Collis, SDall, RobertHoward, JohnAndruczyk, DJames, Brian W2015-12-100022-4073http://hdl.handle.net/1885/51797A time-dependent collisional radiation model has been used to validate the use of a pulsed helium beam to measure electron temperature profiles in the H-1NF flexible heliac. The diagnostics technique is based on the measurement of helium spectral line ratios which are a strong function of electron temperature while being a weak function of electron density. The validation procedure involves comparing measured and calculated emissivities of spectral lines emitted by helium atoms as a function of position in the beam.Keywords: Electromagnetic wave emission; Helium; Plasma diagnostics; Plasma probes; Radioactivity; Spectrum analysis; Collisional radiative model; Diagnostics techniques; Electron densities; Emission lines; Helium atoms; Radiation models; Spectral lines; Time depen Collisional radiative model; Electron temperature; Helium beam; Plasma diagnostic200910.1016/j.jqsrt.2008.12.0102016-02-24