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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research >Development of an RF coaxial resonator for investigating multipactor discharges on metal and dielectric surfaces
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Development of an RF coaxial resonator for investigating multipactor discharges on metal and dielectric surfaces

机译：射频同轴谐振器的开发，用于研究金属和介电表面上的多极放电

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摘要

Multipactor discharge is a phenomenon in which electrons impact one or more material surfaces in resonance with an alternating electric field. The discharge can occur for a wide range of frequencies, from the MHz range to tens of GHz, and in wide array of geometries if the impacted surface has a secondary electron emission (SEE) yield larger than one. The discharge can take place on a single surface or between two surfaces. A novel coaxial resonator to investigate two-surface multipactor discharges on metal and dielectric surfaces in the gap region under high vacuum (HV) conditions (10(-8) mbar) has been developed and tested at LAL. The RF coaxial resonator is similar to 19 cm in length with an outer diameter of 11 cm. A pulsed RF source delivers up to 30 W average power over a wide frequency range 650-900 MHz to the RF resonator. The incident and reflected RF signals are monitored by calibrated RF diodes. An electron probe provides temporal measurements of the multipacting electron current with respect to the RF power. These experiments were successful in identifying multipacting and allowed us the evaluation of a home made sputtered titanium nitride (TiN) thin layers as a Multipactor suppressor.
机译：多重放电是一种现象，其中电子在交变电场的共振下撞击一个或多个材料表面。如果受影响的表面的二次电子发射（SEE）产量大于1，则放电可能发生在从MHz到几十GHz的各种频率范围内，并且几何形状也很宽。放电可以在单个表面上或两个表面之间进行。在LAL上开发并测试了一种新颖的同轴谐振器，用于研究间隙在高真空（HV）条件（10（-8）mbar）下的金属和介电表面上的金属和介电表面上的两表面多极放电。 RF同轴谐振器的长度类似于19厘米，外径为11厘米。脉冲RF源在650-900 MHz的宽频率范围内向RF谐振器提供高达30 W的平均功率。入射和反射的RF信号由校准的RF二极管监控。电子探针提供相对于RF功率的多点电子电流的时间测量。这些实验成功地确定了多步抑制，使我们能够评估作为多步抑制器的自制溅射氮化钛（TiN）薄层。

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