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Research and Development on Advanced Graphite Materials. Volume XVII. Radiography of Carbon and Graphite.

AD600339

Publication Date	1964
Personal Author	Furnas, T. C.; Rosumny, M. R.
Page Count	32
Abstract	A study was made to establish optimum exposure conditions for the radiographic detection of minimum size defects in thicknesses of graphite varying from four to sixteen inches. Through the use of grids and associated techniques, 0.5 per cent sensitivity or better was attained on high density graphite as follows: 4 in. Graphite -- 0.5 per cent sensitivity on M, single emulsion on M and HD films at 110 KV; 8 in. Graphite -- 0.4 per cent sensitivity on AA film at 150 KV; 12 in. Graphite -- 0.35 per cent sensitivity on HF film with Cobalt-60; 16 in. Graphite -- 0.3 per cent sensitivity on HD film with Cobalt-60. Other parameters and techniques were investigated, such as direct X-ray magnification, screens, films, developers, and position of defect. The use of the grid made the greatest contribution towards an increase in sensitivity. (Author)
Keywords	GRAPHITE REFRACTORY MATERIALS RADIOGRAPHY CARBON THICKNESS DENSITY QUALITY CONTROL SENSITIVITY FILMS COLLIMATORS
Corporate Authors	Picker X-Ray Corp Cleveland Ohio
Document Type	Technical Report
Title Note	Technical documentary rept., 1 Feb 62-31 Jan 63.
NTIS Issue Number	196501
Contract Number	AF33 616 6915

Research and Development on Advanced Graphite Materials. Volume XVII. Radiography of Carbon and Graphite.

Research and Development on Advanced Graphite Materials. Volume XVII. Radiography of Carbon and Graphite.
AD600339

Publication Date	1964
Personal Author	Furnas, T. C.; Rosumny, M. R.
Page Count	32
Abstract	A study was made to establish optimum exposure conditions for the radiographic detection of minimum size defects in thicknesses of graphite varying from four to sixteen inches. Through the use of grids and associated techniques, 0.5 per cent sensitivity or better was attained on high density graphite as follows: 4 in. Graphite -- 0.5 per cent sensitivity on M, single emulsion on M and HD films at 110 KV; 8 in. Graphite -- 0.4 per cent sensitivity on AA film at 150 KV; 12 in. Graphite -- 0.35 per cent sensitivity on HF film with Cobalt-60; 16 in. Graphite -- 0.3 per cent sensitivity on HD film with Cobalt-60. Other parameters and techniques were investigated, such as direct X-ray magnification, screens, films, developers, and position of defect. The use of the grid made the greatest contribution towards an increase in sensitivity. (Author)
Keywords	GRAPHITE REFRACTORY MATERIALS RADIOGRAPHY CARBON THICKNESS DENSITY QUALITY CONTROL SENSITIVITY FILMS COLLIMATORS
Corporate Authors	Picker X-Ray Corp Cleveland Ohio
Document Type	Technical Report
Title Note	Technical documentary rept., 1 Feb 62-31 Jan 63.
NTIS Issue Number	196501
Contract Number	AF33 616 6915