1. Spicule observed in He 10830 Å Solar seminar in 2009 April 20 Short : Tetsu Anan HAZEL Bueno et al. 2005 Nuño et al. 2007 1, 2, 3,

2. HE10830 upper chromospheric spectral line Multiplet line (triplet) EUV coronal irradiation (λ (lower) level to be populated collisional excitation & ionization λ[ Å ] loweruppergRelative strength 10829.092.000.111 10830.251.750.333 10830.341.250.556 BLUE COMPONENT RED COMPONENT Nuño et al. 2007

3. HE10830 Si 1082.71 He 1082.91 He 1083.03 H 2 O 1083.21 Ca 1083.34 H 2 O 1083.21 Na 1083.49 H 2 O 1083.80 Sunspot observed at DST in Hida observtory

4. Hanle effect Weak B rotated and modify the direction of unmagnetized linear scattering polarization (population imbalances) Bueno et al. 2005 Zeeman splitting => good!! in He 10830 * circular polarization for line-of-sight B ∝ B * linear polarization for perpendicular line-of-sight ∝ B^2 negligible for perpendicular line-of-sight B < 100G Diagnostic for investigating the magnetism in He 10830 : diagnostic tool (Hanle, Zeeman, Paschen-Back ) I studied at Hanle effect workshop in this spiring from Mr. Katsukawa (Tujillo Bueno, Asensio Ramos,,,) HAZEL B in Gauss λ in Å

5. Model & coordinate Slab model Constant property slab Background light is unpolarized anisotropic continuum radiation =>population balance, source function, absorption coefficient neglect collision optical thickness is τ HAZE L τ height local coordinate for B B ： magnetic field strength θ B ： incrination χ B : azimuth

6. parameter HAZE L Height

7. Inversion HAZE L

8. problem Linear polarization of the 10830 Å is sensitive (via the upper level Hanle effect) to B = 0.1 〜 10G t life =life time (in seconds) of the given atomic level g=Lande factor B >10G We can get only θ B,χ B from linear polarization B ⊥ from circular polarization (Zeeman effect) => B Constant property Van-Vleck ambiguity => There are an angle having no atomic polarization 180°ambiguity HAZE L

9. θ=90° χ=0° γ=90° +Q Local cordinate Off-limb observation

10. Van-Vleck angle 90°scattering B const.

11. Offlimb_00 inclination azimuth For example of ambiguity from Mr Katukawa’s presentation file Χ square distribution map Red point is answer B constant Θ [5°]

12. Offlimb_01 inclination azimuth For example of ambiguity from Mr Katukawa’s presentation file Χ square distribution map Red point is answer B constant Θ [5°]

13. Offlimb_04 inclination azimuth For example of ambiguity from Mr Katukawa’s presentation file Χ square distribution map Red point is answer B constant Θ [5°]

14. Offlimb_02 inclination azimuth For example of ambiguity from Mr Katukawa’s presentation file Χ square distribution map Red point is answer B constant Θ [5°]

15. Offlimb_06 inclination azimuth For example of ambiguity from Mr Katukawa’s presentation file Χ square distribution map Red point is answer B constant Θ [5°]

16. Spicule is Chromospheric small jets Velocity ~ 25 km/sec (≈ sound velocity ≈ Alfven velocity ≈10km/sec) Height ≈ 6000~10000km Width ≈ 800 km Bueno et al. 2005

17. Observation Bueno et al. 2005 2001 May 10 50 consecutive images(expo.=100ms) Nuño et al. 2007 2005 December 4 10 consecutive images(expo.=250ms) 11m Å /px Tenerife Infrared Polarimeter mounted on the German Vacum Tower Telescope at the Observatorio del Teide

18. B of off-limb spicule Height 2000km U signal => Hanle effect ∵ scatter polarization => Q B ≈10G θ B ≈ 37° χ B ≈ 173° thermal velocity 13.5 km/s artificially enhancing the damping parameter Optically thick model Bueno et al. 2005 Open circle ： observed stokes profile Solid line ： theoretical modeling red circle ： caused by the presence of a significant amount of atomic polarization in the ground level

19. That all