Low energy H atom analyzer using a cesium heat pipe

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Low energy H atom analyzer using a cesium heat pipe

机译：使用铯热管的低能H原子分析仪

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The efficiency of detecting H and D atoms (E≪1 keV) escaping a plasma has been increased by use of a cesium vapor cell to form negative ions by electron attachment collisions. A 30 cm long heat pipe confines the cesium to a localized region. The resulting negative ions are energy analyzed with a single‐channel, parabolic parallel‐plate analyzer and detected by a channel multiplier. The H0 conversion efficiency was 10-2 at 100 eV, increasing to 3.8×10-2 at 500 eV. For a H0 energy of 100 eV, the analyzer is 2.5 orders of magnitude more efficient than a comparable N2 stripping cell analyzer. The analyzer has been used to measure ion temperatures as low as 30 eV on the EBT Plasma experiment.

机译：通过使用铯蒸气池通过电子附着碰撞形成负离子，提高了检测逃离等离子体的H和D原子（E≪1 keV）的效率。 30厘米长的热管将铯限制在局部区域。产生的负离子通过单通道抛物线平行板分析仪进行能量分析，并通过通道倍增器进行检测。 H0转换效率在100 eV时为10-2，在500 eV时增加到3.8×10-2。对于100 eV的H0能量，分析仪的效率要比同类N2剥离池分析仪高2.5个数量级。在EBT等离子体实验中，该分析仪已用于测量低至30 eV的离子温度。

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《Review of Scientific Instruments》 |1980年第4期|P.511-515|共5页
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Low energy H atom analyzer using a cesium heat pipe

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