Processing method and device for multi-channel energy spectrum measurement

Abstract

The invention belongs to the field of plasma diagnosis computer processing, in particular to a processing method and device for multi-channel energy spectrum measurement. The processing method includes the following steps: collecting a pulse signal sent by a probe and converting it into a digital pulse signal; counting and classifying the digitized pulse signal to obtain a count spectrum; converting the count spectrum into an energy spectrum; The energy attenuation produced by the beryllium foil is reduced, and the energy spectrum obtained in the third step is restored; the energy spectrum after reduction is smoothed and peaked and fitted to obtain the electron temperature. The processing device includes a pulse signal generation module, a high-speed acquisition card, an analog / digital signal conversion module, a high-speed cache module, and a processor unit with an energy counting module and a temperature calculation module. The problems of common multi-channel energy spectrum measurement and processing methods, such as high hardware cost, strong equipment specificity, limited number of energy channels, low spatial and temporal resolution, and inability to save original signals, are solved.

Description

technical field

[0001] The invention belongs to the field of plasma diagnosis computer processing, and in particular relates to a processing method and device for multi-channel energy spectrum measurement. Background technique

[0002] In Tokamak devices and other magnetic confinement nuclear fusion devices, the pulse height analysis system is usually used to measure the energy spectrum of soft X-ray radiation, so as to obtain some important plasma information, such as electron temperature, electron velocity distribution, and heavy metal impurity content and other information. At present, in the energy spectrum measurement of nuclear electronics, hardware methods such as analog-to-digital converters (ADC) are traditionally used for pulse height analysis, such as linear discharge ADC (Wilkinson type), but due to the limitation of conversion time, they cannot be used for High count rate energy spectrum measurement, and there are large noise, low count rate, serious accumulati...

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