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Published on: September 4, 2013
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A nozzle for high-density supersonic gas jets at elevated temperatures.
C M Heyl1, S B Schoun1, G Porat1
1JILA, NIST and the University of Colorado, 440 UCB, Boulder, Colorado 80309-0440, USA.
The Review of Scientific Instruments
|December 4, 2018
Summary
We developed a fused silica gas nozzle that delivers high-density, hot gas jets for high-order harmonic generation experiments. This design enhances laser-gas interactions in vacuum environments.
Area of Science:
- Plasma Physics
- Laser-Matter Interaction
- Materials Science
Background:
- High-power laser systems require precise gas delivery for experiments.
- Traditional gas nozzles can be damaged by proximity to intense laser beams.
- Efficient gas replenishment is crucial for repetitive laser-gas interaction studies.
Purpose of the Study:
- To develop a novel gas nozzle for high-density, high-temperature gas jets in vacuum.
- To enable close proximity of the nozzle tip to high-power laser beams.
- To improve gas replenishment for laser-gas interaction experiments.
Main Methods:
- Utilized fused silica as the nozzle material for laser compatibility.
- Integrated heater wires to achieve nozzle temperatures up to 730 °C.
- Employed a cooling unit to maintain nozzle mount below 50 °C.
- Designed a 50 μm opening for supersonic gas jet generation.
Main Results:
- Successfully generated high-density supersonic gas jets at elevated temperatures.
- Fused silica nozzle minimized material sputtering into the vacuum chamber.
- Achieved increased gas-jet velocity for efficient interaction region replenishment.
- Demonstrated nozzle operation with gas backing pressures up to 124 bars.
Conclusions:
- The developed fused silica gas nozzle effectively provides hot, high-density gas jets for laser-gas interactions.
- This design is suitable for high-order harmonic generation experiments in vacuum.
- The nozzle's material and temperature control enhance durability and experimental efficiency.
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