HT-7超导托卡马克装置上中子通量分布的实验研究

Experimental study of neutron flux distribution on HT-7 superconducting tokamak

本文介绍了HT-7超导托卡马克装置上中子通量分布的测量实验。在实验中,使用了两种有较强抗伽马能力的中子探测系统:BF3和3He正比计数管及其相应的电子学与数据采集。在2005年春季实验中,在相同实验条件下,细致测量并比较研究了真空室外不同水平位置、垂直位置的中子通量。实验研究了真空室窗口和变压器铁芯的存在对测量结果的影响,验证了测量结果与三维数值计算的一致性。本项工作为更深入的物理研究奠定了基础。

Measurements of the neutron flux distribution have been performed and presented in this paper. Two kinds of neutron detector system based on high gamma-resistant BF3 and ^3He proportional counters, associated electronics and data acquisition system were used in the experiments. In HT-7 2005 spring campaign, the neutron fluxes of different horizontal and vertical positions outside the vacuum vessel were measured and analyzed in detail under the same discharge conditions. The influences of the existence of the vacuum vessel and the iron-core transformer were studied. The consistency between the measurement and the three-dimensional numerical calculations has been proved.