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A Sounding Rocket Experiment for the Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP)A sounding-rocket experiment called the Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is presently under development to measure the linear polarization profiles caused by scattering processes and the Hanle effect in the hydrogen Lyman-alpha line (121.567nm). Accurate measurements of the linear polarization signals caused by scattering processes and the Hanle effect are essential to explore the strength and structures of weak magnetic fields. The primary target of future solar telescopes is to measure the weak magnetic field in outer solar atmospheres (from the chromosphere to the corona through the transition region). The hydrogen Lyman-alpha-line is one of the best lines for the diagnostics of magnetic fields in the outer solar atmospheres. CLASP is to be launched in 2015, and will provide, for the first time, the observations required for magnetic field measurements in the upper chromosphere and transition region. CLASP is designed to have a polarimetric sensitivity of 0.1% and a spectral resolution of 0.01nm for the Lyman-alpha line. CLASP will measure two orthogonal polarizations simultaneously for about 5-minute flight. Now the integration of flight mirrors and structures is in progress. In addition to our strategy to realize such a high-precision spectro-polarimetry in the UV, we will present a progress report on our pre-launch evaluation of optical and polarimetric performances of CLASP.


Document ID
20150001406
Acquisition Source
Marshall Space Flight Center
Document Type
Abstract
Authors
Kubo, M.
(National Astronomical Observatory Tokyo, Japan)
Kano, R.
(National Astronomical Observatory Tokyo, Japan)
Kobayashi, K.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Ishikawa, R.
(National Astronomical Observatory Tokyo, Japan)
Bando, T.
(National Astronomical Observatory Tokyo, Japan)
Narukage, N.
(National Astronomical Observatory Tokyo, Japan)
Katsukawa, Y.
(National Astronomical Observatory Tokyo, Japan)
Ishikawa, S.
(National Astronomical Observatory Tokyo, Japan)
Suematsu, Y.
(National Astronomical Observatory Tokyo, Japan)
Hara, H.
(National Astronomical Observatory Tokyo, Japan)
Tsuneta, S.
(Japan Aerospace Exploration Agency Chofu, Japan)
Shimizu, T.
(Japan Aerospace Exploration Agency Chofu, Japan)
Sakao, T.
(Japan Aerospace Exploration Agency Chofu, Japan)
Ichimoto, K.
(Kyoto Univ. Kyoto, Japan)
Winebarger, A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Cirtain, J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
De Pontieu, B.
(Lockheed Martin Advanced Technology Center Palo Alto, CA, United States)
Casini, R.
(National Center for Atmospheric Research Boulder, CO, United States)
Auchere, F.
(Centre National de la Recherche Scientifique Annecy-le-Vieux, France)
Trujillo, Bueno J.
(Instituto de Astrofisica de Canarias Tenerife, Spain)
Manso, Sainz R.
(Instituto de Astrofisica de Canarias Tenerife, Spain)
Ramos, Asensio A.
(Instituto de Astrofisica de Canarias Tenerife, Spain)
Stepan, J.
(Academy of Sciences of the Czech Republic Prague, Czech Republic)
Belluzi, L.
(Istituto Ricerche Solari Locarno Locarno, Switzerland)
Carlsson, M.
(Oslo Univ. Norway)
Date Acquired
February 5, 2015
Publication Date
November 30, 2014
Subject Category
Solar Physics
Report/Patent Number
MSFC-E-DAA-TN19542
Meeting Information
Meeting: Polarimetry: The Sun to Stars and Stellar Environments, IAU Symposium 305
Location: Punta Leona
Country: Costa Rica
Start Date: November 30, 2014
End Date: December 5, 2014
Sponsors: Meadowlark Optics, Inc., National Center for Atmospheric Research, National Solar Observatory, Costa Rica Univ., International Astronomical Union
Funding Number(s)
WBS: WBS 791926.02.03.05.32
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
solar
UV polarimetry
chromopheric
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