ABSTRACT:

In order to improve the emission performance and reliability of the oxide cathode for application in a microwave tube, an Ni–Re–Ir sponge reservoir oxide cathode has been developed and is presented in this paper. The emission current, the activity during lifetime, the emission uniformity, and the work function have been tested. The results show that the emission current of the cathode reaches 16 $ hbox{A/cm}^{2}$ with a 10-$muhbox{s}$ pulsewidth and a 1% duty cycle and that the emission current, after 3000-h lifetime at a temperature of 820 $^{circ}hbox{C} hbox{br}$, has decreased less than 5% with 1- $hbox{A/cm}^{2}$ direct current. The analysis and test results of the thermal electron spectrometer indicate that the emission uniformity of the cathode can be improved to ensure that more than 80% of the cathode work-function distribution is in the range of 1.44–1.5 eV. The cathode has been successfully used many times in a miniature grid-controlled pulsed travelling wave tube for the launch of a manned space craft and a communication satellite.


Did you like this research project?

To get this research project Guidelines, Training and Code... Click Here


PROJECT TITLE :Power Allocation Study for Non-Orthogonal Multiple Access Networks With Multicast-Unicast Transmission - 2018ABSTRACT:This Project considers a downlink single-cell non-orthogonal multiple access (NOMA) network,
PROJECT TITLE :A Comprehensive Study on Social Network Mental Disorders Detection via Online Social Media Mining - 2018ABSTRACT:The explosive growth in popularity of social networking ends up in the problematic usage. An increasing
PROJECT TITLE :Empirical Study of Face Authentication Systems Under OSNFD Attacks - 2018ABSTRACT:Face authentication has been widely available on smartphones, tablets, and laptops. As various personal pictures are published in
PROJECT TITLE :Comparative study of 16-order FIR filter design using different multiplication techniques - 2017ABSTRACT:This study represents planning and implementation of an occasional power and high speed sixteen order FIR
PROJECT TITLE :Study On Ofdm Frequency Offset Estimation Based On Emd Algorithm - 2017ABSTRACT:A new methodology of applying EMD (empirical mode decomposition) algorithm to appreciate the CFO (carrier frequency offset) estimation

Ready to Complete Your Academic MTech Project Work In Affordable Price ?

Project Enquiry