In order to optimize the design and operation of the Ion Source for the ITER Neutral Beam Injector (NBI), a dedicated 100 keV Ion Source Test facility, identified as Source for the Production of Ions of Deuterium Extracted from RF plasma (SPIDER), is under construction in the Neutral Beam Test Facility, at the Consorzio RFX premises, in Padua, Italy. The Ion Source, polarized at 100 kVdc Power Supply (100KV PS) negative voltage, is meant to produce negative ions (Deuterium D- or Hydrogen H-) which, after being extracted by the extraction grid, are accelerated up to the ground potential. The required Ion Source and the Extraction Grid Power Supplies (ISEPS) system and the associated diagnostics need to be hosted inside a High Voltage Deck (HVD), a -100 kVdc air-insulated Faraday cage, while a High Voltage Transmission Line (TL) transmits the power and signal conductors from the ISEPS to the Ion Source. The HVD (its procurement started mid 2013 and foresees its delivery on site in the second half of 2014) will consist of a wide mechanical structure (13m (L) x 11m (W) x 5m (H)), designed to support the weight of the ISEPS components, mounted on supporting insulators and clad with a conductive metal sheet in order to reduce the electromagnetic interference (EMI). The paper will report on the design solutions of the HVD and the related progress in the execution of the procurement activities, focusing on insulation, mechanical and thermal issues. The details of the HVD interfaces with the TL, with the SPIDER Cooling Systems and with the 100kV PS are also described. Finite Element (FE) analyses have been performed, on the one hand, to verify the configuration from the electrostatic point of view and, on the other, to evaluate electrical screen effectiveness from the EMI point of view.
The 100kV Faraday cage (High Voltage Deck) for the SPIDER experiment
Luca Grando;Mauro Recchia;Alberto Pesce;Vanni Toigo;
2014
Abstract
In order to optimize the design and operation of the Ion Source for the ITER Neutral Beam Injector (NBI), a dedicated 100 keV Ion Source Test facility, identified as Source for the Production of Ions of Deuterium Extracted from RF plasma (SPIDER), is under construction in the Neutral Beam Test Facility, at the Consorzio RFX premises, in Padua, Italy. The Ion Source, polarized at 100 kVdc Power Supply (100KV PS) negative voltage, is meant to produce negative ions (Deuterium D- or Hydrogen H-) which, after being extracted by the extraction grid, are accelerated up to the ground potential. The required Ion Source and the Extraction Grid Power Supplies (ISEPS) system and the associated diagnostics need to be hosted inside a High Voltage Deck (HVD), a -100 kVdc air-insulated Faraday cage, while a High Voltage Transmission Line (TL) transmits the power and signal conductors from the ISEPS to the Ion Source. The HVD (its procurement started mid 2013 and foresees its delivery on site in the second half of 2014) will consist of a wide mechanical structure (13m (L) x 11m (W) x 5m (H)), designed to support the weight of the ISEPS components, mounted on supporting insulators and clad with a conductive metal sheet in order to reduce the electromagnetic interference (EMI). The paper will report on the design solutions of the HVD and the related progress in the execution of the procurement activities, focusing on insulation, mechanical and thermal issues. The details of the HVD interfaces with the TL, with the SPIDER Cooling Systems and with the 100kV PS are also described. Finite Element (FE) analyses have been performed, on the one hand, to verify the configuration from the electrostatic point of view and, on the other, to evaluate electrical screen effectiveness from the EMI point of view.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
