Electrostatic extraction of cold molecules from a cryogenic reservoir

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...

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Bibliographic Details
Published in:arXiv.org 2009-01
Main Authors: van Buuren, L D, Sommer, C, Motsch, M, Pohle, S, Schenk, M, Bayerl, J, Pinkse, P W H, Rempe, G
Format: Article
Language:English
Subjects:
Depletion
Fluxes
Helium
Quadrupoles
Online Access:Get full text
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Summary: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 \((82 \pm 10)%\).
ISSN:2331-8422
DOI:10.48550/arxiv.0806.2523