Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fast and High-Yield Loading of a D$_2$ MOT of Potassium from a Cryogenic
  Buffer Gas Beam   We demonstrate the direct loading of a D$_2$ MOT of potassium-39 atoms from a
cryogenic buffer gas beam source. We load $10^8$ atoms in a 10 ms pulse, with
no degradation in performance up to a 10 Hz repetition rate. Observed densities
reach $\sim10^{11}$ atoms/cm$^3$ in a single pulse, achieved with no
sub-Doppler cooling or transverse compression. This system produces an ideal
starting point for ultracold atom experiments where high experimental
repetition rates are desirable and initial high densities are critical.
Extension to other atomic species (e.g., refractory metals) that present
technical challenges to high-yield production using oven-based sources is
straightforward.

1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas