Abstract: A portable and wearable radiation dosimeter has a wearable housing. There is an optically stimulated luminescent (OSL) radiation sensing element removably mounted in the wearable housing so that the OSL radiation sensing element can be removed and read by an external OSL reader. There is also a fluorescent nuclear track detector (FNTD) radiation sensing element removably mounted in the wearable housing so that the FNTD radiation sensing element can be removed and read by an external FNTD reader. At least one on-board reader for at least one of the OSL and FNTD radiation sensing element for determining information about the radiation exposure of the sensing element while the sensor remains mounted in the housing, preferably using a different mode of reading than either OSL or FNTD.

Abstract: A method of determining radiation exposure during a criticality excursion of a dosimeter having at least one fluorescent nuclear track detector (FNTD) element includes determining the power spectrum integral (PSI) value of the fluorescent images obtained from FNTD element at each of a plurality of different depths using laser induced fluorescent microscopy; normalizing the depth profile to the shallowest depth; fitting a double exponential function to the normalized depth profile; determining the median neutron energy from the E=f(1/e) function; and determining a neutron energy dose correction factor (NCF) from the NCF=f(E) function. The neutron dose, D, can then be calculated by dividing absolute value of the neutron-induced PSI by a sensitivity factor S and multiplying it by the neutron energy dose correction factor NCF.

Abstract: A portable and wearable radiation dosimeter has a wearable housing. There is an optically stimulated luminescent (OSL) radiation sensing element removably mounted in the wearable housing so that the OSL radiation sensing element can be removed and read by an external OSL reader. There is also a fluorescent nuclear track detector (FNTD) radiation sensing element removably mounted in the wearable housing so that the FNTD radiation sensing element can be removed and read by an external FNTD reader. At least one on-board reader for at least one of the OSL and FNTD radiation sensing element for determining information about the radiation exposure of the sensing element while the sensor remains mounted in the housing, preferably using a different mode of reading than either OSL or FNTD.

Abstract: A device comprising an optically stimulated luminescence (OSL) reader having an optical engine with a light source, collection lens, a removably mounted dichroic mirror, and a photodetector.

Abstract: An optically stimulated luminescence (OSL) sensor is provided that has a reflective backing for improving the efficiency of exposing an optically stimulated luminescence material (OSLM) of the OSL sensor to stimulation light and for increasing the efficiency of detecting luminescent light emitted by the OSLM.

Abstract: Described is a method for determination of an unknown radiation dose to which an optically stimulated luminescence (OSL) sensor has been exposed utilizing a pulsed optically stimulated luminescence (POSL) technique and a battery operated portable instrument.

Abstract: A method comprising the following steps: (a) adjusting a radiation dose measurement for a fluorescent nuclear track detector based on a plurality of fluorescence contrast images for the fluorescent nuclear track detector to thereby produce a calibrated radiation dose measurement, and (b) displaying the calibrated radiation dose measurement to a user and/or saving the calibrated radiation dose measurement to a storage medium, wherein the fluorescent nuclear track detector comprises a luminescent material, wherein the radiation dose measurement is based on one or more fluorescent light measurements produced by fluorescent imaging of the fluorescent nuclear track detector using excitation light from a laser having a first wavelength, and wherein the plurality of fluorescence contrast images are produced by illuminating the fluorescent nuclear track detector with excitation light having a second wavelength.

Abstract: A method comprising the following steps: (a) adjusting a radiation dose measurement for a fluorescent nuclear track detector based on a plurality of fluorescence contrast images for the fluorescent nuclear track detector to thereby produce a calibrated radiation dose measurement, and (b) displaying the calibrated radiation dose measurement to a user and/or saving the calibrated radiation dose measurement to a storage medium, wherein the fluorescent nuclear track detector comprises a luminescent material, wherein the radiation dose measurement is based on one or more fluorescent light measurements produced by fluorescent imaging of the fluorescent nuclear track detector using excitation light from a laser having a first wavelength, and wherein the plurality of fluorescence contrast images are produced by illuminating the fluorescent nuclear track detector with excitation light having a second wavelength.

Abstract: Described is a portable dosimeter reader that is small in size and light in weight.

Abstract: Described is a method for determination of an unknown radiation dose to which an optically stimulated luminescence (OSL) sensor has been exposed utilizing a pulsed optically stimulated luminescence (POSL) technique and a battery operated portable instrument.

Abstract: Described is a portable dosimeter reader that is small in size and light in weight.

Abstract: Described is a method for determination of an unknown radiation dose to which an optically stimulated luminescence (OSL) sensor has been exposed utilizing a pulsed optically stimulated luminescence (POSL) technique and a battery operated portable instrument.

Abstract: Described is a portable dosimeter reader that is small in size and light in weight.

Abstract: Described is a portable dosimeter reader that is small in size and light in weight.

Abstract: Described is a method comprising the following steps: (a) moving a selected optically stimulated luminescence (OSL) sensor of two or OSL sensors mounted on a dosimeter sled to a reading position for an OSL reader; (b) reading the selected OSL sensor at the reading position using the OSL reader to measure a radiation dosage to which a dosimeter in which the dosimeter sled has been mounted has been exposed; and (c) repeating steps (a) and (b) for each of the two or more OSL sensors, wherein each OSL sensor comprises an optically stimulated luminescent material (OSLM) mounted in one or more cylindrical cup-shaped energy compensating filters, and wherein the dosimeter sled is part of a dosimeter.

Abstract: Described is an optical system for a dosimeter reader having reduced sensitivity to vibration and motion.

Abstract: An optically stimulated luminescence (OSL) sensor is provided that has a reflective backing for improving the efficiency of exposing an optically stimulated luminescence material (OSLM) of the OSL sensor to stimulation light and for increasing the efficiency of detecting luminescent light emitted by the OSLM.

Abstract: An optically stimulated luminescence (OSL) reader having an optical engine with a removably mounted dichroic mirror is provided.

Abstract: Described is a method for determination of an unknown radiation dose to which an optically stimulated luminescence (OSL) sensor has been exposed utilizing a pulsed optically stimulated luminescence (POSL) technique and a battery operated portable instrument.

Abstract: Described is a dosimeter reader for reading a plurality of optically stimulated luminescence (OSL) sensors of a dosimeter sled and for reading an RFID tag on the dosimeter sled.