Pace DC, Granetz RS, Vieira R, Bader A, Bosco J, Darrow DS, Fiore C, Irby J, Parker RR, Parkin W, Reinke ML, Terry JL, Wolfe SM, Wukitch SJ, Zweben SJ. Energetic ion loss detector on the Alcator C-Mod tokamak.
THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012;
83:073501. [PMID:
22852689 DOI:
10.1063/1.4731655]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Accepted: 06/12/2012] [Indexed: 06/01/2023]
Abstract
A scintillator-based energetic ion loss detector has been successfully commissioned on the Alcator C-Mod tokamak. This probe is located just below the outer midplane, where it captures ions of energies up to 2 MeV resulting from ion cyclotron resonance heating. After passing through a collimating aperture, ions impact different regions of the scintillator according to their gyroradius (energy) and pitch angle. The probe geometry and installation location are determined based on modeling of expected lost ions. The resulting probe is compact and resembles a standard plasma facing tile. Four separate fiber optic cables view different regions of the scintillator to provide phase space resolution. Evolving loss levels are measured during ion cyclotron resonance heating, including variation dependent upon individual antennae.
Collapse