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    • 4. 发明申请
    • OPTICAL DETECTION OF TRACER GASES IN A GAS DISCHARGE CELL HAVING UNEXPOSED ELECTRODES
    • 具有不同电极的放电电池中的示踪气体的光学检测
    • WO2017064265A1
    • 2017-04-20
    • PCT/EP2016/074743
    • 2016-10-14
    • INFICON GMBH
    • SCHWARTZ, VladimirCHERNODBROD, Boris
    • G01N21/31G01N21/67G01N21/68G01M3/00G01M3/38G01M3/20G01N21/33G01N1/22H05H1/00
    • G01N21/3103G01M3/202G01M3/226G01N21/67G01N21/68G01N2021/3125H05H1/2406H05H2001/2456
    • Tracer gas sensing device comprising a gas discharge cell (12) having cell walls (14) defining a discharge volume (30) and a tracer gas inlet (16) into the discharge volume (30), an optical spectrometer arrangement having a radiation source (26) on a first side of the discharge cell for emitting radiation into the discharge cell and a radiation detector (28) on a second side of the discharge cell opposite to the first side for detecting radiation which was emitted by the radiation source (26) through the discharge volume (30), and electrodes (32) on opposing sides of the discharge cell for generating a plasma within the discharge cell, said electrodes (32) being unexposed plasma electrodes (32). The discharge cell may be a dielectric barrier discharge cell and the electrodes may be powered by an AC power source. Furthermore, at least one magnet may be positioned behind each electrode to minimize losses of plasma electrons on the discharge cell walls. Either tracer or buffer gas may be helium, hydrogen, oxygen, neon, nitrogen or combinations thereof.
    • 示踪气体传感装置包括气体放电单元(12),该气体放电单元具有限定放电容积(30)的单元壁(14)和进入放电容积(30)的示踪气体入口(16); 光谱仪装置,其具有在放电室的第一侧上的用于向放电室发射辐射的辐射源(26)以及在放电室的与第一侧相对的第二侧上的放射线检测器(28),用于检测 由放射源(26)通过放电容积(30)发射的放电单元和用于在放电单元内产生等离子体的放电单元的相对侧上的电极(32),所述电极(32)是未暴露的等离子体电极(32)。 放电单元可以是电介质阻挡放电单元,并且电极可以由AC电源供电。 此外,至少一个磁体可以位于每个电极后面以最小化放电单元壁上的等离子体电子的损失。 示踪剂或缓冲气体可以是氦气,氢气,氧气,氖气,氮气或其组合。