In the framework of the program for the construction - in Padova, Italy - of the first prototype of the International Thermonuclear Experimental Reactor 1 MeV-16 MW negative neutral beam injector (NNBI), an R&D activity on voltage holding in vacuum has been initiated since 2009, aimed at supporting the design, construction, and development of the NNBI accelerator. For this purpose, the high-voltage Padova test facility, designed to operate up to 800 kV, has been built, in parallel to the development of a multivoltage multielectrode voltage holding prediction model (VHPM). This paper focuses on the results of the experimental campaign (up to 270 kV) carried out on a number of electrostatic configurations, aimed at validating the VHPM under a well-controlled condition. The prediction capability of the model is partially confirmed. This result makes it worthwhile to review the physical basis of the model - based on the Cranberg-Slivkov clump theory - while also taking into consideration an alternative breakdown initiation mechanism. © 2012 IEEE.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Nuclear and High Energy Physics
De Lorenzi, A., Pilan, N., & Spada, E. (2013). Progress in the validation of the voltage holding prediction model at the high-voltage padova test facility. IEEE Transactions on Plasma Science, 41(8), 2128 - 2134. . https://doi.org/10.1109/TPS.2013.2249535