Klystron ≈ Klystron
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Updated baseline for a staged Compact Linear Collider Open
The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centr…
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Research progresses on Cherenkov and transit-time high-power microwave sources at NUDT Open
Research progresses on Cherenkov and transit-time high-power microwave (HPM) sources in National University of Defense Technology (NUDT) of China are presented. The research issues are focused on the following aspects. The pulse-shortening…
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Status of the SXFEL Facility Open
The Shanghai soft X-ray Free-Electron Laser facility (SXFEL) is being developed in two steps; the SXFEL test facility (SXFEL-TF), and the SXFEL user facility (SXFEL-UF). The SXFEL-TF is a critical development step towards the construction …
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Metamaterial-Inspired Vacuum Electron Devices and Accelerators Open
Metamaterials (MTMs) are structured materials with subwavelength features that can be engineered to have some unique properties not found in nature, such as negative refractive index, reversed Doppler effect, and reversed Cherenkov radiati…
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The Compact Linear Collider (CLIC) - Project Implementation Plan Open
The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear $e^+e^-$ collider under development by international collaborations hosted by CERN. This document provides an overview of the design, technology, and implementation a…
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Updated baseline for a staged Compact Linear Collider Open
The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e+e- collider under development. For an optimal exploitation of its physics potential, CLIC is foreseen to be built and operated in a staged approach with three centr…
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Experimental Demonstration of Enhanced Self-Amplified Spontaneous Emission by an Optical Klystron Open
We report the first experimental evidence of enhancement of self-amplified spontaneous emission, due to the use of an optical klystron. In this free-electron laser scheme, a relativistic electron beam passes through two undulators, separat…
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High gradient linac for proton therapy Open
Proposed for the first time almost 30 years ago, the research on radio frequency linacs for hadron therapy experienced a sparkling interest in the past decade. The different projects found a common ground on a relatively high rf operating …
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Broadband and high-power terahertz radiation source based on extended interaction klystron Open
Terahertz applications require high performance and high reliability terahertz radiation sources, especially the urgent demands of high output power and broad bandwidth. The extended interaction klystron (EIK) has the great potential to ge…
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Beam commissioning of the 35 MeV section in an intensity modulated proton linear accelerator for proton therapy Open
This paper presents the experimental results on the Terapia Oncologica con Protoni-Intensity Modulated Proton Linear Accelerator (TOP-IMPLART) beam that is currently accelerated up to 35 MeV, with a final target of 150 MeV. The TOP-IMPLART…
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The Compact Linear e$^+$e$^-$ Collider (CLIC): Accelerator and Detector Open
The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear e$^+$e$^-$ collider under development by international collaborations hosted by CERN. This document provides an overview of the design, technology, and implementation…
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Compact rf polarizer and its application to pulse compression systems Open
We present a novel method of reducing the footprint and increasing the efficiency of the modern multi-MW rf pulse compressor. This system utilizes a high power rf polarizer to couple two circular waveguide modes in quadrature to a single r…
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Introduction to Machine Protection Open
Protection of accelerator equipment is as old as accelerator technology and was for many years related to high-power equipment. Examples are the protection of powering equipment from overheating (magnets, power converters, high-current cab…
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The ELBE infrared and THz facility at Helmholtz-Zentrum Dresden-Rossendorf Open
The coherent infrared and THz sources driven by the superconducting electron accelerator ELBE are described. The present status of the facility is summarized and a few scientific highlights are mentioned. Finally plans for a successor faci…
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The high-power helicon program at DIII-D: gearing up for first experiments Open
Helicon current drive, also called fast wave current drive in the lower hybrid range of frequencies, has long been regarded as a promising current drive tool for reactor grade plasmas. A newly installed MW-level system at DIII-D will be th…
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Performance of MgB<sub>2</sub> Superconductor Developed for High-Efficiency Klystron Applications Open
An 8-km long MgB$_{2}$ wire for a prototype klystron magnet was made and evaluated. The wire was made by a typical in situ method; it has 10 filaments and 0.67 mm in outer diameter. The homogeneity of I $_{c}$ of this wire was evaluated by …
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Hybrid design optimization of high voltage pulse transformers for Klystron modulators Open
This paper presents a hybrid optimization methodology for the design of high voltage pulse transformers used in klystron modulators. The optimization process is using simplified 2D FEA design models of the 3D transformer structure. Each in…
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rf design of a pulse compressor with correction cavity chain for klystron-based compact linear collider Open
We present an X-band high-power pulse compression system for a klystron-based compact linear collider. In this system design, one rf power unit comprises two klystrons, a correction cavity chain, and two SLAC Energy Doubler (SLED)-type X-b…
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Periodic atomization characteristics of simplex swirl injector induced by klystron effect Open
The atomization dynamic characteristics of a simplex swirl injector was investigated experimentally by using a hydrodynamic mechanical pulsator and the shadow photography technique. The frequency response characteristics of the fluid film …
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High-Speed Data Processing Module for LLRF Open
Linear accelerators, like the Free-electron LASer in Hamburg (FLASH) or the European X-Ray Free Electron Laser (E-XFEL) take advantage of the digital Low Level Radio Frequency (LLRF) system to control the phase and amplitude of an electrom…
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Low-emittance thermionic-gun-based injector for a compact free-electron laser Open
A low-emittance thermionic-gun-based injector was developed for the x-ray free-electron laser (XFEL) facility known as the SPring-8 angstrom compact free-electron laser (SACLA). The thermionic-gun-based system has the advantages of maintai…
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Scaling Procedures and Post-Optimization for the Design of High-Efficiency Klystrons Open
A semianalytical parametric scaling procedure (PSP) for klystron design has been developed. The PSP allows existing klystron designs to be scaled to different operating frequencies, beam power, and perveance, while maintaining the electron…
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A Millimeter-Wave Klystron Upconverter With a Higher Order Mode Output Cavity Open
Manufacturing of klystrons in the millimeter-wave frequency range is challenging due to the small size of the cavities and the ratio of the maximum gap voltage to the beam energy. The small dimensions also make difficult to produce devices…
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Optical Klystron Enhancement to Self Amplified Spontaneous Emission at FERMI Open
The optical klystron enhancement to a self-amplified spontaneous emission free electron laser has been studied in theory and in simulations and has been experimentally demonstrated on a single-pass high-gain free electron laser, the FERMI F…
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Method of Macrosteps for Multiple Parameter Global Optimization of Powerful Klystrons Open
Том 1 № 1 2015 Журнал основан в 2013 году, выходит 2 раза в год ГЛАВНЫЕ РЕДАКТОРЫ: В. В. Жиков (Россия), Р. Наталини (Италия) ЗАМ.ГЛАВНОГО РЕДАКТОРА: О. А. Матевосян (Россия, Франция) ОТВЕТСТВЕННЫЙ СЕКРЕТАРЬ: М. Д. Сурначёв (Россия) РЕДАКЦ…
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High power X-band RF test stand development and high power testing of the CLIC crab cavity Open
This thesis describes the development and operation of multiple high power X-band RF test facilities for high gradient acceleration and deflecting structures at CERN, as re-quired for the e+ e- collider research programme CLIC (Compact Lin…
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Superconducting CH-cavity heavy ion beam testing at GSI Open
Recently the first section of a standalone superconducting (sc) continuous wave (cw) heavy ion Linac as a demonstration of the capability of 217 MHz multi gap Crossbar H-mode structures (CH) has been commissioned and extensively tested wit…
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A 0.3 THz Multi-Beam Extended Interaction Klystron Based on TM<sub>10,1,0</sub> Mode Coaxial Coupled Cavity Open
A new conceive of high-order mode multi-beam Extended interaction Klystron (EIK) at the terahertz (THz) band is proposed. The interaction circuit based on the coaxial coupled cavity at mode is designed and analyzed. Benefiting from the la…
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History of EISCAT – Part 4: On the German contribution to the early years of EISCAT Open
The decision of the Max Planck Society (MPG) to get involved in the establishment of an incoherent scatter radar in northern Europe was intimately linked to the future of the Max Planck Institute for Aeronomy (MPAe) in Katlenburg-Lindau. D…
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High gradient off-axis coupled C-band Cu and CuAg accelerating structures Open
We report the high gradient testing results of two single-cell off-axis coupled standing wave accelerating structures. Two brazed standing wave off-axis coupled structures with the same geometry were tested: one made of pure copper (Cu) an…