1. Magnetic Field Measurements from Solar-B Information shown here is from Solar-B team (including Drs Ichimoto, Kosugi, Shibata, Tarbell, and Tsuneta)

2. Science - Coronal heating - Coronal structure / dynamics - Elementary processes in Magnetic Reconnection Mission instruments - Optical Telescope / Vector Magnetograph (SOT) - X-ray Telescope (XRT) - EUV Imaging Spectrometer (EIS) Launch Date: Summer 2006 with ISAS M-V-7 Orbit: Sun synchronous altitude ~ 600 km Weight: ~ 900 kg SOLAR-B ISAS / NASA / PPARC / ESA

3. Key Elements with Solar-B Instruments Solar Optical Telescope (SOT) Largest optical telescope ever to observe the Sun from space Diffraction-limited (0.2 – 0.3 arcsec) imaging in 388 – 668 nm Vector magnetic field measurement at the photosphere X-Ray Telescope (XRT) Highest angular resolution imaging at > 3 MK corona Wide temperature coverage from below 1 MK to above 10 MK EUV Imaging Spectrometer (EIS) Precise plasma diagnostics in the 17 – 21 nm & 25 – 29 nm ranges Continuous observation without interruption for 8 months a year Coordinated observation among the three telescopes

5. EIS (360”x512”) XRT (2048”x2048”) E W S SOT:NFI/SP (328”x164”) SOT: BFI (205”x102”) N Solar-B Fields of View SOHO/EIT FeXII 195A

7. Sensitivity of NFI on polarization and detection limit of the weak magnetic field Wavelength (nm) (nm) g eff Pol. Sensitivity (diagonal element of x) Detection limit of B (  = 0.001, Gauss) remark VQU BlBlBlBl BtBtBtBt MgI 517.2 1.750.5770.45286656 Chrom. B FeI 525.0 3.000.2660.60918106 Photos. B FeI 557.6 0.00----Photos.Dopp. NaI 589.6 1.330.6330.29740(670) Chrom. B l FeI 630.2 2.500.5260.50312122 Photos. B HI 656.3 1.330.4020.073119>2000 Chrom. Str/Dopp. SOT is now a well calibrated polarization instrument!  See poster by Ichimoto etal.