Chromospheric LAyer SpectroPolarimeter (CLASP2)

N. Narukage et al. ; 12 pags., 5 figs., 3 tabs.The sounding rocket Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) was launched on September 3rd, 2015, and successfully detected (with a polarization accuracy of 0.1 %) the linear polarization signals (Stokes Q and U) that scattering processes were predicted to produce in the hydrogen Lyman-alpha line (Ly¿; 121.567 nm). Via the Hanle effect, this unique data set may provide novel information about the magnetic structure and energetics in the upper solar chromosphere. The CLASP instrument was safely recovered without any damage and we have recently proposed to dedicate its second flight to observe the four Stokes profiles in the spectral region of the Mg II h and k lines around 280 nm; in these lines the polarization signals result from scattering processes and the Hanle and Zeeman effects. Here we describe the modifications needed to develop this new instrument called the >Chromospheric LAyer SpectroPolarimeter> (CLASP2). © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.We acknowledge M. Hasumoto and K. Tanaka at the, Institute for Molecular Science S. Kimura at Osaka University, and K. Fukui at Fukui University for their support of our experiment at Ultraviolet Synchrotron Orbital Radiation Facility (UVSOR). Japanese participation for CLASP1 and CLASP2 is funded by the basic research program of ISAS/JAXA, internal research funding of NAOJ, and JSPS KAK- ENHI Grant Numbers 23340052, 24740134, 24340040, 25220703, and 16H03963. US participation for CLASP1 is funded by NASA Low Cost Access to Space (Award Number 12-SHP 12/2-0283). Spanish participation for CLASP1 is funded by the Ministry of Economy and Competitiveness through project AYA2010-18029 (Solar Magnetism and Astrophysical Spectropolarimetry). French hardware participation for CLASP1 was funded by Centre National d'Etudes Spatiales (CNES).Peer Reviewe