Characterization of an atomic hydrogen source for charge exchange experiments.

Area of Science:

• Atomic and Molecular Physics
• Plasma Physics
• Spectroscopy

Background:

• Accurate characterization of atomic hydrogen sources is vital for applications in fusion energy and materials science.
• Distinguishing between atomic and molecular hydrogen in source outputs presents a significant experimental challenge.

Purpose of the Study:

• To quantify the dissociation fraction of a thermal dissociation atomic hydrogen source.
• To develop a spectroscopic method for differentiating atomic and molecular hydrogen.

Main Methods:

• Injecting source output into an electron beam ion trap (EBIT) with highly charged ions.
• Utilizing high-resolution X-ray spectroscopy with a calorimeter spectrometer to record charge exchange spectra.
• Exploiting differences in charge exchange cross-sections between atomic and molecular hydrogen.

Main Results:

• Successfully differentiated between atomic and molecular hydrogen contributions to the X-ray spectrum.
• Provided a quantitative measure of the dissociation fraction of the thermal source.
• Demonstrated the efficacy of X-ray spectroscopy for analyzing neutral species in plasma environments.

Conclusions:

• The developed X-ray spectroscopic technique provides a reliable diagnostic for atomic and molecular hydrogen.
• The characterization of the thermal source's dissociation fraction is essential for optimizing its performance.
• This method has broader implications for analyzing neutral species in various plasma and ion trap experiments.