CLASP火箭实验用Ly-alpha偏振仪设计
Ly-alpha polarimeter design for CLASP rocket experiment
摘要：
一个名为Chromospheric Lyman-Alpha Spectro-Polarimeter（CLASP）的探测火箭计划将于2014年夏季发射。CLASP将观测Ly-alpha（121.567 nm）的太阳色球层，旨在首次探测散射过程和汉勒效应产生的线性偏振信号。CLASP的偏振计由旋转半波片、分束器和偏振分析器组成。氟化镁（MgF 2）用于这些光学部件，因为MgF 2在紫外波长下表现出双折射性质和高透明度。
英文摘要：
A sounding-rocket program called the Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is proposed to be launched in the summer of 2014. CLASP will observe the solar chromosphere in Ly-alpha (121.567 nm), aiming to detect the linear polarization signal produced by scattering processes and the Hanle effect for the first time. The polarimeter of CLASP consists of a rotating half-waveplate, a beam splitter, and a polarization analyzer. Magnesium Fluoride (MgF2) is used for these optical components, because MgF2 exhibits birefringent property and high transparency at ultraviolet wavelength.
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