Development of precision Wolter mirrors for solar x-ray observations

Taro Sakao, Satoshi Matsuyama, Takumi Goto, Jumpei Yamada, Shuhei Yasuda, Kazuto Yamauchi, Yoshiki Kohmura, Ayumi Kime, Akira Miyake, Tadakazu Maezawa, Hirokazu Hashizume, Yoshinori Suematsu, Noriyuki Narukage, and Shin-nosuke Ishikawa "Development of precision Wolter mirrors for solar x-ray observations", Proc. SPIE 10386, Advances in X-Ray/EUV Optics and Components XII, 103860E (23 August 2017); https://doi.org/10.1117/12.2273507

Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP)

Chromosphere, the transition layer of the sun is a region to switch to the magnetic pressure dominated from plasma pressure dominated, simultaneous observation of the detailed magnetic field measurement and plasma of dynamic phenomenon here is what is the frontier of the next solar physics. As This is a challenge that has just mentioned, even the next solar observation satellite plan SOLAR-C, in the experiments we had used a NASA sounding rocket for the first time in the SOLAR-C plan, will address the chromosphere-transition layer magnetic field measurement there. It is, is a Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) plan, the linear polarization of Lyman emission lines chromosphere-transition layer shoots (121.6nm) were detected in 0.1 percent of high accuracy, a new technique called Hanre effect I get the magnetic field information of chromosphere-transition layer. In Japan, the US and Europe joint observation in November 2012 as a rocket experiment is adopted to NASA this plan that full-scale start-up, start from assembly work is 2014 spring flight observation device, currently, it is where the alignment of the optical elements have been implemented. After this, it is planned to continue with the performance evaluation towards the observation implementation of summer 2015. In addition to once again explain the contents of the plan In this presentation, we report an overview of the entire development and preparation current status

CLASP2: High-Precision Spectro-Polarimetery in Mg II h & k

The international team is promoting the CLASP2 (Chromospheric LAyer Spectro-Polarimeter 2) sounding rocket experiment, which is the re-flight of CLASP (2015). In this second flight, we will refit the existing CLASP instrument to measure all Stokes parameters in Mg II h k lines, and aim at inferring the magnetic field information in the upper chromosphere combining the Hanle and Zeeman effects. CLASP2 project was approved by NASA in December 2016, and is now scheduled to fly in 2019

Expressions of iron uptake genes in roots are affected by long-distance signals both in non-graminaceous and in graminaceous plants.

Iron, one of the essential elements in plants, exists in soil in almost unavailable form for uptake from roots. Non-graminaceous plants (strategy I) and graminaceous plants (strategy II) have different mechanisms for iron uptake in the roots, though the structure and the function of some of the proteins related to iron uptake, such as IRT, FRO, bHLH, which are conserved between strategy I and II plants. Cis-acting elements of iron uptake genes are also conserved among them. In Arabidopsis, tobacco, tomato and pea, the induction of iron uptake in roots is thought to be regulated by unknown systemic long-distance signals. However, it is not clear whether the expressions of iron uptake genes are influenced by long-distance signals or not in strategy II plants. In this study, we carried out the leaf-excision experiment to find a clue of the long-distance signals in strategy II plants. The expression of GUS transgene driven by HvIDS2 promoter of barley disappeared by the leaf-excision in tobacco roots, suggesting there are transcription factors and other functional components for activation of the long-distance signaling cascade of strategy I plants in tobacco plants. Furthermore we compared the expression of OsNAS1 and OsIRO2 in rice plants with that of iron uptake genes in non graminaceous plants after the leaf-excision. The expression pattern of OsNAS1 and OsIRO2 was similar to that of AtFRO2 and AtbHLH38, respectively. These results likely indicate the long-distance signals are involved in iron uptake in strategy II plants as well as strategy I plants