Sputtering studies of lithiated ATJ graphite by lithium ion bombardment

Sputtering yields of Li⁺ on ATJ graphite at 45 degree incidence with 700 eV-2000 eV accelerations were studied. Typically, 4 times 10¹³ ions/(cm² s) flux of Li⁺ beam was obtained from LiCl powder in a Colutron ion source. Sputtered particles were collected by a quartz crystal microbalance to determine sputtering yields. The experiment was repeated after lithium was evaporated onto the ATJ graphite target. Suppressed amounts of sputtered particles were observed after lithium treatment. Deuterium saturation treatment for lithiated graphite was also done to simulate actual divertor conditions. The sputtering yield after deuterium saturation does not show distinct differences with non-saturated samples.