%0 Journal Article
%T A Compact Tunable Diode Laser Absorption Spectrometer to Monitor CO2 at 2.7 ¦Ìm Wavelength in Hypersonic Flows
%A Raph£¿el Vallon
%A Jacques Soutad¨¦
%A Jean-Luc V¨¦rant
%A Jason Meyers
%A S¨¦bastien Paris
%A Ajmal Mohamed
%J Sensors
%D 2010
%I MDPI AG
%R 10.3390/s100606081
%X Since the beginning of the Mars planet exploration, the characterization of carbon dioxide hypersonic flows to simulate a spaceship¡¯s Mars atmosphere entry conditions has been an important issue. We have developed a Tunable Diode Laser Absorption Spectrometer with a new room-temperature operating antimony-based distributed feedback laser (DFB) diode laser to characterize the velocity, the temperature and the density of such flows. This instrument has been tested during two measurement campaigns in a free piston tunnel cold hypersonic facility and in a high enthalpy arc jet wind tunnel. These tests also demonstrate the feasibility of mid-infrared fiber optics coupling of the spectrometer to a wind tunnel for integrated or local flow characterization with an optical probe placed in the flow.
%K gas sensor
%K tunable diode laser absorption spectroscopy
%K distributed feedback (DFB)
%K laser velocimetry
%K CO2 monitoring
%K hypersonic flow
%K Mars atmosphere
%U http://www.mdpi.com/1424-8220/10/6/6081