Helicon Plasma Potential Measurements Using a Heavy Ion Beam Probe (Final Report).

Schoch, P. M. ; Connor, K. A. ; Si, J.

Technical Information Center Oak Ridge Tennessee

关键词: Plasmas(Physics);    Fluctuations;    High frequencies;    Measurement;    Nuclear fusion;   

RP-ID  :  DE2006850281

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

A Heavy Ion Beam Probe, HIBP, has been installed on a helicon plasma device. The objective was to measure plasma fluctuations at the 13.55MHz RF frequency. This offers a unique challenge for the HIBP, because the transit time of the probing ion is long compared to the fluctuations of interest. For previous HIBPs, the transit time has been short compared to the period of the fluctuations which permits one to assume that the magnetic and electric fields are static. Modeling has shown that the diagnostic will still accurately measure the average potential. The fluctuating potential was to be detected but the absolute magnitude is difficult to determine with signal from a single point. However, modeling indicates multipoint measurements will allow one to resolve the absolute fluctuation magnitude.