The twenty-sixth International Vacuum Electronics Conference, IVEC 2025, is an event organized and sponsored by the European Space Agency (ESA) with the technical co-sponsorship of the IEEE Electron Devices Society (EDS). The conference will be held on 14 to 17 April 2025 at the Hilton Hotel in Rotterdam, The Netherlands. IVEC was originally created in 2000 by merging the US Power Tubes conferences and the European Space Agency TWTA Workshops, and has since then expanded into a fully international conference. You can learn more about IVEC by visiting the IEEE EDS Vacuum Electronics Technical Committee (VETC) website. IVEC 2025 aims at being an international forum of information and technical discussion between the various players in the field of vacuum electronics: designers, researchers, young and experienced engineers, scientists, device users, manufacturers, operators, government/institutions, academics and of course, our valuable students. We invite you to submit papers with the results of your latest work and experiences in the field of vacuum electronics. Submissions from all groups are highly encouraged and appreciated. IVEC 2025 will provide a unique place for the exchange of scientific and technical information and will foster collaboration and cooperation in the vacuum electronics domain both at European and worldwide level. A highlight of IVEC 2025 will be the introduction of a special session, focused on electric propulsion systems for space applications. IVEC 2025 is the ideal forum to present and discuss the promising research from this field with the wider vacuum electronics community. As is customary at IVEC, the John R. Pierce Award for Excellence in Vacuum Electronics, the Vacuum Electronics Young Scientist Award and the Best Student Paper Award will be presented. The Conference will also be complemented with a varied and interesting social program, details of which will be posted on the IVEC 2025 website in the months to come. As in past conferences, the technical meeting and social events will provide a unique opportunity to renew friendships with colleagues and friends, interact with customers, and meet students. We look forward to welcoming you to IVEC 2025! TOPiCS Vacuum Electron Devices Key Components, Tools, Technologies Systems and Subsystems Traveling-wave tubes (all types) Crossed-field devices (oscillators and amplifiers) Klystrons Spatially distributed electron beam devices Inductive output tubes Fast-wave devices (gyrotrons, gyro-amplifiers) Free electron lasers and masers mm-Wave and Terahertz amplifiers and oscillators Pulse compression devices Plasma filled amplifiers and oscillators High power microwave devices / RF directed energy Triodes, tetrodes and pentodes Power switches Plasma devices and thrusters Key components (e.g. guns, circuits, windows, collectors) Materials (e.g. dielectric and magnetic materials, coatings) Metamaterial designs Analysis and computer modelling Simulation/design tools Machine Learning tools RF breakdown Linearity, intermodulation and noise Thermal power management and control Components/devices miniaturization Manufacturing technologies (e.g. additive manufacturing) Measurement techniques and diagnostics Sensors and detectors Microwave and mm-Wave power modules Linearizers Electronic power conditioners, modulators, and supplies Vacuum components and systems Amplifier and antenna interfaces Device and system integration System performance and reliability Emitter/Cathode Technologies and Emission Physics Applications Thermionic emitters Non-thermionic emitters (e.g. photocathodes, secondary emitters) Field emitters/arrays Materials and technologies Cathode design, fabrication and characterization Accelerator emission physics (breakdown, halo, emittance) Defense Radar EMC Telecommunications Medicine and industry Particle accelerators Nuclear fusion RF interference Instruments and lithography Materials processing Displays Electric Propulsion Awards John R. Pierce Award for Excellence in Vacuum Electronics Nominations are solicited for the 2025 John R. Pierce Award for Excellence in Vacuum Electronics. The award (formerly, IVEC Award for Excellence in Vacuum Electronics) was established in 2002 to recognize outstanding contributions to the field. Anyone or any group of persons working in the field of vacuum electronics is eligible for this award. Any member of the vacuum electronics community may submit a nomination as described at the John R. Pierce Award page on the Vacuum Electronics website. Vacuum Electronics Young Scientist Award The Vacuum Electronics Young Scientist Award is aimed to recognize outstanding contributions from early career researchers and young professionals in the field of Vacuum Electronics. This award recognizes technical achievements, leadership in service, education, innovation and entrepreneurship. Any member of the vacuum electronics community may submit a nomination as described at the Vacuum Electronics Young Scientist Award page on the Vacuum Electronics website. Best Student Paper Award IVEC 2025 will select the most outstanding, student-authored and presented paper for the honour of “Best Student Paper Award.” Criteria for eligible papers include those with a student as the principal author and presenter. Students are considered as individuals pursuing a baccalaureate or graduate degree at the time of the conference, or during the past year when the work was completed. Following ranking by the Technical Program Committee, six student papers will be selected for finalist consideration. Finalist students will present a 10-minute synopsis talk on their work during the conference. A winner will be selected from these brief summary talks. The award will include an engraved plaque along with a $500 check. Past recipients of this award are listed on the Best Student Paper Award page on the Vacuum Electronics website.