direct-imaging mass analyzer

direct-imaging mass analyzer

[də¦rekt ¦im·ij·iŋ ¦mas ′an·ə‚līz·ər] (engineering) A type of secondary ion mass spectrometer in which secondary ions pass through an electrostatic immersion lens which forms an image that bears a point-to-point relation to the ion's place of origin on the sample surface, and then traverse magnetic sectors which effect mass separation. Also known as Castaing-Slodzian mass analyzer.