I. V. Konoplev
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View article: Sub-THz and THz Cherenkov radiation source with two-dimensional periodic surface lattice and multistage depressed collector
Sub-THz and THz Cherenkov radiation source with two-dimensional periodic surface lattice and multistage depressed collector Open
We present the theory, concept and design of an efficient, megawatt coherent Cherenkov radiation source based on a two-dimensional periodic surface lattice (2D-PSL) cavity combined with a novel energy recovery system for the generation of …
View article: All-metal wakefield accelerator: Two-dimensional periodic surface lattices for charged particle acceleration
All-metal wakefield accelerator: Two-dimensional periodic surface lattices for charged particle acceleration Open
Interest in “all-metal” surface periodic structures to control charged particle beam dynamics and properties, and to generate coherent radiation in the THz frequency range has recently risen exponentially. While such structures have the be…
View article: 1972713
1972713 Open
Energy-frontier particle accelerators are among the most exciting, complex, challenging, and expensive research instruments performing high precision measurements confirming the fundamentals of the physics and broadening new research horiz…
View article: Concept of circular-linear energy recovery accelerator to probe the energy frontier
Concept of circular-linear energy recovery accelerator to probe the energy frontier Open
Energy-frontier accelerators provide powerful tools performing high precision measurements confirming the fundamentals of the physics and broadening new research horizons. Such machines are either driven by circular or linear accelerators.…
View article: Novel Concept of Circular-Linear Energy Recovery Accelerator to Probe the Energy Frontier
Novel Concept of Circular-Linear Energy Recovery Accelerator to Probe the Energy Frontier Open
Energy-frontier accelerators provide powerful tools performing high precision measurements confirming the fundamental of the physics and broadening new research horizons. Such machines are either driven by circular or linear accelerators. …
View article: Single shot, nondestructive monitor for longitudinal subpicosecond bunch profile measurements with femtosecond resolution
Single shot, nondestructive monitor for longitudinal subpicosecond bunch profile measurements with femtosecond resolution Open
Accurate knowledge of the charged particle bunch longitudinal (time) profile is important in the context of wakefield accelerators, Compton Light sources, x-ray SASE FELs and THz radiation sources. However, it is still a challenge to obtai…
View article: Ultimate energy recovery from spent relativistic electron beam in energy recovery linear accelerators
Ultimate energy recovery from spent relativistic electron beam in energy recovery linear accelerators Open
Energy recovery linear accelerators (ERLs) rely upon single-axis superconducting radio frequency (SRF) cavities to be an efficient source of relativistic electrons for high energy and nuclear physics. SRF cavities are also considered relev…
View article: Electromagnetic Design of a Superconducting dual axis Spoke Cavity*
Electromagnetic Design of a Superconducting dual axis Spoke Cavity* Open
Dual axis superconducting spoke cavity for Energy Recovery Linac application is proposed. Conceptual design of the cavity is shown and preliminary optimiza-tions of the proposed structure have been carried out to minimize the ratio of the …
View article: Resonant Excitation of Volume and Surface Fields on Complex Electrodynamic Surfaces
Resonant Excitation of Volume and Surface Fields on Complex Electrodynamic Surfaces Open
Analytical, numerical, and experimental studies of volume and surface-field coupling in planar metal periodic surface lattice (PSL) structures superimposed on dielectric substrates with a metallic backing (PSLDM) are presented. We show the…
View article: Collaborative Strategies for Meeting the Global Need for Cancer Radiation Therapy Treatment Systems
Collaborative Strategies for Meeting the Global Need for Cancer Radiation Therapy Treatment Systems Open
The idea of designing affordable equipment and developing sustainable infrastructures for delivering radiation treatment for patients with cancer in countries that lack resources and expertise stimulated a first International Cancer Expert…
View article: Optimization of Dual Axis Asymmetric Cavity for Energy Recovery Linac
Optimization of Dual Axis Asymmetric Cavity for Energy Recovery Linac Open
Optimization of the dual axis asymmetric cavity was performed to minimize the ratio of the peak magnetic and electric fields values to the accelerating voltage, to increase the distance between operating and neighbouring modes as well as t…
View article: Experimental studies of 7-cell dual axis asymmetric cavity for energy recovery linac
Experimental studies of 7-cell dual axis asymmetric cavity for energy recovery linac Open
High average current, transportable energy recovery linacs (ERLs) can be very\nattractive tools for a number of applications including next generation\nhigh-luminosity, compact light sources. Conventional ERLs are based on an\nelectron bea…
View article: Non-destructive measurement and monitoring of separation of charged particle micro-bunches
Non-destructive measurement and monitoring of separation of charged particle micro-bunches Open
Micro-bunched particle beams are used for a wide range of research including wakefield-based particle acceleration and tunable sources of radiation. In all applications, accurate and non-destructive monitoring of the bunch-to-bunch separat…
View article: Novel Grating Designs for a Single-Shot Smith-Purcell Bunch Profile Monitor
Novel Grating Designs for a Single-Shot Smith-Purcell Bunch Profile Monitor Open
Smith-Purcell radiation has been successfully used to perform longitudinal profile measurements of electron bunches with sub-ps lengths. These measurements require radiation to be generated from a series of gratings to cover a sufficient f…
View article: Compact, energy efficient superconducting asymmetric ERL for ultra-high fluxes of X-ray and THz
Compact, energy efficient superconducting asymmetric ERL for ultra-high fluxes of X-ray and THz Open
To make the light sources compact and energy efficient, an energy recovery Superconducting RF LINAC can be used. We suggest a dual-axis, asymmetric cavity instead of conventional single axis, symmetric cavity configurations to generate ave…
View article: Non-Destructive Measurement of Electron Microbunch Separation
Non-Destructive Measurement of Electron Microbunch Separation Open
With the development of femtosecond lasers, the generation of micro-bunched beams directly from a photocathode becomes routine; however, the monitoring of the separation is still a challenge. We present the results of proof-of-principle ex…
View article: The Design of a Non-Destructive Single-Shot Longitudinal Bunch Profile Monitor using Smith-Purcell Radiation
The Design of a Non-Destructive Single-Shot Longitudinal Bunch Profile Monitor using Smith-Purcell Radiation Open
The conceptual design for a single-shot longitudinal bunch profile monitor using coherent Smith-Purcell radiation (cSPr) has recently been completed. The exploitation of the directionality and the polarization of cSPr to reduce the length …
View article: Novel Approach to the Elimination of Background Radiation in a Single-Shot Longitudinal Beam Profile Monitor
Novel Approach to the Elimination of Background Radiation in a Single-Shot Longitudinal Beam Profile Monitor Open
It is proposed to use the polarization of coherent Smith-Purcell radiation (cSPr) to distinguish between the cSPr signal and background radiation in a single-shot longitudinal bunch profile monitor. A preliminary measurement of the polariz…
View article: Conceptual design of non-destructive, time profile monitor for femtosecond-long electron bunches
Conceptual design of non-destructive, time profile monitor for femtosecond-long electron bunches Open
The main objective of the project is to build a high resolution time-profile monitor for femtosecond electron beams, based on the spectral analysis of coherent Smith-Purcell radiation (cSPr). The monitor will be capable of determining the …
View article: Concept of a staged FEL enabled by fast synchrotron radiation cooling of laser-plasma accelerated beam by solenoidal magnetic fields in plasma bubble
Concept of a staged FEL enabled by fast synchrotron radiation cooling of laser-plasma accelerated beam by solenoidal magnetic fields in plasma bubble Open
A novel method for generating GigaGauss solenoidal field in laser-plasma\nbubble, using screw-shaped laser pulses, has been recently presented in\narXiv:1604.01259 [physics.plasm-ph]. Such magnetic fields enable fast\nsynchrotron radiation…
View article: Experimental Studies of Asymmetric Dual Axis Cavity for Energy Recovery LINAC
Experimental Studies of Asymmetric Dual Axis Cavity for Energy Recovery LINAC Open
Increasing the beam charge and repetition rate leads to appearance of beam break-up instabilities in conventional ERLs. At this stage the highest current, from the SRF ERL, is around 300mA. A single turn, dual axis, compact Asymmetric Ener…
View article: GigaGauss magnetic fields in under-dense plasma
GigaGauss magnetic fields in under-dense plasma Open
Magnetic fields have a crucial role in physics at all scales, from astrophysics to nanoscale phenomena. Large fields, constant or pulsed, allow investigation of material in extreme conditions, opening up plethora of practical applications …
View article: Electron bunch profile reconstruction based on phase-constrained iterative algorithm
Electron bunch profile reconstruction based on phase-constrained iterative algorithm Open
The phase retrieval problem occurs in a number of areas in physics and is the subject of continuing investigation. The one-dimensional case, e.g., the reconstruction of the temporal profile of a charged particle bunch, is particularly chal…
View article: Studies of Ultimate Intensity Limits for High Power Proton Linacs
Studies of Ultimate Intensity Limits for High Power Proton Linacs Open
Although modern high power proton machines can now routinely deliver MW level operating powers, the next generation accelerators will be required to reach powers orders of magnitude higher. Significant developments will be needed both in t…
View article: Asymmetric dual axis energy recovery linac for ultrahigh flux sources of coherent x-ray and THz radiation: Investigations towards its ultimate performance
Asymmetric dual axis energy recovery linac for ultrahigh flux sources of coherent x-ray and THz radiation: Investigations towards its ultimate performance Open
In order for sources of coherent high brightness and intensity THz and x-ray radiation to be accepted by university or industrial R&D; laboratories, truly compact, high current and efficient particle accelerators are required. The dema…
View article: A Novel Approach in the One-Dimensional Phase Retrieval Problem and its Application to the Time Profile Reconstruction
A Novel Approach in the One-Dimensional Phase Retrieval Problem and its Application to the Time Profile Reconstruction Open
Accurate knowledge of the longitudinal profile of the bunch is important in the context of linear colliders, wake-field accelerators and for the next generation of light sources. As a result the non-destructive, single-shot evaluation of t…
View article: UH-FLUX: Compact, Energy Efficient Superconducting Asymmetric Energy Recovery LINAC for Ultra-high Fluxes of X-ray and THz Radiation
UH-FLUX: Compact, Energy Efficient Superconducting Asymmetric Energy Recovery LINAC for Ultra-high Fluxes of X-ray and THz Radiation Open
The conventional ERLs have limited peak beam current because increasing the beam charge and repetition rate leads to appearance of the beam break-up instabilities. At this stage the highest current, from the SRF ERL, is around 300 mA. A si…