Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 53 / Number 2 / Pages 281-303
Kenneth M. Young
Fusion Science and Technology / Volume 53 / Number 2 / Pages 281-303
Format:electronic copy (download)
This paper introduces this special issue on plasma diagnostics for magnetic fusion research. Its primary purpose is to relate the measurements of plasma parameters to the physics challenges to be faced on operating and planned devices and also to identify the diagnostic techniques that are used to make these measurements. The specific physics involved in the application of the techniques will be addressed in subsequent chapters. This chapter is biased toward measurements for tokamaks because of their proximity to the burning plasma frontier, and to setting the scene for the development work associated with ITER. Hence, there is some emphasis on measurements for alpha-physics studies and the need for plasma measurements as input to actuators to control the plasma, both to optimize the device performance and to protect the surrounding material. The very different approach to the engineering of diagnostics for a burning plasma is considered, emphasizing the needs for new calibration ideas, reliability and hardness against, and compatibility with, radiation. New ideas take a long time to be converted into "workhorse" sophisticated diagnostics so that investment in new developments is essential for ITER, particularly for the measurement of alpha particles.
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