Du, K.K.DuShen, J.J.Shen2022-03-082022-03-081990https://publica.fraunhofer.de/handle/publica/317748In order to minimize the mass flow rate and the optical distortion of aerodynamic windows, a novel type with a pump cavity and a supersonic gas jet has been developed. Prototypes of this window with an aperture of 4 x 4 qmm have been designed and fabricated. With it, a 80 mbar laser cavity can be sealed up using a gas jet of 5 g/s mass rate at 5.4 bar while the pressure in pump cavity is about 600 mbar and the volume to be pumped is less than 7.2 cbm/h. It can be operated stably if the pressure variation is less than 25 mbar. A wide range of operation pressure of the laser cavity can be realized easily by adjusting the supply pressure for the gas jet and the pressure in the pump cavity.enaerodynamic windownozzlepressurepump cavitypump volumeshock-freestabilitysupersonic gas jetvolume621conference paper