Coherent slowing of supersonic beams: from atom optics and surface scattering towards fundamental tests
I will discuss recent work in my group to control atomic motion, starting from a supersonic beam of atoms. As a first step wehave slowed ground-state helium atoms by reflection from a moving crystal. This "atomic paddle" can produce a cold and intense beam of helium atoms which will be used to probe atom-surface interactions with unprecedented accuracy. We are developing the atom optics components ofmirrors, beamsplitters and lenses made of single crystals with the long-term goal of a single-crystal interferometer.I will also report our progress on direct magnetic slowing of atoms in a pulsed magnetic field (no lasers). Atoms will be entrained into the supersonic beam and slowed by a series of coils that are pulsed sequentially. This method will be generally applicable to most paramagnetic atoms which constitute over 70% of the periodic table. In addition it should also work for molecular radicals. I will discuss applications of this method to trapping of spin polarized hydrogen isotopes and the possibility of fundamental tests.
10 Minute Talk: Bright Source of Cold Ions for Surface-Electrode Traps