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Rotor
Assisted Molecular Cooling
Research Summary:
We have developed a novel method of producing molecular beams
of slow molecules. A supersonic nozzle is mounted tangentially on
the tip of a high-speed, hollow rotor. The rotor spins contrary
to the flow velocity of the nozzle, allowing the rotor's
tangential velocity to negate the supersonic beam's flow
velocity. The centrifugal effect enhances the molecular beam
expansion, resulting in colder molecules. The most recent
research is aimed towards manipulating these molecules within
inhonmogenous electric fields and measuring their velocity more
accurately. The eventual goal of this study is to trap molecules
and further cool them through evaporative cooling.
Latest (and first!) Reference:
"A Mechanical Means to Produce Intense Beams of Slow
Molecules"
Manish Gupta and Dudley Herschbach
The Journal of Physical Chemistry A, Volume 103, pp. 10670-10673
[Abstract]
For further details:
ITAMP Workshop on Trapping, Spectroscopy, and Collisions of
Ultracold Molecules
July 1-3, 1999
Talk by M. Gupta
Artistic antecedents:
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