|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Accelerated Materials Evaluation for Nuclear Application Utilizing Test Reactors, Ion Beam Facilities and Integrated Modeling
||Y-6: Preliminary Experiments to Develop a He-W Calibration Standard for Laser Induced Breakdown Spectroscopy
||Guinevere Shaw, Nicolas Andre, Mark Bannister, Theodore Biewer, Madhavi Martin, Fred Meyer, Brian Wirth
|On-Site Speaker (Planned)
Laser based diagnostic techniques for plasma-material interactions (PMI) are being developed for future fusion reactors. Laser-induced breakdown spectroscopy (LIBS) can measure elemental surface composition, and is a possible diagnostic for characterizing plasma-facing materials. The purpose of the LIBS system described here is to quantify helium (He) concentration in plasma exposed tungsten (W) targets. To accurately quantify He concentration in situ, a calibration standard must be developed, including systematic evaluation of the entire LIBS system. To accomplish this, two LIBS setups were explored: ex-situ and in-situ LIBS. Ex-situ LIBS experiments used W targets exposed to a He+ ion beam to determine laser parameters and calibration settings for in-situ experiments. In-situ LIBS analysis was performed on W targets exposed to He plasma. Preliminary results will be discussed, and a future experiment combining in-vacuo LIBS with Quadruple Mass Spec analysis will be described to fully calibrate the He concentration in W.
||Planned: A print-only volume