宇宙航空研究開発機構特別資料

2009年 2 月

Japan Aerospace Exploration Agency 

JAXA Special Publication

ISSN 1349-113X JAXA-SP-08-013

宇宙航空研究開発機構特別資料

宇宙航空研究開発機構

大電力化/モジュール化電気推進に関する研究会

㩷 㩷

߹߃߇߈㩷

㩷 㩷 㩷

ޟߪ߿߱ߐޠዊᖺᤊតᩏᯏߪࡑࠗࠢࡠᵄ᡼㔚ᑼࠗࠝࡦࠛࡦࠫࡦࠍ㚟ࠅޔ৻〝

࿾⃿Ꮻㆶߩㅜߦ޽ࠅ߹ߔޕ ޟ߈ߊ㧤ภޠߪࠞ࠙ࡈࡑࡦᑼࠗࠝࡦࠛࡦࠫࡦߦߡ♖ኒ ߥ㕒ᱛ゠㆏⛽ᜬࠍᣣޘⴕߞߡ޿߹ߔޕߎߩࠃ߁ߦᣣᧄߩᛛⴚߣߒߡߩ㔚᳇ផㅴ ߇ᄙᓀߥቝቮࡒ࠶࡚ࠪࡦࠍౕ૕ൻߒ߹ߒߚޕ੹ᓟߪޔߐࠄߦ㜞ᕈ⢻ൻߒߚ㔚᳇

ផㅴࠍ↪޿ߡޔ⿥ૐ㜞ᐲⴡᤊ࡮ో㔚ൻ㕒ᱛⴡᤊ࡮ࡂࠗࡉ࡝࠶࠼㕒ᱛᛩ౉࡮゠㆏

㑆ャㅍ࡮⿥㆙〒㔌ᷓቝቮേജ⥶ⴕߥߤߩࡒ࠶࡚ࠪࡦ߇ߙߊߙߊߣታ⃻ߐࠇࠆ⷗

ㄟߺߢߔޕߎߩᛛⴚⷐ⚛ߪޔቝቮᄢ㊂‛⾗ャㅍࠍᜂ޿ޔ᦬᦭ੱࡒ࠶࡚ࠪࡦታᣉ

߿ቝቮᄥ㓁⊒㔚ᑪ⸳ࠍᡰ߃ޔ࿖㓙⽸₂߳ߩ㊀ⷐߥ㎛ߣߥࠆߎߣߢߒࠂ߁ޕ

ߎߩ࠻࡟ࡦ࠼ࠍ⷗ᝪ߃ߚ਄ߢޔ⃻࿷ߩᄢဳ㔚᳇ផㅴߩ࡜ࠗࡦ࠽࠶ࡊ߿⎇ⓥ㐿

⊒ਛߩᛛⴚࠍ✚ⷩߒޔ⋡ᮡࠍߤߎߦ⸳ቯߒߤߩᛛⴚࠍߤߩ࡞࡯࠻ࠍ੺ߒߡߤߩ ࠃ߁ߦ⊒ዷߐߖߡⴕߊ߆ޔࠍ⠨߃ࠆ⎇ⓥળޟᄢ㔚ജൻ㧛ࡕࠫࡘ࡯࡞ൻ㔚᳇ផㅴ ߦ㑐ߔࠆ⎇ⓥળޠࠍޔቝቮ⥶ⓨ⎇ⓥ㐿⊒ᯏ᭴ਥ௅㧛ήੱቝቮታ㛎ࠪࠬ࠹ࡓ⎇ⓥ

㐿⊒ᯏ᭴ᓟេߩరޔ㧞㧜㧜㧤ᐕ㧝㧜᦬㧞㧝ᣣ㧔Ἣ㧕 ޔ᧲੩࿖㓙ࡈࠜ࡯࡜ࡓߦߡ㐿

௅ߒޔ㧝㧜㧜ฬⷙᮨߩߏෳടࠍ㗂߈߹ߒߚޕᧄႎ๔ᦠߪޔ⎇ⓥળߦߡ⊒⴫ߐࠇ ߚ⻠Ṷࠍ෼㍳ߔࠆ߽ߩߢߔޕ੹ᓟߩᄢဳ㔚᳇ផㅴߩ⊒ዷߦᧄᦠ߇⽸₂ߢ߈ࠆߎ ߣࠍᦼᓙߒ߹ߔޕ

㩷 㩷 㩷

㧞㧜㧜㧥ᐕ㧞᦬㩷 㩷

ቝቮ⥶ⓨ⎇ⓥ㐿⊒ᯏ᭴㩷

᫃ේ ၷ৻

࿡ਛ ဋ㩷

By

Kenichi KAJIWARA*

Abstract㧦JAXA⎇ⓥ㐿⊒ㇱ㐷ߩౣ✬ߦ઻޿ޔᓥ᧪ޔ⎇ⓥ㐿⊒ᧄㇱ߅ࠃ߮ቝቮ⑼ቇ⎇ⓥᧄㇱߦ୘ޘ

ߦ⸳⟎ߐࠇߡ߈ߚࡊࡠࠫࠚࠢ࠻ࠍᡰេߔࠆኾ㐷ᛛⴚᜂᒰࠣ࡞࡯ࡊߩㅪ៤ࠍ࿑ߞߡ޿ࠆޕផㅴᛛⴚ

ࠣ࡞࡯ࡊ߽ߘߩ㧝ߟߣߒߡ⚵❱ൻߐࠇߚޕᧄ⚵❱ߦࠃࠆޔ੹ᓟߩ㔚᳇ផㅴߦଥࠊࠆ⎇ⓥ㐿⊒߳ߩ ขࠅ⚵ߺࠍ⚫੺ߔࠆޕ

Key words㧦ផㅴ♽ࠣ࡞࡯ࡊޔផㅴᛛⴚޔ㔚᳇ផㅴޔᛛⴚࡠ࡯࠼ࡑ࠶ࡊޔ⹜㛎ⵝ⟎

1. ߪߓ߼ߦ

ᐔᚑ20ᐕ10᦬1ᣣࠍએߞߡቝቮ⥶ⓨ⎇ⓥ㐿⊒ᯏ᭴(JAXA)ߪഃ┙5๟ᐕࠍㄫ߃ߚޕߘࠇߦవ┙ߜหᐕ4᦬1 ᣣ߆ࠄ╙㧞ᦼਛᦼ⸘↹ߦ⒖ⴕߒߚޕቝቮ⑼ቇ⎇ⓥᚲ(ISAS)ޔ⥶ⓨቝቮᛛⴚ⎇ⓥᚲ(NAL)ޔቝቮ㐿⊒੐ᬺ࿅(NASDA) 㧟ᯏ㑐⛔วߩᦨ߽ᦼᓙߔࠆߣߎࠈߪੱ⊛⾗↥ࠍ฽߻࡝࠰࡯ࠬߩ᦭ലᵴ↪ߢ޽ࠆޕߎߩ⿰ᣦߦၮ߈ޔ⎇ⓥ㐿⊒ㇱ㐷 ߦߟ޿ߡ߽ല₸⦟޿ᯏ⢻⊒ើࠍ⋡ᜰߒౣ✬ࠍ࿑ߞߡ߈ߚޕߘߩ⚿ᨐޔࡊࡠࠫࠚࠢ࠻ㆀⴕࠍᡰ߃ࠆኾ㐷ᛛⴚࠍᜂᒰ ߔߴ߈ࠣ࡞࡯ࡊࠍ⼂೎ߒޔฦࠣ࡞࡯ࡊߦᒝജߥࡊࡠࠫࠚࠢ࠻ᡰេࠍᦼᓙߒߡ޿ࠆޕ

ផㅴ♽߽ߘߩ㧝ࠣ࡞࡯ࡊߢ޽ࠆޕ੹ᓟߩᛛⴚࡠ࡯࠼ࡑ࠶ࡊߩ╷ቯޔ⎇ⓥ㐿⊒ߩㆀⴕߪޔᓥ೨ߩฦᧄㇱ࡮⚵❱߇ ᜬߟ․㐳ࠍዅ㊀ߒߟߟ߽ޔ੐ߦᒰߚߞߡߪ৻ਣߣߥߞߚขࠅ⚵ߺ߇ᦼᓙߐࠇߡ޿ࠆޕߘߩࠃ߁ߥⅣႺߦ޽ߞߡޔ 㔚᳇ផㅴߩᔕ↪᜛ᄢޔᛛⴚ⊒ዷߦᒰߚࠅޔJAXAផㅴᛛⴚࠣ࡞࡯ࡊ߇JAXAߩߺߥࠄߕޔALL-JAPANߩ⎇ⓥ⠪

ߩਛߢᜂ߁ߴ߈ᓎഀࠍ⹺⼂ߒޔᐢߊදജࠍઔ߉ߚ޿ޕ

2. ផㅴDE⚵❱

2.1. DE⚵❱

DE(Disciplinary Engineering)ޔ”Discipline”ߩ╙㧝⟵ߪޟ⸠✵ޠޟ㎊㍰ޠ╬ߩ߶߆ޔޟቇ໧(ಽ㊁)ޠߣ޿߁ᗧ๧

ࠍᜬߜޔJAXAߢߪޟኾ㐷ᛛⴚޠߣ޿߁ᗧ๧ߢ↪޿ߡ޿ࠆޕහߜޔࡠࠤ࠶࠻ޔⴡᤊޔ᦭ੱ╬ߩࡊࡠࠫࠚࠢ࠻ࠍᡰ ߃ࠆޟኾ㐷ᛛⴚޠ޽ࠆ޿ߪߎࠇࠄࠍ᭴ᚑߔࠆࠨࡉࠪࠬ࠹ࡓޔࠦࡦࡐ࡯ࡀࡦ࠻ࠍᛒ߁ޟኾ㐷ᛛⴚޠࠍᜰߔޕ

⺃ዉ࡮೙ᓮޔ᭴ㅧ㨯ᯏ᭴ޔ㔚Ḯޔㅢାޔផㅴߥߤߩࠃ߁ߦቝቮᯏࠍ᭴ᚑߔࠆࠨࡉࠪࠬ࠹ࡓߦ㒢ࠄߕޔ゠㆏࡮⥶ᴺޔ ᵹ૕ޔቝቮⅣႺߥߤߩࠃ߁ߥ⸃ᨆᛛⴚ߽฽߹ࠇࠆޕ

2.2. DE⚵❱ߩౣ✬

㧟ᯏ㑐⛔วᓟ߽ࡠࠤ࠶࠻ޔⴡᤊࡊࡠࠫࠚࠢ࠻ߪ╳ᵄޔ⋧ᮨේߣ೎ࠇߡሽ࿷ߒޔ⺞Ꮣߦߪ⥶ⓨࡊࡠࠣ࡜ࡓ߇ሽ࿷

ߒߚޕߘߒߡฦ࿾඙ߩ⎇ⓥ㐿⊒ㇱ㐷߇ෳ↹࡮ᡰេࠍⴕࠊࠇߡ߈ߚޕ߹ߚޔ৻ㇱߢߪ✭߿߆ߥㅪ៤ߦࠃࠅ⋧੕ᡰេ

߽ⴕࠊࠇߡ޿ࠆޕߒ߆ߒޔ⛔วߩ⿰ᣦࠍ〯߹߃ޔੱ⊛⾗↥ߩ᦭ലᵴ↪ߣࠃࠅᒝജߥࡊࡠࠫࠚࠢ࠻߳ߩᡰេࠍ⋡ᜰ

㧖 Propulsion Group, Aerospace Research and Development Directorate (ARD) /JAXA

2

ߒޔ╳ᵄޔ⋧ᮨේޔ⺞Ꮣߦಽᢔߔࠆ⎇ⓥ㐿⊒ㇱ㐷ߩ⛔วࠍ࿑ࠆߎߣ߇ᦸ߹ࠇࠆޕߎࠇߪᔅߕߒ߽࿾ၞ⊛㓸⚿ࠍᗧ

๧ߒߡ޿ߥ޿߇ޔฦࡈࠖ࡯࡞࠼ߦಽᢔߒߟߟ߽౒ㅢߔࠆDE⚵❱߇หߓ⺖㗴ߦදജߒߡขࠅ⚵ߺޔࠃࠅᒝജߥᚑ ᨐࠍ᜼ߍࠆߎߣࠍᦼᓙߒߡ޿ࠆޕ

ߘߩ⒖ⴕᲑ㓏ߣߒߡᐔᚑ20ᐕ4᦬1ᣣ╳ᵄ࡮⺞Ꮣ㧔⎇ⓥ㐿⊒ᧄㇱ㧕ߣ⋧ᮨේ㧔ቝቮ⑼ቇ⎇ⓥᧄㇱ㧕ߦ౒ㅢߔ ࠆDE⚵❱ࠍ⸳⟎ޔޟផㅴ♽ࠣ࡞࡯ࡊޠ߽ߘߩਔᧄㇱߦ⟎߆ࠇߡ޿ࠆޕ㧔࿑㧝ෳᾖ㧕

䊶䊶 䊶䊶 䊶

ℂ੐㐳

೽ℂ੐㐳 ℂ੐

⋙੐

⋙ᩏቶ

✚ോㇱ

ੱ੐ㇱ

᦬䊶ᖺᤊតᩏ䊒䊨䉫䊤䊛䉫䊦䊷䊒

ᐢႎㇱ

⹏ଔ䊶⋙ᩏቶ

ቝቮャㅍ䊚䉾䉲䊢䊮ᧄㇱ ቝቮ೑↪䊚䉾䉲䊢䊮ᧄㇱ

᦭ੱቝቮⅣႺ೑↪䊚䉾䉲䊢䊮ᧄㇱ

⎇ⓥ㐿⊒ᧄㇱ

⚻༡ડ↹ㇱ

↥ቇቭㅪ៤ㇱ

ቝቮ⑼ቇ⎇ⓥᧄㇱ

⥶ⓨ䊒䊨䉫䊤䊛䉫䊦䊷䊒

࿑㧝 JAXA⚵❱࿑ᛮ☴

2.3. DE⚵❱ߩᓎഀ

DE⚵❱ߩ╙৻ߩᓎഀߪฦޘ߇ᜂᒰߔࠆኾ㐷ᛛⴚࠍᅤ૗ߦ⊒ዷߐߖࠆ߆ޔߘߩ⸘↹ߣផㅴࠍᜂ߁ߎߣߢ޽ࠆޕ හߜޔ዁᧪ࡊࡠࠫࠚࠢ࠻ߢណ↪ߐࠇࠆߴ߈ផㅴ♽ߩ᭴ᗐࠍ✵ࠅޔߘߎߦะ߆߁ߚ߼ߩࡠ࡯࠼ࡑ࠶ࡊࠍ⸳ቯߔࠆޕ ᱜߦޟ㔚᳇ផㅴߦ㑐ߔࠆ⎇ⓥળޠ㐿௅⿰ᣦߩታ⃻ࠍ⋡ᜰߔታⴕㇱ㓌ߦઁߥࠄߥ޿ޕ

╙ੑߩᓎഀߪฦޘ߇ኾ㐷ᛛⴚ⢻ജࠍએߞߡJAXA߇ㆀⴕߔࠆࡊࡠࠫࠚࠢ࠻ࠍᡰេߔࠆߎߣߢ޽ࠆޕฦࡊࡠࠫࠚ

ࠢ࠻ߢㅴ߼ࠄࠇࠆ㐿⊒૞ᬺߦෳ↹ߒޔផㅴ♽ࠨࡉࠪࠬ࠹ࡓߩ᭴▽ޔࠦࡦࡐ࡯ࡀࡦ࠻ߩ㐿⊒ࠍᜂᒰߔࠆޕ㔚᳇ផㅴ ߩ႐วߪ᭴ᚑᯏེߩ㐿⊒ޔᬌ⸽ޔ⁁ᴫߦࠃߞߡߪㆇ↪⸘↹┙᩺߹ߢ㑐ࠊࠆߎߣߦߥࠆޕ

╙ਃߩᓎഀߪੱ᧚ߩ⢒ᚑߢ޽ࠆޕߎࠇߦߪฦDE⚵❱ߢᵴേߔࠆ⎇ⓥ⠪࡮ᛛⴚ⠪ߩ⢒ᚑߦ㒢ࠄߕޔࡊࡠࠫࠚࠢ

࠻⚵❱ߢߩᵴേߦ㓙ߒޔࠪࠬ࠹ࡓߣࠨࡉࠪࠬ࠹ࡓߩ㑆ࠍขࠅᜬߟⷐຬߦᔅⷐߥ⍮⼂ᢎ⢒߽฽߹ࠇࠆޕ

3. JAXAߩᣇ㊎

3.1. 㐳ᦼࡆ࡚ࠫࡦ

ᐔᚑ17ᐕ(2005ᐕ)4᦬ޔ㐳ᦼࡆ࡚ࠫࡦJAXA2025ࠍ╷ቯߒߚޕ

ޡ਎⇇ᦨ㜞ߩା㗬ᕈߣ┹੎ജߩ޽ࠆࡠࠤ࠶࠻߿ੱᎿⴡᤊࠍ㐿⊒ߒޔ቟ోߢ⼾߆ߥ␠ળߩታ⃻ߦ⽸₂ߔࠆޕ߹ߚޔ

࠻࠶ࡊࠨࠗࠛࡦࠬࠍផㅴߔࠆߣߣ߽ߦޔ⁛⥄ߩ᦭ੱቝቮᵴേ߿᦬ߩ೑↪߳ߩḰ஻ࠍㅴ߼ࠆޕߐࠄߦࡑ࠶ࡂ㧡ࠢ࡜

ࠬߩᭂ⿥㖸ㅦታ㛎ᯏߩታ⸽ࠍⴕ߁ޕߎࠇࠄߦࠃࠅޔቝቮ⥶ⓨߩၮᐙ↥ᬺൻߦ⽸₂ߔࠆޕޢ ߎࠇߦၮߊౕ૕⊛ߥᵴേᜰ㊎ߪએਅߩߣ߅ࠅߢ޽ࠆޕ

i ቝቮ⥶ⓨᛛⴚࠍᵴ↪ߔࠆߎߣߢޔ቟ోߢ⼾߆ߥ␠ળߩታ⃻ߦ⽸₂ߔࠆޕ i ቝቮߩ⻘ߣน⢻ᕈࠍត᳞ߔࠆߎߣߢޔ⍮ߩഃㅧߣᵴേ㗔ၞߩ᜛ᄢߦ⽸₂ߔࠆޕ i ਎⇇ᦨ㜞ߩᛛⴚߦࠃࠅޔ⥄࿷ߥቝቮᵴേ⢻ജࠍ⏕┙ߔࠆޕ

i ⥄┙ᕈߣ࿖㓙┹੎ജࠍ߽ߟቝቮ↥ᬺ߳ߩᚑ㐳ߦ⽸₂ߔࠆޕ

i ⥶ⓨ↥ᬺߩᚑ㐳߳ߩ⽸₂ߣ዁᧪⥶ⓨャㅍߩࡉ࡟࡯ࠢࠬ࡞࡯ࠍ߼ߑߔޕ

3.2. ⎇ⓥ㐿⊒⸘↹߳ߩዷ㐿

㐳ᦼࡆ࡚ࠫࡦታ⃻ߦะߌߚౕ૕⊛ߥᵴേᜰ㊎ࠍㆀⴕߔࠆߚ߼ߦฦࡒ࠶࡚ࠪࡦᧄㇱޔࡊࡠࠣ࡜ࡓࠣ࡞࡯ࡊߦߪޔ

ో૕ࡠ࡯࠼ࡑ࠶ࡊ㆐ᚑߦᔅⷐߥࡒ࠶࡚ࠪࡦ⸳ቯޔහߜޔࡒ࠶࡚ࠪࡦࡠ࡯࠼ࡑ࠶ࡊߩ╷ቯ߇᳞߼ࠄࠇࠆޕߘߒߡޔ ߘߩࡒ࠶࡚ࠪࡦ㆐ᚑߦᔅⷐߥᛛⴚߪ૗߆㧫 ࠨࡉࠪࠬ࠹ࡓᛛⴚޔࠦࡦࡐ࡯ࡀࡦ࠻ߩ᛽಴߇ⴕࠊࠇࠆޕ

ฦࠨࡉࠪࠬ࠹ࡓޔࠦࡦࡐ࡯ࡀࡦ࠻ߪޔㅢᏱߪ⃻ᤨὐߢ㆐ᚑߐࠇߡ޿ߥ޿ᛛⴚߢ޽ࠅޔ⃻࿷ߩ࡟ࡌ࡞߆ࠄᅤ૗ߦ ߘߩ⋡ᮡߣߔࠆ࡟ࡌ࡞ߦᒁ߈਄ߍࠍ࿑ࠆ߆ࠍ⸘↹ߒߥߌࠇ߫ߥࠄߥ޿ޕߘߩ㆏╭ޔᚻᴺ߇ᛛⴚࡠ࡯࠼ࡑ࠶ࡊߣߒ ߡ⸳ቯߐࠇࠆߎߣߦߥࠆޕ

⸳ቯߐࠇߚᛛⴚࡠ࡯࠼ࡑ࠶ࡊߦᓥ޿ޔฦᲑ㓏ࠍㅊߞߡ⎇ⓥ㐿⊒㗄⋡ߩಾࠅ಴ߒ߇ⴕࠊࠇࠆޕහߜޔౕ૕⊛ߦⴕ ߞߡ޿ߊߴ߈⎇ⓥߩౝኈ࡮⹜㛎╬߇⸘↹ߐࠇࠆࠊߌߢ޽ࠆޕฦ⎇ⓥ⸘↹߅ࠃ߮ߘࠇߦኻᔕߒߚ⎇ⓥᚑᨐߪߘࠇߙ ࠇߩᲑ㓏ߢ⹏ଔࠍฃߌࠆޕߎߩ⹏ଔߣ⎇ⓥࠍขࠅᏎߊࡊࡠࠫࠚࠢ࠻ߩㅴ᝞ߦวࠊߖޔᛛⴚࡠ࡯࠼ࡑ࠶ࡊߩᣂߚߥ

╷ቯޔ⛽ᜬ߅ࠃ߮⎇ⓥ⸘↹ߩ⸳ቯࠍⴕߞߡ޿ߊߎߣ߽DE⚵❱ߩᓎഀߢ޽ࠆޕ

3.3. 㐳ᦼࡆ࡚ࠫࡦߦ߅ߌࠆ㔚᳇ផㅴߩ૏⟎ઃߌ

೨⸥ߩᎿ⒟ࠍ㔚᳇ផㅴ⎇ⓥߦᒰߡ፰߼ࠆߣߤߩࠃ߁ߥߎߣߦߥࠆ߆ޕ╙৻ߪޟౕ૕⊛ߥᵴേᜰ㊎ޠㆀⴕߦ㓙ߒ 㔚᳇ផㅴᵴべߩ႐ࠍ⷗಴ߔߎߣߢ޽ࠆޕහߜޔᄢ㊂ߩࡑ࠿࡯ࡃࠍᔅⷐߣߔࠆࡒ࠶࡚ࠪࡦࠍ࠲࡯ࠥ࠶࠻ߣߒߡᝒ߃ޔ ߘߎ߳ߩㆡ↪ࠍ⋡ᮡߣߒߚᛛⴚࡠ࡯࠼ࡑ࠶ࡊࠍ⸳ቯߔࠆߎߣߦߥࠆޕ

4. JAXAߦ߅ߌࠆ㔚᳇ផㅴࡒ࠶࡚ࠪࡦ

4.1. 㔚᳇ផㅴ⎇ⓥߩ⚻✲

㔚᳇ផㅴ⎇ⓥߪJAXA⸳┙એ೨߆ࠄISASޔNALޔNASDAฦᯏ㑐ߦ߅޿ߡㅴ߼ࠄࠇߡ߈ߚޕ

ISASߢߪMPDࠕ࡯ࠢࠫࠚ࠶࠻ޔDCࠕ࡯ࠢࠫࠚ࠶࠻ޔࡎ࡯࡞ࠬ࡜ࠬ࠲ޔࠗࠝࡦࠛࡦࠫࡦ(Ǵ10)ޔࡄ࡞ࠬࡊ࡜

࠭ࡑࠬ࡜ࠬ࠲(PPT)ޔ⏛᳇ࡊ࡜࠭ࡑ࠮ࠗ࡞ߩ⎇ⓥ߇ⴕࠊࠇߡ߈ߚޕߘߒߡޔࠗࠝࡦࠛࡦࠫࡦǴ10߇ዊᖺᤊតᩏⴡ ᤊޟߪ߿߱ߐޠߦタࠅޔࠗ࠻ࠞࡢ߳ߩ⥶ⴕߦነਈߒߚޕ߹ߚޔSFUߢߪMPDࠕ࡯ࠢࠫࠚ࠶࠻ߩቝቮታ⸽߇ⴕࠊ ࠇߚޕ

NALߢߪࠗࠝࡦࠛࡦࠫࡦ⎇ⓥ߇⛮⛯⊛ߦⴕࠊࠇޔផജ߽2mNޔ20mNޔ150mNߣᄢဳൻ߇࿑ࠄࠇߚޕޟ߈ߊ 㧠ภޠޔޟ߈ߊ㧢ภޠߢNAL/NASDA౒ห⎇ⓥߩᚑᨐߣߒߡ2mNޔ20mNߩࠗࠝࡦࠛࡦࠫࡦߩ៞タߦነਈߒߚޕ NASDAߢߪផജ2mNޔ20mNߩࠗࠝࡦࠛࡦࠫࡦޔ㔚ᾲᑼࡅ࠼࡜ࠫࡦࠬ࡜ࠬ࠲(EHT)ޔDCࠕ࡯ࠢࠫࠚ࠶࠻ߩ

⎇ⓥ߇ⴕࠊࠇߚޕޟ߈ߊ㧠ภޠߢߪ2mNࠗࠝࡦࠛࡦࠫࡦ߇៞タޔ゠㆏਄ߢㆇ↪ߒߚޕޟ߈ߊ㧢ภޠޔޟ߆ߌߪߒޠޔ ޟ߈ߊ㧤ภޠߦߪ޿ߕࠇ߽20mNࠗࠝࡦࠛࡦࠫࡦࠍධർ゠㆏೙ᓮ↪ផㅴ♽ߣߒߡ៞タߒߚޕޟ߈ߊ㧢ภޠߦߪታ 㛎ᯏེߣߒߡEHT߽៞タߒߚޕ

ධർ゠㆏೙ᓮ↪ផㅴ♽ߣߒߡ៞タߒߚೋ߼ߩ㧞ⴡᤊߪࠕࡐࠫផㅴ♽ޔᛂ਄ߍࡠࠤ࠶࠻ߩਇౕวߦࠃࠅ㕒ᱛ゠㆏

ߦߪ⥋ࠄߕޔࠗࠝࡦࠛࡦࠫࡦߪᧄ᧪ߩࡒ࠶࡚ࠪࡦࠍᨐߚߖߥ߆ߞߚ߇ޔޟ߈ߊ㧤ภޠߢೋ߼ߡධർ゠㆏೙ᓮ↪ផㅴ

♽ߣߒߡߩᓎ⋡ࠍᨐߚߔߎߣ߇಴᧪ߚޕߎࠇߦࠃࠅޟߪ߿߱ߐޠ߇ታ⸽ߒߚᖺᤊ㑆ߩേജ⥶ⴕߣߣ߽ߦޔࠗࠝࡦ

ࠛࡦࠫࡦߩਥⷐߥ㧞ߟߩ↪ㅜࠍ࿖↥ᛛⴚߦࠃࠅታ⃻ߒߚߎߣߦߥߞߚޕ

4.2. 㔚᳇ផㅴ⎇ⓥߩ⃻⁁

ޟߪ߿߱ߐޠߣޟ߈ߊ㧤ภޠߩ㧞ߟߩ㔚᳇ផㅴ៞タࡒ࠶࡚ࠪࡦ߇⎇ⓥ㐿⊒ߦ߅޿ߡㆊ෰ߩ‛ߣߥߞߚ⃻࿷ޔᣂ ߚߥࡒ࠶࡚ࠪࡦࠍ㐿ᜏߒߥߌࠇ߫ߥࠄߥ޿ޕ߭ߣߟߪ⿥ૐ㜞ᐲⴡᤊ⹜㛎ᯏ↪ࠗࠝࡦࠛࡦࠫࡦߩ⎇ⓥߢ޽ࠆޕ⿥ૐ 㜞ᐲⴡᤊߪ࠮ࡦࠨߩ㜞ಽ⸃⢻ൻߣૐᶖ⾌㔚ജൻࠍታ⃻ߔࠆ৻ߟߩ⸃ߣߒߡޔⴡᤊࠍ⿥ૐ㜞ᐲߢ๟࿁ߐߖࠆ᭎ᔨߢ

޽ࠆޕߘߩ㓙ޔ゠㆏㜞ᐲߩ⛽ᜬߦᔅⷐߥᄢ᳇ᛶ᛫⵬ఘࠍ㔚᳇ផㅴߦࠃࠅⴕ߁ޕ

4

ㆬቯޔޟ߈ߊ㧤ภޠ៞タࠗࠝࡦࠛࡦࠫࡦࠍࡌ࡯ࠬߦㆡ↪ߦᔅⷐߥᡷ⦟⎇ⓥࠍⴕߞߡ޿ࠆޕ

৻ᣇޔޟߪ߿߱ߐޠ៞タࠗࠝࡦࠛࡦࠫࡦ(Ǵ10)ࠍࡌ࡯ࠬߣߒߚᄢဳൻޔᡷ⦟ൻߦࠃࠆᣂߚߥࡒ࠶࡚ࠪࡦ߳ߩㆡ↪

ࠍ⋡ᜰߒߚ㔚᳇ផㅴߩ⎇ⓥ߽ㅴ߼ࠄࠇߡ޿ࠆޕ߹ߚޔᷓቝቮតᩏޔ⏛᳇࠮ࠗ࡞ⴡᤊ៞タࠍᗐቯߒߚPPTޔ⏛᳇ࡊ

࡜࠭ࡑ࠮ࠗ࡞ޔࠃࠅᄢផജߥࠗࠝࡦࠛࡦࠫࡦ⎇ⓥ߽ⴕࠊࠇߡ޿ࠆޕ

5. ੹ᓟߩᄢဳࡒ࠶࡚ࠪࡦ߳ߩኻᔕ

5.1. ᄢဳࡒ࠶࡚ࠪࡦߩഃ಴

ධർ゠㆏೙ᓮޔᖺᤊ㑆ߩേജ⥶ⴕߐࠄߦ⿥ૐ㜞ᐲߦ߅ߌࠆᄢ᳇ᛶ᛫ߩ⵬ఘߣ޿߁ޔ㔚᳇ផㅴ߇ᜂ߃ࠆᓎഀࠍታ

⃻߽ߒߊߪታ⃻ߒߟߟ޽ࠆޕ㔚᳇ផㅴᛛⴚߩᦝߥࠆ⊒ዷߩߚ߼ߦߪޔࠃࠅ㔍ᤃᐲߩ㜞޿⋡ᮡ߇ᔅⷐߢ޽ࠆޕߘߩ ߚ߼ߦߪ㔚᳇ផㅴ៞タߦࠃࠅᄢ᏷ߥ೑ᓧ߇ᓧࠄࠇࠆޔ޽ࠆ޿ߪ㔚᳇ផㅴ៞タߥߒߢߪታ⃻ߒᓧߥ޿ࡒ࠶࡚ࠪࡦࠍ

ഃ಴ߔࠆߎߣ߇᳞߼ࠄࠇࠆޕ㔚᳇ផㅴ߇ᄢ߈ߥነਈࠍᨐߚߔ᧦ઙޔߘࠇߪ⸒߁߹ߢ߽ߥߊޔ 1) ᄢ㊂ߩ‛⾗ࠍャㅍߔࠆޕහߜޔ᦭ੱ⸘↹ޔ゠㆏㑆ャㅍޔᄥ㓁⊒㔚ⴡᤊߥߤޕ

2) ㆙ߊ߳ⴕߊޕᄢ߈ߥǍV߇ⷐ᳞ߐࠇࠆޕහߜޔᖺᤊតᩏᯏߥߤޕ 3) 1) ߅ࠃ߮2) ߩⶄวࡒ࠶࡚ࠪࡦޕ

ߢ޽ࠆޕ㐳ᦼࡆ࡚ࠫࡦ߆ࠄᗐቯߐࠇࠆࡒ࠶࡚ࠪࡦࡠ࡯࠼ࡑ࠶ࡊߢߪԘቝቮ᷹ⷰޔᄥ㓁♽តᩏޔԙ᦬តᩏ㨯೑↪߇᦭

ജߥᔕ↪వߣ⋡ߐࠇࠆޕ߹ߚޔቝቮャㅍࠪࠬ࠹ࡓߩ߁ߜԚ᦭ੱャㅍᛛⴚߩ⏕┙߳ߩነਈ߽ᦼᓙߢ߈ࠆޕ㧔࿑㧞ෳᾖ㧕

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࿑㧞 JAXA㐳ᦼࡆ࡚ࠫࡦో૕ࡠ࡯࠼ࡑ࠶ࡊߣ㔚᳇ផㅴ៞タ୥⵬

ߒ߆ߒޔޟ㔚᳇ផㅴޠߪ㒢ࠄࠇߚ▸࿐ߢߪ⦟ߊ⍮ࠄࠇߚᛛⴚߢ޽ࠆ߇ޔቝቮᯏࠪࠬ࠹ࡓࠍᛒ߁ᜂᒰ⠪ߦⷫߒߺ߇

޽ࠆᛛⴚߣߪ⸒޿㔍޿ޕ޿ߊࠄࡒ࠶࡚ࠪࡦ㆐ᚑߦᄙᄢߥ⽸₂ࠍߔࠆᛛⴚߢ޽ߞߡ߽ޔ⢄ᔃߩᜂᒰ⠪߇ߘߩሽ࿷࡮

೑ὐߦ᳇ઃ޿ߡߊࠇߥߌࠇ߫ណ↪ߐࠇߥ޿ޕᓥߞߡޔ੹ᓟߪᣂߚߥ៞タࡒ࠶࡚ࠪࡦ୥⵬వߦะߌޔ㔚᳇ផㅴߩ໪

⊒߇ᔅⷐߢ޽ࠆޕߘߒߡޔߘߩ᦭↪ᕈࠍ⍮ߞߡ߽ࠄ߁ߎߣߦࠃࠅޔᣂߚߥࡒ࠶࡚ࠪࡦഃ಴߽ᦼᓙߢ߈ࠆޕ ߎࠇࠄߩ૞ᬺߦะߌޔ⃻࿷ߩ㔚᳇ផㅴᛛⴚࠍ✚ⷩߒޔ࡙࡯ࠩߦኻߒ᧪ࠆߴ߈ᤨᦼߦ߅޿ߡ㆐ᚑߒᓧࠆᛛⴚ࡟ࡌ

࡞ࠍ␜ߐߥߌࠇ߫ߥࠄߥ޿ޕߘߩߚ߼ߦߪ⃻࿷ߣ⋡ᮡߩ㑆ߦ޽ࠆᛛⴚࠡࡖ࠶ࡊࠍ⹺⼂ߒޔ⎇ⓥ㗄⋡ࠍ᣿ࠄ߆ߦߒ ߚࡠ࡯࠼ࡑ࠶ࡊࠍ╷ቯߒߚ߁߃ߢޔฦ⎇ⓥ㗄⋡ߩಽᜂࠍ᳿߼ޔࡒ࠶࡚ࠪࡦ஥߳ߩࠕࡊࡠ࡯࠴ޔ੍▚₪ᓧߩദജࠍ ᛄ߁ߎߣߦߥࠆޕ

5.2. ⎇ⓥ㐿⊒૕೙

೨ㅀߩᄢဳࡒ࠶࡚ࠪࡦߩഃ಴ࠍ⷗ᝪ߃ޔᄢ߈ߊ㧟ߟߩᯏ⢻ࠍᨐߚߔߴߊ⎇ⓥ૕೙૞ࠅ߇᳞߼ࠄࠇࠆޕ i ᛛⴚࡠ࡯࠼ࡑ࠶ࡊߩ╷ቯߣዷ㐿

⃻࿷ߩ㔚᳇ផㅴߩᛛⴚ࡟ࡌ࡞߆ࠄ᧪ࠆߴ߈ᄢဳࡒ࠶࡚ࠪࡦߦᔅⷐߥ࡟ࡌ࡞߳ߩᒁ߈਄ߍߦᔅⷐߥ⎇ⓥ⺖㗴 ࠍ⼂೎ߒޔ⎇ⓥ⸘↹ߣߘࠇࠍᜂ߁ታⴕㇱ㓌ࠍ⸳ቯߔࠆޕߎߎߦߪALL JAPANߩ㔚᳇ផㅴ⎇ⓥ⠪ޔᛛⴚ⠪߇ ಽᜂߒߡขࠅដ߆ࠆߎߣ߇᳞߼ࠄࠇࠆޕ㧔࿑㧟ᛛⴚࡠ࡯࠼ࡑ࠶ࡊ଀㧕

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㔚᳇ផㅴߦଥࠊࠆ⎇ⓥᵴേࠍޟ㔚᳇ផㅴ㑐ଥ⠪ޠᄖߦᐢߊ⊒ାߒޔࡒ࠶࡚ࠪࡦഃ಴߇ᦼᓙߐࠇࠆ႐߅ࠃ߮ߘ

6

i ⎇ⓥ㐿⊒૕೙ߩᢛ஻

⎇ⓥ㐿⊒ߩ࡝࠰࡯ࠬޔහߜੱ⊛⾗↥ߩలታൻߣALL JAPAN⎇ⓥ⠪࡮ᛛⴚ⠪ߩࠃࠅᵴ⊒ߥ੤ᵹࠍ࿑ࠆߚ߼

ߦޔߘߩ᜚ࠅᚲߣߥࠆᒝജߥ⹜㛎⸳஻ߩ₪ᓧࠍ⋡ᜰߔޕ㧔࿑㧠ෳᾖ㧕

5.3. ࠗࡦࡈ࡜ᢛ஻

⃻࿷JAXA߇ᚲ᦭ߔࠆ㔚᳇ផㅴ⹜㛎ⵝ⟎ߪޔ 1) Ǵ10㐿⊒ߦ૶↪ߒߚⵝ⟎㧔⋧ᮨේࠠࡖࡦࡄࠬ㧕

2) 35cmࠗࠝࡦࠛࡦࠫࡦ⎇ⓥ↪ⵝ⟎㧔⺞Ꮣ⥶ⓨቝቮᛛⴚ࠮ࡦ࠲࡯㧕

ߩ㧞ߟߢ޽ࠆޕޟ߈ߊ㧢ภޠએ㒠૶↪ߒߚ╳ᵄቝቮ࠮ࡦ࠲࡯ߩ⹜㛎ⵝ⟎ߪᣢߦㆇ↪ࠍ⚳ੌߒߡ߅ࠅޔ೨ㅀߩᄢဳࡒ

࠶࡚ࠪࡦߦኻᔕߒߚ㔚᳇ផㅴߩ⎇ⓥ㐿⊒ࠍᡰេߢ߈ࠆ⸳஻ߪJAXAߦߪޔᓥߞߡޔᣣᧄߦߪߥ޿ޕ

ᄢဳࡒ࠶࡚ࠪࡦࠍഃ಴ߒޔߎࠇࠍ࠲࡯ࠥ࠶࠻ߣߒߚ㔚᳇ផㅴᯏߩᕈ⢻⹜㛎ޔᯏ⒳⹺ቯޔ៞タຠߩฃ౉⹜㛎ࠍⴕ ߁ߛߌߢ߽ޔߎߩ㔚᳇ផㅴᯏߦ⷗ว߁⹜㛎ⵝ⟎߇ᔅⷐਇนᰳߢ޽ࠆޕหᤨߦߘࠇߪ੹ᓟߩᣂߚߥ㔚᳇ផㅴ⎇ⓥߩ COEᒻᚑߦነਈߔࠆޕ

ߒ߆ߒޔᣂߚߥ߆ߟᄢⷙᮨߥ㔚᳇ផㅴ⹜㛎ⵝ⟎ᢛ஻ߪᄙᄢߥ⾌↪ࠍᔅⷐߣߔࠆߎߣߪ᣿ࠄ߆ߢ޽ࠅޔනߦJAXA 㔚᳇ផㅴ⎇ⓥㇱ㐷ߩജߢᚑߒ߃ࠆ߽ߩߢߪߥߊޔALL-JAPANߩ⎇ⓥ⠪߇✚ജࠍ⚿㓸ߔࠆ႐ߣߒߡⷐ᳞ߒߡߎߘ ታ⃻ߒ߁ࠆ߽ߩߣ⠨߃ߡ޿ࠆޕ

6. ߅ࠊࠅߦ

⃻࿷ޔJAXA߇ㅴ߼ߡ޿ࠆ⎇ⓥ㐿⊒ㇱ㐷ౣ✬ߩ৻Ⅳߣߒߡޔ㔚᳇ផㅴ⎇ⓥࠍᜂ߁ផㅴDE⚵❱ߩ᭎ⷐߣߘߩᓎ

ഀࠍ␜ߒߚޕ߹ߚޔ㧟ᯏ㑐⛔วએ೨ࠍ฽߼ޔߎߩផㅴDE⚵❱ߢߎࠇ߹ߢ߆ߟ⃻࿷ㅴ߼ࠄࠇߡ޿ࠆ⎇ⓥ㐿⊒ࠍ⚫

੺ߒߚޕએ਄ࠍ〯߹߃ޔJAXA㐳ᦼࡆ࡚ࠫࡦߦ␜ߔᵴേᣇ㊎ߦᷝߞߚޔᣂߚߥ㔚᳇ផㅴᛛⴚ߇᳞߼ࠄࠇࠆᔕ↪ߩ ႐ࠍᮨ⚝ߒߚޕ

ᓥ᧪ޔ㔚᳇ផㅴߩㆡ↪ࡒ࠶࡚ࠪࡦߪዋߥߊޔቝቮᯏߩ㐿⊒ో૕߆ࠄ⷗ߡ߽ߘߩ⎇ⓥ߇භ߼ࠆഀวߪᄢ߈ߊߥ޿ޕ

߹ߚޔ೨ㅀߩߣ߅ࠅޔᣂߚߦഃ಴ߐࠇࠆߴ߈ᄢဳࡒ࠶࡚ࠪࡦߦኻᔕߒߚ㔚᳇ផㅴ⎇ⓥߪޔJAXAߛߌߢᚑߒㆀߍ ࠄࠇࠆ߽ߩߢߪߥ޿ޕᓥߞߡޔᣂߚߥ㔚᳇ផㅴߩ⊒ዷߦะߌALL-JAPANߩ⎇ⓥ⠪ฦ૏ߩᡰេࠍઔ߉ߚ޿ޕ

JAXA

ડ↹

䇭䊒䊨䉳䉢䉪䊃ㇱ㐷 ᄖ࿖䈱ᄢቇ䊶⎇

ⓥ⚵❱

⎇㐿䊶⑼ቇᧄㇱ ផㅴ♽䉫䊦䊷䊒 䋨㔚᳇ផㅴ䉼䊷䊛䋩

࿖ౝ䈱ᄢቇ䊶⎇

ⓥ⚵❱ ࿖ౝ䈱ડᬺ

ᄁ䉍ㄟ䉂䇮

⎇ⓥ੍▚

ណ↪ⷐ⺧䊶㐿

⊒ᡰេ䇮 㐿⊒੍▚

㔚᳇ផㅴ䊒䊨䉳䉢 䉪䊃䈱දജ

⺖㗴ଐ㗬䇮

⎇ⓥදജ

઀᭽⸳ቯ䇮

⵾ຠ㐿⊒

⹜㛎 ⵝ⟎

࿑㧠 㔚᳇ផㅴߩ⎇ⓥ㐿⊒૕೙᩺

8

ߔ㧚

߹ߚ㧘วᚑ㐿ญ࡟࡯࠳ߦࠃࠆ᷹ⷰߩ႐ว㧘ᔅⷐߣߥࠆ࡟࡯࠳ㅍାེߩ಴ജߪ㜞ᐲߩ3ਸ਼ߦᲧ଀ߔࠆߚ߼㧘㜞ᐲ ߇ૐߊߥߞߚಽ㧘࡟࡯࠳ㅍାᯏߩ⋭㔚ജൻ߇࿑ࠇ߹ߔ㧚ห᭽ߦᄢ᳇⚵ᚑߩ᷹ⷰߥߤ㧘᭽ޘߥ೑↪߇ᦼᓙߐࠇߟߟ

߽㜞಴ജ࡟࡯ࠩ࡯߇ᔅⷐߢ޽ߞߚⴡᤊ៞タLIDARߦߟ޿ߡ߽࡟࡯ࠩ࡯಴ജ߇ૐ಴ജߢ⦟޿ߎߣߦߥࠅ㧘ᣂߚߥ ⴡᤊ೑↪ߩ㆏߇㐿߆ࠇࠆߎߣ߇ᦼᓙߐࠇ߹ߔ㧚

2.1.3. ⿥ૐ㜞ᐲ゠㆏ߩ․ᓽ

ߘࠇߢߪ㧘ߎߎߢ⸒߁⿥ૐ㜞ᐲ゠㆏ߣߪ㧘ߤߩ᭽ߥ゠㆏ߢߒࠂ߁߆㧫߹ߕ㧘㜞ᐲߢߔ߇㧘㜞ᐲ200km⒟ᐲߩ

゠㆏ߢߔ㧚৻⥸ߦ㜞ᐲ400km ⒟ᐲࠃࠅૐ޿㜞ᐲߢߪ㧘ⓨ᳇ᛶ᛫ࠍ⵬ఘߔࠆߚ߼ߩⴡᤊ៞タߩផㅴ⮎㊂߇Ⴧടߔ ࠆߚ߼㧘․೎ߥ႐วࠍ㒰߈㧘޽߹ࠅ೑↪ߐࠇߡ޿߹ߖࠎ㧚ߎࠇ߹ߢߦ㧘㧶㧭㨄㧭ߩⴡᤊߢᦨ߽ૐ޿㜞ᐲࠍ๟࿁ߒ ߚⴡᤊߪ㧘ᾲᏪ㔎ᨋ᷹ⷰⴡᤊ㧔㨀㧾㧹㧹㧕ߢ޽ࠅ㧘ߘߩ㜞ᐲߪ350kmߢߔ㧚㜞ᐲ200kmઃㄭߢߪ㧘ㅢᏱߩⴡᤊ ߢ޽ࠇ߫㧘ⓨ᳇ᛶ᛫ߦࠃࠅਃᣣ߆ࠄ৻ㅳ㑆ߢ⪭ਅߒ߹ߔ㧚᰷Ꮊߢߪ㧘㊀ജ႐᷹ⷰߩߚ߼ߩⴡᤊGOCE ߩᛂߜ਄

ߍ߇⸘↹ߐࠇߡ޿߹ߔ߇㧘ߎߩⴡᤊߩ゠㆏߇250kmߩ࿾⃿๟࿁゠㆏ߢߔ㧚ߎߩⴡᤊ߽ࠗࠝࡦࠛࡦࠫࡦߢⓨ᳇ᛶ

᛫ࠍ⵬ఘߒߡ޿߹ߔ㧚

߹ߚ㧘৻ᣇߢ㧘㜞ᐲ160km⒟ᐲએਅߦߥࠆߣⓨജടᾲ߇ᕆჇߔࠆߚ߼㧘ⴡᤊߣߒߡߩ೑↪ߪ࿎㔍ߣߥࠅ߹ߔ㧚

࿑㧝㧚㜞ᐲߦࠃࠆᄢ᳇ኒᐲߩᄌൻ

ߎߩ200km⒟ᐲߩ゠㆏ߩ․ᓽࠍ␜ߔߚ߼㧘৻⥸ߦ๟࿁ⴡᤊߢࠃߊ૶ࠊࠇߡ޿ࠆ600kmߩ႐วߣᲧセߒߡ⹜▚

ߒߚ⚿ᨐࠍ⴫1ߦ␜ߒ߹ߔ㧚

㜞ᐲߪ⇣ߥࠅ߹ߔ߇㧘࿾⃿ඨᓘߦᲧߴࠇ߫Ꮕߪዊߐ޿ߚ߼㧘࿾⃿ࠍၮḰߣߔࠆߎߣߦߥࠆ゠㆏ㅦᐲ߿৻ᣣߩ࿾

⃿๟࿁࿁ᢙߦߟ޿ߡߪ㧘ᓥ᧪ߩ๟࿁゠㆏ߣ⿥ૐ㜞ᐲ゠㆏ߩ㑆ߦߪᄢ߈ߥᏅ⇣ߪ޽ࠅ߹ߖࠎ㧚

৻ᣇߢ㧘࿾⴫㕙ߣߩ㑐ଥߢ᳿߹ࠆ㊂ߦߟ޿ߡߪᏅ⇣߇ᄢ߈ߊ㧘࿾਄߆ࠄߩนⷞᤨ㑆ߪ৻⥸⊛ߥ๟࿁ⴡᤊߢߪ10 ಽ⒟ᐲ⏕଻ߢ߈ࠆߩߦኻߒߡ4ಽ⒟ᐲߣ⍴ߊߥࠅ߹ߔ㧚߹ߚ㧘ⴡᤊ߇ᆫ൓ࠍᝄߞߡ⷗ᷰߖࠆ▸࿐ߦߟ޿ߡ߽㜞ᐲ ߇ૐ޿ಽ⁜ߊߥࠅ߹ߔ㧚

゠㆏ߩⅣႺߦߟ޿ߡߪ㧘ᄢ᳇ኒᐲ߇㜞ߊ㧘ߎࠇߦ઻޿ᄢ᳇ᛶ᛫߇ᄢ߈޿ߎߣ㧘ⴡᤊ⴫㕙᧚ᢱ╬ߩഠൻࠍ߽ߚࠄ ߔේሶ⁁㉄⚛㊂߇ᄙ޿ߎߣ߇․ᓽߢߔ㧚ૉߒ㧘ᄢ᳇ኒᐲߪㅢᏱߩ๟࿁゠㆏ߦᲧߴߡ㜞޿ߣ޿ߞߡ߽㧘࿾਄⹜㛎ߢ

↪޿ࠆ⌀ⓨ࠴ࡖࡦࡃ࡯ਗߺߩ⌀ⓨᐲߢߔ㧚᡼኿✢ⅣႺߦߟ޿ߡߪ㧘ㅢᏱߩ๟࿁゠㆏ߣߪᄢ߈ߥ㆑޿ߪ޽ࠅ߹ߖࠎ㧚

⴫㧝㧚⿥ૐ㜞ᐲ゠㆏ߩ․ᓽ

゠㆏ ᓥ᧪ߩLEO ⿥ૐ㜞ᐲ゠㆏ ஻⠨

゠㆏㜞ᐲ 600㨗㨙 180㨗㨙

゠㆏ㅦᐲ 7,560 m/s 7,800 m/s ߶߷ᄌࠊࠄߥ޿

৻ᣣߩ๟࿁ᢙ 14.9 16.3 ࿾਄߆ࠄߩนⷞᤨ㑆 10 min 4 min ᆫ൓ࠍᝄߞߚ႐วߩ

᦭ലߥ࿾⴫นⷞ▸࿐ 2,070km 690km

⚂㧝㧛㧟ߣߥࠆ㧚 ኒᐲ

1.1 ˜10-13 kg/m3 5.2 ˜10-10 kg/m3

⌀ⓨ࠴ࡖࡦࡃ࡯ߪ 1.6˜10-10kg/m3 㧔㧝˜10-7torr⋧ᒰ㧕 ᄢ᳇ᛶ᛫

0.006 mN/m2 32 mN/m2 32mN/m2 ߢ ߪ 㧘 300kg

1m2ߩⴡᤊߢ10-5 G ේሶ⁁㉄⚛ 㧙 㜞ᐲ600kmߩ103୚

ⅣႺ

᡼኿✢ⅣႺ 㧙 㜞ᐲ600kmߩ0.63୚

2.2. ⿥ૐ㜞ᐲⴡᤊᛛⴚ⹜㛎ᯏ

ߎߩ᭽ߥ⿥ૐ㜞ᐲ゠㆏ࠍ⛮⛯⊛ߦ૶↪ߒߚ੐଀߇޽ࠅ߹ߖࠎߩߢ㧘㧶㧭㨄㧭ߢߪ㧘ታ↪ᯏߣߒߡ㧘ߎߩ⿥ૐ㜞 ᐲ゠㆏ࠍ૶↪ߔࠆ೨ߦ㧘゠㆏਄ߢߒ߆⏕⹺ߢ߈ߥ޿ᛛⴚ⊛ߥ⺖㗴ߩ⏕⹺ࠍⴕ߁⿥ૐ㜞ᐲⴡᤊᛛⴚ⹜㛎ᯏ㧔SLATS:

Super Low Altitude Test Satellite㧕ࠍ⸘↹ߒߡ޿߹ߔ㧚

SLATS ߩࡒ࠶࡚ࠪࡦߢ޽ࠆ゠㆏਄ߢߒ߆⏕⹺ߢ߈ߥ޿ᛛⴚ⊛ߥ⺖㗴ߪ㧘Ԙᄢ᳇ᛶ᛫ࠍ⵬ఘߒߚ゠㆏଻ᜬ㧘ԙ

ේሶ⁁㉄⚛ߩᓇ㗀ᛠី㧘Ԛᆫ൓቟ቯᐲߩ⏕⹺ߢߔ㧚

࿑㧞㧚⿥ૐ㜞ᐲⴡᤊᛛⴚ⹜㛎ᯏ(SLATS)⸘↹

10

SLATSߢߪ㧘ࡠࠤ࠶࠻ᛩ౉゠㆏߆ࠄ㗅ᰴ㜞ᐲࠍਅߍ㧘ᦨ⚳⊛ߦߪ180kmߩ㜞ᐲߢ3ࡩ᦬㑆Ԙᄢ᳇ᛶ᛫ࠍ⵬

ఘߒߚ゠㆏଻ᜬ㧘ԙේሶ⁁㉄⚛ߩᓇ㗀ᛠី㧘Ԛᆫ൓቟ቯᐲߩ⏕⹺ࠍⴕ߁⸘↹ߢߔ㧚

࿑㧟㧚⿥ૐ㜞ᐲⴡᤊᛛⴚ⹜㛎ᯏ(SLATS)ߩታ㛎⸘↹

3. ᦝߥࠆ㔚᳇ផㅴߩน⢻ᕈߦߟ޿ߡ

ߘ߽ߘ߽㧘ߎࠇ߹ߢߩⴡᤊ೑↪ߦ߅޿ߡߪ㧘㕒ᱛ࠻࡜ࡦࠬࡈࠔ゠㆏߆ࠄ㕒ᱛ゠㆏߳ߩ゠㆏ᄌ឵߿᦬࡮ᖺᤊតᩏ ᯏߩ゠㆏ᄌ឵ߩߚ߼ߦផㅴജࠍ᦭ߒߡ߅ࠅ߹ߔ㧚ߎߩ↪ㅜߦ߅޿ߡ㧘ᦝߦ㧘㔚᳇ផㅴߩ᦭ߔࠆ㜞Ყផജߣ޿߁․

ᓽࠍᵴ߆ߒߡᛂߜ਄ߍ⾰㊂ࠍૐᷫߔࠆߎߣࠍ⋡ᜰߒߡ㧘㔚᳇ផㅴߦࠃࠆ゠㆏ᄌ឵㨇㧞㨉ߦߟ޿ߡ㧘ᬌ⸛߇ㅴ߼ࠄ ࠇߡ޿߹ߔ㧚

ᧄⓂߢ⚫੺ߒ߹ߒߚ⿥ૐ㜞ᐲⴡᤊߢߪ㧘ⓨ᳇ᛶ᛫ߩ⵬ఘߩߚ߼ߦ㔚᳇ផㅴࠍ૶↪ߒߡ޿߹ߔ߇㧘ߎࠇߪ㧘࿾⃿

๟࿁ߩⴡᤊ߇ផㅴജࠍᜬߜ㧘ࡠࠤ࠶࠻ߢᛩ౉ߐࠇߚ゠㆏߆ࠄ⥄↱ߦߥࠆߎߣߢ߽޽ࠅ߹ߔ㧚ᛩ౉゠㆏߆ࠄ⥄↱ߦ ߥࠆᛛⴚߪ㧘ⴡᤊ೑↪ࠍᦝߦㅴ߼ࠆน⢻ᕈࠍ᦭ߒߡ޿ࠆߣ⠨߃ߡ޿߹ߔ㧚଀߃߫㧘ⶄᢙⴡᤊߩࠦࡦࠬ࠲࡟࡯࡚ࠪ

ࡦࠍ⚵߻႐วߦ৻ᐲߩᛂߜ਄ߍߢⶄᢙᯏࠍᛂߜ਄ߍ㧘ⴡᤊ⥄ࠄ߇゠㆏ࠍᄌ឵ߒࠦࡦࠬ࠲࡟࡯࡚ࠪࡦࠍ⚵߻ߎߣ߇

಴᧪ࠆߣ㧘ᛂߜ਄ߍ⚻⾌ߩૐᷫ߇ߢ߈㧘ⴡᤊࠍᦝߦりㄭߦߔࠆน⢻ᕈ߇޽ࠅ߹ߔ㧚߹ߚ㧘ⴡᤊߩ゠㆏૏⟎ࠍᏱߦ ᄌ឵ߒ㧘ห৻⚻ᐲ਄ߦ⇐߹ࠆߎߣ߇น⢻ߦߥࠇ߫㧘ᣂߒ޿ⴡᤊ೑↪ߩ㆏߇㐿߆ࠇࠆ߽ߩߣ⠨߃߹ߔ㧚

ෳ⠨ᢥ₂

[1] NODA㧘HOMMA㧘UTASHIMA㧘“ The Study of a Super Low Altitude Satellite”㧘ISTS2008-f-5㧘2008 [2] 㐳㊁㪃“䉥䊷䊦㔚ൻផㅴ♽䈱㕒ᱛⴡᤊ䉲䉴䊁䊛㩿㪉㪀㪄ⴡᤊ䉲䉴䊁䊛ᬌ⸛㪄”㪃㩷 ╙ 㪌㪇 ࿁ቝ⑼ㅪ㪃㪉㪇㪇㪍㪅㪈㪈㩷

By Susumu Sasaki*

Abstractɪ Solar Power Satellite (SPS) will be a large-scale clean energy system to resolve the

“global energy and environmental problems”, by replacing the fossil energy plants in the future. This report describes the performance and cost target for the orbit transfer vehicle required for SPS construction based on the latest SPS model.

Key wordsɪSolar power satellite, Orbit transfer vehicle

1.

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12

2. SPS

2.1. SPS

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⒖േ

⒖േ

⒖േ䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯 ᜂᒰᜂᒰᜂᒰᜂᒰ7%'

ዬ૑

ዬ૑

ዬ૑

ዬ૑䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯 ᜂᒰᜂᒰᜂᒰᜂᒰ7%'

⾗Ḯ೑↪ⵝ⟎

⾗Ḯ೑↪ⵝ⟎

⾗Ḯ೑↪ⵝ⟎

⾗Ḯ೑↪ⵝ⟎

ᜂᒰᜂᒰᜂᒰᜂᒰ7%' ㅢାⴡᤊ

ㅢାⴡᤊ ㅢାⴡᤊ ㅢାⴡᤊ

᦭ੱ⌕㒽

᦭ੱ⌕㒽

᦭ੱ⌕㒽

᦭ੱ⌕㒽䋯䋯䋯䋯਄᣹⦁਄᣹⦁਄᣹⦁਄᣹⦁

⽻‛

⽻‛⽻‛

⽻‛⌕㒽⌕㒽⌕㒽䊶⌕㒽䊶䊶䊶࿁෼ᯏ࿁෼ᯏ࿁෼ᯏ࿁෼ᯏ

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

⽻‛⽻‛

⽻‛⽻‛ᛂᛂᛂᛂ

਄ᯏ

਄ᯏ

਄ᯏ

਄ᯏ

☨࿖ᄖャㅍ䊶ㅢା䍚䍛䍡䍯

᦭ੱ

᦭ੱ

᦭ੱ

᦭ੱᛂ਄ᯏᛂ਄ᯏᛂ਄ᯏᛂ਄ᯏ

゠㆏㑆ャㅍᯏ

゠㆏㑆ャㅍᯏ゠㆏㑆ャㅍᯏ

゠㆏㑆ャㅍᯏ ㅢାⴡᤊㅢାⴡᤊㅢାⴡᤊㅢାⴡᤊ

᦬ૐ゠㆏

᦬ૐ゠㆏

᦬ૐ゠㆏

᦬ૐ゠㆏䍙䍎䍩䍙䍎䍩䍙䍎䍩䍙䍎䍩䍼䍼䍼䍼䍛䍛䍛䍛 䍱䍚

䍱䍚 䍱䍚 䍱䍚䍼䍼䍼䍼䍋䍎䍷䍋䍎䍷䍋䍎䍷䍋䍎䍷

࿖㓙᦬㕙ၮ࿾

࿖㓙᦬㕙ၮ࿾

࿖㓙᦬㕙ၮ࿾

࿖㓙᦬㕙ၮ࿾

$5(6䍚䍶䍎䍛䍚䍶䍎䍛䍚䍶䍎䍛䍼䍼䍼䍼䍚䍶䍎䍛

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

䍓䍵䍐䍓䍻䍓䍵䍐䍓䍻䍓䍵䍐䍓䍻䍓䍵䍐䍓䍻

᦭ੱ⌕㒽

᦭ੱ⌕㒽

᦭ੱ⌕㒽

᦭ੱ⌕㒽䋯䋯䋯䋯਄᣹⦁਄᣹⦁਄᣹⦁਄᣹⦁

☨࿖ャㅍ䊶ㅢା䍚䍛䍡䍯

តᩏ↪

តᩏ↪តᩏ↪

តᩏ↪䊨䊷䊋䊨䊷䊋䊨䊷䊋䊨䊷䊋 䋫䋫䋫

䋫ቝቮ᦯ቝቮ᦯ቝቮ᦯ቝቮ᦯

☨࿖ቝቮ᦯

☨࿖ቝቮ᦯☨࿖ቝቮ᦯

☨࿖ቝቮ᦯

㔚Ḯ 㔚Ḯ㔚Ḯ 㔚Ḯ䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯 ᜂᒰᜂᒰᜂᒰ7%'ᜂᒰ

⒖േ

⒖േ

⒖േ

⒖േ䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯 ᜂᒰᜂᒰᜂᒰᜂᒰ7%'

ዬ૑

ዬ૑

ዬ૑

ዬ૑䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯䍚䍛䍡䍯 ᜂᒰᜂᒰᜂᒰᜂᒰ7%'

⾗Ḯ೑↪ⵝ⟎

⾗Ḯ೑↪ⵝ⟎

⾗Ḯ೑↪ⵝ⟎

⾗Ḯ೑↪ⵝ⟎

ᜂᒰᜂᒰᜂᒰᜂᒰ7%' ㅢାⴡᤊ

ㅢାⴡᤊ ㅢାⴡᤊ ㅢାⴡᤊ

᦭ੱ⌕㒽

᦭ੱ⌕㒽

᦭ੱ⌕㒽

᦭ੱ⌕㒽䋯䋯䋯䋯਄᣹⦁਄᣹⦁਄᣹⦁਄᣹⦁

⽻‛

⽻‛⽻‛

⽻‛⌕㒽⌕㒽⌕㒽䊶⌕㒽䊶䊶䊶࿁෼ᯏ࿁෼ᯏ࿁෼ᯏ࿁෼ᯏ

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

᦭ੱቝቮ⦁

⽻‛⽻‛

⽻‛⽻‛ᛂᛂᛂᛂ

਄ᯏ

਄ᯏ

਄ᯏ

਄ᯏ

☨࿖ᄖャㅍ䊶ㅢା䍚䍛䍡䍯

᦭ੱ

᦭ੱ

᦭ੱ

᦭ੱᛂ਄ᯏᛂ਄ᯏᛂ਄ᯏᛂ਄ᯏ

゠㆏㑆ャㅍᯏ

゠㆏㑆ャㅍᯏ゠㆏㑆ャㅍᯏ

゠㆏㑆ャㅍᯏ ㅢାⴡᤊㅢାⴡᤊㅢାⴡᤊㅢାⴡᤊ

᦬ૐ゠㆏

᦬ૐ゠㆏

᦬ૐ゠㆏

᦬ૐ゠㆏䍙䍎䍩䍙䍎䍩䍙䍎䍩䍙䍎䍩䍼䍼䍼䍼䍛䍛䍛䍛 䍱䍚

䍱䍚 䍱䍚 䍱䍚䍼䍼䍼䍼䍋䍎䍷䍋䍎䍷䍋䍎䍷䍋䍎䍷

࿖㓙᦬㕙ၮ࿾

࿖㓙᦬㕙ၮ࿾

࿖㓙᦬㕙ၮ࿾

࿖㓙᦬㕙ၮ࿾

࿑㧠 ᣣᧄߩ዁᧪᦭ੱቝቮᵴേ᭴ᗐឭ᩺

࿖㓙࿖㓙࿖㓙࿖㓙᦭ੱ᦬᦭ੱ᦬᦭ੱ᦬᦭ੱ᦬᜚ὐ᜚ὐ᜚ὐ⸘↹᜚ὐ⸘↹⸘↹ߢߩ⸘↹ߢߩߢߩ㔚᳇ផㅴߢߩ㔚᳇ផㅴ㔚᳇ផㅴᵴ↪㔚᳇ផㅴᵴ↪ᵴ↪ᵴ↪ߩߩߩߩน⢻ᕈน⢻ᕈน⢻ᕈน⢻ᕈ

┨ߢㅀߴߚࠃ߁ߦޔᣣᧄߩ࿖㓙᦭ੱ᦬᜚ὐ⸘↹߳ߩ⽸₂ߩ৻ߟߩࠝࡊ࡚ࠪࡦߣߒߡ⽻‛ャㅍߢ⽸₂ߔࠆߎߣ ߇⠨߃ࠄࠇࠆޕߎߩ⽻‛ャㅍߪ 5'.'0' ⸘↹ߦࠃࠅ⌕㒽ᛛⴚࠍ₪ᓧߔࠆߎߣߢᣣᧄߩᄢ߈ߥࠕ࠼ࡃࡦ࠹࡯ࠫ߇಴

ߡߊࠆಽ㊁ߢ߽޽ࠆޕ߹ߚޔャㅍᛛⴚ⥄૕߇᦭ੱޔήੱߩ⥄┙⊛តᩏߦᄢ߈ߊነਈߔࠆ߽ߩߢ߽޽ࠆޕ

ߐߡޔߘߩ⽻‛ャㅍߣߒߡߪൻቇ⊛ߥផㅴᛛⴚߦࠃࠆᣇᴺ߽ᒰὼߥ߇ࠄ⠨߃ࠄࠇࠆ߇ޔᣣᧄߩᓧᗧᛛⴚߩ৻ߟ ߢ߽޽ࠆ㔚᳇ផㅴᛛⴚ߇ㆡ↪ߢ߈ࠆ߆ߤ߁߆ߦߟ޿ߡߪ৻ߟߩᬌ⸛ߔߴ߈⺖㗴ߢ޽ࠆߣ޿߃ࠆޕߥ߅ޔ㔚᳇ផㅴ ߪၮᧄ⊛ߦផജ߇ᓸᒙߢ޽ࠆߚ߼ޔ᦬㕙⌕㒽ߥߤߩᄢផജ߇ᔅⷐߥ႐㕙ߢߪߥߊޔ࿾⃿ૐ゠㆏߆ࠄ᦬ૐ゠㆏.QY .WPCT1TDKV..1߳ߩ゠㆏ㆫ⒖߳ߩㆡ↪ߣߥࠆޕ

ߣߎࠈߢޔ᦬㕙᜚ὐ⸘↹ߦ߅޿ߡ ..1 ߳ャㅍߔߴ߈߽ߩߣߒߡߪޔ࿑㧡ߩࠃ߁ߦᢛℂߔࠆߎߣ߇ߢ߈ࠆޕᤨ㑆

⊛ߥ೙⚂߆ࠄ᦭ੱቝቮ⦁ߦኻߒߡߪㆡ↪ߪ㔍ߒ޿߇ޔߘࠇએᄖߦߟ޿ߡߪᤨ㑆⊛೙⚂߇޽߹ࠅߥ޿ߚ߼ㆡ↪ߩน

⢻ᕈ߇޽ࠆޕߎߎߢߪޔઍ⴫଀ߣߒߡ᦭ੱ᦬⌕㒽⦁ߣ⽻‛⌕㒽⦁ߦߟ޿ߡ⠨ኤߒߡߺࠆޕ

᦭ੱ᦬⌕㒽⦁᦭ੱ᦬⌕㒽⦁ߩ᦭ੱ᦬⌕㒽⦁᦭ੱ᦬⌕㒽⦁ߩߩߩ㔚᳇ផㅴ㔚᳇ផㅴ㔚᳇ផㅴߦࠃࠆ㔚᳇ផㅴߦࠃࠆߦࠃࠆߦࠃࠆ//2߳ߩ߳ߩ߳ߩ߳ߩャㅍャㅍャㅍャㅍน⢻ᕈᬌ⸛น⢻ᕈᬌ⸛น⢻ᕈᬌ⸛น⢻ᕈᬌ⸛

᦭ੱ᦬⌕㒽⦁ߩⷙᮨߣߒߡߪࠕࡐࡠ᦬⌕㒽⦁ࠢ࡜ࠬߩ V ࠍᗐቯߔࠆޕߎࠇߪ *++ ߩჇᒝဳߢ MO:MO ߩᬦ౞゠㆏ߦᛂ਄ߍน⢻ߥᦨᄢ⾰㊂ߢ޽ࠆޕ㔚᳇ផㅴߦߪ゠㆏਄ߢᄢ㔚ജࠍᔅⷐߣߔࠆߚ߼ᄥ㓁㔚ᳰࡄࡀ࡞ߢߩ

⊒㔚ࠍ⠨߃ߚ႐วߦ࿾⃿ߩᓇߩᓇ㗀߇ዋߥ޿ᬦ౞゠㆏ߦਸ਼ߖߡ߅ߊᔅⷐ߇޽ࠅޔ਄⸥ߩࠃ߁ߥ゠㆏ࠍㆬᛯߒߡ޿

ࠆޕߚߛߒޔ㔌ᔃ₸ߪᄥ㓁శ⊒㔚ߩല₸ࠍ⠨߃ࠆߣࠃࠅᄢ߈޿ᣇ߇ᦸ߹ߒ޿ޕ⌕㒽⦁ߩߺߢ V ߢ޽ࠆߚ߼ޔ㔚

᳇ផㅴࡕࠫࡘ࡯࡞㧔ߎࠇ߽ห╬ߩ V㧕ࠍ೎ㅜᛂߜ਄ߍߡ゠㆏਄ߢ࠼࠶ࠠࡦࠣߐߖޔߘߩᓟޔ㔚᳇ផㅴߦࠃࠅ ..1 ߦャㅍߔࠆޕ࿑㧢ߦߘߩャㅍߩ᭎ⷐ࿑ࠍ␜ߔޕ

ߎߎߢޔ㔚᳇ផㅴࠬ࡜ࠬ࠲ߣߒߡ⃻⁁ᛛⴚߢߩផജᦨᄢ⚖ࠢ࡜ࠬߢ޽ࠆࡎ࡯࡞ࠬ࡜ࠬ࠲㧔O0ޔM9ޔMI㧕 ࠍࡌ࡯ࠬߦᬌ⸛ࠍ⹜ߺߚޕ

゠㆏ㆫ⒖ߪ 4GUQPCPEG%CRVWTG ߣ޿߁゠㆏ㆫ⒖ᣇᑼࠍߣࠆߎߣߣߒޔ゠㆏ㆫ⒖ᤨ㑆ࠍ⠨ᘦߒߡ⾰㊂ V ߦߟ߈ផ ജ 0 ࠍ⋡቟ߣߒߚޕߎߩ႐วߩ゠㆏ㆫ⒖ᤨ㑆ߪ ᣣޕ

ᧄࠤ࡯ࠬߢߪ✚⾰㊂ V ߢ޽ࠆߩߢޔផജߣߒߡߪ⚂ 0 ߇ᔅⷐߢ޽ࠅޔO0 ߩࡎ࡯࡞ࠬ࡜ࠬ࠲ߪ ୘ᔅⷐ ߣߥࠆޕߚߛߒޔ੍஻ߣߒߡ ୘ㅊടߒޔว⸘ ୘ߣߔࠆޕว⸘ V ߹ߚޔᔅⷐჇㅦ㊂OUGEߣឃ᳇

ㅦᐲ߆ࠄᔅⷐផ⮎㊂ߪ V ߣ⸘▚ߐࠇࠆޕో஻⾰㊂ V ߆ࠄߎࠇࠄࠍ㒰ߊߣ V ߣߥࠆޕ৻ᣇޔᔅⷐ㔚ജ㊂ߪ M9˜㧩M9 ߣߥࠅޔઁߩࠪࠬ࠹ࡓ⾰㊂߽฽߼ߡ V ߢߩߎߩ㔚ജ㆐ᚑߪ߆ߥࠅࡂ࡯࠼࡞ߪ㜞޿ޕ

⽻‛᦬⌕㒽⦁⽻‛᦬⌕㒽⦁ߩ⽻‛᦬⌕㒽⦁⽻‛᦬⌕㒽⦁ߩߩߩ㔚᳇ផㅴ㔚᳇ផㅴ㔚᳇ផㅴߦࠃࠆ㔚᳇ផㅴߦࠃࠆߦࠃࠆߦࠃࠆ//2߳ߩ߳ߩ߳ߩ߳ߩャㅍャㅍャㅍャㅍน⢻ᕈน⢻ᕈน⢻ᕈᬌ⸛น⢻ᕈᬌ⸛ᬌ⸛ᬌ⸛

ᰴߦޔ⽻‛᦬⌕㒽⦁ߦߟ޿ߡߩ଀ࠍ⠨ኤߔࠆޕ೨ឭߣߒߡ+,,%ߦࠃࠆ࿁ᛂ਄ߍߢ*72ᛩ౉ߣߔࠆޕߎࠇ ߦࠃࠅೋᦼ⾰㊂ߪWߣߥࠆޕ࿑㧣ߦߎߩャㅍࠤ࡯ࠬߩ᭎ⷐࠍ␜ߔޕߥ߅ޔߎߩ೨ឭߦߟ޿ߡߪᄌᦝߩ૛࿾߇޽

ࠅޔ*72ࠃࠅ߽ૐ޿゠㆏ࠍขࠆߎߣ߽น⢻ߢ޽ࠆߒޔ᦭ੱ᦬⌕㒽⦁ߩ႐วߣห᭽ߦ+,,%Ⴧᒝဳߣߔࠆߎߣ߽

ߢ߈ࠆߢ޽ࠈ߁ޕ

ߐߡޔߎߩ႐วߦ߽㗄ߣห᭽ߥ⸘▚ࠍߔࠆߣޔャㅍน⢻ߥࡍࠗࡠ࡯࠼㧗ࡃࠬ⾰㊂ߪWߣߥࠆޕ৻ᣇޔᔅ ⷐߥ㔚ജ㊂ߪN:ߢ޽ࠅ㔚ജࠪࠬ࠹ࡓߩᮡḰ⊛ߥ㔚ജኒᐲ:NJߢ⠨߃ࠆߣ㔚ജࠪࠬ࠹ࡓߩ⾰㊂ߪNJ

⒟ᐲߣߥࠆޕߒߚ߇ߞߡޔ㔚ജࠪࠬ࠹ࡓࠍ㒰޿ߚࡍࠗࡠ࡯࠼㧗ࡃࠬ⾰㊂ߪWߣߥࠆޕߎࠇߦኻߒޔൻቇផㅴߩ ႐ว㧔6WRUDEOH㧧,VSVޔ⋥ធ/72ᛩ౉㧕ߩߘࠇߪW⒟ᐲߢ޽ࠅޔ㔚᳇ផㅴߩ႐วߩᣇ߇Wᒙߩࡔ࡝࠶࠻

߇޽ࠆߣ޿߃ࠆޕ

22

䋱䋮᦭ੱቝቮ⦁ ^{//2䈪䈱⾰㊂䊃䊮}

ᤨ㑆⊛೙⚂᦭䉍

䋲䋮᦭ੱ᦬⌕㒽⦁

//2䈪䈱⾰㊂䊃䊮

ᤨ㑆⊛೙⚂䈲䈭䈚

䋳䋮⽻‛↪᦬⌕㒽⦁

//2䈪䈱⾰㊂䊃䊮

ᤨ㑆⊛೙⚂䈲䈭䈚

䋴䋮ㅢା䊶⥶ᴺⴡᤊ

//2䈪䈱⾰㊂䊃䊮

ᤨ㑆⊛೙⚂䈲䈭䈚

㔚᳇ផㅴ䈱ㆡ↪

㬍

㔚᳇ផㅴ䈱ㆡ↪

䂦

㔚᳇ផㅴ䈱ㆡ↪

䂦

㔚᳇ផㅴ䈱ㆡ↪

䂾

䋱䋮᦭ੱቝቮ⦁ ^{//2䈪䈱⾰㊂䊃䊮}

ᤨ㑆⊛೙⚂᦭䉍

䋲䋮᦭ੱ᦬⌕㒽⦁

//2䈪䈱⾰㊂䊃䊮

ᤨ㑆⊛೙⚂䈲䈭䈚

䋳䋮⽻‛↪᦬⌕㒽⦁

//2䈪䈱⾰㊂䊃䊮

ᤨ㑆⊛೙⚂䈲䈭䈚

䋴䋮ㅢା䊶⥶ᴺⴡᤊ

//2䈪䈱⾰㊂䊃䊮

ᤨ㑆⊛೙⚂䈲䈭䈚

㔚᳇ផㅴ䈱ㆡ↪

㬍

㔚᳇ផㅴ䈱ㆡ↪

䂦

㔚᳇ផㅴ䈱ㆡ↪

䂦

㔚᳇ផㅴ䈱ㆡ↪

䂾

࿑㧡 ࿖㓙᦭ੱ᜚ὐ⸘↹ߢߩ//2߳ߩャㅍࠕࠗ࠹ࡓ଀

(376

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᦭ੱ᦬⌕㒽⦁ W

㔚᳇ផㅴ゠㆏ㆫ⒖䉲䉴䊁䊛 W

᦬ㆫ⒖゠㆏᦬౒㡆䉨䊞䊒䉼䊞゠㆏

᦬⌕㒽

᦬ᭂ゠㆏

NP

᦬ㆫ⒖゠㆏ᛩ౉

3 ( 76

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/(2W⚖⚖⚖⚖

᦭ੱ᦬⌕㒽⦁ W

㔚᳇ផㅴ゠㆏ㆫ⒖䉲䉴䊁䊛 W

᦬ㆫ⒖゠㆏᦬౒㡆䉨䊞䊒䉼䊞゠㆏

᦬⌕㒽

᦬ᭂ゠㆏

NP

᦬ㆫ⒖゠㆏ᛩ౉

3 ( 76

᦬ㆫ⒖゠㆏᦬౒㡆䉨䊞䊒䉼䊞゠㆏

᦬⌕㒽

᦬ᭂ゠㆏

NP

᦬ㆫ⒖゠㆏ᛩ౉

3 ( 76

᦬ㆫ⒖゠㆏᦬౒㡆䉨䊞䊒䉼䊞゠㆏

᦬⌕㒽

᦬ᭂ゠㆏

NP

᦬ㆫ⒖゠㆏ᛩ౉

3 ( 76

(3 76

࿑㧢 㔚᳇ផㅴߦࠃࠆ᦭ੱ᦬⌕㒽⦁ャㅍ᩺

*72゠㆏゠㆏゠㆏゠㆏

㬍㬍㬍NP㬍

᦬ㆫ⒖゠㆏᦬౒㡆䉨䊞䊒䉼䊞゠㆏

᦬⌕㒽

*72ᛩ౉ ᦬ᭂ゠㆏

NP

᦬ㆫ⒖゠㆏ᛩ౉ +,,

*72W⚖⚖⚖⚖

⽻‛᦬⌕㒽⦁W

(3 76

3 ( 67

(3 76

(376

*72゠㆏゠㆏゠㆏゠㆏

㬍㬍㬍NP㬍

᦬ㆫ⒖゠㆏᦬౒㡆䉨䊞䊒䉼䊞゠㆏

᦬⌕㒽

*72ᛩ౉ ᦬ᭂ゠㆏

NP

᦬ㆫ⒖゠㆏ᛩ౉ +,,

*72W⚖⚖⚖⚖

⽻‛᦬⌕㒽⦁W

(3 76

3 ( 67

(3 76

(376 (376

࿑㧣 㔚᳇ផㅴߦࠃࠆ⽻‛᦬⌕㒽⦁ャㅍ᩺

߹ߣ߼߹ߣ߼߹ߣ߼߹ߣ߼

xࡐࠬ࠻ +55 ࡊࡠࠣ࡜ࡓߣߒߡ࿖㓙᦭ੱ᦬᜚ὐ⸘↹߇⢝േߒᆎ߼ߡ޿ࠆޕ

x࿖㓙᦭ੱ᦬᜚ὐ⸘↹ߦ߅޿ߡ߽ +55 ߣห᭽ߦࡠࡃࠬ࠻ߢല₸⊛ߥ៞ਸ਼ຬ࡮‛⾗ャㅍ߇ⷐ᳞ߐࠇࠆߣ⠨߃ࠄ ࠇࠆޕ

x᦭ੱቝቮ⦁એᄖߪޔ㔚᳇ផㅴߦࠃࠆャㅍߩน⢻ᕈ߇޽ࠆޕ

xᢙ࠻ࡦ⒟ᐲߩ᦬㕙߳ߩ⽻‛ャㅍߢߪൻቇផㅴࠃࠅ߽㔚᳇ផㅴߩ߶߁߇㜞ല₸ߩャㅍ߇ᦼᓙߢ߈ࠆޕ

20cm

ࡑࠗࠢࡠᵄ᡼㔚ᑼࠗࠝࡦࠛࡦࠫࡦ

⷏ጊ ๺ቁ*

20-cm Diameter Microwave Discharge Ion Engine

By

Kazutaka NISHIYAMA*

Abstract: In order to advance the technology of electron cyclotron resonance (ECR) microwave discharge ion thrusters known as the “—(mu)” family, we have been developing a 20-cm diameter thruster —20 after successful development and flight experiences of an asteroid explorer “Hayabusa” employing four 10-cm diameter thrusters —10. In contrast to the —10 whose ion beam current was saturated to 150 mA at higher microwave powers than 30 W, the

—20 can generate 500 mA ion beam current with 100 W microwave power and 1100 – 1300 V acceleration voltage, yielding beam ion production cost (discharge power per unit beam current) of 200 W/A and thrust of 27 mN thanks to enlargement of the discharge chamber and moderate plasma density below cutoff. The —20 will be applied to deep space missions with larger delta-v and more massive spacecraft than Hayabusa.

Key words㧦Microwave Discharge, Electron Cyclotron Resonance, Ion Engine

1.1. ߪߓ߼ߦ

ᚒޘߪޟߪ߿߱ߐޠએ㒠ߩߐࠄߦᄢⷙᮨߥዊᄤ૕តᩏᯏ߳ߩㆡ↪ࠍᗐቯߒߡ㧘ޟߪ߿߱ߐޠ៞タࠗࠝࡦࠛࡦࠫ

ࡦȝ10ߩࡆ࡯ࡓญᓘࠍ2୚ߦߒߚȝ20ߩ㐿⊒ࠍ2000ᐕ߆ࠄⴕߞߡ߈ߚ㧚ߎߩȝ20ߪ⋥ᓘ20 cm㧘ᷓߐ3 cmߩᭂ

߼ߡ⭯ဳߩࡈ࡜࠶࠻ߥ᡼㔚ቶౝㇱߦ㧘㔚ሶࠨࠗࠢࡠ࠻ࡠࡦ౒㡆(ECR)᡼㔚ࠍ๟ᵄᢙ4.25 GHzߩࡑࠗࠢࡠᵄࠍ↪޿

ߡ⿠ߎߒ㧘㕒㔚ടㅦߦㆡߒߚኒᐲߩࠠ࠮ࡁࡦࡊ࡜࠭ࡑࠍ↢ᚑߔࠆ㧚⴫1ߦȝ20ߩ⋡ᮡᕈ⢻ߣߎࠇ߹ߢߦ㆐ᚑߒߚ ᕈ⢻ߣࠍ␜ߔ㧚⏛᳇࿁〝߿ࠟࠬଏ⛎ᣇᴺߩᎿᄦߦࠃࠅ㧘⋡ᮡߣߔࠆ500 mAߩࠗࠝࡦࡆ࡯ࡓ↢ᚑࠍ100 Wએਅߩ ࡑࠗࠢࡠᵄ㔚ജߢታ⃻ߔࠆߣ޿߁⋡ᮡߪᣧᦼߦ㆐ᚑߐࠇߚ㧚ߒ߆ߒ㧘ߘߩߚ߼ߦᔅⷐߥࠠ࠮ࡁࡦࠟࠬߩᵹ㊂߇

10 – 11 SCCMߣ㜞޿ߚ߼㧘ផㅴ೷೑↪ല₸߇70 %એਅߦߣߤ߹ߞߡ߅ࠅ㧘ߎߩὐ߇ᦨᓟߩⷐ⺞ᢛ㗄⋡ߢ޽ߞߚ

߇㧚ࡊ࡜࠭ࡑኒᐲಽᏓߦวࠊߖߡሹᓘࠍ❗ዊߒߚࠕࠢ࠮࡞ࠣ࡝࠶࠼ߦࠃࠅᡷༀߢ߈ߚ㧚2008ᐕᤨὐߢߪ㧘㜞࿶

⛘✼⎕უ㗫ᐲࠍᭂജᛥ߃ߚ቟ቯᕈ㊀ⷞߩ㔚ᭂ㑆㓒⸳ቯߢ㐳ᤨ㑆ㆇォࠍ㐿ᆎߒߡ޿ࠆ߇㧘ផㅴ೷೑↪ല₸ߪ74 % ߣ⸵ኈน⢻ߥ୯ߦߥߞߡ޿ࠆ㧚

ߎߩȝ20ࠗࠝࡦࠛࡦࠫࡦߩ៞タࠍᗐቯߒߚㄭ޿዁᧪ߩࡒ࠶࡚ࠪࡦߣߒߡ㧘⴫2ߦឝߍࠆዊᖺᤊតᩏᯏޟࡑ࡞

ࠦ࡮ࡐ࡯ࡠޠߣ㤛㆏㕙⣕಴ဳᄥ㓁᷹ⷰⴡᤊޟSolar-Cޠߩੑߟ߇ᬌ⸛ߐࠇߡ޿ࠆ㧚߹ߛ᭎ᔨᬌ⸛Ბ㓏ߩߚ߼㧘޿ߕ ࠇߩᖱႎ߽⏕ቯ⊛ߥ߽ߩߢߪߥ޿߇㧘ᄢ߈ߥ࠻࡯࠲࡞ࠗࡦࡄ࡞ࠬ߇ᔅⷐߣߐࠇࠆߎߣߪ㑆㆑޿ߥ޿㧚Solar-Cߢ ߪ㧘⃻࿷ዊᖺᤊࡌࠬ࠲ߦะ߆ߞߡ㘧ⴕਛߩDawnតᩏᯏߩ425 kgߦߖ߹ࠆࠠ࠮ࡁࡦ៞タ㊂߇ⷐ᳞ߐࠇߡ޿ࠆ㧚 ȝ20ߩࡆ࡯ࡓ㔚ᵹኒᐲߪȝ10ߩߘࠇߣห⒟ᐲߢ޽ࠆߚ߼㧘20000ᤨ㑆ߦ෸߱࿾਄⠴ਭ⹜㛎ߢߩȝ10ࠕࠢ࠮࡞ࠣ࡝

࠶࠼៊⠻⁁ᴫ߆ࠄߩ㘃ផߢȝ20ߢ߽ࠣ࡝࠶࠼ߩ25000ᤨ㑆ߩ⠴ਭᕈߪචಽ⏕଻ߢ߈ࠆߣ⠨߃ࠄࠇࠆ㧚ߐࠄߦ࡝ࠬ

ࠢࠍૐᷫߔࠆߚ߼㧘ࠕࠢ࠮࡞㔚࿶ߩᄢ߈ߐߩૐᷫߦദ߼ߡ߈ߡ߅ࠅ㧘ᓥ᧪ߩȝ10ߣหߓߢ޽ߞߚ-350 V߆ࠄ-150 Vߦᄌᦝߒߡ޿ࠆ㧚ࠗࠝࡦⴣ᠄ߦࠃࠆࠬࡄ࠶࠲࡝ࡦࠣ₸߇ඨಽએਅߦᷫዋߔࠆߎߣ߆ࠄ㧘ࠣ࡝࠶࠼ߩᑧ๮ലᨐ߇ 㕖Ᏹߦᄢ߈޿ߣᦼᓙߐࠇࠆ㧚

㧖 JAXA Space Exploration Center (JSPEC) /JAXA