Temperature-dependent Sputtering Properties of Liquid Sn due to Low-Energy, Light-Ion Irradiation
Abstract
Sputtering yields of liquid tin have been found to have a clear dependence upon the metal's temperature. Specifically, irradiation of liquid Sn with 300-1000 eV D^+ and He^+ ion beams at 45^o incidence was performed over sample temperatures ranging from room temperature (solid) to near 420 ^oC using the Ion-surface InterAction eXperiment (IIAX). The absolute sputtering yields were measured directly using a pair of quartz-crystal microbalances, one for measurement and one to monitor background effects. A six-fold increase was realized in the sputtering yield of 1 keV helium ions due to increasing the temperature from 20 to 420 ^oC; this factor is much greater than the error of roughly 40% . This phenomenon is not entirely due to phase change as the yield increases almost 50% , also above the error bars, from 300 ^oC to 450 ^oC for the same case. This effect has been reported earlier for liquid lithium [1, 2] and for liquid gallium [3]; the magnitude of temperature enhancement is on the order of that of gallium and less than that of the lithium. [1] JP Allain, MD Coventry, and DN Ruzic, J. Nucl. Mater. 313-316, 636, (2003). [2] RP Doerner, et al., J. Nucl. Mater. 290-293, 166, (2001). [3] RW Conn, et al., Nucl. Fusion 42, 1060, (2002). This work supported by the U.S. Department of Energy ALPS grant # DE-FG02-99ER54515.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2003
- Bibcode:
- 2003APS..DPPLP1103C