Experimental Study of Diagnosis Neutral Beam for HT-7 Tokamak

Xie, Yahong; Hu, Chundong; Liu, Sheng; Liu, Zhimin

doi:10.1088/1009-0630/10/6/07

Cited by 1 publication

(2 citation statements)

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“…This can be accomplished by combining the counting mode and Campbell measuring mode, saving the number of detectors and satisfying the design requirements of having a wide range and high integration. The main digital electronics in this system design effectively achieve the Campbell measuring method based on population variance described in equation (6), and is compatible with the upper control system. The main electronics acquire the neutron flux by sampling, processing, and analyzing algorithm; thus, the main electronics and their supporting handling algorithms are key to the design.…”

Section: System Implementationmentioning

confidence: 99%

“…Neutron flux measurement has constantly increased its demand on uniform management, centralized control, and data processing capabilities. Therefore, the developmental trend of measuring systems is to achieve a higher degree of integration and digitalization [6,7]. Neutron flux measuring systems used in traditional nuclear power stations are no longer suitable for tokamak devices because of their large size and low digitalization.…”

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confidence: 99%

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A digital wide range neutron flux measuring system for HL-2A

Yuan

Yin

2017

Plasma Sci. Technol.

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To achieve wide-range, high-integration, and real-time performance on the neutron flux measurement on the HL-2A tokamak, a digital neutron flux measuring (DNFM) system based on the peripheral component interconnection (PCI) eXtension for Instrumentation express (PXIe) bus was designed. This system comprises a charge-sensitive preamplifier and a field programmable gate array (FPGA)based main electronics plug-in. The DNFM totally covers source-range and intermediate-range neutron flux measurements, and increases system integration by a large margin through joining the pulse-counting mode and Campbell mode. Meanwhile, the neutron flux estimation method based on pulse piling proportions is able to choose and switch measuring modes in accordance with current flux, and this ensures the accuracy of measurements when the neutron flux changes suddenly. It has been demonstrated by simulated signals that the DNFM enhances the full-scale measuring range up to 1.9×10 8 cm −2 s −1 , with relative error below 6.1%. The DNFM has been verified to provide a high temporal sensitivity at 10 ms time intervals on a single fission chamber on HL-2A.

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Section: System Implementationmentioning

confidence: 99%

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confidence: 99%