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Measurement performance assessment for the ITER CXRS Edge diagnostic system.

S V Serov¹, M De Bock², M G von Hellermann³

¹Institution "Project Center ITER", 123182 Moscow, Russia.

The Review of Scientific Instruments

|July 10, 2021

Summary

The ITER Charge Exchange Recombination Spectroscopy (CXRS) Edge diagnostic system is validated for measuring plasma parameters. It demonstrates the required accuracy and resolution for ITER

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Area of Science:

Fusion energy research
Plasma physics diagnostics

Background:

The International Thermonuclear Experimental Reactor (ITER) requires advanced diagnostics for plasma control.
The Charge Exchange Recombination Spectroscopy (CXRS) Edge system is crucial for monitoring plasma edge parameters.

Purpose of the Study:

To assess the measurement performance of the latest ITER CXRS Edge diagnostic system design.
To determine the system's accuracy and resolution across various ITER plasma scenarios and impurity concentrations.

Main Methods:

Simulated plasma scenarios covering ITER baseline operation regimes.
Analysis of statistical errors for temperature, density, and rotation velocity measurements.
Evaluation of non-statistical error sources like wall reflections and calibration uncertainties.

Main Results:

Calculated statistical errors for low-Z impurity measurements (He, Be, C, Ne).
Identified minimal impurity concentrations required for accurate measurements.
Confirmed the system's capability to meet accuracy, space, and time resolution requirements.

Conclusions:

The ITER CXRS Edge system is validated for performance.
The diagnostic system is capable of accurately measuring key plasma parameters for ITER operation.