Laser mass spectrometric studies of high temperature superconductor ablation
Laser ablation of bulk High Temperature Superconductor (HTS) material promises to provide a useful means of producing high quality HTS thin films. Mass spectrometric probes of the ablation plume provide a microscopic understanding of the ablation event and plume development as well as providing a process monitor for the thin film production. Detection of the nascent ions in the plume provides real time analytical information, e.g., identification of impurities, major and minor ablation species, etc. The common contaminants sodium and strontium have been easily detected by this technique in a variety of different HTS bulk materials. In contrast, detection of the ablated neutral species by Resonance Ionization Mass Spectrometry (RIMS) provides physical information about the ablation process. Time-of-flight/RIMS detection of Cu, Y, and BaO ablated from YBa{sub 2}Cu{sub 3}O{sub x} indicates the ablation involves post-desorption gas phase collisions, thereby influencing the ablation chemistry and dynamics (e.g., angular and velocity distributions). Approximately equal velocities are observed for all neutral species at constant ablation laser fluence. 17 refs., 4 figs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- DOE/MA
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 7008023
- Report Number(s):
- LA-UR-90-165; CONF-900140-10; ON: DE90006518
- Resource Relation:
- Journal Volume: 1208; Conference: SPIE optics, electro-optics and laser applications in science and engineering conference and exhibition, Los Angeles, CA (USA), 20-25 Jan 1990
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
LASERS
MASS SPECTROSCOPY
SUPERCONDUCTORS
ABLATION
DOCUMENTATION
EFFICIENCY
GAUSS FUNCTION
ION DETECTION
KNUDSEN FLOW
MANUFACTURING
MATHEMATICAL MODELS
MAXWELL EQUATIONS
MEASURING METHODS
PHOTOIONIZATION
PLASMA
PLUMES
PRESSURE EFFECTS
QUALITY CONTROL
SAMPLING
TECHNOLOGY ASSESSMENT
TEMPERATURE EFFECTS
THIN FILMS
TIME MEASUREMENT
CHARGED PARTICLE DETECTION
CONTROL
DETECTION
DIFFERENTIAL EQUATIONS
EQUATIONS
FILMS
FLUID FLOW
FUNCTIONS
GAS FLOW
IONIZATION
PARTIAL DIFFERENTIAL EQUATIONS
RADIATION DETECTION
SPECTROSCOPY
360601* - Other Materials- Preparation & Manufacture
426001 - Engineering- Superconducting Devices & Circuits- (1990-)
426002 - Engineering- Lasers & Masers- (1990-)
990200 - Mathematics & Computers