Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-accuracy liquid-sample $\beta$-NMR setup at ISOLDE   Recently there has been an increased interest to apply the sensitive
$\beta$-decay asymmetry detected nuclear magnetic resonance ($\beta$-NMR)
technique to biological studies. A liquid-sample $\beta$-NMR setup was build at
ISOLDE to allow such investigations and to use the resolution gain of
liquid-state NMR in nuclear physics. As part of this setup a magnetic field
locking system, a set of printed circuit board shimming coils, a sample
exchange system, a set of compact $\beta$-detectors and a custom experimental
vacuum chamber were developed. The main magnetic field was stabilized down to
the ppm level by the locking system while allowing the direct determination of
the absolute magnetic field. The homogeneity of the magnetic field was improved
to $\leq$~5~ppm over the sample volume by the shimming coils. Time spent on
changing samples was reduced by a factor of five by the liquid sample exchange
system. During experiments it was possible to continuously observe the liquid
sample thanks to the custom chamber and compact $\beta$-detectors. The absolute
field determination allows for a novel way to reference $\beta$-NMR
measurements, removing the need for time consuming reference measurements. The
improved accuracy and resolution resulting from these innovations allows the
study of the distribution of nuclear magnetization and (bio)chemicals using
high-accuracy liquid-sample $\beta$-NMR.

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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: math
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph