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Magnetoresistance and space

Explore the importance of magnetoresistance in space technology through small satellite instruments for attitude control and space plasma physics. Discover the challenges and advancements in sensor patterning and optimization. Learn about future projects and next-generation capabilities.

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Magnetoresistance and space

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  1. Magnetoresistance and space Anders Persson Ångström Space Technology Centre

  2. Why magnetism and space? • Jan Bergman • Very common satellite instrument • Attitude control • Space plasma physics 0,79 g 2 kg

  3. Why small? • The Space Shuttle ~74 ton • A launch required • 2000 ton of fuel • 2.9 billion SEK • A nanosatellite weighs <10 kg • A launch requires • 50 000-100 000 SEK/kg • Piggy-back launches possible

  4. How small? • 1 nm = 0,000000001 m • 1 atom ≈ 0,1-0,2 nm 1 nm 87 nm

  5. How small is small? • 1 µm = 1000 nm • Ø human hair ≈ 100 µm Kreussenglas-kryssningsrobot

  6. How is it done? ESCA Pattern the sensors FIB Isolation Contacts

  7. Why is it difficult? • Patterning the sensors Redeposition Implantation

  8. How did it go? • Implantation • A study of the effects • Optimization of the process • Redeposition • Stop the etch in the barrier • 5-10 ggr more signal • Radiation • Equivalent to a Jupiter mission • No effects at all!

  9. What’s next? • Vietnamese satellite F-1 • Weighs 1 kg • Launch during, 2012

  10. …and also • Planar Hall effect senors • New type of sensor geometry • A complement at low frequencies 60 nm

  11. Promising performance Scalability Detection limit Sensitivity

  12. The next generation • New optimized design • 100 pTHz-0.5 @ 0.1 Hz • 30 pTHz-0.5 @ f>10 Hz

  13. Tack!

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