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2009.4.4 ~ 4.11 米国訪問記 ・ボルダーにてSolar-C 彩層診断に関する サブワーキンググループ会議 ・ビッグベア太陽観測所訪問 Solar-C sub working group for chromosphere and corona observations (SWGCC) Kickoff meeting, 4/5 - 6 in HAO, Boulder Task of SWGCC: Evaluate the following items for the Solar-C, and provide the mission proposal for JAXA by next spring. 1. Specific science goals by chromospheric field measurements 2. Spectral diagnostics necessary to address the above issues 3. Requirements for the instruments specific to SOLAR-C plan-B ※ Telescope D = 0.5 ~ 1.5m Solar-C sub working group for chromosphere and corona observation Attendee and program Y. Katsukawa (NAOJ) chair (B. Lites, HAO) 怪我 Science goals of chromospheric field measurements (T. Wiegleman ) Non-Linear Force Free extrap. of coronal mag. field M. Carlsson (U. Oslo) MHD simulation and comparison with CRISP obs. T. Okamoto (NAOJ) Prominence science Y. Suematsu (NAOJ) Chrom. reconnection Diagnostic methods for chromospheric mag.: D. Orozco Suarez (NAOJ) ME inversion for chrom. line H. Socas Navarro (IAC) CaII IR triplet inversion, J. Trujillo Bueno (IAC) Hanle+Zeeman diagnostics, CaII IR vs. He10830 H. Uitenbroek (NSO) Response / contribution function of chrom. lines R. Casini (HAO) Hα Stalk effect and electric fields measurement (S. Nagata, Kyoto U.) MgII h&k observation K. Ichimoto (Kyoto U.) Summary of chrom. lines Instruments: H. Lin (U. Hawaii) Focal instruments for ATST, multi-slit sp, fiber image slicer Chromospheric lines (D=1m) Line A l/D [arcsec] geff Bl (10-4) [G] *1) √ phto/s /0.1”2 *2) Ratio [G] *3) blend Scat. pol. notes 0.22 1.25 335 9080 370 0.35 weak 44 32 40 5280 5500 6810 83 58 59 × △ 0.0 0.02 0.32 HeI 10830 CaII 8662 8542 8498 0.18 0.83 1.10 1.07 6563 0.14 1.00 140 5670 250 NaI D 5896 5890 0.12 1.33 1.17 10 12 4380 3820 23 32 △ 0.0 0.5 Low form.height 38 14 14 5410 4120 4670 70 34 31 × 0.01 0.25 1.00 Low form.height Ha MgI Large Dop. w 5183 5172 5167 0.11 1.25 1.75 2.00 4861 0.10 1.00 97 7210 130 △ CaII H 3968 K 3933 0.082 1.33 1.17 97 130 2260 2260 430 570 △ 0.0 0.5 MgII h 2803 k 2796 0.058 1.33 1.17 “ “ “ “ 0.0 0.5 Hb Lya 1216 1.00 Large Dop. w *1) LOS field strength to create V/I = 10-4 *2) Sqrt [ # of photon /sec/0.1” pix /(100mA*l/6000) ] with 1m telescope, throughput=0.1 *3) 1)÷2) = detectable LOS field strength in1 sec integration chrom_line2.pro w/ SacPeak atlas HeI 10830 10829.08 10830.25 10830.34 CaII 8498 IR triplet 8542 8662 Ha Hb NaI D1/D2 5890 (D2) Z=11 Ground level config. 1s22s2 2p6 3s1 (2S1/2) 5895 (D1) MgI triplet 5167 5172 5183 CaII H&K K CaII K H CaII H MgII h&k (a) Mg II h 線 k 線 k h Big Bear Solar Observatory 4/7~9 Members Valentyna Abramenko, Vladimir Abramenko, Kwangsu Ahn, Aleksandra Andic, Wenda Cao, Aaron Coulter, Roy Coulter, Randy Fear, Phil Goode, Nicolas Gorceix, Jeff Nenow, Erika Norro, Alla Shumko, Sergiy Shumko, John Varsik, Vasyl Yurchyshyn, Research Professor Electronics Engineer Researcher Research Professor Assistant Professor Mechanical Engineer NST Project Director Senior Solar Observer Professor, Director Optical Engineer Mechanical Engineer/Solar Observer Administrative Assistant Solar Observer Researcher, Assistant System Administrator Research Professor, System Administrator Research Professor Hα full disk Obs.、 2008~ D=10cm, 1/4A Zeiss Lyot, 2k x 2k、Kodak intreline, 7frame/sec. 10bit. 1/20 real time frame selection 5 wave /120sec Control through network NST (New Solar Telescope) under construction NST (New Solar Telescope) Roy Coulter, NST Project Director に説明受ける 主鏡: Zerodure 10cm 厚メニスカス、裏と横からてこ(36点)で保持。 軸外し放物 f3.8m, F/2.4、製作 Steward Observatory Mirror Lab 将来はアクチュエータで各点の力を制御。 表面に気流、裏面冷却系はまだ。 排熱鏡:四や120”、反射光はドーム内壁に。 副鏡:楕円、83.2m effective focal length (f/52 at Gregorian focus) 構造:シリンダーでのデクリの動かし方がユニーク。 東西のスライド式ウェイトで重心を常に極軸の鉛直上に持ってくる。 副鏡を支える構造は軽量アルミ。位置精度が確保できるかわからない。調整機構? ドーム:ドームには開口と同じ大きさの穴。 側面には風通しの窓が多数。 羽の角度で各開口を調整できるが、どう使うかはまだ不明。 現状:観測室までまだ光は行ってない。 望遠鏡側面(ナスミス)でCTを設置中。(韓国人) メイン構造物以外はすべてをここで手作りでやっている。 望遠鏡周りは3人のシニアなアメリカおじさん。計算機、制御ソフトもおじいさん。 First light 画像: 4/2-3 あたりに撮ったもの。 705nm, 5ms x 100image でspeckle reconstruction、 開口90cm 相当の回折限界像を得ている。 100枚の生画像はありきたりに見えるが、求めた画像はLaPalma 1m に 予定:AO SacPeak システムをコピー、 Polarimeter は設計中 Fast Imaging Spectrometer (FISS, Korean contribution ) Specifications of FISS Item Lines of interest Spectral resolving power (λ/Δλ) Field of view Best cadence Incident F ratio Slit width CCD pixels / size Specification Ca II (H, K, 8542), Hα, He I 10830Å and so on 1.4 × 105 40'' × 60'' 10 seconds 26 16μm 512 × 512 / 16μm × 16μm