Frequency dependence of two-frequency (2-f) microwave {open_quotes}ionization{close_quotes} of 3d H atoms: Experiment vs. calculations
- and others
Intrigued by Howard`s classical theoretical prediction how to choose a frequency {nu}{sub 1} that will decrease most the {open_quotes}ionization{close_quotes} threshold amplitude F{sub 2} for 1d H atoms driven by {nu}{sub 2}, we did 2-f {open_quotes}ionization{close_quotes} experiments. Traversing a 26-40 GHz waveguide, n{sub 0}=57 3d H atoms saw a 4.3 ns long, half-sinewave pulse of 2-f field. (Broadband TWTA added shot noise was kept weak, but we also investigated the effect of increasing it.) {nu}{sub 2} was fixed at 35.00 GHz (n{sub 0}{sup 3}{omega}{sub 2}=0.986 for n{sub 0}=57) while {nu}{sub 1} was varied over n{sub 0}{sup 3}{omega}{sub 1}=0.7-0.88. Our classical and quantal 1d calculations over a wider {nu}{sub 1} range agree well and demonstrate classical scaling; both reproduce reasonably well our experimental results. We are presently investigating the physical reason(s) for the frequency dependence we found.
- OSTI ID:
- 281287
- Report Number(s):
- CONF-9305421--; CNN: Grant PHY-8922506
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 38; ISSN 0003-0503; ISSN BAPSA6
- Country of Publication:
- United States
- Language:
- English
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