First spatially resolved measurements of the D–3He <i>α</i>-particle source with the upgraded JET gamma-ray camera
E. Panontin, D. Rigamonti, M. Nocente, A. Dal Molin, A. Brosławski, T. Craciunescu, G. Croci, N. Cruz, J. Figueiredo, L. Giacomelli, G. Gorini, M. Gosk, G. Kaveney, Ye. O. Kazakov, V. Kiptily, S. Korolczuk, G. Marcer, A. Murari, E. Perelli Cippo, M. Salewski, A. Urban, I. Zychor, M. Tardocchi, JET Contributors
Abstract
The Joint European Torus (JET) gamma-ray camera has been recently upgraded with the installation of new gamma-ray detectors, based on LaBr3(Ce) scintillation crystals, which add spectroscopic capability to the existing system allowing measurements with good energy resolution (5% at 0.622 MeV), a dynamic range from hundreds of keV up to about 30 MeV, and high counting rate capabilities of MCps. First gamma-ray measurements during the C38 campaign of the JET have been successfully carried out, in particular, in D–3He plasmas from three-ion ion cyclotron resonance heating experiments, where the detection of 16.4 MeV γ-rays from D + 3He → γ + 5Li reactions with the gamma-ray camera upgrade allowed determining the spatial profile of alpha particles born in D + 3He fusion reactions.