Development of the HL-2M digital pulse analysis system

Abstract

A digital pulse analysis system is an important diagnostic system in nuclear physics experimental research. In response to the demand for reflecting the particle state in a nuclear physics experiment, we have designed and developed a real-time digital pulse analysis system and applied it to the digital nuclear pulse waveform discrimination of different detectors in the HL-2M tokamak. The system is based on the peripheral component interconnect extensions for instrumentation (PXI) platform, while its software was written in LABVIEW. The key technologies involved in the system implementation include digital pulse analysis technology, digital discrimination technology, pulse height analysis technology, etc. The system has been applied to the plastic scintillator detector at the Neutron Source Lab of the University of Science and Technology of China. And the experimental results indicate that the system can discriminate between neutron (n) particles and gamma (γ) particles well when used to measure the plastic scintillator detector.

Enhanced antibacterial activity of cotton via silver nanocapsules deposited by atmospheric pressure plasma jet

“…The results of the UV absorption spectra of the nano-silver colloid are shown in figure 3(a). The transparent bright yellow nano-silver colloid has a peak around 415 nm, which is a typical surface plasma resonance (SPR) peak for AgNPs in the region of 400-450 nm, and the result indicates that the nano-powder has successfully dispersed and the colloid has finally formed [30,31]. Moreover, from the TEM image is illustrated in figure 3(b), it can be observed that the particle diameter is about 80 nm.…”

High-precision digital time-amplitude analysis system for the neutron Time-Of-Flight spectrometer in HL-2M

“…Amplitude analysis involves collecting particle pulses using high-speed Analog-to-Digital Converter (ADC) and analyzing the pulse amplitude to obtain multiple pieces of information, such as pulse shape and amplitude [13][14][15]. However, this method suffers from low timing accuracy and high costs for a large number of channels [16]. Time analysis, on the other hand, directly collects the time at which the pulse is detected, providing high timing accuracy, short dead time, fast processing speed, and support for numerous channels [17].…”