22 results about "High count rate" patented technology

The invention relates to the technical field of electron energy measurement, and discloses an electron spectrometer and an electron energy spectrum measurement method and system.The electron spectrometer comprises a magnetic deflection unit used for receiving an incident to-be-measured electron beam, generating a magnetic field and applying the magnetic field to all to-be-measured electrons in the to-be-measured electron beam; the scintillator fluorescent screen is arranged at the downstream of the magnetic deflection unit and used for receiving the deflected electrons to be detected, and the electrons bombard the scintillator fluorescent screen and generate light spots; the optical acquisition unit is used for acquiring a light spot image on the scintillator fluorescent screen; and the signal processing unit is used for processing the light spot image so as to identify the spatial position information of the light spot in the light spot image and convert the spatial position information into electronic energy data. The method has the beneficial effects that the unification of high resolution and high measurement efficiency is realized, and the problem of signal accumulation under a high counting rate of a traditional direct measurement method and the inherent defect of low efficiency of a scanning type magnetic spectrometer are overcome.

The application discloses a kind of arbitrary waveform nuclear pulse conversion methods, for the trapezoidal shaping of arbitrary waveform nuclear pulse signal.First, the arbitrary waveform nuclear pulse signal is regarded as the impulse response of rational fraction transfer function system.Second, rational fraction transfer function is decomposed into multiple first-order inertia link and the form of sum, then, multiple first-order inertia link and the form of sum is carried out Laplace inverse transformation into time domain expression, and then its time domain expression is discretized and transformed, then the parameter of discretized expression is obtained using particle swarm algorithm, finally, the transfer function of trapezoidal shaping and shaping recurrence formula are obtained, the trapezoidal shaping of arbitrary waveform nuclear pulse signal is realized to a certain extent, the symmetry of trapezoidal pulse is improved, the accurate acquisition of pulse amplitude is facilitated, the energy resolution of system is improved and the counting rate is improved, which has great significance for improving the precision of radioactivity measurement.

The present invention relates to the field of nuclear signal processing technology, and in particular to a nuclear pulse signal processing method, electronic equipment, storage medium and program product. The method comprises: obtaining an accumulated nuclear pulse signal; extracting an available nuclear pulse signal from the accumulated nuclear pulse signal; parsing the available nuclear pulse signal to obtain nuclear pulse signal detection information. The present invention is used to solve the problem of low efficiency in nuclear pulse signal processing in the nuclear radiation measurement process in the prior art, avoid the loss of nuclear radiation counting and increase in time cost caused by directly discarding the accumulated nuclear pulse signal, and improve the processing efficiency of the nuclear pulse signal. Especially under high counting rate conditions, even if the nuclear pulse signal has a pulse accumulation problem, the nuclear pulse signal detection information required by the user can be obtained in the accumulated nuclear pulse signal, thereby improving the detection capability of the pulse and improving the completeness and accuracy of nuclear radiation monitoring.

The invention discloses a neutron sensitive scintillator probe with a high counting rate, a neutron detector and a preparation method, and relates to the technical field of neutron detectors. The neutron sensitive scintillator probe is different from a traditional layered or array structure, a neutron sensitive material and a scintillation luminescent material which are uniformly mixed are adopted as a probe main body, the neutron sensitive material and incident neutrons are subjected to nuclear reaction to generate secondary charged particles, the secondary charged particles are energy-deposited in the scintillation luminescent material, and the neutron sensitive material and the scintillation luminescent material are separated from each other. The scintillation luminescent material is excited to emit scintillation light, so that the signal transmission time is reduced, the counting rate of the detector is improved, and the detector has the advantages of strong anti-interference capability and small size.

The invention relates to the technical field of radiation detection, in particular to a gamma ray detector and a gamma ray detection system. The detector comprises a substrate, a shading shell, a scintillation crystal, a silicon photomultiplier tube array, a first reflecting layer and a second reflecting layer, the shading shell is connected with the substrate so as to define an open inner cavity with the substrate; the scintillation crystal is located in the open inner cavity; the silicon photomultiplier tube array is located in the open inner cavity and is coupled with the scintillation crystal through an adhesive, and the silicon photomultiplier tube array is connected with the substrate to obtain electric energy; the first reflecting layer is arranged around the scintillation crystal; and the second reflecting layer is connected with a cavity opening of the open inner cavity to form a sealing structure. The invention has the advantages of magnetic interference resistance, miniaturization and high counting rate.

The present invention relates to a neutron gamma stacking waveform identification method, and specifically to a neutron gamma pulse waveform stacking identification method under high counting rate conditions. The method solves the technical problem that existing neutron gamma waveform identification methods do not consider the change of the neutron gamma waveform trailing edge, resulting in a low accuracy rate. The neutron gamma pulse waveform stacking identification method under high counting rate conditions includes the following steps: 1) collecting and storing neutron gamma single waveform mixed signals; 2) obtaining a neutron data set and a gamma data set S1; 3) constructing a test set P1 of neutron gamma stacking waveforms; 4) obtaining a neutron data set and a gamma data set S2; 5) constructing a feature parameter set T; 6) constructing a training set sample library P2; 7) constructing a training data set P3; 8) training a neural network, using the trained neural network to identify all waveforms in the test set P1 and output their predicted labels, thereby completing neutron gamma pulse waveform stacking identification under high counting rate conditions.

The invention provides a self-adaptive high-counting-rate silicon-based single-photon avalanche photoelectric detection system which comprises a silicon-based single-photon avalanche photodiode, an analog-to-digital conversion module, a counting module, a current detection module, an active quenching and active recovery module, a passive quenching and active recovery module and a quenching mode self-adaptive module. An avalanche signal can be counted through a counting module to generate a first gating condition, an avalanche current is extracted through a current detection module to generate a second gating condition, and a gating signal is generated based on the two gating conditions through a quenching mode self-adaptive module, so that self-adaptive switching between an active quenching active recovery mode and a passive quenching active recovery mode is realized; and the performance limitation in the prior art is effectively broken through. An active quenching and active recovery mode can be maintained in a weak light scene, and high detection sensitivity is guaranteed; the passive quenching and active recovery mode can be switched in a strong light scene, avalanche termination is quickly realized, the quenching time is greatly shortened, the high counting rate is guaranteed, and stable detection in a full light intensity range is realized.

The invention discloses an SDD high-counting-rate pulse signal processing method, system and device and a medium, and belongs to the field of digital signal processing.The method comprises the steps that pulse charges output by an SDD are read in real time through a transistor reset type pre-amplifier, and original step voltage signals are output according to the pulse charges; acquiring, converting and outputting an original step voltage signal into a first digital signal in real time through a first channel; collecting, converting and outputting the effective voltage signal into a second digital signal in real time through a second channel; wherein the effective voltage signal is obtained by subtracting the bias voltage signal from the original step voltage signal; when the second digital signal is greater than or equal to a first preset threshold value, processing the first digital signal through a bias following algorithm to update a bias voltage signal output by the digital-to-analog converter; and processing the second digital signal output by the second channel in real time through a preset digital signal processing algorithm. According to the invention, the problem of low resolution of an SDD system under a high counting rate can be solved.

The invention discloses a dual-channel forming method and system for nuclear signal processing. The method comprises the following steps: carrying out parallel processing on a digital nuclear pulse signal; the flat tip peak is formed to generate a signal with a flat top and a narrow pulse width feature, the flat top provides a stable sampling window to resist ballistic loss, and the narrow pulse width effectively reduces the pulse accumulation probability under a high counting rate; accurate timing triggering is achieved through symmetrical zero-area trapezoid forming by means of the stable zero crossing point characteristic that the output waveform is irrelevant to the input amplitude, the zero-area characteristic of symmetrical zero-area trapezoid forming further provides automatic baseline recovery capacity, and the defect that a traditional triggering mode is affected by amplitude fluctuation and baseline drift is overcome. Carrying out accumulation discrimination based on the zero crossing point signal to determine an effective event, and obtaining a net amplitude value at the peak value of the flat tip peak signal through delay sampling; therefore, the problem that energy and timing precision are difficult to consider in nuclear signal processing is effectively solved, and synchronous improvement of energy extraction precision and timing reliability at a high counting rate is realized.

The application discloses a kind of based on multi-chip splicing's detector and signal processing method related to the technical field of synchrotron radiation and X-ray spectroscopy, detector includes: detector array module includes a plurality of semiconductor detection chips arranged on substrate, to seamlessly splicing mode arrangement forms continuous detection surface, for converting received incident radiation signal into charge signal;Packaging module is used to provide temperature control and environmental isolation for detector array module Working environment;Readout circuit module is electrically connected to detector array module, for preamplification to the charge signal output by detector array module and conversion into voltage signal;Digital signal processing module is used for digital processing to voltage signal, and is configured with parallel processing logic respectively for executing pulse pile-up discrimination and energy extraction processing.The surface array detector and signal processing method can realize stable collection and high-precision energy information acquisition of incident radiation signal under high count rate conditions.

The invention discloses a high-counting-rate X-ray tube device which comprises a shell, a lead plate is fixed to the inner wall of the shell, the shell is composed of a top cover, a wall barrel and a bottom cover, and an X-ray outlet hole is formed in the wall barrel; a heat sink; the low-voltage interface device is fixedly connected with the top cover; one end of the X-ray tube core is connected with the low-voltage interface device, and the other end of the X-ray tube core is fixedly connected with the radiator; one end of the high-voltage connecting device is fixedly connected with the top cover, and the other end of the high-voltage connecting device is fixedly connected with the radiator; the bottom in the insulating sleeve is fixedly connected with the radiator; the expansion and contraction device is arranged between the insulation sleeve and the bottom cover, the space between the expansion and contraction device and the top cover is filled with transformer oil, and the expansion and contraction device is fixed by the inner ring fixer. According to the scheme, the X-ray tube device with the high counting rate can be ensured to continuously work at the temperature of-10 DEG C to 55 DEG C for a long time, the vacuum degree of an X-ray tube core can be protected, and risks such as arc discharge or X-ray tube breakdown can be avoided.

The present invention relates to the field of accelerator beam diagnostic technology, and in particular to a scintillator detector for measuring slow extraction beam microstructures. The scintillator detector comprises: a scintillator configured as a rectangular plate for receiving a beam to generate photons; a SiPM array for receiving the photons generated by the scintillator and outputting electrical signals; and a SiPM processing circuit for performing summation and inverse processing on the electrical signals. The detector also comprises a support shell for mounting the above components, one end of the support shell being configured as a cylindrical shell and the other end of the support shell being configured as a rectangular shell; the SiPM array being mounted in the rectangular shell, and the SiPM processing circuit being mounted in the cylindrical shell and electrically connected to the SiPM array; one end of the scintillator being embedded in the rectangular shell and connected to the SiPM array, and the other end of the scintillator being cantilevered away from the cylindrical shell, thereby reducing the size of the scintillator detector, lowering power consumption, and making it suitable for high count rate measurements.

The present invention discloses a jitter calibration system and method for a superconducting nanowire single photon detector, including an FPGA platform for generating a periodic pulse calibration signal, a radio frequency pulse amplifier, a lithium niobate electro-optic modulator and its bias voltage controller, a 1550nm 3kHz linewidth distributed feedback laser, a programmable optical attenuator, a three-paddle polarization controller, an SNSPD single photon detector, a multi-channel TDC module, and a host computer for processing data. The calibration method is simple and has a low cost. It can calibrate the correction curve of the relationship between the additional jitter of the SNSPD detected photons caused by pulse pile-up and the detection recovery time, and compensate for the additional jitter, effectively solving the problem of jitter deterioration of the SNSPD at high counting rates in high-speed detection applications.

The invention discloses a high-speed nuclear pulse signal acquisition system and method for multiple measurement of fast neutrons, and the system mainly consists of a pre-amplification module, a high-speed acquisition module, a synchronous triggering module, an Ethernet communication module, a high-voltage power module, and a low-voltage power module. According to the acquisition system, multiple paths of synchronous trigger signals are fanned out through the synchronous trigger module and serve as time starting signals of nuclear pulse sequences acquired by the high-speed acquisition module, then time starting points of all the nuclear pulse signals are synchronized, and the time interval between the time starting signals and the subsequent nuclear pulse sequences is calculated, so that the nuclear pulse sequences are acquired. Therefore, all nuclear pulse signals are marked with ns-level timestamps, and accurate collection of nuclear pulse time information is finally realized. According to the invention, the collection efficiency and collection precision of the high-speed nuclear pulse signal under the conditions of high counting rate and high case rate are obviously improved, and the accuracy of nuclear material nondestructive testing is further improved.

The present invention provides a ray spectrum monitoring system and a spectrum correction method. The ray spectrometer includes three parts: a detector, a signal processing electronics system and a back-end data acquisition system, and also includes a spectrum monitoring system. The spectrum monitoring system generates one or more reference signals with a pulse shape similar to that of a signal to be measured and with adjustable amplitude and frequency. By changing the parameters of the reference signal, the characteristic drift matrix of the entire ray spectrometer is calibrated, and then used for monitoring and correction of the spectrum data. The spectrum monitoring system and correction method proposed in the present invention can solve the problems of unknown error degree and error correction of ray spectrum data. Especially in complex ray spectrum measurement conditions such as high counting rate and strong magnetic field, the ray spectrum monitoring and correction method proposed in the present invention can monitor the quality of spectrum data in real time and greatly reduce the error of spectrum data, which is of great significance and value.

The present application relates to the technical field of neutron imaging and detection, in particular to a data processing method for a neutron imaging detector based on microchannel plates (MCP), and more particularly to a waveform analysis and event reconstruction algorithm for white-light neutron resonance imaging; comprising a waveform analysis step and an event reconstruction step, wherein the waveform analysis step uses advanced waveform recognition technology to perform offline analysis on the signal waveforms on the anode plate of the neutron imaging detector, accurately identifying the signal waveform of each electron group; the event reconstruction step is based on the waveform analysis results, grouping and pairing the signals, and constructing an accurate position reconstruction model to obtain the accurate coordinates of the electron group hit position; not only improves the imaging accuracy and count rate, but also optimizes the data processing flow, adapts to high count rate conditions, improves the overall performance of the system, and expands the application field, which will provide strong support for the development and application of neutron imaging technology.

The present invention proposes a method for monitoring phase perturbation in a TF-QKD system, as well as a TF-QKD method and system for achieving phase stability thereby, which allows the detection function in the TF-QKD system to be realized by means of an avalanche detector, and at the same time can meet the high signal-to-noise ratio of the quantum optical signal and the high count rate of the phase reference optical signal.

The invention relates to the technical field of accelerator beam diagnosis, in particular to a scintillator detector for measuring a slow extraction beam microstructure. The scintillator detector comprises a scintillator which is a rectangular plate and is used for receiving beam current to generate photons; the SiPM array is used for receiving photons generated by the scintillator and outputting electric signals; the SiPM processing circuit is used for performing summation processing and reverse processing on the electric signals; the supporting shell is used for installing all the components, one end of the supporting shell is arranged to be a cylindrical shell, and the other end of the supporting shell is arranged to be a rectangular shell; the SiPM array is arranged on the rectangular shell, and the SiPM processing circuit is arranged on the cylindrical shell and is electrically connected with the SiPM array; one end of the scintillator is embedded into the rectangular shell and is connected with the SiPM array, and the other end of the scintillator overhangs in a direction deviating from the cylindrical shell, so that the size of the scintillator detector is reduced, the power consumption is reduced, and the scintillator detector is suitable for high-counting-rate measurement.

The utility model discloses a high-counting-rate X-ray tube device, and the device comprises a housing which is composed of a top cover, a wall barrel and a bottom cover, and the wall barrel is provided with an X-ray outlet hole; a heat sink; the low-voltage interface device is fixedly connected with the top cover; one end of the X-ray tube core is connected with the low-voltage interface device, and the other end of the X-ray tube core is fixedly connected with the radiator; one end of the high-voltage connecting device is fixedly connected with the top cover, and the other end of the high-voltage connecting device is fixedly connected with the radiator; the bottom in the insulating sleeve is fixedly connected with the radiator; the expansion and contraction device is arranged between the insulation sleeve and the bottom cover, the space between the expansion and contraction device and the top cover is filled with transformer oil, and the expansion and contraction device is fixed by the inner ring fixer. According to the scheme, the X-ray tube device with the high counting rate can be ensured to continuously work at the temperature of-10 DEG C to 55 DEG C for a long time, the vacuum degree of an X-ray tube core can be protected, and risks such as arc discharge or X-ray tube breakdown can be avoided.

The invention discloses a detector based on multi-chip splicing and a signal processing method, and relates to the technical field of synchrotron radiation and X-ray spectroscopy, and the detector comprises a detector array module which comprises a plurality of semiconductor detection chips arranged on a substrate, and the semiconductor detection chips are arranged in a seamless splicing manner to form a continuous detection surface; the signal conversion module is used for converting a received incident radiation signal into a charge signal; the packaging module is used for providing a working environment for temperature control and environment isolation for the detector array module; the reading circuit module is electrically connected to the detector array module and is used for pre-amplifying a charge signal output by the detector array module and converting the charge signal into a voltage signal; and the digital signal processing module is used for carrying out digital processing on the voltage signal and is provided with parallel processing logics which are respectively used for executing pulse accumulation judgment and energy extraction processing. By adopting the area array detector and the signal processing method, stable acquisition of incident radiation signals and high-precision energy information acquisition can be realized under the condition of high counting rate.

The invention relates to nuclear radiation detection equipment and a signal conditioning circuit thereof, and the circuit comprises a pre-amplification unit which is used for amplifying and isolating a detection signal and outputting a first amplified signal; the filtering forming unit is connected with the pre-amplification unit and is used for conditioning the first amplified signal into a narrow pulse signal; the main amplifying unit is connected with the filtering and forming unit and is used for conditioning the narrow pulse signal into a second amplified signal; and the discrimination unit is connected with the main amplification unit and is used for discriminating the pulses to be counted and the noise of the second amplified signal and outputting a counting signal representing the number of the pulses to be counted and the number of the noise of the second amplified signal. According to the invention, accumulation of pulse signals at a high counting rate can be eliminated, the energy spectrum resolution is improved, and interference caused by tiny vibration is eliminated.

The invention relates to the technical field of particle detection, and provides a particle detector signal pulse shape analysis method based on a Hanning filtering and differential algorithm. Aiming at the problem that a detector signal is easily interfered by high-frequency noise and low-frequency oscillation, the method adopts a Hanning filtering function to eliminate the high-frequency noise, and adopts a differential algorithm to counteract baseline low-frequency oscillation, so that the signal-to-noise ratio of the signal is remarkably improved, the time resolution is improved, and the amplitude measurement error is reduced; meanwhile, through a triple screening mechanism of setting a positive and negative threshold crossing sequence, threshold interval upper bound limitation and a positive and negative extreme value ratio threshold, real particle signals and noise pulses are accurately distinguished, and the misjudgment rate is greatly reduced; besides, the method is low in calculation complexity, is suitable for different types of detectors and nanosecond-level to microsecond-level signal pulses, meets the requirements of high-counting-rate experiments, and improves the accuracy of experimental research results.