How to Ride a Laser Beam

How to Ride a Laser Beam

This is a talk I gave at the Harvard-Smithsonian Center for Astrophysics for the Institute for Theory and Computation (ITC) Luncheon. A video of the talk is available here: https://youtu.be/A229uFsQ73g?t=50m55s

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Zac Manchester

January 26, 2017
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Transcript

  1. Zac  Manchester Harvard  SEAS How  to  Ride  a  Laser  Beam

  2. 2 Starshot

  3. ! Beam Sail " 3 Sail  Dynamics F = Z

    S 2 P( x ) ˆ b · ˆ n ( x ) c ˆ n ( x ) dS ⌧ = Z S 2 P( x ) ˆ b · ˆ n ( x ) c r ( x ) ⇥ ˆ n ( x ) dS m¨ x = F I ˙ ! + ! ⇥ I! = ⌧
  4. ! " ≈ −%& ! 4 “Beam  Riding”  Stability Re

    ⇢ eig ✓ @f? @ x x ⇤ ◆ < 0 ˙ x = f?( x ⇤) = 0
  5. 5 Conical  Sails  on  Gaussian  Beams ! ω# $ %

    & ' ( )
  6. 6 Non-­‐Spinning  Case

  7. 7 Pendulum  Sail? !" #

  8. 8 Spinning  Case ω "

  9. 9 Spherical  Sail ! " # $

  10. 10 Beam  Profile

  11. 11 Potential  Function

  12. 12 Simulations

  13. zmanchester@seas.harvard.edu Questions?