关键词: 回旋质谱仪, 回旋共振, 离子电流, 共振峰

Abstract:

The configuration of the omegatron detector developed for the HT-7 tokamak is described. The detector has been employed under the condition of ohmic discharges. The detector was located near the limiter and the plasma was introduced into it through a pinhole. The biasing voltages were used to separate the ions and electrons. After being decelerated, the ions enter the cavity and resonate with the superimposing effect of RF electronic field and magnet ic field.Resonant ion current signals have been collected successfully. Analyzing the resonant peak is an effect ive method to acquire the charge-mass ratio and cyclotron frequency of the ions. The resonant peaks of the ions at the charge-mass ratio 1,0.5,0.3333 and 0.1819 were observed in the experiment.

Key words: Omegatron, Cyclotron resonance, Ion current , Resonant peak