Probing strong field ionization of solids with a Thomson parabola spectrometer

Pramana

Malay Dalui¹  M Krishnamurthy1 2¹  Ram Gopal²  T Madhu Trivikram¹ 

[1] Tata Institute of Fundamental Research, Dr Homi Bhabha Road, Mumbai 400 005, India$$;TIFR Centre for Interdisciplinary Sciences, 21 Brundavan Colony, Narsingi, Hyderabad 500 075, India$$

关键词: Ion acceleration;    Thomson parabola spectrometer;    laser–plasma.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Intense ultrashort laser pulses are known to generate high-density, high-temperature plasma from any substrate. Copious emission of hot electrons, from a solid substrate, results in strong electrostatic field that accelerates the ions with energies ranging from a few eV to MeV. Ion spectrometry from laser–plasma is convolved with multiple atomic systems, several charge states and a broad energy spread. Conventional mass spectrometric techniques have serious limitations to probe this ionization dynamics. We have developed an imaging ion spectrometer that measures charge/mass-resolved ion kinetic energies over the entire range. Microchannel plate (MCP) is used as the position-sensitive detector to perform online and single shot measurements. The wellresolved spectrum even for the low-energy ions, demonstrates that the spectral width is limited by the space-charge repulsion for the ions generated in the hot dense plasma.

【 授权许可】

Unknown