The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The two major components, sheet beam electron gun and interaction circuit, consisting the 0.5 THz Smith-Purcell device under development are being investigated in separate diagnosis systems. The thermionic cathode showed the required emission current density of 50 A/cm2 and assembled into the electron gun. The interaction circuit fabricated by laser machining is being investigated using the precise...
The development of high current density sheet beam electron gun for Terahertz devices is carried-out. It operates at beam voltage of 12 kV and perveance 0.0136 mup to meet ours requirement of high beam current density 100 A/cm2 and low emittance 0.068 pi-mm-mrad at the beam-waist position. Currently, mentioned gun is being fabricated. Work has been initiated to test the performance of Scandate cathode...
To optimize the beam-wave interaction in a Smith-Purcell device, the characteristics such as dispersion and Q of surface mode existing on the one-dimensional array of rectangular holes were investigated. The dependence of such characteristic quantities on the structural parameters such as the width and depth of the hole was compared with the resulting beam-wave interaction.
A novel way of enhancing the Smith-Purcell radiation intensity by the use of counter-streaming electron beams and 1D slit array is introduced. The mechanism of the intensity enhancement is unveiled through numerical simulation. The experimental setup for 0.5 THz is being developed and the details of each part will be presented.
Smith-Purcell radiation from a grating structure modified in a cylindrical manner was considered to utilize a high power relativistic annular electron beam. The dimensions of the structure were optimized to the electron beam and the radiation was investigated using numerical simulations. The numerical simulation results are presented and analysed
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.