Inversion and gain in hydrogenic ion levels induced by photoionization pumping

Journal Article · Mon Aug 01 04:00:00 EDT 1988 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.341909· OSTI ID:6973646

Goodwin, D G; Fill, E E

If a low-Z plasma is subjected to ionizing radiation, stationary inversions on hydrogenic ion level populations occur. The plasma conditions and pumping requirements to achieve gain on the Lyman-..cap alpha.. and Balmer-..cap alpha.. lines are investigated by means of a collisional-radiative model. The calculations are carried out for two cases: first, for the case in which the electron temperature is determined solely by radiative cooling, and second, for the case in which additional electron cooling is provided. In the first case, measurable gain on the Balmer-..cap alpha.. line is found, although the Lyman-..cap alpha.. transition remains uninverted. In the second case, the Balmer-..cap alpha.. gain is dramatically enhanced, and sizable Lyman-..cap alpha.. gain is predicted.

• Research Organization: Max Planck Institut f uer Quantenoptik, D-8046 Garching, Federal Republic of Germany
• OSTI ID: 6973646
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 64:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
BALMER LINES
ELECTRON TEMPERATURE
ENERGY-LEVEL TRANSITIONS
GAS LASERS
IONIZATION
LASERS
LYMAN LINES
MATHEMATICAL MODELS
OPTICAL PUMPING
PUMPING
X-RAY LASERS