학술논문
Traveling-wave scheme for the transient pumping of X-ray laser with a sub-ps TW pulse
Document Type
Conference
Author
Source
Technical Digest. Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference Quantum electronics and laser science Quantum Electronics and Laser Science Conference, 1999. QELS '99. Technical Digest. Summaries of Papers Presented at the. :155 1999
Subject
Language
Abstract
Summary form only given. High efficiency of the transient collisional excitation (TCE) pumping of X-ray lasers has been demonstrated recently. TCE relies an the rapid increase of the electron temperature in a preformed plasma irradiated with a short picosecond pulse. This plasma is created by a sub-nanosecond pulse and contains a predominant proportion of the lasant ions. The gain duration is limited to a few ps by several effects such as plasma cooling or ionization while the transit time of the amplified emission along a 1 cm long plasma column is 33 ps. This results in the temporal detuning of the optimal plasma conditions as the X-ray laser pulse propagates. A way to overcome this detuning is to use a travelling wave irradiation of the plasma at the velocity of the X-ray laser pulse. We perform this task by laterally pumping the gain medium by focusing an inhomogeneous pulse (IP) along the plasma column.