38 results about "Pulse height" patented technology

High-power- (HP-) generator (10) configured to deliver high power with a high value of voltage and / or high current value to a pulsing unit (3), wherein the pulsing unit (3) is configured to deliver pulsed high power with a high value of voltage and / or high current with pulse-high-duration of 10 µs or less and pulse- low-duration of 10 µs or less to a capacitive load, in particular to a plasma process, the HP-generator (10) comprises: - a control input (11), configured to be connected to a control signal from an external pulsing control (9), wherein the pulsing control (9) also controls a pulse-high-duration and a pulse-low-duration of the pulsing unit (3), - a control unit (22) configured to adjust the output of the HP-generator (10) responsive to the signal at the control input (11) in a way that the output voltage and / or current of the HP-generator (10) may be changed during a pulse-low-duration and is constant during the following pulse-high-duration of a pulse at the output of the pulsing unit (3)

Method for determining a switch current in an electronic current and / or voltage converter, in particular in an inverter, comprising: - energizing (101) a measuring section (11) with a switch current flowing through a semiconductor switching element of a half-bridge installed in a current and / or voltage converter, wherein the measuring section (11) has a parasitic inductance (14) and a parasitic resistance (16); - measuring (102) a voltage drop across the measuring section (11); - integrating (103) the voltage drop by means of an active low-pass filter (21) in order to obtain a profile of an integrated voltage as a function of an energization time; - determining (104) three data points from the time course of the integrated voltage and reading out three associated value pairs for the respective data points; - inserting (105) the value pairs into a system of equations which describes the integrated voltage as a function of the energization time, wherein the function contains one or more coefficients which are dependent on the magnitude of the switch current, preferably on a pulse height of the switch current, further preferably additionally on the parasitic inductance and / or a gain factor of the active low-pass filter; - Calculating (106) the coefficient(s) to determine the magnitude or pulse height of the switch current.

To improve data retention characteristics of a semiconductor device using a variable resistance element.SOLUTION: A semiconductor device includes a variable resistance element whose resistance state changes according to a direction of a voltage applied between two electrodes, and a control circuit. The control circuit applies a plurality of pulses of a first polarity to the variable resistance element in a set sequence for changing the variable resistance element to a low resistance state. M pulses from an X-th pulse to an (X+M-1)-th pulse among the plurality of pulses of the first polarity have a pulse height higher than that of the immediately preceding pulse.SELECTED DRAWING: Figure 5

A system (100), method and computer program product for estimating peak intensity in a pulse height spectrum obtained by a wavelength dispersive x-ray fluorescence spectrometer is disclosed. The pulse height spectrum (212) is obtained from a sample (202) by a multi-channel analyzer (205) of the wavelength dispersive x-ray fluorescence spectrometer (200). A model generator (120) generates a pulse height spectrum model (112) by creating a plurality of diffraction order profiles with predefined profile shapes at photon energy positions corresponding to corresponding diffraction orders of a monochromator (203) of the spectrometer (200). For each created diffraction order profile where the corresponding photon energy is above the edge energy of the detector material of the detector, a corresponding escape profile is added. A model adjustment module (130) uses a fitting algorithm (FA1) to adjust pulse height to energy mapping parameters and a contribution area of ​​each diffraction order profile set of the pulse height spectrum model to minimize the difference between the pulse height spectrum model (112) and the measured pulse height spectrum (212). The intensity module (140) provides the contribution area of ​​the first-order profile set as the intensity (EI1) of energy to be determined by the wavelength dispersive X-ray fluorescence spectrometer (200).

The invention provides a pulse control method and system for a laser marking process, and the method comprises the steps: enabling laser to emit light according to a certain light emitting frequency, and enabling the light to be turned off intermittently; in the light turn-off time period, a compensation current is applied to the laser through the pumping source, the magnitude of the compensation current is determined according to the length of the light turn-off time, and the shorter the light turn-off time is, the lower the compensation current is; the compensation current adopts a segmented compensation mode; along with the prolonging of the light turn-off time, the magnitude of the compensation current is increased in a stepped manner; and if the compensation current reaches the preset stable value and the light turn-off time is still not finished, maintaining the preset stable value by the compensation current until the light turn-off is finished. In the light-off time period of the laser, the compensation current is applied through the pumping source, so that the light-emitting pulse height of the laser tends to be consistent under the condition of any interval time, the flexibility of different light-emitting requirements of the laser is improved, and the machining precision of complex patterns is improved.

A time-discriminated scintillator light output measurement method is disclosed: The scintillator light generated by the sample under test under radiation source excitation is converted into an electrical signal; the electrical signal is amplified, and the rise time and pulse height of the digitized waveform are discriminated, acquired, and stored, or the long-gate integral value Qlong and the short-gate integral value Qshort are obtained. The pulse discrimination value PSD is obtained based on the long-gate integral value Qlong and the short-gate integral value Qshort; a two-dimensional distribution histogram of the low-light-output scintillator is generated with Qlong as the abscissa and PSD as the ordinate; the obtained two-dimensional distribution histogram is processed accordingly and projected onto the X-axis to obtain the scintillator energy spectrum; the full-energy peak in the energy spectrum is Gaussian fitted to obtain the center value and half-peak width, and then the light output and energy resolution of the scintillator are calculated. This invention can accurately detect and calibrate scintillator signals with low light output, with fast data acquisition speed and high output accuracy.

A power amplifier based reciprocal quantum logic (RQL) bias level sensor is used to measure and / or calibrate bias parameters of an AC bias signal and / or a DC bias signal supplied to an RQL circuit. The bias signal may include an output amplifier output bias current. The bias level sensor includes a stack of DC SQUIDs, with inputs supplied from the outputs of respective Josephson transmission lines (JTLs) that transformer-couple the SQUIDs. By stepping the relative strengths of the bias taps of the JTLs or the critical currents of the Josephson junctions in the DC SQUIDs, the output voltage signal of the bias level sensor can indicate whether the supplied bias value is an improved or optimized bias value when varied over a range. The outputs of two such bias level sensors driven by I and Q clocks can be compared to adjust the AC bias amplitude of the clocks. The relative clock phases can be adjusted as well.

This invention proposes a method and system for detecting the operational status of a controlled fusion device, belonging to the field of controlled fusion device operational status detection technology. The method includes: obtaining a pulse height spectrum based on measurement results from a liquid scintillator detector; normalizing the count values ​​for each channel address; inputting the normalized pulse height spectrum data into a Bayesian neural network model for forward propagation calculation. The training process includes: constructing a neutron response matrix by combining Monte Carlo simulation and experimental calibration; generating a set of simulated neutron energy spectra based on preset basis functions; generating a set of simulated pulse height spectra by convolving the neutron response matrix with the set of simulated neutron energy spectra; training a neural network model with weight parameters following a probability distribution using Bayesian inference based on data pairs; and performing an inverse transform on the model output to obtain the incident neutron energy spectrum distribution. This invention improves the stability and accuracy of neutron energy spectrum interpretation and provides quantitative information on the uncertainty of the inversion results.

This invention provides a method for molding a memory cell, the memory cell including a word line terminal and a bit line terminal, and molding is performed by applying a reference voltage to the bit line terminal. The molding method includes: a molding step, in which an enable voltage is applied to the word line terminal, and a molding voltage with a pulse height higher than the reference voltage and a pulse width lower than the reference voltage is applied to the bit line terminal; a reading step, in which a first reading voltage is applied to the bit line terminal to read the device resistance value of the memory cell; and a detection step, in which the molding operation is determined to be successful when the device resistance value is less than or equal to the standard resistance value.

An illumination device having a light-emitting diode field and an adjustable current source for each LED. The current source delivers a pulse width modulated current having a pulse height. An open-loop / closed-loop controller is provided for the open-loop / closed-loop control of the brightness of the LEDs. A setpoint value for the pulse height can be produced for the current source. A brightness value can be specified for each LED in accordance with the setpoint value, encoded in a video signal, and provided at a video signal output. The light-emitting diode field has a decoder, which is connected to the video signal input and via which the brightness value can be decoded from the video signal and converted into a duty cycle with which the pulse height can be produced.

The present invention relates to a device, system and method for determining pulse pressure variation of a subject. To enable more reliably determining pulse pressure variation of a subject the device comprises a signal input (11) configured to obtain an input signal representing a hemodynamic signal of the subject, a processor (12) configured to process the input signal and compute a pulse pressure variation and a signal output (13) configured to output the computed pulse pressure variation. The pulse pressure variation is computed by deriving a pulse height signal from the input signal, deriving a pulse height baseline and a de-trended pulse height signal from the pulse height signal as the ratio between the difference between extrema of the de-trended pulse height signal and the respective value of the pulse height baseline signal, and computing the pulse pressure variation from the de-trended pulse height signal and the pulse height baseline.

The invention discloses a near-infrared scintillator performance testing device and method, and belongs to the technical field of scintillator irradiation detection. A near-infrared sensitive silicon photomultiplier is adopted to replace a PMT, and in combination with a reading circuit (Sent Company) and a digital spectrometer, a set of test system covering the wave band of 270-900 nm is constructed. The number of SiPM single-photon response channels is determined through a multi-photon spectrum test, X-rays are utilized to excite a scintillator, a pulse height spectrum is collected, data are analyzed in combination with ROOT software, and key performance parameters such as light yield, energy resolution and decay time are calculated. The test method comprises the steps of SiPM multi-photon spectrum calibration, scintillator near-infrared luminescence verification, optical coupling and radioactive source excitation, signal digital acquisition and off-line processing. The system breaks through the limitation of traditional visible light detection, achieves efficient detection of the performance of the near-infrared scintillator, has the advantages of being simple in structure, wide in wave band coverage, capable of synchronously obtaining energy and time information and the like, and is suitable for the fields of medical imaging, radiation monitoring and the like.

This invention discloses an ASIC chip with an energy response self-calibration module, comprising a multi-pixel channel array containing N independent pixel channels. Each pixel channel includes a charge-sensitive amplifier module, a shaping circuit, a pulse energy discrimination module, and a counting module. The pulse energy discrimination module has a built-in comparator. The chip also includes an energy response self-calibration module, comprising a test pulse generator, a reference voltage control submodule, and a calibration logic control submodule. By controlling the pulse height and the magnitude of the reference voltage Vref, the S-curves of each pixel channel corresponding to different test pulse heights are obtained. Based on a preset calibration algorithm, the polynomial coefficients of the reference voltage and the calibrated DAC value for each pixel channel are calculated and stored. This invention enables consistent energy response across all pixel channels of the ASIC, and allows the calibration coefficients to be read after self-calibration to determine the differences between the ASIC channels.

To provide a radiation detection element and radiation detector, which offer reduced noise in wave-height spectrum measurement.SOLUTION: The challenge is overcome by employing a radiation detection element comprising a specific coating layer in addition to a substrate containing a semiconductor and electrodes.SELECTED DRAWING: Figure 1

A power amplifier based reciprocal quantum logic (RQL) bias level sensor is used to measure and / or calibrate bias parameters of an AC bias signal and / or a DC bias signal supplied to an RQL circuit. The bias signal may include an output amplifier output bias current. The bias level sensor includes a stack of DC SQUIDs, with inputs supplied from the outputs of respective Josephson transmission lines (JTLs) that transformer-couple the SQUIDs. By stepping the relative strengths of the bias taps of the JTLs or the critical currents of the Josephson junctions in the DC SQUIDs, the output voltage signal of the bias level sensor can indicate whether the supplied bias value is an improved or optimized bias value when varied over a range. The outputs of two such bias level sensors driven by I and Q clocks can be compared to adjust the AC bias amplitude of the clocks. The relative clock phases can be adjusted as well.

The invention provides a three-dimensional pulse signal quantitative analysis method and system, and belongs to the technical field of signal processing. Through a binocular vision pulse image acquisition system, continuous contact membrane images of a traditional Chinese medicine pulse condition training instrument at a radial artery are acquired, a three-dimensional pulse signal is reconstructed, ROI region selection is performed, and a pulse condition is obtained. Obtaining a central region containing effective components of the three-dimensional pulse signal; segmenting the three-dimensional pulse signal into a plurality of two-dimensional slices by utilizing dynamic waveform slices to obtain a dynamic slice sequence; a composite sine cascade modeling model is used for fitting two-dimensional signals with sine similarity characteristics in a dynamic slice sequence, the pulse length, the pulse width and the pulse height of the pulse signals are determined, dynamic waveform slices are used, the three-dimensional pulse signals are subjected to dimensionality reduction to two-dimensional slices, the data size is reduced, and through composite sine cascade modeling, the accuracy of pulse signal processing is improved. Compared with a one-dimensional time sequence mode, the pulse analysis method has the advantage that the pulse analysis effect is effectively improved.

To automatically measure radiation more accurately than before.SOLUTION: According to an embodiment, a radiation measurement system 200 includes a radiation detector 1, a preamplifier 2, and a radiation measurement adjustment device 100. The radiation measurement adjustment device 100 includes a high-speed waveform shaping amplifier 111, a pulse height discriminator 112 that discriminates a high-speed waveform signal and outputs a high-level signal, a trigger generator 113 that outputs a trigger signal after a predetermined delay time from the output of the high-level signal, a low-speed waveform shaping amplifier 121, a sample-and-hold device 122 that outputs an instantaneous value of a low-speed waveform signal at the time of the output of the trigger signal as a sample value, and an AD converter 123. This device is provided with a delay time adjusting part 130 for deriving the dependent characteristics of a digital sample value on a delay time, selecting an optimum delay time and defining it as the delay time of a trigger generator 113.SELECTED DRAWING: Figure 1

The invention provides a target detection method based on pulse signals, a detection system, equipment and a medium, and the detection method comprises the steps: obtaining n * m image resolution and collection frequency, setting the number of sampling frames, obtaining a collection data set through collection of pulse data, obtaining a pulse data stream set through the collection data set, taking pixels as a unit, and obtaining a pulse data stream set through the collection data set; the pulse data stream set is recombined according to the frame header information to obtain a recombined image, the image comprises n * m pixels, the pulse signal length of each pixel is the same as the sampling frame number, a recombined atlas set is generated according to the recombined image, and the recombined atlas set comprises a pulse height atlas, used for reflecting the process that a target passes through the pixel, of each pixel; and finally, obtaining target position information according to the recombination map set. According to the invention, target detection is directly carried out in the pulse domain, and through pulse domain image detection, the calculation amount of the image domain can be greatly reduced, the data operation pressure is reduced, the target detection speed is improved, and the target detection capability of the system is enhanced.

The invention relates to a lighting device having a light emitting diode array comprising an adjustable current source for each LED, which provides a pulse width modulated current with a pulse height, a control / regulation device for controlling / regulating the brightness of the individual LEDs, which can generate a theoretical value for the pulse height for the current source, and the brightness value can be set for each LED in accordance with the theoretical value and can be encoded in a video signal and can be provided on a video signal output, the light emitting diode array having a video signal input, the light emitting diode array having a decoding device connected to the video signal input, with which the brightness value can be decoded from the video signal and can be converted into a duty cycle, with which the pulse height can be generated, the theoretical value for the pulse height likewise being encoded in the video signal or decoded from the video signal and can be used by the current source for adjusting the current height.

The invention provides an optical fiber laser pulse height compensation method and system, and the method comprises the steps: enabling pump light of a pump source to be coupled with seed light outputted by a seed source module in an amplification module, and achieving the amplification through a gain optical fiber, and obtaining a laser pulse outputted by an optical fiber laser; the pumping source is started, a pre-current is injected into the gain fiber in advance, and the time is maintained for t1; the pumping source is controlled, overshoot current is injected into the gain optical fiber for a certain time, and then main current is continuously output; the duration and the magnitude change of the overshoot current enable the pulse generated after the pre-current is applied to be sunken; and starting the seed source module, wherein the time for starting the seed source module is equal to or later than the time for just injecting the overshoot current. Under the condition that output parameters of a seed source are not changed and low-absorption-coefficient optical fibers are not limited, the problem of pulse front-section sequence sag is compensated only according to a pumping driving mode from gain optical fiber amplification and loss mutual curves.

To obtain a neutron detector capable of measuring high dose neutrons with high neutron / gamma-ray discrimination ability and high efficiency.A scintillator 10 has a layered structure in which a phosphor layer 11 and a light transmission layer 12 are alternately laminated in z direction. The phosphor layer 11 is made of a phosphor material emitting fluorescent light by absorbing neutrons, the material being, for example, a scintillator material used in neutron detectors having already been known. The light transmission layer 12 is made of a material highly transmitting fluorescent light emitted by the phosphor material and only slightly absorbing neutrons. In the scintillator 10, when neutrons and gamma-ray photons enter it, luminescence intensity (pulse height) due to neutrons is significantly different from that due to gamma-ray photons. It makes it easy to discriminate between outputs due to the two kinds of radiations.

The invention discloses a target detection method and system based on pulse vision, and relates to the technical field of target detection.The method comprises the steps that the pulse height of each pulse in an obtained pulse sequence matrix is determined, and a maximum light intensity difference matrix is determined; the pulse sequence matrix can record the time and pulse width corresponding to all pulses of each pixel of the image in a preset time period, and the maximum light intensity difference matrix records the maximum light intensity difference of each pixel; performing threshold binarization on the processed maximum light intensity difference matrix through a self-adaptively calculated threshold to obtain a binarized light intensity difference matrix; performing median filtering on the binarized light intensity difference matrix to obtain a filtered matrix; and calculating the position and time of the target by taking the intersection of the filtered matrix and the binarized light intensity difference matrix. The method can capture the micro-motion change of the unmanned aerial vehicle target, detects the position of the unmanned aerial vehicle target in the time period, achieves the effect of pixel-level target detection, and greatly improves the detection probability of the low-weak feature unmanned aerial vehicle target.

The present application provides a time-based energy acquisition method, apparatus, and readable storage medium, relating to the field of signal processing. The method includes: acquiring a detector pulse signal generated by a ray detector detecting rays; sequentially performing timing processing and delay processing on the leading edge of the detector pulse signal to generate a delay signal, and obtaining a ramp voltage according to the delay signal; obtaining a constant voltage according to the detector pulse signal, the voltage value of the constant voltage being equal to the pulse height of the detector pulse signal or a constant voltage linearly related to the pulse height of the detector pulse signal; comparing the ramp voltage with the constant voltage to generate an energy trigger signal; acquiring a first time interval between the generation time of the delay signal and the generation time of the energy trigger signal, and determining the energy of the rays according to the first time interval, the first time interval being linearly related to the pulse height of the detector pulse signal, and the pulse height of the detector pulse signal being linearly related to the energy of the rays.

The present invention relates to the field of particle or aerosol detection. The gas particle or aerosol detector of the present invention adopts non-contact particle or aerosol measurement technology. When the gas passes through the gas channel of the quartz glass tube, each particle or aerosol in the gas will cause the intensity of the laser main beam to drop instantly, generating a negative pulse signal on the photoresistance detector; at the same time, the particle or aerosol also generates scattered light, generating a positive pulse signal on the scattered light detector; the height and width of these two pulses are proportional to the diameter of the particle or aerosol, and the number of pulses is the number of particles or aerosols. The gas particle or aerosol detection method of the present invention expands the range of the gas particle or aerosol detection system and improves the measurement accuracy by complementing and verifying each other through two signals; through decompression and non-contact detection, continuous measurement of other components of high-pressure gas is achieved, and detection efficiency is improved.

The application discloses a particle counting system and method, a first optical sensor is arranged on the side of a measuring light beam for receiving a particle scattering light signal in an air flow; a second optical sensor is used for detecting a light intensity signal of a light beam of a light source; a light beam control board adjusts the output power of the light source according to the light intensity signal detected by the second optical sensor, so that the light intensity of the light beam is constant; an air flow speed detection assembly detects the air flow speed flowing through a light chamber; a main control board adjusts the air flow speed according to the feedback data of the air flow speed detection assembly, so that the air flow speed is constant, or the particle scattering light intensity is corrected in real time according to the air flow speed; a high-speed data acquisition and processing module acquires an electric signal corresponding to the particle scattering light in real time and detects a signal baseline in real time, and the absolute intensity of the particle scattering light is obtained according to the difference between the particle pulse height and the baseline, and the particle size is distinguished based on the absolute intensity, so as to eliminate the particle size discrimination error caused by the baseline fluctuation. The scheme can guarantee the stability of 50% counting efficiency.

The embodiment of the application discloses an elevator control method and device based on a magnetic scale and a medium, and is used in the technical field of elevator control. The method comprises the following steps: controlling the elevator to run at a preset speed to obtain a plurality of leveling positions in the running direction of the elevator; determining the floor positions corresponding to the plurality of leveling positions, determining the magnetic scale height of each floor and the pulse height between adjacent floors based on the floor positions; determining the effective conditions of the leveling signal, the upper and lower limit signals and the upper and lower forced signals of the elevator through the position of the magnetic scale and the magnetic scale height; and controlling the running of the elevator within the corresponding pulse height based on the effective conditions of the leveling signal, the upper and lower limit signals and the upper and lower forced signals of the elevator, so that the height signal of the magnetic scale does not need to be converted into the pulse signal of the encoder, and the influence of the leveling of the elevator due to conversion accuracy is effectively avoided.

The present invention relates to a neutron detector capable of measuring a high dose of neutrons with high efficiency and n / γ selection capability. The scintillator (10) has a laminated structure in which a phosphor layer (11) and a light-transmitting layer (12) are alternately laminated in the z direction. The phosphor layer (11) is made of a phosphorous material emitting fluorescent light by absorbing neutrons, the material being, for example, a scintillator material used in previously known neutron detectors. The light-transmitting layer (12) is made of a material having a high transmittance for fluorescent light emitted by the phosphor and only weakly absorbing neutrons.In the scintillator (10), when neutrons and gamma-ray photons enter it, the intensity of the luminescence (pulse height) due to the neutrons is significantly different from that due to the gamma-ray photons. It is thus easy to distinguish the outputs of the two types of radiation. Figure for abstract: Fig. 1B.

The invention provides a pulse signal data processing method and system, and a terminal, and the method comprises the steps: carrying out the unsupervised clustering of the pulse height value of each pulse signal through a Gaussian mixture model, and calculating a target contraction covariance matrix of a noise signal data set through employing a Leidoit-Wolf contraction covariance estimation method, so as to achieve the calculation of the target contraction covariance matrix based on a minimum Mahalanobis distance criterion. The optimal pulse height fitting factor of each pulse signal is calculated, and the pulse height value of each pulse signal is corrected according to the optimal pulse height fitting factor, so that the technical problem that the existing pulse signal noise suppression technology is difficult to meet various noise suppression requirements of multi-energy radiation and dynamic radiation scenes is solved; the method improves the correction precision of the pulse height value and the signal-to-noise ratio of the pulse signal, can improve the discrimination capability of the superconducting phase-change edge detector on the pulse signal and the energy analysis accuracy of the to-be-detected sample when being applied to the superconducting phase-change edge detector to detect the to-be-detected sample, and guarantees the high-energy resolution of the superconducting phase-change edge detector.

The invention discloses a scintillator light output measurement method based on time discrimination. The method comprises the following steps: converting scintillation light generated by a scintillator sample to be measured under excitation of a radioactive source into an electric signal; after the electric signal is amplified by an amplifier, discriminating, collecting and storing rise time and pulse height of a digital waveform, or obtaining a long gate integral value Qlong and a short gate integral value Qshort, and obtaining a pulse discriminating value PSD according to the long gate integral value Qlong and the short gate integral value Qshort; generating a two-dimensional distribution histogram of the low-light output scintillator by taking the Qlong value as an abscissa and the PSD value as an ordinate; performing corresponding processing on the obtained two-dimensional distribution histogram, and performing projection in the X-axis direction to obtain a scintillator energy spectrogram; gaussian fitting is carried out on a full-energy peak in the energy spectrum diagram to obtain a central value and a half-peak width, and then light output and energy resolution of the scintillator are obtained through calculation. According to the invention, scintillator signals with low light output can be accurately detected and calibrated, the data acquisition speed is fast, and the output result precision is high.

The invention discloses a neutron measurement device of a helium-4 proportional counter tube, which comprises a helium-4 proportional counter tube and a proportional counter tube taking helium-4 as a main gas, the internal air pressure of which is greater than or equal to 1Mpa, and the neutron measurement device is used as a neutron detector and is used for generating ionized particles; the neutron moderation collimation body wraps the helium-4 proportional counter tube and is used for scattering and moderating neutrons generated by the nuclear fusion device outside the sight of the neutron moderation collimation body so as to realize a collimation effect; the amplifier is used for amplifying an output signal of the helium-4 proportional counter tube; the pulse height analyzer is used for receiving the amplified output signal and outputting a pulse height spectrum; and the calculation module is used for receiving the pulse height spectrum, fitting the pulse height spectrum based on a predetermined deuterium-deuterium neutron response energy spectrum and a predetermined deuterium-tritium neutron response energy spectrum, obtaining the ratio of the share of deuterium-deuterium neutrons to the share of deuterium-tritium neutrons in the output of the pulse height analyzer, and calculating the ratio of the deuterium-deuterium neutrons to the deuterium-tritium neutrons. The device does not depend on a photomultiplier, and is not liable to be interfered.