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Pulse-burst laser systems for fast Thomson scattering (invited).
D J Den Hartog1, J R Ambuel, M T Borchardt
1Department of Physics, University of Wisconsin-Madison, 1150 University Avenue, Madison, Wisconsin 53706, USA. djdenhar@wisc.edu
The Review of Scientific Instruments
|November 2, 2010
Summary
Two flashlamp-pumped Nd:YAG lasers were upgraded for pulse-burst capability, enabling high-repetition-rate measurements for plasma diagnostics. This advancement enhances the study of electron temperature dynamics in fusion research.
Area of Science:
- Plasma Physics
- Laser Technology
- Fusion Energy Research
Background:
- Nd:YAG lasers are crucial for plasma diagnostics.
- Existing systems require upgrades for higher temporal resolution.
Purpose of the Study:
- To enhance Nd:YAG lasers with "pulse-burst" capability.
- To improve Thomson scattering diagnostics for plasma research.
Main Methods:
- Upgraded commercial flashlamp-pumped Nd:YAG lasers.
- Implemented insulated gate bipolar transistor (IGBT) switching for variable flashlamp pulse width.
- Directly controlled Pockels cell for optimal pulse energy extraction.
Main Results:
- Achieved pulse-burst capability with up to 15 pulses of 2 J at 1-12.5 kHz.
- Demonstrated ability to extract up to four 2 J pulses per flashlamp pulse.
- Developed a custom system with 250 kHz repetition rate.
Conclusions:
- The upgraded Nd:YAG lasers provide enhanced temporal resolution for plasma diagnostics.
- These advancements facilitate detailed studies of electron temperature profiles and fluctuations.
- New laser systems are critical for future fusion energy investigations.
