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首页> 外文会议>Second Solar Cycle and Space Weather Euroconference Sep 24-29, 2001 Vico Equense, Italy >IMPACT POLARIZATION AS A DIAGNOSTIC FOR NON-THERMAL PARTICLES IN SOLAR FLARES
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IMPACT POLARIZATION AS A DIAGNOSTIC FOR NON-THERMAL PARTICLES IN SOLAR FLARES

机译：冲击极化是太阳耀斑中非热粒子的一种诊断方法

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摘要

Observations of linear polarization of lines (mainly Hα) during solar flares have been reported. The orientation (predominantly radial) and magnitude of the Hαpolarization (about 5 %) suggest an interpretation as impact polarization by low energy (< 200 keV) non-thermal protons, which are not accessible by more direct diagnostic observations, such as hard X-rays (for non-thermal electrons) or gamma-ray lines (for high energy protons, above a few MeV) which will be observed by the HESSI spacecraft, soon to be launched by NASA. Impact polarization observations could thus provide useful complementary data for the study of acceler-ated particles in flares. However, observations in a single line such as Hαcan give at best an order of magnitude estimate of the accelerated protons number flux, so multiline polarimetric observations, as can be done by the franco-italian THEMIS telescope, are highly desirable.
机译：已经报道了太阳耀斑期间线（主要是Hα）的线性极化现象。 Hα极化的方向（主要是径向）和幅度（大约5％）建议将其解释为低能（<200 keV）非热质子的撞击极化，这是更直接的诊断观察结果无法获得的，例如硬X-射线HESSI航天器将观测到的射线（用于非热电子）或伽马射线线（用于在几MeV以上的高能质子），不久将由NASA发射。因此，碰撞极化观测可以为研究火炬中加速粒子提供有用的补充数据。但是，像Hα这样的单线观测最多只能给出加速质子数通量的一个数量级估计，因此非常需要多线极化观测，如法国-意大利THEMIS望远镜可以完成的观测。

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