Tritz K, Stutman D, Delgado-Aparicio L, Finkenthal M, Kaita R, Roquemore L
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Rev Sci Instrum. 2010 Oct;81(10):10E502. doi: 10.1063/1.3460632.
A novel diagnostic design seeks to enhance the capability of multienergy soft x-ray (SXR) detection by using an image intensifier to amplify the signals from a larger set of filtered x-ray profiles. The increased number of profiles and simplified detection system provides a compact diagnostic device for measuring T(e) in addition to contributions from density and impurities. A single-energy prototype system has been implemented on NSTX, comprised of a filtered x-ray pinhole camera, which converts the x-rays to visible light using a CsI:Tl phosphor. SXR profiles have been measured in high performance plasmas at frame rates of up to 10 kHz, and comparisons to the toroidally displaced tangential multi-energy SXR have been made.
