極端紫外分光による 木星内部磁気圏の観測
DESCRIPTION
極端紫外分光による 木星内部磁気圏の観測. 2009 年 07 月 08 日 ISAS STP seminar 東大 / 吉川研 / 吉岡和夫. Contents. Introduction 極端紫外光( EUV )を用いた観測 EUV スペクトルを用いた温度・密度パラメタの導出 木星内部磁気圏 - 研究の動機 - 極端紫外分光器の開発 EXCEED 主鏡 回折格子 検出器 MCP with photocathode RAE 防護壁 Model spectrums 解析手法 EUV スペクトルを用いた電子温度、密度の導出 今後の課題 - PowerPoint PPT PresentationTRANSCRIPT
-
20090708ISAS STP seminar//
-
Chap. 0 : CONTENTS*ContentsIntroductionEUVEUV--
EXCEEDMCP with photocathodeRAEModel spectrums
EUV
CASSINI*
-
*ContentsIntroductionEUVEUV--
EXCEEDMCP with photocathodeRAEModel spectrums
EUV
CASSINIChap. 0 : CONTENTS
Chap. 0 : CONTENTS
-
MCPRAEEUV2EUVMCP107RAE
SELENE/UPI/TEX3MCP ~0.1 pC7 bits128128 pixelsRAE : 1~100 k Ohm*MCP + RAE (PHEBUS/BBM)MCP + RAEChap.2 :
Chap.2 :
-
MCPRAEEUV~10bits~RAE (Resistive Anode Encoder)+RuO2121(x,y)*LLChap.2 :
Chap.2 :
-
2RAE MCP~~*Chap.2 :
Chap.2 :
-
Chap.2 : *RAE10 bits (1024 * 1024 pixels)SELENE/UPI/TEX7 bits
(Point)RAEMCP, 10 pF1110 bitsRAE1 *
-
Chap.2 : *RAE 11mm (minimum)
RuO2 [s]10pFAmptek/A2252.4 us10 k Ohm*
RAE500 k100 k 50 k 10 k 5 k 1 k 10 pF18.13.611.790.420.180.043 pF6.931.380.700.100.070.02
-
Chap.2 : *RAE 2 -100 OhmRAEA225FRAE10 k Ohm0.5 us200 300 OhmRAE1mm, 10 k Ohm()*
-
Chap. 0 : CONTENTS*ContentsIntroductionEUVEUV--
EXCEEDMCP with photocathodeRAEModel spectrums
EUV
CASSINI*
-
*EUVEUV (Extreme Ultraviolet)30 150 nm (8 40 eV)FUVHeII 30.4, NeI 73.4, SIII 68.0 nm, HI 121.6 nm, etc.
EUVVoyager 1, 1977, He, H, OEUVE, 1992, HeIPlanet-B, 1998, (HeII)Cassini, 2004, (HeII)SELENE/KAGUYA, 2007~, (HeII, OII)EUVChap. 1 : INTRODUCTION
Chap. 1 : INTRODUCTION
-
*EUVEUV 24Chap. 1 : INTRODUCTION
Chap. 1 : INTRODUCTION
-
*~~* ** 1 AU = 1.5E+8 km ~ 2000 RJ Chap. 1 : INTRODUCTION
71500 km6400 km9h55min24 h*420,000 nT31,000 nT [1 ton/s]5.1 AU**1 AU
Chap. 1 : INTRODUCTION
-
*10RJ5.9RJ58.2 km/s100 eV5 eV100 eVNeutrals(Pick up)Ions(S+, O+, etc.)Core electronsUV radiationTransportFast neutralHot electrons???Chap. 1 : INTRODUCTION
Chap. 1 : INTRODUCTION
-
*Voyager 1, 2GALILEOCASSINIIUE, HUT, HST
~eVCASSINI/UVISEUVSteffl et al., 2004
CASSINI1Voyager Sitteler and Strobel, 1987eV100 1000 eV1Voyager 1Chap. 1 : INTRODUCTION
Chap. 1 : INTRODUCTION
-
Chap. 0 : CONTENTS*ContentsIntroductionEUVEUV--
EXCEEDMCP with photocathodeRAEModel spectrums
EUV
CASSINI*
-
*EUVEXCEED-2012110.3 nm FWHM, 10 arcsec.
EXCEEDChap. 2 : EUV
MCPRAE0.3 nm FWHMRAE10 30 SN
Chap. 2 : EUV
-
*~~ 2(60 um)
20cm, 5.4, F8F/85.4
Pt, Sic, SiEXCEEDPt02% @30.4 nm22% @58.4 nm15% @83.4 nmSi---% @30.4 nm02% @58.4 nm15% @83.4 nmSiC00% @30.4 nm13% @58.4 nm30% @83.4 nm
-
*CVD-SiC3CVD-SiCCVD(SiO2, H2, CH4, etc.SiCSiC0.5 nmCVD-SiC
-
*CVD-SiC2CVD-SiC30 50%
-
*10 arcsec, 0.3 nm FWHM+160 145 nm
+1+1
CVD-SiC
-
*CVD-SiC+18, 15, 20, 22, 26, 39 nm+122 nm
-
Chap.2 : *MCP (Micro channel plate)MCP10um2*
-
CsICsI, KBr1330~84 nm105~135 nm201.5102*
30-84 nm105-135 nmCsI / Bare1.5 - 25 - 80
-
*EXCEEDCASSINI/UVIS Esposito et al., 1996EXCEEDEXCEEDCASSINI/UVIS3003
-
Chap. 0 : CONTENTS*ContentsIntroductionEUVEUV--
EXCEEDMCP with photocathodeRAEModel spectrums
EUV
CASSINI*
-
*EXCEEDEXCEEDCHIANTI6.3130 * 30EXCEED
-
*SII, SIII, OII, etc.Aij1 cm2-Nj
-
*EXCEED1SIII680ASIII700ASIII1191ASIII1191ATE= 0.5 eV, t = 1 h
-
*EXCEED1SIII680ASIII700ASIII1191ASIII1191ATC = 5 eVTH = 100 eVfH= 1 %, t = 1 h
-
*EXCEED~100RJ10~1001TE, TH, FH, etc.
-
RAEPhotocathode
EXCEEDS/N
Cassini
*
-
*
-
*
-
*
ORBIT []Pioneer 10P10197231973Flyby1.8 RJPioneer 11P11197341974Flyby0.5 RJVoyger 2V21977819797FlybyVoyger 1V11977919793FlybyEUV600 - 1700International Ultraviolet ExplorerIUE197811978 - 1996GSO ~30000 km)UV1150 - 1980 1800 - 3200Einstein spacecraftHEAO-21978121978 - 1981Earth500 kmX-ray2 - 50GalileoGLL1989101995 - 2000UVS, VISPWS, PLSHubble Space TelescopeHST199041990 -Earth ??? KmSTIS, UVROSATRST199061991, 1992Earth580 kmX-rayUlysesesULS1990101992FlybyHopkins Ultraviolet TelescopeHUT1199012199012Space shuttle ColumbiaEUV, FUV912 - 1850 415 - 912(2nd)&Astro-1EUVEEUVE199261992 - ?? Earth~350 kmHopkins Ultraviolet TelescopeHUT21995519955Space Shuttle EndeavourFUV820 - 1840Astro-2CASSINICAS1997102000-2001Flyby5RJEUV, FUV584 - 1120 1100 - 1750 ?EXCEED20132013-2014Earth1000 kmEUV584 - 1412
-
r [] R [/mm] a [mm]2aI [A/mm]AB*
-
*21C : C_MCP = R1 : R20
-
*1pF1pF1pFF.G.1 pFV, fV1V2
-
*
-
* CVD-SiC coated mirror and grating -0.3~0.5 nm10.4 degree.+14
-
*1979Voyager 1/UVS
HSTUV15RJClarke et al., 1998
Bhattacharya and Thorne 200115 RJ
-
*10RJ15 30 RJLoss cone2 erg/cm2/sec18.4RJ40 100 erg/cm2/sec~ 100 erg/cm2/sec15 ~ 29 keV18.4RJ
-
*Control of Jupiters radio emission and aurorae by the solar wind, D.A. Gurnett et al., 2002, Nature2000CASSINIGalileoCASSINI: RPWS, MAG, CAPS, UVISGALILEO: PWS
-
*CASSINI0.5 5.6 MHz
CASSINIGALILEO0.5 5.6 MHz19h55m32GALILEO1GALILEO
-
*1CASSINI/MAGCASSINI/CAPSGALILEO: PWS1CASSINI16721 km/sCASSINI/UVIS110.8 113.1
-
*2BGALILEO/PWSTrapped continuum radiation fp or 13GALILEO528 km/sLow-mach-numberInterplanetary shock
-
*
-
*Dungey cycleIMFGalileo150~200RJ (Joy et al., 2002)
1500RJ10%
1000Kivelson and Southwood 2005, JGR
-
*10McComas and Baganel., 2007IMFOPEN MAGNETIC FLUXIMFCLOSED FLUX10RJ2
-
* UVISParkinson et al., 2006 HeH58.4 nm
-
*
&19801990
CASSINIGALILEO2000EXCEED
-
*NCT
-
*~ 70 RJ
3< 10 RJ10 40 RJ> 40 RJ
Khurana et al., 2003
- *Plasma
-
*~5.9 RJ100 eV5 eVFast neutral: 400 RJ Mendillo et al., 1990
Energy crisisVayager1PWS
-
*Neutrals(Pick up)Ions(S+, O+, etc.)Core electronsUV radiationTransportFast neutralPick up Shemansky 1988, Delamere and Bagenal 2003 CHIANTI Shemansky et al., 1988, Delamere and Bagenal 2003
-
*S, S+, S++, S++, O, O+, ele.
-
*Energy source and lossElectron impact ionization: Voronov 1997 Recombination: Michael and shull 1982Charge exchange reactionSmith and Strobel 1985Te=5 eV, Ts=100 eV, Ns=500, Ne=2000 1 eV/s/cm^3
-
*Electron temperatureCoulomb collisionRadiationTransportCoulomb interactionNs=500 /cm^3, Ts=100 eV, Ne=2000, Te=5 eV 0.05 [eV/cm^3/sec]
-
*Coulomb collisionRadiationTransportRadiative rate coefficient
CHIANTI
Ns=500 /cm^3, Ne=1000, Te=5 eV 0.5 [eV/cm^3/sec]Electron temperature
-
*Neutral source rate O/S ratioHot electron fractionHot electron temperatureTransport time Voyager1, 2 and Cassini
Voyager 1neS+/neS++/neS+++/neO+/neO++/neTiVoyager 2neS+/neS++/neS+++/neO+/neO++/neCassinineS+/neS++/neS+++/neO+/neO++/nePUV
-
*S, S+, S++, S+++ , O, O+, O++
-
*Voyger1, Voyager2, Cassini
Voyager 1Voyager 2CassiniNeutral source (10-4 cm-3s-1)10307O/S ratio 4.04.01.7Hot electron fraction (%)0.230.120.3Hot electron temperature (eV)60060040Transport time (days)502350
-
*Neutrals(Pick up)Hot electronsUV radiationTransportFast neutralIons(S+, O+, etc.)Core electrons
Voyager 1Voyager 2CassiniEnergy flow (10-4 eV cm-3s-1)0.411.120.66S ionization 121614S charge exchange15138O ionization793O charge exchange485115Hot electron thermal coupling181160Fast neutrals20405Transport10186UV radiation704289
-
*EXCEED12
160 cm
-
*
Voyager1, Voyager2, Cassini
EXCEED
-
*Hot electron 60%UV90%
-
*
******a=r/R