Measurement performance assessment for the ITER CXRS Edge diagnostic system

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.