Abstract Key upgrades to a previously developed CO2-Diode Laser Sensor (CO2-DLS) were done to monitor as accurately as possible the level of gas-phase CO2 in champagne glasses. The upgraded CO2-DLS allows to access a wide range of CO2 concentrations (10-100%). An additional set of mirrors with two pairs of galvanometer scanners was developed in order to provide simultaneous measurements of gas-phase CO2 concentrations in the whole glass headspace. During the five minutes after pouring, the CO2-DLS unambiguously unveiled horizontal homogeneity in the glass headspace in terms of gas-phase CO2 concentrations. Nevertheless, a strong vertical gradient of gas-phase CO2 was highlighted, with ever increasing CO2 concentrations ranging from approximately 15% to 50% while moving away from the glass edge to the champagne interface. This strong vertical gradient was found to persist during the five next minutes following the pouring process, but with ever decreasing CO2 concentrations as time elapses.

中文翻译：

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迈向香槟杯顶部空间中气相 CO2 映射的第一步

摘要 对先前开发的 CO2 二极管激光传感器 (CO2-DLS) 进行了关键升级，以尽可能准确地监测香槟杯中的气相 CO2 水平。升级后的 CO2-DLS 允许访问范围广泛的 CO2 浓度 (10-100%)。为了同时测量整个玻璃顶部空间中的气相 CO2 浓度，还开发了一组带有两对振镜扫描仪的附加反射镜。在倾倒后的五分钟内，CO2-DLS 明确地揭示了玻璃顶部空间中气相 CO2 浓度的水平均匀性。然而，强烈的气相 CO2 垂直梯度被突出显示，随着从玻璃边缘移到香槟界面，CO2 浓度不断增加，范围从大约 15% 到 50%。