Thermal structure of a cloud of a material vaporized by a laser pulse
Abstract
Y-Ba-Cu-O high-Tc superconductor ceramic targets were evaporated by 22-ns pulses of a single-mode Nd:YAG laser with a pulse energy of up to 50 mJ. The parameters of the vaporized material cloud were measured at a distance of 120 mm from the target using a time-of-flight mass spectrometer providing for electron shock ionization. It is found that the temperatures of different parts of the vaporized material cloud may differ by several orders of magnitude at all stages of expansion and contain mixture components in forms characteristic of such temperatures (e.g., ions, atoms, complex molecules, and condensate).
- Publication:
-
Pisma v Zhurnal Tekhnischeskoi Fiziki
- Pub Date:
- November 1991
- Bibcode:
- 1991PZhTF..17...18B
- Keywords:
-
- High Temperature Superconductors;
- Laser Heating;
- Laser Targets;
- Pulsed Lasers;
- Time Of Flight Spectrometers;
- Barium Oxides;
- Copper Oxides;
- Neodymium Lasers;
- Yttrium Oxides;
- Atomic and Molecular Physics