Document Type

Publication - Article

Target and Velocity Dependence of Charge Exchange X-Ray Emission at Solar Wind Velocities

Authors

R. T. Zhang, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, Peopleʼs Republic of ChinaFollow
D. G. Seely, Department of Physics, Albion College, Albion, MI 49224, USAFollow
V.M. Andrianarijaona, Department of Physics and Engineering, Southern Adventist University, Collegedale, TN 37315, USAFollow
F. Jaeckel, Department of Physics, University of Wisconsin, Madison, WI 53706, USAFollow
D. Wulf, Department of Physics, University of Wisconsin, Madison, WI 53706, USAFollow
K. Morgan, Department of Physics, University of Wisconsin, Madison, WI 53706, USA
D. McCammon, Department of Physics, University of Wisconsin, Madison, WI 53706, USAFollow
C. C. Havener, Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6368, USAFollow

Department

Physics & Engineering

Date of Activity

2022

Abstract

Laboratory measurements of X-ray emissions following charge exchange (CX) between highly charged ions and neutrals are important to assess their diagnostic utility for the nonequilibrium astrophysical plasma environments, where hot flows meet cold gases. With a high-resolution X-ray quantum microcalorimeter detector, we report the CX-induced X-ray spectra and line ratios in Ne8+ on He and Kr collisions at solar wind velocities of 392, 554, 678, and 876 km s−1 , respectively. The experimentally determined line ratios quantify the differences in CX state selectivity and the following X-ray emission between He and Kr at different collision velocities. This suggests that target and velocity dependence should be considered for accurately modeling astrophysical CX plasmas.

Recommended Citation

Zhang, R. T.; Seely, D. G.; Andrianarijaona, V.M.; Jaeckel, F.; Wulf, D.; Morgan, K.; McCammon, D.; and Havener, C. C., "Target and Velocity Dependence of Charge Exchange X-Ray Emission at Solar Wind Velocities" (2022). Achieve. 2103.
https://knowledge.e.southern.edu/achieve/2103