Open AccessTPX: Contractor preliminary design review. Volume 5, Manufacturing R&D
Author(s) -
J. F. Roach,
W. M. Urban,
Dave Hartman
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/234697
Subject(s) - materials science , liquid nitrogen , capacitance , volume (thermodynamics) , epoxy , composite material , dielectric , kapton , thermal insulation , fabrication , electrode , optoelectronics , chemistry , medicine , polyimide , physics , alternative medicine , organic chemistry , quantum mechanics , layer (electronics) , pathology
TPX Insulation & Impregnation R&D test results are reported for 1x2 samples designed for screening candidate conduit insulation systems for TPX PF and TF coils. The epoxy/glass insulation system and three proposed alternate insulation systems employing Kapton, was evaluated in as received sample condition and after 10 thermal cycles in liquid nitrogen. Two DGBA impregnation systems, Shell 826 and CTD101K were investigated. Square incoloy 908 and 316 LN stainless hollow conduits were used for 1x2 sample fabrication. Capacitance, dielectric loss, and insulation resistance dielectric characteristics were measured for all samples. Partial discharge performance was measured for samples either in air, under silicon oil, or under liquid nitrogen up to 10kVrms at 60 Hz. Hipot screening was performed at 10 kVdc. The samples were cross sectioned and evaluated for impregnation quality. The implications of the test results on the TPX preliminary design decision are discussed