Graduate Thesis Or Dissertation
 

Coulomb Explosion in Moderately Intense Nanosecond Laser Fields

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6q182t58k

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  • In this dissertation, I present experimental observations of multiply charged atomic ions (MCAI) generated from interactions of atomic/molecular clusters with moderately intense nanosecond laser pulses. This process is also known as Coulomb explosion (CE) and it has been extensively studied in intense laser fields using ultrashort pulses. Several prevailing theories have been developed to explain the mechanism of CE in intense laser fields. Nevertheless, the mechanism of CE in moderately intense nanosecond laser fields is still a topic of debate as theories from intense fields encounter difficulties in explaining highly charged atomic ions observed using nanosecond pulses. This project aims to provide a satisfactory mechanism to explain the formation of MCAI in nanosecond laser fields. This dissertation covers our systematic investigations in the topic. Effects of laser intensities, cluster sizes, structures of cluster, and dopant molecules have been studied. Based on our experimental results, we have proposed a surface field ionization as one of the mechanisms of CE in nanosecond laser fields.
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  • National Science Foundation
  • National Institutes of Health
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