Implementation of collective Thomson scattering on the TEXTOR tokamak for energetic ion measurements

Knowledge of the energy spectrum of fast ions in magnetically confined fusi on plasmas is important and fundamental for achieving fusion energy product ion. Collective Thomson scattering (CTS) of high-power electromagnetic radi ation is one of the most promising diagnostic methods for measuring the ene rgy spectrum of confined fast ions. A CTS diagnostic has been implemented o n the TEXTOR tokamak for the study of fast ions. It uses a 400 kW, 110 GHz gyrotron source as the probe and a high-resolution heterodyne radiometer as the receiver. Details of the system are given in this article. First resul ts from the diagnostic show that scattered radiation has been detected. (C) 2001 American Institute of Physics.