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Strategy for Vacuum Insulation Tests of MITICA 1 MV Electrostatic Accelerator

Chitarin G.; Kojima A.; Boldrin M.; Luchetta A.; Marcuzzi D.; Zaccaria P.; Zanotto L.; Toigo V.; Aprile D.; Marconato N.; Patton T.; Pilan N.; Barbato P.; Berton G.; Breda M.; Dan M.; Fincato M.; Lotto L.; Rigoni-Garola A.; Sartori E.; Tollin M.; Valente M.; Grando L.; Pomaro N.; De Lorenzi A.; Hiratsuka J.; Ichikawa M.; Kisaki M.; Murayama M.; Saquilayan G.M.; Tobari H.; Umeda N.; Watanabe K.; Kashiwagi M.

The electrical insulation of the Megavolt ITER Injector and Concept Advancement (MITICA) beam source (BS) at 1 MV in vacuum is a challenging issue, which could not be fully addressed so far on the basis of experimental results and of theoretical models available in literature. A specific high-voltage (HV) test campaign is being prepared to validate and optimize the voltage holding capability of the BS insulation under realistic conditions, using full-size mockup electrodes reproducing in detail the geometry of the BS and accelerator. The proposed test strategy will address both the single-gap and the multistage insulation, so as to obtain a verification of voltage holding at 1 MV before the installation of the real components. This approach is intended to reduce the risk related to the HV insulation at 1 MV and, if necessary, to allow the development of effective corrections. In this article, the test motivations and requirements are defined, and the electrode implementation and diagnostic setup are described. Finally, the test configurations and the experimental procedure are discussed.

ID 466728
DOI 10.1109/TPS.2022.3168341
PRODUCT TYPE Journal Article
LAST UPDATE 2023-07-04T16:34:04Z
EU PROJECT EUROfusion
TITLE Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium
FOUNDING PROGRAM H2020
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