Gas density distribution in a clustered-gas jet produced from a supersonic slit nozzle under high backing pressure
Huwang Xu,
Guanglong Chen,
D. N. Patel,
Yunjiu Cao,
Li Ren,
Hongxia Xu,
Huili Shao,
Jianping He,
Dong Eon Kim
Affiliations
Huwang Xu
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China
Guanglong Chen
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China
D. N. Patel
Department of Physics and Center for Attosecond Science and Technology, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
Yunjiu Cao
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China
Li Ren
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China
Hongxia Xu
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China
Huili Shao
School of Mathematics, Physics and Statistics, Shanghai University of Engineering Science, Shanghai 201620, China
Jianping He
School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
Dong Eon Kim
Department of Physics and Center for Attosecond Science and Technology, Pohang University of Science and Technology, Pohang, Gyeongbuk 37673, South Korea
A gas jet produced by adiabatic expansion of gas through a slit nozzle into a vacuum has been served as a target in the study of high harmonic generation or laser wakefield electron acceleration. In this work, Mach–Zehnder interferometry was utilized to obtain the gas density distribution in an argon cluster gas jet produced from a supersonic slit nozzle. The interference fringe distortion caused by the gas jet along the slit width under high backing pressure was recorded and inverted to a gas density profile. The gas backing pressure was up to 80 bars to obtain a gas jet with a higher density. It is found that the gas density in the jet is not uniform along the width direction of the slit nozzle and is the highest at the center of the jet. Along the gas jet, the highest gas density roughly decreases linearly. However, a steep density gradient is observed at P0 = 60–80 bars. Meanwhile, the highest gas density depends linearly on the gas backing pressure and the degree of dependence gradually decreases along the gas jet.
