Scholarlink

<p>The photosphere, one of the Sun’s inner layers, and white dwarfs exist as plasmas with high electron density and relatively low temperature, satisfying the strongly coupled condition that the Coulomb coupling parameter exceeds unity. While strongly coupled plasmas are prevalent throughout space, it is difficult to produce and sustain such states in the laboratory with a sufficiently long lifetime for investigation of basic transport processes. To surmount these obstacles, we have developed a laser-produced plasma experiment in supercritical fluids of He, Ar, and Kr. For helium at 100 bar, a nanosecond laser pulse generates a strongly coupled plasma with an electron density, estimated from ionization potential depression (IPD) modeling, of approximately <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(10^{27}\)</EquationSource> </InlineEquation> <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\hbox {m}^{-3}\)</EquationSource> </InlineEquation>, and a temperature of about 1 eV, corresponding to a Coulomb coupling parameter of 4. Systematic experiments with other species show that the pivotal factor for achieving strongly coupled plasmas is the degree of IPD. This study shows the potential to facilitate precise measurements of thermodynamic transport parameters and equation of state for dense plasma states.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Role of ionization potential depression for generation of strongly coupled plasmas in high-pressure supercritical fluids

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月27日

查看全文
  • Juho Lee,
  • Hyojeong Lee,
  • Suho Kim,
  • Hyyong Suk,
  • Gunsu Yun

摘要

The photosphere, one of the Sun’s inner layers, and white dwarfs exist as plasmas with high electron density and relatively low temperature, satisfying the strongly coupled condition that the Coulomb coupling parameter exceeds unity. While strongly coupled plasmas are prevalent throughout space, it is difficult to produce and sustain such states in the laboratory with a sufficiently long lifetime for investigation of basic transport processes. To surmount these obstacles, we have developed a laser-produced plasma experiment in supercritical fluids of He, Ar, and Kr. For helium at 100 bar, a nanosecond laser pulse generates a strongly coupled plasma with an electron density, estimated from ionization potential depression (IPD) modeling, of approximately \(10^{27}\) \(\hbox {m}^{-3}\) , and a temperature of about 1 eV, corresponding to a Coulomb coupling parameter of 4. Systematic experiments with other species show that the pivotal factor for achieving strongly coupled plasmas is the degree of IPD. This study shows the potential to facilitate precise measurements of thermodynamic transport parameters and equation of state for dense plasma states.