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High resolution fast wave reflectometry: JET design and implications for ITER.

L Cupido¹, A Cardinali, R Igreja

¹EURATOM-IST Association, IPFN, IST, 1049-001 Lisboa, Portugal.

The Review of Scientific Instruments

|December 17, 2008

Summary

This summary is machine-generated.

Measuring the fuel mixture in thermonuclear plasmas is challenging. Fast wave reflectometry offers a solution for precise ion species ratio determination, crucial for maximizing fusion energy output.

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Area of Science:

Plasma physics
Fusion energy research
Diagnostic techniques

Background:

Accurate measurement of hydrogen isotopes in thermonuclear plasmas is difficult due to full stripping and lack of line radiation.
Direct determination of ion species mix is essential for optimizing fusion power output by maintaining a 50/50 ratio.

Purpose of the Study:

To review the design of fast wave reflectometry for the Joint European Torus (JET).
To demonstrate the potential of reflectometry for ITER (International Thermonuclear Experimental Reactor).

Main Methods:

Utilizing fast wave reflectometry with a focus on antenna and detection system design.
Employing vectorial measurements for data acquisition.
Addressing challenges like intrinsic ion cyclotron emission and radiofrequency heating.

Main Results:

The proposed system is designed to measure the fuel ratio with high spatial resolution (centimeters).
The system aims for high temporal resolution (1 ms).
The design is suitable for most JET operational scenarios.

Conclusions:

Fast wave reflectometry is a viable diagnostic for measuring fuel ratios in thermonuclear plasmas.
The reviewed design shows promise for future fusion reactors like ITER.
The system can provide critical data for optimizing fusion performance.