Chapter 7: Measurement of plasma parameters

The physics issues of the measurements of the plasma properties necessary t o provide both the control and science data for achieving the goals of the ITER device are discussed. The assessment of the requirements for these mea surements is first discussed, together with priorities that relate to the e xperimental program. Subsequently, some of the proposed measurement techniq ues, the plasma diagnostics, are described with particular emphasis on thei r implementation on ITER and their capability to meet the requirements. A j udgement on the present status of the diagnostic program on ITER is provide d with some indication of the research and development program necessary to demonstrate viability of techniques or their implementation.