High Reliability, >10A/cm2, Long-Life, Dispenser Cathodes for Space Applications with Multi-Year In-Orbit Data from the Cloud Sat Mission

被引：0

作者：

Green, M. C. ^{[1
]}

Roitman, A. ^{[2
]}

Steer, B. ^{[2
]}

Cattelino, M. J. ^{[3
]}

Miram, G. V. ^{[4
]}

Im, E. ^{[5
]}

Tanelli, S. ^{[5
]}

机构：

[1] Varian Med Syst, Mountain View, CA 94043 USA

[2] CPI, Millimeter Wave Prod, Georgetown L7G 2J4, Guyana

[3] CPI, Microwave Power Prod, Palo Alto, CA 94303 USA

[4] Consultant, Atherton, CA 94027 USA

[5] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

来源：

2009 IEEE INTERNATIONAL VACUUM ELECTRONICS CONFERENCE | 2009年

关键词：

D O I：

10.1109/IVELEC.2009.5193412

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper describes the dispenser cathode technology and cathode life testing at high current density that together underpin the design of a W-band 2kW Extended Interaction Klystron developed for the nadir-pointing 94Ghz radar of the CloudSat Earth Observation satellite. The cathode operates at an emission current density of 11.3 Amps/cm(2) and, prior to launch, a 99% confidence level of meeting the mission goal of 22,500 hours operating life in orbit was required. The measured performance of the EIK amplifier in orbit is reported together with examples of cloud profiles obtained by the radar. The EIK life model has been validated and, based on the flawless performance of the radar in orbit and the high data yield, the mission has been extended from 2 years to 5.

引用

页码：292 / +

页数：2

High Reliability, &gt;10A/cm2, Long-Life, Dispenser Cathodes for Space Applications with Multi-Year In-Orbit Data from the Cloud Sat Mission

High Reliability, >10A/cm2, Long-Life, Dispenser Cathodes for Space Applications with Multi-Year In-Orbit Data from the Cloud Sat Mission