Diagnostics of the ITER neutral beam test facility

• DOI: 10.1063/1.3662017
• Publication Date: 2012-02-07T03:15:58Z
• Authors: R. Pasqualotto; G. Serianni; P. Sonato; M. Agostini; M. Brombin; G. Croci; M. Dalla Palma; M. De Muri; E. Gazza; G. Gorini; N. Pomaro; A. Rizzolo; M. Spolaore; B. Zaniol
• Keywords: Nuclear plasma diagnostics; GEM; gas detectors; 0103 physical sciences; caesium, deuterium, fusion reactor design, hydrogen ions, negative ions, plasma beam injection heating, plasma diagnostics, plasma sources, plasma toroidal confinement, thermocouples, Tokamak devices; 01 natural sciences; Nuclear diagnostics

The ITER heating neutral beam (HNB) injector, based on negative ions accelerated at 1 MV, will be tested and optimized in the SPIDER source and MITICA full injector prototypes, using a set of diagnostics not available on the ITER HNB. The RF source, where the H−/D− production is enhanced by cesium evaporation, will be monitored with thermocouples, electrostatic probes, optical emission spectroscopy, cavity ring down, and laser absorption spectroscopy. The beam is analyzed by cooling water calorimetry, a short pulse instrumented calorimeter, beam emission spectroscopy, visible tomography, and neutron imaging. Design of the diagnostic systems is presented.