An illustration of the diagnostic procedure for in situ surface diagnosis on the Alcator C-Mod tokamak.
Top view of C-Mod. The external neutron detector and validation source positions are highlighted.
In situ diagnosis of boron film thickness
detector gamma energy spectra for four thicknesses of boron film.
The area under the 0.953 MeV photoabsorption peak area can be used to determine boron film thickness.
Experimental and ACRONYM neutron detector efficiencies for three calibration positions. Units of efficiency are in detector counts per source neutron.
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