Electrostatic extraction of cold molecules from a cryogenic reservoir

Details Electrostatic extraction of cold molecules from a cryogenic reservoir Electrostatic extraction of cold molecules from a cryogenic reservoir

2008-06-16

arxiv.org/abs/0806.2523v2

Phys. Rev. Lett. 102, 033001 (2009)

Physics

Chemical Physics

4 pages, 4 figures, changes to the text, updated figures and references

Scientific paper

10.1103/PhysRevLett.102.033001

We present a method which delivers a continuous, high-density beam of slow and internally cold polar molecules. In our source, warm molecules are first cooled by collisions with a cryogenic helium buffer gas. Cold molecules are then extracted by means of an electrostatic quadrupole guide. For ND$_3$ the source produces fluxes up to $(7 \pm ^{7}_{4}) \times 10^{10}$ molecules/s with peak densities up to $(1.0 \pm ^{1.0}_{0.6}) \times 10^9$ molecules/cm$^3$. For H$_2$CO the population of rovibrational states is monitored by depletion spectroscopy, resulting in single-state populations up to $(82 \pm 10)%$.

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