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High-Speed Optical Diagnostics of a Supersonic Ping-Pong Cannon
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High-Speed Optical Diagnostics of a Supersonic Ping-Pong Cannon

Published on: March 24, 2023

Note: A modular and robust continuous supersonic expansion discharge source.

Kyle N Crabtree1, Carrie A Kauffman, Benjamin J McCall

  • 1Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.

The Review of Scientific Instruments
|September 7, 2010
PubMed
Summary
This summary is machine-generated.

A new direct current discharge source coupled with supersonic expansion provides rotationally cold molecular ions for spectroscopy. This robust, modular design achieves ion temperatures between 50-110 K for advanced gas phase studies.

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Area of Science:

  • Physical Chemistry
  • Spectroscopy
  • Plasma Physics

Background:

  • Gas phase spectroscopy requires cold molecular ions for high-resolution studies.
  • Existing methods for generating cold ions can be complex or limited in applicability.

Purpose of the Study:

  • To develop and characterize a novel source for producing rotationally cold molecular ions.
  • To assess the performance of this source for gas phase spectroscopy applications.

Main Methods:

  • Coupling a direct current discharge with a continuous supersonic expansion.
  • Utilizing a modular and robust design constructed from ceramic and stainless steel.
  • Employing cavity ringdown spectroscopy to analyze H(3)(+) ions.

Main Results:

  • Achieved ion rotational temperatures ranging from 50 K to 110 K.
  • Measured ion column densities between 8x10(10) cm(-2) and 2x10(12) cm(-2).
  • Demonstrated stable operation over 200 hours.

Conclusions:

  • The developed source effectively produces rotationally cold molecular ions.
  • This technology is suitable for high-sensitivity gas phase spectroscopy.
  • The modular design offers flexibility for various experimental setups.