Measurement of Solar Plasma Electric Fields

太阳等离子体电场的测量

• 批准号: 9301832
• 负责人: Peter Foukal
• 金额: --
• 依托单位: Cambridge Research & Instrumentation Inc
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-01 至 1997-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9301832&HistoricalAwards=false
• 关键词: Measurement; Solar; Plasma; Electric; Fields

Direct measurement of solar plasma electric fields has received relatively little attention considering the central importance of such fields in energy release, and in plasma and energetic particle acceleration in the solar atmosphere. This project's aim is to carry out ground-based measurements of such fields to validate the promising "electrograph" technique of electric field remote sensing based on measurement of the transverse Stark effect in solar hydrogen lines. Present work so far has centered on development and operation of a Mk I electrography at the NSO Evans Facility at Sacramento Peak, using the high Balmer and Paschen series lines. We are presently upgrading the SPO instrument to increase its sensitivity to 1 volt cm-1. This project will carry out two specific observational tests of this sensitivity, and to operate it on a daily basis to with flares, eruptive filaments, sunspots and faculae. The project will also requests support to extend this technique farther into the infrared, to include promising hydrogen lines out to beyond 10 . Some of this IR work is getting underway in late 1992, using the newly installed IR grating in the main McMath spectrograph at Kitt Peak, and the new NSO IR array. The results of these investigations will be compared to the discharge and reconnection models of flares, to models of post-flare loops, filament eruptions, and also to recent ideas on solar abundance variations. #

太阳等离子体电场的直接测量得到了相对较少的关注，考虑到这些领域的核心重要性，在能量释放，等离子体和高能粒子加速在太阳大气中。该项目的目的是对这种电场进行地面测量，以验证基于测量太阳氢谱线中的横向斯塔克效应的有前途的电场遥感“电描记”技术。到目前为止，目前的工作集中在萨克拉门托峰的NSO埃文斯设施的Mk I电图的开发和操作上，使用高的Balmer和Paschen系列线路。我们目前正在升级SPO仪器，以将其灵敏度提高到1伏cm-1。该项目将进行两次这种灵敏度的具体观测试验，并每天对耀斑、爆发性暗条、太阳黑子和光斑进行观测。该项目还将要求支持将这项技术进一步扩展到红外线，包括有前途的氢线超过10。1992年底，利用基特峰麦克马斯摄谱仪上新安装的红外光栅和新的国家空间观测站红外阵列，进行了部分红外工作。这些调查的结果将进行比较，放电和重联模型的耀斑，模型的耀斑后循环，灯丝爆发，也对太阳丰度变化的最新想法。#