Note: A new design for a low-temperature high-intensity helium beam source

B. A.J. Lechner, H. Hedgeland, W. Allison, J. Ellis, A. P. Jardine

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A high-intensity supersonic beam source is a key component of any atom scattering instrument, affecting the sensitivity and energy resolution of the experiment. We present a new design for a source which can operate at temperatures as low as 11.8 K, corresponding to a beam energy of 2.5 meV. The new source improves the resolution of the Cambridge helium spin-echo spectrometer by a factor of 5.5, thus extending the accessible timescales into the nanosecond range. We describe the design of the new source and discuss experiments characterizing its performance. Spin-echo measurements of benzene/Cu(100) illustrate its merit in the study of a typical slow-moving molecular adsorbate species.

Original languageEnglish
Article number026105
JournalReview of Scientific Instruments
Volume84
Issue number2
DOIs
StatePublished - Feb 2013
Externally publishedYes

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