Bibcode
Narukage, Noriyuki; Tsuneta, Saku; Bando, Takamasa; Kano, Ryouhei; Kubo, Masahito; Ishikawa, Ryoko; Hara, Hirohisa; Suematsu, Yoshinori; Katsukawa, Yukio; Watanabe, Hiroko; Ichimoto, Kiyoshi; Sakao, Taro; Shimizu, Toshifumi; Kobayashi, Ken; Robinson, Brian; Kim, Tony; Winebarger, Amy; West, Edward; Cirtain, Jonathan; de Pontieu, Bart; Casini, Roberto; Trujillo-Bueno, J.; Stepan, J.; Manso-Sainz, R.; Belluzzi, L.; Asensio-Ramos, A.; Carlsson, Mats
Referencia bibliográfica
Solar Physics and Space Weather Instrumentation IV. Edited by Fineschi, Silvano; Fennelly, Judy. Proceedings of the SPIE, Volume 8148, pp. 81480H-81480H-17 (2011).
Advertised on:
9
2011
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Descripción
The solar chromosphere is an important boundary, through which all of
the plasma, magnetic fields and energy in the corona and solar wind are
supplied. Since the Zeeman splitting is typically smaller than the
Doppler line broadening in the chromosphere and transition region, it is
not effective to explore weak magnetic fields. However, this is not the
case for the Hanle effect, when we have an instrument with high
polarization sensitivity (~ 0.1%). "Chromospheric Lyman- Alpha
SpectroPolarimeter (CLASP)" is the sounding rocket experiment to detect
linear polarization produced by the Hanle effect in Lyman-alpha line
(121.567 nm) and to make the first direct measurement of magnetic fields
in the upper chromosphere and lower transition region. To achieve the
high sensitivity of ~ 0.1% within a rocket flight (5 minutes) in
Lyman-alpha line, which is easily absorbed by materials, we design the
optical system mainly with reflections. The CLASP consists of a
classical Cassegrain telescope, a polarimeter and a spectrometer. The
polarimeter consists of a rotating 1/2-wave plate and two reflecting
polarization analyzers. One of the analyzer also works as a polarization
beam splitter to give us two orthogonal linear polarizations
simultaneously. The CLASP is planned to be launched in 2014 summer.