10:15 AM - 10:30 AM
[PCG21-06] Development of CRDS (Cavity Ring-down Spectroscopy) aiming water isotope measurements on the moon
Keywords:moon water, Cavity Ring-down Spectroscopy, isotopes
We have been studying to launch a laser isotope measurement system to the moon. CRDS (Cavity Ring-down Spectroscopy) is a powerful method for this purpose because of its accuracy with light weight and power saving characters. Currently, we have been testing a table top device with the sample cell of 50cm in length before building a shorter flight model, and achieved accuracy of 100 ‰, which is almost the same as the required D/H accuracy. By adding stability against vibration and temperature variation, we can expect better stability for water isotope measurements including oxygen isotopes.