensor may include but is not limited to: distance sensors to determine the distance between the radiation detector and the object being monitored; accelerometers integrated within the radiation detector to detect movement of the radiation detector; and/or axial orientation sensors to determine the axial orientation of the radiation detector.


Patent
Canberra Industries | Date: 2015-03-02

A nuclide decay discriminator system and method is disclosed. The system utilizes a digital computing device (DCD) to capture radiation counts from a radiation detection device (RDD) such as a photon detector via the use of one or more integrated analog-to-digital converters (ADC). The radiation count information is then processed using a recursive procedure in the DCD that determines the desired nuclide to be evaluated and then defines the possible nuclide decay transition states. For each possible nuclide decay state, a recursive permutation of possible state transitions from this nuclide state is determined using a state permutation engine (SPE). Combinations of these state transition branches are linked to form state transition chains each having individual probabilities associated with the overall state transition chain. These state transition chain probabilities are applied to the RDD ADC data to form observed RDD radiation data radiation count probabilities and displayed in real-time.


Patent
Canberra Industries | Date: 2013-05-22

A surface contamination monitoring system/method configured to correct the detected the radioactive net count rate (NCR) value of a whole-body surface contamination monitoring device based on monitored subject height and thickness is disclosed. The system includes a height detection means for determining the height of a monitored subject and a thickness detection means for determining the thickness of at least a portion of the monitored subject. The net count rate (NCR) is corrected based on the determined height and thickness of the monitored subject as applied to site calibration factor data and self-shielding factor data to produce a corrected net count rate (CNR). If the corrected net count rate (CNR) registers above a preset alarm threshold, the monitored subject is considered contaminated and an appropriate alarm is registered.


Patent
Canberra Industries | Date: 2012-11-14

A surface contamination monitoring system/method configured to correct the detected the radioactive net count rate (NCR) value of a whole-body surface contamination monitoring device based on monitored subject height and thickness is disclosed. The system includes a height detection means for determining the height of a monitored subject and a thickness detection means for determining the thickness of at least a portion of the monitored subject. The net count rate (NCR) is corrected based on the determined height and thickness of the monitored subject as applied to site calibration factor data and self-shielding factor data to produce a corrected net count rate (CNR). If the corrected net count rate (CNR) registers above a preset alarm threshold, the monitored subject is considered contaminated and an appropriate alarm is registered.

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