In the road-map for a fully operational ITER Neutral Beam Injector (NBI), SPIDER represents a necessary step to test its negative ion source design since the required performances have never been achieved simultaneously by any previous experiment. The smaller scale of SPIDER to the full ITER NBI prototype (named MITICA, which will operate in the same test facility in Padova) allows more flexibility in the experiments and, taking advantage of its larger set of diagnostic, will provide insightful results for the entire project development.

This paper is the result of the experience gained within the first two years of SPIDER operation, with the focus on the Ion Source and Extraction Power Supply (ISEPS) system. A review of the system development, of the main outcomes of the first experimental phase and the description of the still open issues, is provided.

在完全运行的 ITER 中性射束注射器 (NBI) 的路线图中，SPIDER 代表了测试其负离子源设计的必要步骤，因为之前的任何实验从未同时实现所需的性能。小规模的 SPIDER 到完整的 ITER NBI 原型（命名为 MITICA，将在帕多瓦的同一测试设施中运行）使实验具有更大的灵活性，并利用其更大的诊断集，将为整个项目发展。

本文是 SPIDER 运行前两年内获得的经验的结果，重点是离子源和提取电源 (ISEPS) 系统。提供了系统开发的回顾、第一个实验阶段的主要结果和仍然悬而未决的问题的描述。