Abstract:

The EAST transient electric field measurement system is designed for detecting the distribution and intensity of the transient electric field while the EAST is discharging, and can provide the basis for electromagnetic compatibility (EMC) design. It is composed of monopole electric-field probe, photoelectric isolation device, NI data acquisition equipment and software developed on LabVIEW to deal with the data. By testing, it can make synchronous data acquisition with sixteen analog channels, 20MHz sampling rate and up to 650MB⋅s^-1 throughput separately, which is able to meet the demand of acquiring, processing and storing the real-time data in the high-frequency analog signals multi-channel mode.

Key words: EAST, Electromagnetic compatibility, Electric-field probe, data acquisition, LabVIEW

摘要：

EAST 瞬态电场测量系统检测放电时 EAST 装置周围的瞬态电场分布及强度，为电磁兼容(EMC)设 计提供依据。该系统由单极子电场探头、光电隔离设备、NI 数据采集设备构成硬件平台，利用 LabVIEW 进行软 件编程，对采集的数据进行处理。经过测试，该系统可实现 16 个模拟通道、20MHz 采样率同步数据采集，高达 650MB⋅s⁻¹ 的数据吞吐量，满足了高频模拟信号的多通道实时数据采集，处理和存储要求。

关键词: EAST , 电磁兼容, 电场探头, 数据采集, LabVIEW