Development of high sensitivity electric field measurement method in plasmas by saturation spectroscopy using a diode laser

2014 Fiscal Year Final Research Report

• Project/Area Number: 24540529
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plasma science
• Research Institution: Hokkaido University
• Principal Investigator: NISHIYAMA Shusuke 北海道大学, 工学(系)研究科(研究院), 助教 (30333628)
• Co-Investigator(Kenkyū-buntansha): SASAKI Koichi 北海道大学, 大学院工学研究院, 教授 (50235248) ; GOTO Motoshi 核融合科学研究所, ヘリカル研究部, 准教授 (00290916)
• Research Collaborator: TAKIZAWA Kazuki ; NAKANO Haruhisa
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: プラズマ計測 / シュタルク分光 / 飽和吸収分光 / シース電界 / 電界計測

Outline of Final Research Achievements

Conventional methods of high sensitivity electric field measurement in plasmas are Stark spectroscopy with a high power tunable laser. In this work, we applied saturation spectroscopy, which is high resolution Doppler-free spectroscopy, to Stark spectroscopy in plasmas with a tunable diode laser. Direct detection of Stark effect in sheath region is achieved for atomic hydrogen Balmer-alpha line with absorption sensitivity enhancement method.

Free Research Field

プラズマ計測