A comprehensive set of experimental tests has been carried out at Consorzio RFX regarding the construction of the grids for the ITER Neutral Beam Injectors, in order to validate the proposed manufacturing methodologies, to further develop the details of the engineering design, a nd to adapt existing production techniques to the specific case. In the framework of this R&D program, two Multi Channel Prototypes (MCPs) have been designed and manufactured. These prototypes feature all the possible manufacturing issues of the SPIDER gri ds. In fact, they reproduce the geometry of the Extraction Grid (EG) for SPIDER by having the same thickness, same cooling channels, same distributors, same aperture shape and same slots for the magnets of an EG segment. The differences with respect to the SPIDER EG segment regard only the overall dimensions, i.e. reduced width (one fourth) and height (one half). In this activity the MCP #2 has been used for magnetic mapping of the magnetic configuration foreseen for MITICA EG, developed at RFX, see [1] , and already tested on MCP #2 in 2013. A new set of CESM and ADCM has been installed on MCP #2, having a reduced tolerance between the grooves and consequently less po sitioning errors. Moreover both the new CESM and ADCM have been characterized using a specifically developed tool and selected on the basis of best magnetic uniformity. Therefore, the magnetic uniformity of the whole MCP is expected to be slightly better than in 2013.
Report on the Multi Channel grid Prototypes magnetic tests
Agostinetti P;
2015
Abstract
A comprehensive set of experimental tests has been carried out at Consorzio RFX regarding the construction of the grids for the ITER Neutral Beam Injectors, in order to validate the proposed manufacturing methodologies, to further develop the details of the engineering design, a nd to adapt existing production techniques to the specific case. In the framework of this R&D program, two Multi Channel Prototypes (MCPs) have been designed and manufactured. These prototypes feature all the possible manufacturing issues of the SPIDER gri ds. In fact, they reproduce the geometry of the Extraction Grid (EG) for SPIDER by having the same thickness, same cooling channels, same distributors, same aperture shape and same slots for the magnets of an EG segment. The differences with respect to the SPIDER EG segment regard only the overall dimensions, i.e. reduced width (one fourth) and height (one half). In this activity the MCP #2 has been used for magnetic mapping of the magnetic configuration foreseen for MITICA EG, developed at RFX, see [1] , and already tested on MCP #2 in 2013. A new set of CESM and ADCM has been installed on MCP #2, having a reduced tolerance between the grooves and consequently less po sitioning errors. Moreover both the new CESM and ADCM have been characterized using a specifically developed tool and selected on the basis of best magnetic uniformity. Therefore, the magnetic uniformity of the whole MCP is expected to be slightly better than in 2013.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
