X rays from optical-field ionized plasmas at low density
- Max-Planck-Institut fuer Quantenoptik, D-85748 Garching (Germany)
We present results of an experiment in which x rays from an optical-field ionized plasma are generated under well-controlled conditions in a low-pressure gas cell. In this way high-density effects such as electron heating, collisional ionization, and ionization defocusing are avoided. Using N{sub 2} as the medium, we show that many features of the soft-x-ray emission follow theoretical predictions. In particular, higher x-ray intensity is observed on most lines for circularly than for linearly polarized light. However, several Li-like lines show anomalously strong emission for linear polarization. Mechanisms that may be responsible for this effect are discussed. {copyright} {ital 1997} {ital Optical Society of America}
- OSTI ID:
- 503638
- Journal Information:
- Optics Letters, Vol. 22, Issue 10; Other Information: PBD: May 1997
- Country of Publication:
- United States
- Language:
- English
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