Düsseldorf 2007 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 22: Cold Molecules I (gemeinsam mit Q)
MO 22.6: Vortrag
Dienstag, 20. März 2007, 12:00–12:15, 6B
A molecular synchrotron — •Cynthia E. Heiner1, David Carty1, Hendrick L. Bethlem1,2, and Gerard Meijer1 — 1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany — 2Laser Centre Vrije Universiteit, Amsterdam, The Netherlands
The tools for manipulating the motion of neutral atoms and molecules are inspired from the techniques developed for charged particles. Traps for atoms, akin to the Paul trap for ions, are widely implemented; surprisingly however, little attention has been paid to developing a neutral analog of a synchrotron. One great advantage of a synchrotron over a trap is that (many) bunches of cold molecules can be made to interact repeatedly, at well defined times and distinct positions with electromagnetic field and/or particles.
I will present recent results demonstrating a molecular synchrotron consisting of two hexapoles bent into a semi-circle separated by a 2 mm gap. I will detail our simple scheme for exploiting the fringe fields in these gaps to accelerate, decelerate, and focus along the longitudinal direction ("bunch") a packet of ammonia molecules. The stored bunch of cold molecules (T=0.5 mK) is confined to a 3 mm packet even after completing 40 roundtrips, which corresponds to a flight distance of over 30 meters. Furthermore, the injection of multiple packets into the ring will be shown.