Author/Authors :
van der Grinten، نويسنده , , M.G.D. and Pendlebury، نويسنده , , J.M. and Shiers، نويسنده , , D. and Baker، نويسنده , , C.A. and Green، نويسنده , , K. and Harris، نويسنده , , P.G. and Iaydjiev، نويسنده , , P.S. and Ivanov، نويسنده , , S.N. and Geltenbort، نويسنده , , P.، نويسنده ,
Abstract :
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.
