日球成像仪太阳杂光抑制能力测试方法研究

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中图分类号：TB96;TH741.4 文献标志码：A

Abstract： In order to quantitatively assess the solar stray light suppression capability of the heliospheric imager， a testing approach and experimental validation were investigated. In this paper， we proposed a method to test the solar stray light suppression capability of the heliospheric imager under laboratory circumstances by conducting segmented tests of the front-end bafle and the camera.This approach circumvented the issue that the structural scattering caused by the test under vacuum conditions would be overly large and influence the accuracy of the test results. The proposed method was then employed to assess the effectiveness of a heliospheric imager in suppresing solar stray light under laboratory conditions. The experimental results indicate that the PSTof the front-end diaphragm of the heliosphere imageris 1.4×10-8 at WACHl and 4.3×10-9 at WACH2. The error analysis of the test results reveal that the random error is 21.6% ， and the PST resulting from the sum of system errors is 1.1×10-8 at WACHl and 4.2×10-9 at WACH2. The test accuracy meets the requirements，demonstrating the feasibility and accuracy of the test method.The study presented in this paper offers a novel means to test the solar stray light suppression capability of heliospheric imager.

Key words： heliospheric imager; stray light test; error analysis

1引言

日球成像仪是观测日地连线区域日冕物质抛射事件（CMEs）的仪器，观测CMEs的关键问题之一是如何抑制太阳杂光[1。（剩余10947字）