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Characterization and development of diamond-like carbon coatings for storing ultracold neutrons

journal contribution
posted on 2023-06-08, 09:13 authored by M G D van der Grinten, J M Pendlebury, D Shiers, C A Baker, K Green, P G Harris, P S Iaydjiev, S N Ivanov, P Geltenbort
In order to determine the suitability of diamond-like carbon (DLC) as a material for storing ultracold neutrons to use in neutron electric-dipole moment (EDM) experiments, a number of tests on DLC coatings have been performed. Thin DLC layers deposited on quartz and aluminium substrates by chemical vapour deposition have been characterised by neutron transmission, neutron reflectometry, electron microscopy and neutron and mercury storage and depolarisation lifetime measurements. Two types of DLC have been compared; DLC made by chemical vapour deposition from natural methane and DLC made by chemical vapour deposition from deuterated methane. With these samples we determined the density, hydrogen concentration and Fermi potential of the coatings. DLC coatings made from deuterated methane are now succesfully being used in an experiment to measure the EDM of the neutron.

History

Publication status

  • Published

Journal

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ISSN

0168-9002

Publisher

Elsevier

Issue

2-3

Volume

423

Page range

421-427

ISBN

0168-9002

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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