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Updated: Jul 25, 2026
08:36
An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
Published on: November 3, 2016
Partially ionized hydrogen plasma in strong magnetic fields.
A Y Potekhin1, G Chabrier, Y A Shibanov
1Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia. palex@astro.ioffe.rssi.ru
Summary
We explored hydrogen plasma in strong magnetic fields, finding that atomic properties are significantly altered. This impacts neutron star plasma thermodynamics and equation of state calculations.
Area of Science:
- Plasma Physics
- Astrophysics
- Quantum Mechanics
Background:
- Neutron stars possess extremely strong magnetic fields (10^12-10^13 G).
- The behavior of matter under such extreme conditions is crucial for understanding neutron star interiors.
- Previous models often neglected the detailed quantum mechanical effects on atomic properties in magnetized plasmas.
Purpose of the Study:
- To investigate the thermodynamic properties of partially ionized hydrogen plasma in strong magnetic fields.
- To develop an accurate model for atomic properties, including decentered states, under extreme magnetic conditions.
- To derive and solve an ionization equilibrium equation incorporating magnetic field and nonideality effects.
Main Methods:
- Utilized new fitting formulas for atomic binding energies and sizes based on numerical calculations.
- Incorporated decentered atomic states, previously neglected.
- Employed analytic fits for thermodynamic functions of nonideal fully ionized plasmas.
- Constructed an analytic model for free energy.
- Derived and solved an ionization equilibrium equation using an iteration technique.
Main Results:
- Calculated ionization degrees and occupancies for hydrogen plasma in strong magnetic fields.
- Determined the equation of state for such a plasma.
- Demonstrated the significant impact of quantum mechanical atomic properties and nonideality on plasma thermodynamics.
Conclusions:
- The study provides an improved model for the thermodynamics of magnetized plasmas relevant to neutron stars.
- Accurate modeling of atomic properties, including decentered states, is essential for understanding plasma behavior in extreme magnetic fields.
- The derived equation of state offers a more precise description of matter within neutron stars.
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