Icx Technologies Gmbh

Icx Radiation Gmbh

Helmholtz-zentrum Dresden-rossendorf E.v.

Ion Beam Applications S.a.

Technische Universitát Dresden

Flir Detection, Inc.

Target Systemelectronic Gmbh

Flir Radiation Gmbh

Guntram Pausch

Jürgen Stein

Juergen Stein

Karen Saucke

Damien Prieels

Julien Smeets

Yong Kong

Guillaume Janssens

Andrey K Gueorguiev

Les Hoy

David Weinberger

Toni Kögler

Cristina Plettner

Claus-Michael Herbach

Wolfgang Enghardt

Christian Golnik

Fernando Hueso-Gonzalez

Claus Michael Herbach

A photodetector () having an exposure surface () has a first photodiode array () having a first light entry surface () and a second photodiode array () having a second light entry surface (). The first photodiode array () has an avalanche photodiode (). The second photodiode array () has a non-amplifying photodiode (). The first light entry surface () and the second light entry surface () form sub-surfaces of the exposure surface ().

Photodetector having an avalanche photodiode, radiation detector, positron emission tomograph and method for operating a photodetector

A method of distinguishing effective pulses from test pulses in a scintillation detector that generates measurement light pulses includes providing a regularly-pulsed test light source that produces individual test light pulses having a time-dependent course of relative light intensity, which differs from a time-dependent course of relative light intensity of the measurement light pulses. The test light pulses are provided to a light detector for measurement of the test light pulses. The time-dependent courses of the relative light intensities of the test light pulses are analyzed. The measured pulses are separated into the test light pulses and the measurement light pulses according to the different time-dependent courses of the relative light intensities. The detector includes a scintillator, a light detector, a regularly-pulsed test light source that is adapted provide test light pulses to the light detector for measurement, and an electronic measuring circuit.

Method for signal separation in scintillation detectors

The invention is related to a method for monitoring a range of a particle beam in a target. The method is using gamma detectors for detecting prompt gammas produced in the target. The time differences between the time of detecting a gamma quantum and a time of emission of a particle or a bunch of particles from the radiation device are determined. A statistical distribution of those time difference is used to deduce information related to the range of the beam. The invention is also related to an apparatus for monitoring a range based on measured time profiles of detected prompt gammas.

Method and apparatus for monitoring the range of a particle beam

A directional gamma radiation detector system for determining an angle under which a measured gamma radiation hits a gamma radiation detector system, includes gamma radiation detectors arranged in close distance; detector electronics for operating the at least two gamma radiation detectors as spectrometers in a way that the detector electronics are collecting energy spectra of the detected gamma rays for each gamma radiation detector; and system electronics allowing the directional gamma radiation detector system to identify coincident events in the at least two gamma radiation detectors.

Directional gamma radiation detector system

The invention relates to a neutron detector for detection of neutrons in fields with significant &#x3b3;- or &#x3b2;-radiation, comprising a neutron sensitive scintillator crystal, providing a neutron capture signal being larger than the capture signal of 3 MeV &#x3b3;-radiation, a semiconductor based photo detector being optically coupled to the scintillator crystal, where the scintillator crystal and the semiconductor based photo detector are selected so that the total charge collection time for scintillator signals in the semiconductor based photo detector is larger than the total charge collection time for signals generated by direct detection of ionizing radiation in the semiconductor based photo detector, the neutron detector further comprising a device for sampling the detector signals, a digital signal processing device, means which distinguish direct signals from the semiconductor based photo detector, caused by &#x3b3;- or &#x3b2;-radiation and being at least partially absorbed in the semiconductor based photo detector, from light signals entering the semiconductor based photo detector, after being emitted from the scintillator crystal after capturing at least one neutron, by means of pulse shape discrimination, utilizing a difference between the total charge collection time for scintillator signals from the total charge collection time for signals generated by direct detection of ionizing radiation in the semiconductor based photo detector, and means which distinguish neutron induced signals from &#x3b3;-radiation induced signals in the scintillator crystal by discriminating the different signals via their pulse height, making use of the difference between the number of photons generated by neutron and &#x3b3;-radiation in the field of interest.

Solid state neutron detector

The invention relates to a detector for measuring nuclear radiation, especially gamma-radiation, comprising a scintillator crystal with a light decay time of less than 100 ns, a silicon drift detector (SDD) for the measurement of both direct hits of low energy radiation and the light, being emitted from the scintillator crystal, the silicon drift detector being mounted between the scintillation crystal and the radiation entry window, a preamplifier, connected to the SDD, electronic devices, being capable of determining the signal rise time of the measured signals and of separating the signals on the basis of said rise time, electronic devices, being capable of separately collecting the energy spectra of SDD and scintillator detection events on the basis of the different rise times.

Dual-range photon detector

The invention relates to a detector for the measurement of ionizing radiation, preferably &#x3b3;-radiation and x-rays, comprising a scintillator and a light detector, the light detector being stabilized by using a predefined light source, preferably a Light Emitting Diode (LED), where the length and/or shape of the light pulses of the light source is different from the length and/or shape of the light pulses emitted by the scintillator. The light source induced pulses and the radiation induced pulses are separated from all other pulses on the basis of their pulse width. The detector is additionally stabilized by correcting the measured light output, that is the pulse height of the output signals, of the detector with the detector temperature shift, being dependant from the average pulse width of the accumulated &#x3b3;-pulses.

Detector for the measurement of ionizing radiation

A method for linearizing a radiation detector is provided, the method including measuring a pulse height spectrum of a predetermined radiation source, identifying at least one spectrum template for the predetermined radiation source, and determining a linearization function by comparing the measured pulse height spectrum with the at least one identified spectrum template. The at least one spectrum template is a predefined synthesized energy spectrum for the predetermined radiation source and for the corresponding radiation detector. Further, a detector for measuring one or more types of radiation is provided, the detector being adapted for transforming the measured pulse height spectrum in an energy-calibrated spectrum, the transformation including a linearization step, where a linearization function used with the linearization step is determined according to the inventive method.

Method for linearizing an energy spectrum of radiation detectors

Method for correction of the temperature dependency of a light quantity L emitted by a light emitting diode (LED), being operated in pulsed mode with substantially constant pulse duration t, and measured in a light detector, using a predetermined parameter X, correlated to the temperature T of the LED in a predetermined ratio, whereby a correction factor K is determined from the parameter X, preferably using a calibration table, especially preferred using an analytic predetermined function, whereby the measured emitted light quantity L is corrected for the temperature contingent fluctuations of the emitted light quantity, whereby the parameter X is determined from at least two output signals of the LED, which are related to each other in a predetermined manner.

Method for stabilizing the temperature dependency of light emission of an LED

A detector for the measurement of radiation, preferably ionizing radiation, includes a medium, means for the conversion of the radiation energy absorbed by the medium into electrical charge, means for digital sampling of the charge signals, means for the determination of a calibration factor K, and means for the stabilization of the output signals of the detector. The medium at least partly absorbs the radiation to be measured. The electric charge is at least partially proportional to the energy of the radiation. The sampling is done preferably with a sampling rate between 1 and 1000 MHz. Further signal processing is digital. The calibration factor K has a fixed relation with respect to the decay time &#x3c4; of the medium. The output signals of the detector are mainly proportional to the radiation energy, and are stabilized with the help of the calibration factor K.

Stabilization of a scintillation detector

The invention relates to a method for stabilizing the signals generated by a scintillation detector for measuring radiation, especially ionizing radiation, using the radiation which is at least partially absorbed in the detector, said signals depending on the operating temperature of the detector. According to said method, the temperature-dependent calibration factor K is determined from the signal shape of the signals generated by the radiation to be measured itself.

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Dresden, Germany

Guntram Pausch