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Application of Ion Cyclotron Resonance to the Study of Inelastic Excitation by Low-Energy Electrons

Ridge, Douglas P. and Beauchamp, J. L. (1969) Application of Ion Cyclotron Resonance to the Study of Inelastic Excitation by Low-Energy Electrons. Journal of Chemical Physics, 51 (1). pp. 470-471. ISSN 0021-9606.

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The geometry of the resonance cell employed for ion cyclotron resonance spectroscopy (1-3) is ideally suited for studying inelastic excitation by low-energy electrons. It has been shown that the electron beam traverses a parabolic potential well between the trapping electrodes, the depth of which is approximately half the applied trapping voltage (3,4). Low-energy electrons generated by impact excitation of an atomic or molecular energy level can be trapped in the resonance cell if their final translational energy is insufficient to escape the preset depth of the potential well. These electrons can be drifted from the source of the resonance region by applying the usual static drift field E normal to the primary magnetic field H (4). The electron drift velocity in this crossed field geometry, given by cE/H, is independent of both charge and mass. For typical values of E and H the drift velocity is in the range of 10^1-10^3 cm/sec. In the lower range of accessible drift velocities, the residence time of electrons in the resonance cell approaches 0.1 sec.

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Additional Information:©1969 American Institute of Physics. Received 3 February 1969. This work was supported in part by the United States Atomic Energy Commission under Contract No. AT(04-3)-757, extended to J.L. Beauchamp. [J.L.B. was an] Alfred P. Sloan Fellow, 1968-1970. Arthur A. Noyes Laboratory of Chemical Physics, Contribution No. 3805.
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Deposited On:12 Jun 2008
Last Modified:26 Dec 2012 10:05

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