Review of atomic data needs for active charge-exchange spectroscopy on ITER

Area of Science:

• Plasma Physics
• Atomic and Molecular Physics
• Fusion Energy Research

Background:

• Quantitative analysis of active beam spectra relies on advanced atomic modeling.
• Accurate diagnostic beam penetration depth is critical for ITER plasma parameter determination.
• Existing atomic data requires verification and error margin assessment for fusion applications.

Purpose of the Study:

• To critically review and verify existing beam-stopping and beam-emission data for hydrogen beams in fusion plasmas.
• To assess the accuracy of atomic data under ITER operating conditions.
• To evaluate the impact of impurities like Helium-ash and Beryllium on beam attenuation.

Main Methods:

• Utilized advanced atomic modeling for quantitative spectral analysis.
• Calculated beam-stopping and beam-emission data for hydrogen beams in fusion plasmas.
• Compared calculated data against the Atomic Data and Analysis Structure (ADAS) database.

Main Results:

• Beam-stopping data in H-plasma showed agreement within 5% with ADAS.
• Beam attenuation calculations including He-ash and Be impurities agreed within 10% with ADAS.
• Beam-emission data deviations were within 15% at densities significantly below ITER's operational range.

Conclusions:

• The verified atomic data supports accurate plasma diagnostics in fusion devices like ITER.
• Current atomic data is reliable for beam-stopping and sufficiently accurate for beam-emission under ITER conditions.
• Further refinement of beam-emission data may be needed for specific low-density regimes.