A test diode of 10 kW CW Magnetrons was fabricated and mounted on the ultra-high vacuum (UHV) station for vacuum processing (Fig. 1a). Complete ovening and baking of the tube have been performed with a vacuum of the order of 10-9Torr along with the cathode activation. The emission from the cathode has been attained by applying [...]

Study of free space calibration techniques, Analysis of Gaussian mode generation by corrugated a horn, and Simulation and experimental evaluation of reflection properties of 170GHz alumina window has been carried out (Fig.1). Fig. 1: (a) Gaussian mode generation by corrugated horn (b) Free Space Test Setup for RF window (c) Characterization Response of Alumina window

CSIR-CEERI has been working on design and development dispenser cathodes under CSIR Network project. The design of dispenser cathode required for J-band klystron with 3.0 mm button diameter has been completed (Fig. 1). Fabrication procedure has been established with several repetitions. Emission current densities up to 30 A/cm2 achieved in CW diode configuration. Fig. 2 shows [...]

A demountable version of X-band plasmaassisted slow-wave oscillator prototype was designed and developed (Fig. 1). It consists of a TMGMA PCE-Gun along with a rippled wall SWS with optimised design and a vacuum-sealed conical horn Fig. 1: X-band plasma-assisted slow-wave oscillator Fig. 2: (a) X-band microwave signal: 10-11.7 GHz generated from the TMGMA PCE-Gun based plasma [...]

The linear aperture radial multichannel Pseudospark switch (LARM-PSS) was demonstrated for high current switching without any trade-off with a hold-off voltage under pulse operation. The width, length and number of the linear apertures used in the interfacing electrodes of the cathode and anode sub-assemblies were optimised. The linear apertures at the place of round hole apertures [...]

A double gap sealed-off 40 kV/5 kA pseudospark switch (PSS) was assembled and leak tested as shown in Fig. 1. Vacuum processing of the PSS was completed. It has been holding ultra high vacuum better than ~10-8 mbar in the processing station. Conditioning was carried out for an individual gap and for double gap assembly of [...]

A smart interface prototype system was developed (Fig. 1) to detect presence as well as the strength of CO2, CO, NH3, NxOy, methane, butane, alcohol, LPG gases including fumes/smell in air or in a chamber. Output would be displayed on LCD bar for indication of air quality or gas pollution level in the air for low, [...]

First prototype of the pH meter was developed and tested (Fig 1). Specifications of the pH meter: pH range: 1-14 pH Resolution: 0.1 pH Auto calibration facility Auto Temperature compensation Affordable, Compact and portable System Battery operated system Fig. 1: Prototype of pH meter using commercial ISFET