A nozzle for high-density supersonic gas jets at elevated temperatures

Research output: Contribution to journalArticle

Abstract

We present the development of a gas nozzle providing high-density gas at elevated temperatures inside a vacuum environment. Fused silica is used as the nozzle material to allow the placement of the nozzle tip in close proximity to an intense, high-power laser beam, while minimizing the risk of sputtering nozzle tip material into the vacuum chamber. Elevating the gas temperature increases the gas-jet forward velocity, allowing us to replenish the gas volume in the laser-gas interaction region between consecutive laser shots. The nozzle accommodates a 50 μm opening hole from which a supersonic gas jet emerges. Heater wires are used to bring the nozzle temperature up to 730 °C, while a cooling unit ensures that the nozzle mount and the glued nozzle-to-mount connection is kept at a temperature below 50 °C. The presented nozzle design is used for high-order harmonic generation in hot gases using gas backing pressures of up to 124 bars.

Details

Authors
  • C. M. Heyl
  • S. B. Schoun
  • G. Porat
  • H. Green
  • J. Ye
Organisations
External organisations
  • University of Colorado
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Accelerator Physics and Instrumentation
Original languageEnglish
Article number113114
JournalReview of Scientific Instruments
Volume89
Issue number11
Publication statusPublished - 2018
Publication categoryResearch
Peer-reviewedYes