Characterization of solidified gas thin film targets via alpha particle energy loss
/ Authors
M. Fujiwara, G. Beer, J. Beveridge, J. L. Douglas, T. M. Huber, R. Jacot-Guillarmod, S. Kim, P. Knowles, A. Kunselman, M. Maier
and 16 more authors
G. Marshall, G. Mason, F. Mulhauser, A. Olin, C. Petitjean, T. Porcelli, J. Columbia, Canada, U. Victoria, Triumf, Gustavus Adolphus Coll., U. Fribourg, U. JeonbukNatl, U. Wyoming, Psi, Austrian Academy of Sciences
/ Abstract
Abstract A method is reported for measuring the thickness and uniformity of thin films of solidified gas targets. The energy of α particles traversing the film is measured and the energy loss is converted to thickness using the range. The uniformity is determined by measuring the thickness at different positions with an array of sources. Monte Carlo simulations have been performed to study the film deposition mechanism. Thickness calibrations for a TRIUMF solid hydrogen target system are presented.
Journal: Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment