Local pressure in the proximity of a field emitter
Local pressure in the proximity of a field emitter
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场发射器附近的局部压力
DOI：
10.1116/1.1829063
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
B. Zajec
中科院分区：
文献类型：
--
作者：
M. Žumer;V. Nemanič;B. Zajec
场发射体的基本特性通常在配备适当泵的标准特高压室中实现。它们的高抽速和真空表的远程位置阻止了在现场发射器运行期间监测小的压力变化。在大多数潜在的应用中，磁场发射器应该在一个小的密封装置中运行，在那里，局部压力通常是未知的，其对装置寿命的影响往往被低估。制备了一个装有微型离子吸附剂（IG）泵、旋转转子计（SRG）和阴极发光屏的小玻璃包膜，研究了场发射体对残余大气的影响。这是通过微型IG泵的放电电流来监测的，之前由SRG在现场校准。单晶纳米颗粒沉积在钼针上作为场发射体。除气井包层的初始压力在UHV范围内，但其增加了近10年。
A basic characterization of field emitters is usually realized in a standard UHV chamber equipped with appropriate pumps. Their high pumping speed and the remote location of the vacuum gauge prevents the monitoring of small pressure changes during the operation of a field emitter. In most potential applications, the field emitter is supposed to run in a small sealed device, where the local pressure is frequently unknown and its influence on the device’s lifetime is often underestimated. A small glass envelope equipped with a miniature ion-getter (IG) pump, spinning rotor gauge (SRG), and a cathodoluminescent screen, was prepared to study the influence of the field emitter on the residual atmosphere. This was monitored via the discharge current of the miniature IG pump, previously calibrated in situ by the SRG. Single-crystalline nanoparticles deposited onto molybdenum needles were used as field emitters. The initial pressure in a well outgassed envelope was in the UHV range, but its increase for almost th...