Igor Syratchev
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View article: The CLIC technology for an electron flash therapy facility
The CLIC technology for an electron flash therapy facility Open
The “FLASH”effect has emerged as a subject of significant interest in the field of radiation oncology due to its potential to improve the therapeutic index of radiotherapy. Over the past three decades, CERN has been advancing accelerator t…
View article: High-Power Test of Two Prototype X-Band Accelerating Structures Based on SwissFEL Fabrication Technology
High-Power Test of Two Prototype X-Band Accelerating Structures Based on SwissFEL Fabrication Technology Open
This article presents the design, construction, and high-power test of two $X$-band radio frequency (RF) accelerating structures built as part of a collaboration between CERN and the Paul Scherrer Institute (PSI) for the compact linear col…
View article: Ka-band linearizer structure studies for a compact light source
Ka-band linearizer structure studies for a compact light source Open
The CompactLight design for a next-generation x-ray free-electron laser utilizes a C-band injector. This requires that the harmonic system used to linearize the beam’s phase space must operate at X-band rf or higher. We investigate the opt…
View article: Design review
Design review Open
The objective of this work package is to design and build an industrial prototype of the LHC klystron -TH2167- klystron reaching 70% efficiency in collaboration with THALES. This report describes the status, the progress made and the next …
View article: RF system challenges for future $$\hbox {e}^+ \hbox {e}^-$$ circular colliders
RF system challenges for future $$\hbox {e}^+ \hbox {e}^-$$ circular colliders Open
The RF system is the centrepiece of any future circular lepton collider. In particular, the system is required to support the high intensity beams needed for pushing the luminosity at the lower energy regimes of future energy-frontier circ…
View article: Numerical Analysis of Resonant Multipolar Instabilities in High Power Klystrons
Numerical Analysis of Resonant Multipolar Instabilities in High Power Klystrons Open
The monopole monotron instability is a well-known phenomenon in linear beam devices. In recent development of a high-efficiency 50-MW X-band klystron, such instabilities were found and mitigated in a special second-harmonic multicell cavit…
View article: Development of 36 GHz RF Systems for RF Linearisers
Development of 36 GHz RF Systems for RF Linearisers Open
As part of the deign studies, the CompactLight project plans to use an injector in the C-band. Which constitutes a particular complication for the harmonic system in charge of linearising the beam’s phase space, since it means its operatio…
View article: High-Gradient Breakdown Studies of an X-Band Accelerating Structure Operated in the Reversed Taper Direction
High-Gradient Breakdown Studies of an X-Band Accelerating Structure Operated in the Reversed Taper Direction Open
The results of high-gradient tests of a tapered X-band traveling-wave accelerator structure powered in reversed direction are presented. Powering the tapered structure from the small aperture, normally output, at the end of the structure p…
View article: High-gradient behavior of a dipole-mode rf structure
High-gradient behavior of a dipole-mode rf structure Open
A normal-conducting, X-band traveling wave structure operating in the dipole mode has been systematically high-gradient tested to gain insight into the maximum possible gradients in these types of structure. Measured structure conditioning…
View article: High-gradient testing of an <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>S</mml:mi></mml:math>-band, normal-conducting low phase velocity accelerating structure
High-gradient testing of an -band, normal-conducting low phase velocity accelerating structure Open
A novel high-gradient accelerating structure with low phase velocity, v/c=0.38, has been designed, manufactured and high-power tested. The structure was designed and built using the methodology and technology developed for CLIC 100 MV/m hi…
View article: Applying Superconducting Magnet Technology for High-Efficiency Klystrons in Particle Accelerator RF Systems
Applying Superconducting Magnet Technology for High-Efficiency Klystrons in Particle Accelerator RF Systems Open
An M$_{g}$B$_{2}$ superconducting solenoid magnet has been developed for electron beam focusing in X-band (12 GHz) klystrons for particle accelerator RF systems, to provide a central field of 0.8 T at 57 A and at ≥ 20 K. It has successfull…
View article: Development of Prototype MGB<sub> 2 </sub> Superconducting Solenoid Magnet for High-Efficiency Klystron Applications
Development of Prototype MGB<sub> 2 </sub> Superconducting Solenoid Magnet for High-Efficiency Klystron Applications Open
A wind-and-react MgB 2 solenoid magnet for klystrons has been developed. While the current normal-conducting (Cu) magnet consumes 20 kW per magnet, this MgB$_2$ magnet consumes less than 3 kW in refrigerator power. The conduction-cooled ha…
View article: Demonstration of a cavity-based pulse compression system for pulse shape correction
Demonstration of a cavity-based pulse compression system for pulse shape correction Open
A compact X-band correction cavity chain (CC) has been successfully designed, fabricated and high power tested for the Compact Linear Collider (CLIC) project. The CC consists of eight spherical cavities and four polarizers, and each spheri…
View article: High Power Conditioning of X-Band Variable Power Splitter and Phase Shifter
High Power Conditioning of X-Band Variable Power Splitter and Phase Shifter Open
The three X-band test facilities currently at CERN aim at qualifying CLIC structures prototypes but are also exten- sively used to qualify X-band components operation at high power. In order to upgrade one of the facilities from a single t…
View article: Scaling Procedures and Post-Optimization for the Design of High-Efficiency Klystrons
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…
View article: KlyC. The 1D/1.5D large signal computer code for the klystron simulations. User manual.
KlyC. The 1D/1.5D large signal computer code for the klystron simulations. User manual. Open
Almost all the accurate and efficient 2D large-signal codes for the klystron simulations are proprietary and are not freely available to the wide klystron community. The klystron code KlyC1D/1.5D has been developed at CERN recently, as an …
View article: Dark Sector Physics with a Primary Electron Beam Facility at CERN
Dark Sector Physics with a Primary Electron Beam Facility at CERN Open
In this Expression of Interest, we propose a primary electron beam facility with the main motivations being (i) dark sector experiments, and (ii) to enable a suite of development projects in acceleration technology. We also present a detai…
View article: Construction and commissioning of the S-Band high gradient RF laboratory at IFIC
Construction and commissioning of the S-Band high gradient RF laboratory at IFIC Open
An S-Band High-Gradient (HG) Radio Frequency (RF) laboratory is under construction and commissioning at IFIC. The purpose of the laboratory is to perform investigations of high-gradient phenomena and to develop normal-conducting RF technol…
View article: Construction and Commissioning of the S-Band High-Gradient RF Laboratory at IFIC
Construction and Commissioning of the S-Band High-Gradient RF Laboratory at IFIC Open
An S-Band High-Gradient (HG) Radio Frequency (RF) laboratory is under construction and commissioning at IFIC. The purpose of the laboratory is to perform investigations of high-gradient phenomena and to develop normal-conducting RF technol…
View article: High Power and High Repetition Rate X-band Power Source Using Multiple Klystrons
High Power and High Repetition Rate X-band Power Source Using Multiple Klystrons Open
In July 2016, the first X-band test facility operating with two interwoven, 6 MW klystron pulses was commissioned at CERN. Outputting up to 46 MW after pulse compression, the new test stand allows testing of two structures concurrently wit…
View article: High Gradient Performance of an S-Band Backward Traveling Wave Accelerating Structure for Medical Hadron Therapy Accelerators
High Gradient Performance of an S-Band Backward Traveling Wave Accelerating Structure for Medical Hadron Therapy Accelerators Open
The high-gradient performance of an accelerating structure prototype for a medical proton linac is presented. The structure was designed and built using technology developed by the CLIC collaboration and the target application is the TULIP…
View article: Initial Testing of Techniques for Large Scale Rf Conditioning for the Compact Linear Collider
Initial Testing of Techniques for Large Scale Rf Conditioning for the Compact Linear Collider Open
Nominal operating conditions for the Compact Linear Collider (CLIC) 380 GeV requires 72 MV/m loaded accelerating gradients for a 180 ns flat-top pulse. Achieving this requires extensive RF conditioning which past tests have demonstrated ca…
View article: High Power Conditioning of X-Band RF Components
High Power Conditioning of X-Band RF Components Open
As part of the effort to qualify CLIC accelerating struc-tures prototypes, new X-band test facilities have been built and commissioned at CERN in the last years. In this context, a number of RF components have been designed and manufacture…
View article: rf design of a pulse compressor with correction cavity chain for klystron-based compact linear collider
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…
View article: Control and performance improvements of a pulse compressor in use for testing accelerating structures at high power
Control and performance improvements of a pulse compressor in use for testing accelerating structures at high power Open
New developments relating to compact X-band, SLED-I type pulse compressors being developed at CERN for testing high gradient structures are described. Pulse compressors of interest take rf pulses from one or more high power klystrons with …
View article: Design of a variable X-band RF power splitter
Design of a variable X-band RF power splitter Open
This work presents the design of a novel X-band RF power splitter for high-power consumption. The RF power division ratio is adjusted by mechanically changing the position of a special RF short circuit piston, which is mounted on a step-mo…
View article: High Efficiency Klystrons Using the COM Bunching Technique
High Efficiency Klystrons Using the COM Bunching Technique Open
Future large-scale particle accelerators, for example, the Future Circular Collider (FCC), the Compact Linear Collider (CLIC) and the International Linear Collider (ILC), will require significant RF drive power on the order of 100 MW. Thus…
View article: The CLIC Main Linac Module Updated Design
The CLIC Main Linac Module Updated Design Open
In 2016, CLIC implementation working groups have started their reflection on how to finalize the CLIC design work in the different areas of the project, aiming for a technical design and an overall implementation plan for CLIC being availa…
View article: Commissioning of XBox-3: A Very High Capacity X-band Test Stand
Commissioning of XBox-3: A Very High Capacity X-band Test Stand Open
The Compact Linear Collider (CLIC) beam-based acceleration baseline uses high-gradient travelling wave accelerating structures at a frequency of 12 GHz. In order to prove the performance of these structures at high peak power and short pul…