SPIDER (Source for the Production of Ions of Deuterium Extracted from RF plasma) is the 100keV Ion Source Test facility (presently under construction in the Neutral Beam Test Facility at Consorzio RFX premises, in Padua, Italy) representing the full scale prototype of the Ion Source (IS) for the ITER 1 MeV Neutral Beam Injector (NBI). SPIDER Ion Source, polarized at -100kVdc Power Supply, is meant to produce Deuterium or Hydrogen negative ions which, after being extracted by the extraction grid, are accelerated up to ground potential. The required Ion Source and the Extraction Grid Power Supplies (ISEPS) system and the associated diagnostics need to be hosted inside a -100kVdc air-insulated Faraday cage, called High Voltage Deck (HVD), while a High Voltage Transmission Line (TL) transmits the power and signal conductors from the ISEPS to the Ion Source. An air insulated design of the TL, duly screened against Electromagnetic Interferences (EMI) produced by the frequent IS grids breakdowns was preferred to a more complex and costly Gas Insulated Line design because of the large diameter required by the TL inner conductor to host all ISEPS power and signal conductors, fibres optic and cables. The TL is procured (together with the HVD) by COELME SpA, via a procurement contract with Fusion for Energy (F4E) started mid 2013. The paper describes the construction solutions developed by the Manufacturer to meet the design indications and technical specification requirements for such unconventional device. Moreover, the results of factory type tests, carried out on a first section of the TL mid-2015 to validate the design and release the manufacturing of the overall TL, are also described. Finally, the paper reports on the on-site installation and commissioning activities, presently ongoing, up to the final acceptance foreseen within the current year.
The transmission line for the SPIDER exp eriment: from design to installation
Toigo V;
2016
Abstract
SPIDER (Source for the Production of Ions of Deuterium Extracted from RF plasma) is the 100keV Ion Source Test facility (presently under construction in the Neutral Beam Test Facility at Consorzio RFX premises, in Padua, Italy) representing the full scale prototype of the Ion Source (IS) for the ITER 1 MeV Neutral Beam Injector (NBI). SPIDER Ion Source, polarized at -100kVdc Power Supply, is meant to produce Deuterium or Hydrogen negative ions which, after being extracted by the extraction grid, are accelerated up to ground potential. The required Ion Source and the Extraction Grid Power Supplies (ISEPS) system and the associated diagnostics need to be hosted inside a -100kVdc air-insulated Faraday cage, called High Voltage Deck (HVD), while a High Voltage Transmission Line (TL) transmits the power and signal conductors from the ISEPS to the Ion Source. An air insulated design of the TL, duly screened against Electromagnetic Interferences (EMI) produced by the frequent IS grids breakdowns was preferred to a more complex and costly Gas Insulated Line design because of the large diameter required by the TL inner conductor to host all ISEPS power and signal conductors, fibres optic and cables. The TL is procured (together with the HVD) by COELME SpA, via a procurement contract with Fusion for Energy (F4E) started mid 2013. The paper describes the construction solutions developed by the Manufacturer to meet the design indications and technical specification requirements for such unconventional device. Moreover, the results of factory type tests, carried out on a first section of the TL mid-2015 to validate the design and release the manufacturing of the overall TL, are also described. Finally, the paper reports on the on-site installation and commissioning activities, presently ongoing, up to the final acceptance foreseen within the current year.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
