AUGER ANALYSIS OF SURFACE DEPOSITS FORMED BY EXPOSURE TO PLASMA DISCHARGES IN DOUBLET III

A new sample transfer and analysis station, incorporating modular design features, is used in an initial series of studies of surface deposits produced by tokamak discharges in Doublet III. A functional description of the new apparatus is given in addition to a summary of the results of semi-quantative Auger analysis of surface deposits formed over the course of a 350 discharge period of tokamak operation, during which time Ti gettering was first employed. Excluding Ti, the deposit density can be inferred to be approximately 2. 3 multiplied by 10**1**4 atoms cm** minus **2 per discharge and to consist primarily of C, Ni, and O, in order of decreasing percentage.