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首页> 外文期刊>Plasma and Fusion Research >Development of a 14 GHz Microwave H? Source
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Development of a 14 GHz Microwave H? Source

机译:开发14 GHz微波H?资源

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Microwave power at 14 GHz has excited a H2 plasma in a 2 cm inner diameter 9 cm long alumina tube to generate negative hydrogen ion (H?) beam. A pair of permanent magnets created a magnetic field with the intensity corresponding to an electron cyclotron resonance condition for the input microwave. The ion source produced stable plasmas with the H2 pressure more than 0.5 Pa, while the amount of H? current decreased exponentially against increasing ion source pressure above 0.6 Pa. When the source produced H? beam with constant H2 pressure at 0.6 Pa, the H? beam current saturated against the increase of microwave power above 200 W. These characteristics of the H? beam current indicate poor transport of vibrationally excited hydrogen molecules and that of H? to the ion extraction electrode.
机译:14 GHz的微波功率激发了内径2 cm,长9 cm的氧化铝管中的H 2 等离子体产生负氢离子(H ?)束。一对永磁体产生的磁场强度对应于输入微波的电子回旋共振条件。离子源在H 2 压力大于0.5 Pa时产生稳定的等离子体,而H α电流量则随着离子源压力在0.6 Pa以上的增加而呈指数下降。光源产生的H ?光束在0.6 Pa时具有恒定的H 2 压力,随着微波功率的增加,H ?光束电流随着200 W以上的增加而饱和。H ?束电流的这些特征表明振动激发的氢分子和H ?到离子引出电极的迁移较差。

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