First hydrogen operation of NIO1: Characterization of the source plasma by means of an optical emission spectroscopy diagnostic

被引：5

作者：

Barbisan, M. ^{[1
]}

Baltador, C. ^{[1
]}

Zaniol, B. ^{[1
]}

Cavenago, M. ^{[2
]}

Fantz, U. ^{[3
]}

Pasqualotto, R. ^{[1
]}

Serianni, G. ^{[1
]}

Vialetto, L. ^{[4
]}

Wuenderlich, D. ^{[3
]}

机构：

[1] Univ Padua, INFN, ENEA, CNR,Consorzio RFX, C So Stati Uniti 4, I-35127 Padua, Italy

[2] INFN LNL, vle Univ 2, I-35020 Legnaro, Italy

[3] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

[4] Univ Padua, Via 8 Febbraio,2, I-35122 Padua, Italy

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2016年 / 87卷 / 02期

基金：

欧盟地平线“2020”;

关键词：

Electric discharges - Ion sources - Optical emission spectroscopy - Spectrometers - Nickel compounds - Hydrogen - Light emission;

D O I：

10.1063/1.4936084

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

NIO1 (Negative Ion Optimization 1) is a compact and flexible radio frequency H- ion source, developed by Consorzio RFX and INFN-LNL. The aim of the experimentation on NIO1 is the optimization of both the production of negative ions and their extraction and beam optics. In the initial phase of its commissioning, NIO1 was operated with nitrogen, but now the source is regularly operated also with hydrogen. To evaluate the source performances, an optical emission spectroscopy diagnostic was installed. The system includes a low resolution spectrometer in the spectral range of 300-850 nm and a high resolution (50 pm) one, to study, respectively, the atomic and the molecular emissions in the visible range. The spectroscopic data have been interpreted also by means of a collisional-radiative model developed at IPP Garching. Besides the diagnostic hardware and the data analysis methods, the paper presents the first plasma measurements across a transition to the full H mode, in a hydrogen discharge. The characteristic signatures of this transition in the plasma parameters are described, in particular, the sudden increase of the light emitted from the plasma above a certain power threshold.

引用

页数：3

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