title: Coherent slowing of a supersonic beam with an atomic paddle.
abstract: We report the slowing of a supersonic beam by elastic reflection from a receding atomic mirror. We use a pulsed supersonic nozzle to generate a 511+/-9 m/s beam of helium that we slow by reflection from a Si(111)-H(1x1) crystal placed on the tip of a spinning rotor. We were able to reduce the velocity of helium by 246 m/s and show that the temperature of the slowed beam is lower than 250 mK in the comoving frame.
authors.affiliation: Center for Nonlinear Dynamics and Department of Physics, The University of Texas at Austin, Austin, Texas 78712-1081, USA.
authors.forename: E
authors.initials: E
authors.lastname: Narevicius
authors.forename: A
authors.initials: A
authors.lastname: Libson
authors.forename: M F
authors.initials: MF
authors.lastname: Riedel
authors.forename: C G
authors.initials: CG
authors.lastname: Parthey
authors.forename: I
authors.initials: I
authors.lastname: Chavez
authors.forename: U
authors.initials: U
authors.lastname: Even
authors.forename: M G
authors.initials: MG
authors.lastname: Raizen