TY - BOOK AU - Gaertner,Georg AU - Knapp,Wolfram AU - Forbes,Richard G. ED - SpringerLink (Online service) TI - Modern Developments in Vacuum Electron Sources T2 - Topics in Applied Physics, SN - 9783030472917 AV - T50 U1 - 530.8 23 PY - 2020/// CY - Cham PB - Springer International Publishing, Imprint: Springer KW - Physical measurements KW - Measurement    KW - Electronics KW - Microelectronics KW - Measurement Science and Instrumentation KW - Electronics and Microelectronics, Instrumentation N1 - Historical development and advanced new applications of vacuum electron sources -- State of the art and future perspectives of Scandate cathodes -- Review of impregnated and reservoir Ba dispenser cathodes -- New developments in Ba oxide cathodes -- Electron sources for medical X-ray tubes -- High brightness cathodes for high resolution electron beam applications -- Progress in field electron emission science -- Carbon-based field emitters, properties and applications -- Explosive electron emission of carbon based cathodes and applications -- Photocathodes N2 - This book gives an overview of modern cathodes and electron emitters for vacuum tubes and vacuum electron devices in general. It covers the latest developments in field emission theory as well as new methods towards improving thermionic and cold cathodes. It addresses thermionic cathodes, such as oxide cathodes, impregnated and scandate cathodes, as well as photocathodes and field emitters - the latter comprising carbon nanotubes, graphene and Spindt-type emitter arrays. Despite the rise and fall of the once dominant types of vacuum tubes, such as radio valves and cathode ray tubes, cathodes are continually being improved upon as new applications with increased demands arise, for example in electron beam lithography, high-power and high-frequency microwave tubes, terahertz imaging and electron sources for accelerators. Written by 17 experts in the field, the book presents the latest developments in cathodes needed for these applications, discussing the state of the art and addressing future trends UR - https://doi.org/10.1007/978-3-030-47291-7 ER -