Magnetic Field Measurements from Solar-B Information shown here is from Solar-B team (including Drs...
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Transcript of Magnetic Field Measurements from Solar-B Information shown here is from Solar-B team (including Drs...
Magnetic Field Magnetic Field Measurements from Measurements from
Solar-BSolar-BInformation shown here is from Information shown here is from
Solar-B team (including Drs Solar-B team (including Drs Ichimoto, Kosugi, Shibata, Ichimoto, Kosugi, Shibata,
Tarbell, and Tsuneta)Tarbell, and Tsuneta)
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-7Orbit: Sun synchronous altitude ~ 600 kmWeight: ~ 900 kg
SOLAR-BISAS / NASA / PPARC / ESA
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
EIS (360”x512”)
XRT(2048”x2048”)
E W
S
SOT:NFI/SP(328”x164”)
SOT: BFI(205”x102”)
NSolar-B Fields of ViewSolar-B Fields of View
SOHO/EIT FeXII 195A
Sensitivity of NFI on polarization and detection limit of the weak magnetic field
WavelenWavelengthgth
(nm)(nm)
ggeffeff Pol. SensitivityPol. Sensitivity(diagonal (diagonal
element of x)element of x)
Detection limit Detection limit of of BB
(( = 0.001, = 0.001, Gauss)Gauss)
remarkremark
VV QUQU BBll BBtt
MgI MgI 517.2517.2
1.751.75 0.5770.577 0.4520.452 8686 656656 Chrom. BChrom. B
FeI FeI 525.0525.0
3.003.00 0.2660.266 0.6090.609 1818 106106 Photos. BPhotos. B
FeI FeI 557.6557.6
0.000.00 -- -- -- -- Photos.Dopp.Photos.Dopp.
NaI NaI 589.6589.6
1.331.33 0.6330.633 0.2970.297 4040 (670)(670) Chrom. Chrom. BBll
FeI FeI 630.2630.2
2.502.50 0.5260.526 0.5030.503 1212 122122 Photos. BPhotos. B
HI 656.3HI 656.3 1.331.33 0.4020.402 0.0730.073 119119 >2000>2000 Chrom. Chrom. Str/Dopp.Str/Dopp.
SOT is now a well calibrated polarization instrument! See poster by Ichimoto etal.