Scholarlink

<p>Cavity Pressure Acceleration (CPA) is a technique for accelerating dense plasma streams by utilizing laser-generated plasma pressure within a spatially confined region. This approach has been proposed as an alternative to the classical ablative acceleration of plasma. Initially, the primary goal of this approach was to create a dense plasma stream (a theoretical macroparticle delivering energy/momentum) suitable for experiments related to Impact Fast Ignition. In recent experimental sessions, we used targets equipped with cavities lined with deuterated polyethylene (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_1945_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="35" /> </InlineMediaObject> <EquationSource Format="TEX">\(CD_2\)</EquationSource> </InlineEquation>) foils and powder. These targets were irradiated with a <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_1945_Article_IEq2.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="22" /> </InlineMediaObject> <EquationSource Format="TEX">\(1\omega\)</EquationSource> </InlineEquation> PALS sub-kilojoule, low-contrast laser beam (<InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_1945_Article_IEq3.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="131" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda _{1}^{PALS} = 1315~nm\)</EquationSource> </InlineEquation>), focused to an intensity of <InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_1945_Article_IEq4.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="146" /> </InlineMediaObject> <EquationSource Format="TEX">\(1-2 \times 10^{16}~W/cm^{2}\)</EquationSource> </InlineEquation> within a <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_1945_Article_IEq5.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="94" /> </InlineMediaObject> <EquationSource Format="TEX">\(250-350~ps\)</EquationSource> </InlineEquation> pulse. The scheme has proven to be highly efficient in converting laser energy into high-energy interaction products, such as high-density plasma streams and protons. We observed neutron yields among the highest achieved to date in Deuterium-Deuterium laser-induced experiments, even when compared to facilities with lasers operating at significantly higher energies and intensities. 1<i>D</i> hydrodynamic code used to simulate plasma parameters in the targets confirmed the high potential of the method, regardless of the driving laser wavelength.</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

High efficiency of laser energy conversion with cavity pressure acceleration

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月1日

查看全文
  • Tomasz Chodukowski,
  • Stefan Borodziuk,
  • Przemysław Tchórz,
  • Marcin Rosiński,
  • Zofia Rusiniak,
  • Roman Dudzak,
  • Michal Krupka,
  • Jakub Cikhardt,
  • Tomas Burian,
  • Sushil Singh,
  • Maciej Szymanski,
  • Anna Marchenko,
  • Michal Kustosz,
  • Shubham Agarwal,
  • Josef Krasa,
  • Robert Swierczynski,
  • Janina Pokorska,
  • Tadeusz Pisarczyk,
  • Daniel Klir,
  • Jiri Skala,
  • Jan Dostal,
  • Miroslav Krus,
  • Libor Juha

摘要

Cavity Pressure Acceleration (CPA) is a technique for accelerating dense plasma streams by utilizing laser-generated plasma pressure within a spatially confined region. This approach has been proposed as an alternative to the classical ablative acceleration of plasma. Initially, the primary goal of this approach was to create a dense plasma stream (a theoretical macroparticle delivering energy/momentum) suitable for experiments related to Impact Fast Ignition. In recent experimental sessions, we used targets equipped with cavities lined with deuterated polyethylene ( \(CD_2\) ) foils and powder. These targets were irradiated with a \(1\omega\) PALS sub-kilojoule, low-contrast laser beam ( \(\lambda _{1}^{PALS} = 1315~nm\) ), focused to an intensity of \(1-2 \times 10^{16}~W/cm^{2}\) within a \(250-350~ps\) pulse. The scheme has proven to be highly efficient in converting laser energy into high-energy interaction products, such as high-density plasma streams and protons. We observed neutron yields among the highest achieved to date in Deuterium-Deuterium laser-induced experiments, even when compared to facilities with lasers operating at significantly higher energies and intensities. 1D hydrodynamic code used to simulate plasma parameters in the targets confirmed the high potential of the method, regardless of the driving laser wavelength.