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Smoothing of the slowly extracted coasting beam from a synchrotronApr 19 2019Slow extraction of beam from synchrotrons or storage rings as required by many fixed target experiments is performed by controlled excitation and feeding of a structural lattice resonance. Due to the sensitive nature of this resonant extraction process, ... More

The SAS Gamma-Ray SpectrometerApr 17 2019A new type of compact high-resolution gamma-ray spectrometer for short pulse intense gamma-rays has been developed by combining the principles of scintillators and attenuation spectrometers. The first prototype of this scintillator attenuation spectrometer ... More

Increasing charge lifetime in DC polarized electron guns by offsetting the anodeApr 17 2019Charge lifetime of strained superlattice GaAs photocathodes in DC guns is limited by ion back bombardment. It needs to be improved at least an order of magnitude to meet the requirements for future colliders such as Electron-Ion Collider (EIC). In this ... More

Bayesian Approach for Linear Optics CorrectionApr 17 2019With a Bayesian approach, the linear optics correction algorithm for storage rings is revisited. Starting from the Bayes' theorem, a complete linear optics model is simplified as "likelihood functions" and "prior probability distributions". Under some ... More

On solving the Thomas Bargman-Michel-Telegdi equation using the Bogoliubov Krylov method of averages and the calculation of the Berry phasesApr 16 2019Several proposals aimed at measuring the Electric Dipole Moment (EDM) for charged particles require very precise simulations and understanding of the systematic errors that can contribute to a spin buildup mimicking the EDM signal to be detected. In what ... More

Improving inverse Compton by removing non-linearitiesApr 15 2019We present a new, more nuanced understanding of non-linear effects in inverse Compton sources. Contrary to what has been heretofore understood, deleterious non-linear effects can arise even at low laser intensities, a regime previously viewed as linear. ... More

Fluxon-induced losses in niobium thin-film cavities revisitedApr 15 2019Long standing data from niobium thin film accelerating cavities will be revisited and analyzed by the two-fluid model of RF superconductivity. Firstly, the applicability and limitation of this model are explored using data of the BCS surface resistance ... More

Commissioning and operation of the Cherenkov detector for proton Flux Measurement of the UA9 ExperimentApr 12 2019The UA9 Experiment at CERN-SPS investigates channeling processes in bent silicon crystals with the aim to manipulate hadron beams. Monitoring and characterization of channeled beams in the high energy accelerators environment ideally requires in-vacuum ... More

Traveling wave method for simulating geometric beam coupling impedance of a beamscreen with pumping holesApr 12 2019In particle accelerators, pumping holes in a vacuum chamber can be a source of unwanted broadband coupling impedance, leading to beam instabilities. Analytical methods have been previously developed to estimate the impedance of holes in circular-like ... More

Analysis of beam position monitor requirements with Bayesian Gaussian regressionApr 11 2019With a Bayesian Gaussian regression approach, a systematic method for analyzing a storage ring's beam position monitor (BPM) system requirements has been developed. The ultimate performance of a ring-based accelerator, based on brightness or luminosity, ... More

Analysis of beam position monitor requirements with Bayesian Gaussian regressionApr 11 2019Apr 15 2019With a Bayesian Gaussian regression approach, a systematic method for analyzing a storage ring's beam position monitor (BPM) system requirements has been developed. The ultimate performance of a ring-based accelerator, based on brightness or luminosity, ... More

Highly efficient isotope separation and ion implantation of $^{163}$Ho for the ECHo projectApr 11 2019The effective electron neutrino mass measurement at the ECHo experiment requires high purity $^{163}$Ho, which is ion implanted into detector absorbers. To meet the project specifications in efficiency and purity, the entire process chain of ionization, ... More

Radiation of a Charge in Dielectric Concentrator for Cherenkov Radiation: Off-Axis Charge MotionApr 10 2019A theoretical investigation of radiation field produced by a charge moving through the dielectric concentrator for Cherenkov radiation is performed for the general case where a charge trajectory is shifted with respect to the target axis. The idea of ... More

An efficient solution for accelerating very high intensity beams in the low and medium energy regimeApr 10 2019Taking advantage of the 0{\deg} synchronous phase, the KONUS ("Combined 0{\deg} Structure" translated from German "Kombinierte Null Grad Struktur") beam dynamics strategy enables long accelerating sections with lens-free slim drift tubes in the low and ... More

A method for computing driving and detuning beam coupling impedances of an asymmetric cavity using eigenmode simulationsApr 09 2019We propose a method for numerical calculation of driving and detuning transverse beam coupling impedances of an asymmetric cavity. The method relies on eigenmode simulations and can be viewed as an alternative to time domain wakefield simulations. A similar ... More

Energy and RF Cavity Phase Symmetry Enforcement in Multi-turn ERL ModelsApr 08 2019In a multi-pass Energy Recovery Linac (ERL), each cavity must regain all energy expended from beam acceleration during beam deceleration, and the beam should achieve specific energy targets during each loop that returns it to the linac. For full energy ... More

Ion Acceleration in Laser Generated Mega Tesla Magnetic VortexApr 05 2019Magnetic Vortex Acceleration (MVA) from near critical density targets is one of the promising schemes of laser-driven ion acceleration. 3D particle-in-cell simulations are used to explore a more extensive laser-target parameter space than previously reported ... More

Energy and Flavor Discrimination Using Precision Time Structure in On-Axis Neutrino BeamsApr 02 2019We propose to use a higher-frequency RF bunch structure for the primary proton beam on target and precision timing to select different energy and flavor spectra from a wide-band neutrino beam, based on the relative arrival times of the neutrinos with ... More

Refined betatron tune measurements by mixing beam position dataMar 30 2019Apr 12 2019The measurement of the betatron tunes in a circular accelerator is of paramount importance due to their impact on beam dynamics. The resolution of the these measurements, when using turn by turn (TbT) data from beam position monitors (BPMs), is greatly ... More

Nitrogen Contamination Causes High Field Q-Slope (HFQS) in Buffered Chemical Polished SRF CavitiesMar 30 2019Buffered Chemical Polishing (BCP) was the most conventional polishing method for superconducting radio frequency (SRF) Niobium (Nb) cavity surface preparation before the discovery of Electropolishing (EP), which is superior to BCP in high gradient performance. ... More

Knife-edge based measurement of the 4D transverse phase space of electron beams with picometer-scale emittanceMar 29 2019Precise manipulation of high brightness electron beams requires detailed knowledge of the particle phase space shape and evolution. As ultrafast electron pulses become brighter, new operational regimes become accessible with emittance values in the picometer ... More

Rapid-Cycling Synchrotron for Multi-Megawatt Proton Facility at FermilabMar 29 2019The Fermilab accelerator complex delivers intense high-energy proton beams to a variety of fixed-target scientific programs, including a flagship long-baseline neutrino program. With the advent of the Deep Underground Neutrino Experiment (DUNE ) and Long ... More

The ENUBET narrow band neutrino beamMar 27 2019The narrow band beam of ENUBET is the first implementation of the "monitored neutrino beam" technique proposed in 2015. ENUBET has been designed to monitor lepton production in the decay tunnel of neutrino beams and to provide a 1% measurement of the ... More

Transverses instability in the "light sail" ion accelerationMar 27 2019Acceleration of ultrathin plasma foils by laser radiation pressure promises compact alternatives to the conventional ion accelerators. It was shown, that a major showstopper for such schemes is a strong transverse instability, which develops the surface ... More

Transverse instability in the "light sail" ion accelerationMar 27 2019Apr 03 2019Acceleration of ultrathin plasma foils by laser radiation pressure promises compact alternatives to the conventional ion accelerators. It was shown, that a major showstopper for such schemes is a strong transverse instability, which develops the surface ... More

A 15-MW Proton Driver for Neutrino Oscillation ExperimentsMar 22 2019To maximize the physics potential of future neutrino oscillation experiments, it is proposed to build a 15-MW `proton driver' consisitng solely of a 3-GeV proton injector linac (PI) and a 17-GeV superconducting ILC-type linac (SCL). The proposed facility ... More

The ENUBET BeamlineMar 21 2019The ENUBET ERC project (2016-2021) is studying a narrow band neutrino beam where lepton production can be monitored at single particle level in an instrumented decay tunnel. This would allow to measure $\nu_{\mu}$ and $\nu_{e}$ cross sections with a precision ... More

Gamma Factory at CERN - novel research tools made of lightMar 21 2019We discuss the possibility of creating novel research tools by producing and storing highly relativistic beams of highly ionised atoms in the CERN accelerator complex, and by exciting their atomic degrees of freedom with lasers to produce high-energy ... More

Application of multi-objective optimisation to match turn pattern measurements for cyclotronsMar 21 2019The usage of numerical models to study the evolution of particle beams is an essential step in the design process of particle accelerators However, uncertainties of input quantities such as beam energy and magnetic field lead to simulation results that ... More

The Compact Linear Collider (CLIC) - Project Implementation PlanMar 20 2019The 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 aspects of the ... More

The design and performance of the ESS Neutrino Super Beam project ESSνSBMar 20 2019Apr 01 2019The European Spallation Source linear proton accelerator will have a uniquely high power of 5 MW. The modifications and additions to the accelerator that are required to enable the generation of a uniquely intense neutrino Super Beam ESS{\nu}SB for measurement ... More

The design and performance of the EES Neutrino Super Beam project ESSνSBMar 20 2019The European Spallation Source linear proton accelerator will have a uniquely high power of 5 MW. The modifications and additions to the accelerator that are required to enable the generation of a uniquely intense neutrino Super Beam ESS{\nu}SB for measurement ... More

Machine Learning to Enable Orders of Magnitude Speedup in Mult-Objective Optimization of Particle Accelerator SystemsMar 18 2019Mar 21 2019High-fidelity physics simulations are powerful tools in the design and optimization of charged particle accelerator systems. However, the computational burden of these simulations often limits their use in practice for design optimization and experiment ... More

Machine Learning to Enable Orders of Magnitude Speedup in Mult-Objective Optimization of Particle Accelerator SystemsMar 18 2019High-fidelity \psims\ are powerful tools in the design and optimization of charged particle accelerator systems. However, the computational burden of these simulations often limits their use in practice for design optimization and experiment planning. ... More

Wigner Rotation: Theory and Application to Practical Relativistic Engineering ProblemsMar 18 2019The standard expression for the Wigner rotation leads to incorrect result for the wavefront rotation. The results for the Wigner rotation in the Lorentz lab frame obtained by many experts on special relativity such as Moeller and Jackson, are incorrect. ... More

Design philosophy and method for modern high-current, radio-frequency quadrupole accelerators with low emittance transferMar 15 2019Modern radio frequency quadrupole (RFQ) accelerators are facing the challenges of space charge effects due to increased demands on beam current. This study investigated how to reach good beam quality and a compact structure simultaneously by avoiding ... More

Spectral Control via Multi-Species Effects in PW-Class Laser-Ion AccelerationMar 15 2019Laser-ion acceleration with ultra-short pulse, PW-class lasers is dominated by non-thermal, intra-pulse plasma dynamics. The presence of multiple ion species or multiple charge states in targets leads to characteristic modulations and even mono-energetic ... More

Scenarios for LHC/FCC Based Gamma-Proton CollidersMar 14 2019The advantage of the linac-ring type electron proton collider is that constuction of $\gamma$p collider based on it can be possible. In a $\gamma$p collider high energy photons can be generated from Compton backscattering of laser photons on electrons ... More

Density shocks in the relativistic expansion of highly charged one component plasmasMar 14 2019In a previous paper we showed that dynamical density shocks occur in the non-relativistic expansion of dense single component plasmas relevant to ultrafast electron microscopy; and we showed that fluid models capture these effects accurately. We show ... More

The Integrable Optics Test AcceleratorMar 14 2019The Integrable Optics Test Accelerator (IOTA) at the Fermilab Accelerator Science & Technology (FAST) Facility is beginning operations, with an experimental program aimed at developing technology to enable future high intensity particle beams. The results ... More

Laser Driven Ultra-compact Undulator for Synchrotron RadiationMar 13 2019Laser wakefield accelerators have emerged as a promising candidate for compact synchrotron radiation and even x-ray free electron lasers. Today, to make the electrons emit electromagnetic radiation, the trajectories of laser wakefield accelerated electrons ... More

Hybrid LWFA $\vert$ PWFA Staging as a Beam Energy and Brightness Transformer : Conceptual Design and SimulationsMar 11 2019We present a conceptual design for a hybrid laser-to-beam-driven plasma wakefield accelerator. In this setup, the output beams from a laser-driven plasma wakefield accelerator (LWFA) stage are used as input beams of a new beam-driven plasma accelerator ... More

Semiclassical probability of radiation of twisted photons in the ultrarelativistic limitMar 10 2019The semiclassical general formula for the probability of radiation of twisted photons by ultrarelativistic scalar and Dirac particles moving in the electromagnetic field of a general form is derived. This formula is the analog of the Baier-Katkov formula ... More

Record fast-cycling accelerator magnet based on high temperature superconductorsMar 09 2019Four decades ago development of high-current superconducting NbTi wire cables revolutionized the magnet technology for energy frontier accelerators, such as Tevatron, RHIC and LHC. The NbTi based magnets offered advantage of much higher fields B and much ... More

Source term calculation and validation for ${}^{18}$F-production with a cyclotron for medical applications at HZDRMar 06 2019In this document we present the calculation and experimental validation of a source term for ${}^{18}$F-production with a cyclotron for medical applications operating at 18 MeV proton energy and 30 $\mu$A proton current. The Monte Carlo codes MCNP6 and ... More

New exotic beams from the SPIRAL 1 upgradeMar 06 2019Since 2001, the SPIRAL 1 facility has been one of the pioneering facilities in ISOL techniques for reaccelerating radioactive ion beams: the fragmentation of the heavy ion beams of GANIL on graphite targets and subsequent ionization in the Nanogan ECR ... More

Superintense Laser-driven Ion Beam AnalysisMar 05 2019Ion beam analysis techniques are among the most powerful tools for advanced material characterization. Despite their growing relevance in a widening number of fields, most ion beam analysis facilities still rely on the oldest accelerator technologies, ... More

The International Linear Collider: A Global ProjectMar 05 2019Mar 08 2019The International Linear Collider (ILC) is now under consideration as the next global project in particle physics. In this report, we review of all aspects of the ILC program: the physics motivation, the accelerator design, the run plan, the proposed ... More

The International Linear Collider: A Global ProjectMar 05 2019The International Linear Collider (ILC) is now under consideration as the next global project in particle physics. In this report, we review of all aspects of the ILC program: the physics motivation, the accelerator design, the run plan, the proposed ... More

The International Linear Collider: A Global ProjectMar 05 2019Apr 05 2019The International Linear Collider (ILC) is now under consideration as the next global project in particle physics. In this report, we review of all aspects of the ILC program: the physics motivation, the accelerator design, the run plan, the proposed ... More

Higher order mode damper for low energy RHIC electron cooler SRF booster cavityMar 01 2019To improve RHIC luminosity for heavy ion beam energies below 10 GeV/nucleon, the Low Energy RHIC electron Cooler (LEReC) is currently under commissioning at BNL. The Linac of LEReC is designed to deliver a 1.6 MeV to 2.6 MeV electron beam, with rms dp/p ... More

Calibration Technique for Rotating PCB Coil Magnetic Field SensorsFeb 28 2019A high-accuracy calibration of inductive coil sensors based on Printed Circuit Board (PCB), commonly used in rotating coil field measurements of particle accelerator magnets, is presented. The amplitude and phase of signals with and without main field ... More

Reconstruction of Storage Ring 's Linear Optics with Bayesian InferenceFeb 28 2019A novel approach of accurately reconstructing storage ring's linear optics from turn-by-turn (TbT) data containing measurement error is introduced. This approach adopts a Bayesian inference based on the Markov Chain Monte-Carlo (MCMC) algorithm, which ... More

Reconstruction of Storage Ring 's Linear Optics with Bayesian InferenceFeb 28 2019Mar 01 2019A novel approach of accurately reconstructing storage ring's linear optics from turn-by-turn (TbT) data containing measurement error is introduced. This approach adopts a Bayesian inference based on the Markov Chain Monte-Carlo (MCMC) algorithm, which ... More

Plasma-Cascade Instability- theory, simulations and experimentFeb 28 2019In this letter we describe a new micro-bunching instability occurring in charged particle beams propagating along a straight trajectory: based on the dynamics we named it a Plasma Cascade Instability.

Optimizing Laser Pulses for Narrowband Inverse Compton Sources in the High-Intensity RegimeFeb 27 2019Scattering of ultraintense short laser pulses off relativistic electrons allows one to generate a large number of X- or $\gamma$-ray photons with the expense of the spectral width---temporal pulsing of the laser inevitable leads to considerable spectral ... More

Report of the International Committee for Future AcceleratorsFeb 26 2019The International Committee for Future Accelerators (ICFA) has been in existence for well over four decades. Its mission is to facilitate international collaboration in the construction and use of accelerators for high energy physics. This report presents, ... More

Reconfigurable Photonic Circuit for Controlled Power Delivery to Laser-Driven Accelerators on a ChipFeb 26 2019Dielectric laser acceleration (DLA) represents a promising approach to building miniature particle accelerators on a chip. However, similar to conventional RF accelerators, an automatic and reconfigurable control mechanism is needed to scale DLA technology ... More

Solenoid: universal tool for measuring beam parametersFeb 25 2019Solenoids are frequently used for focusing of the low energy electron beams. In this paper we focus on using these magnets as a nearly universal tool for measuring beam parameters including energy, emittance, and the beam position and angle with respect ... More

Antiproton beams with low energy spread for antihydrogen productionFeb 25 2019A low energy antiproton transport from the ASACUSA antiproton accumulation trap (MUSASHI trap) to the antihydrogen production trap (double cusp trap) is developed. The longitudinal antiproton energy spread after the transport line is 0.23 +- 0.02 eV, ... More

Closed orbit correction at synchrotrons for symmetric and near-symmetric latticesFeb 22 2019This contribution compiles the benefits of lattice symmetry in the context of closed orbit correction. A symmetric arrangement of BPMs and correctors results in structured orbit response matrices of Circulant or block Circulant type. These forms of matrices ... More

Longitudinal phase-space manipulation with beam-driven plasma wakefieldsFeb 21 2019The development of compact accelerator facilities providing high-brightness beams is one of the most challenging tasks in field of next-generation compact and cost affordable particle accelerators, to be used in many fields for industrial, medical and ... More

Optimization of Undulator Parameters for 125 GeV Drive BeamFeb 20 2019In the baseline design of the International Linear Collider (ILC) an undulator-based source is foreseen for the positron source in order to match the physics requirements. The baseline parameters are optimized for the ILC at sqrt(s)=500 GeV, that means ... More

Energy Deposition along The Helical Undulator at ILC-250GeVFeb 20 2019The positron source of the International Linear Collider is based on a superconducting helical undulator passed by the high-energy electron beam to generate photons which hit a conversion target. Since the photons are circularly polarized the resulting ... More

Status of the undulator-based ILC positron sourceFeb 20 2019The design of the positron source for the International Linear Collider (ILC) is still under consideration. The baseline design plans to use the electron beam for the positron production before it goes to the IP. The high-energy electrons pass a long ... More

High-efficiency broadband THz emission via diffraction-radiation cavityFeb 20 2019Accelerator-based terahertz (THz) radiation has been expected to realize a high-power broadband source. Employing a low-emittance and short-bunch electron beam at a high repetition rate, a scheme of coherent diffraction-radiation in an optical cavity ... More

Self amplification of channeling radiation at Bragg diffraction conditionsFeb 19 2019X-ray radiation of relativistic electrons passing through the crystal lattice (in case of channeling radiation) requires electrons with energies just from tens up to hundreds MeV, but has a drawback: low number of emitted X-ray quanta. However, the brightness ... More

From self-organization in relativistic electron bunches to coherent synchrotron light: observation using a photonic time-stretch digitizerFeb 16 2019In recent and future synchrotron radiation facilities, relativistic electron bunches with increasingly high charge density are needed for producing brilliant light at various wavelengths, from X-rays to terahertz. In such conditions, interaction of electrons ... More

A magnetic spectrometer to measure electron bunches accelerated at AWAKEFeb 15 2019A magnetic spectrometer has been developed for the AWAKE experiment at CERN in order to measure the energy distribution of bunches of electrons accelerated in wakefields generated by proton bunches in plasma. AWAKE is a proof-of-principle experiment for ... More

Experimental demonstration of the correction of coupled transverse dynamics aberration in an rf photoinjectorFeb 14 2019The production of electron bunches with low transverse emittance approaches the thermal emittance of the photocathode as various aberrations are corrected. Recently, the coupled transverse dynamics aberration was theoretically identified as a significant ... More

Active Suppression of Microphonics Detuning in high $Q_L$ CavitiesFeb 13 2019Operation of Superconducting Radio Frequency (SRF) cavities with high loaded quality factors is becoming increasingly preferred for applications which involve low beam loading including Energy Recovery Linacs (ERL). Vibration induced microphonics detuning ... More

Improving performance of inverse Compton sources through laser chirpingFeb 12 2019We present a new paradigm for computation of radiation spectra in the non-linear regime of operation of inverse Compton sources characterized by high laser intensities. The resulting simulations show an unprecedented level of agreement with the experiments. ... More

Terahertz oscilloscope for recording time information of ultrashort electron beamsFeb 09 2019We propose and demonstrate a Terahertz (THz) oscilloscope for recording time information of an ultrashort electron beam. By injecting a laser-driven THz pulse with circular polarization into a dielectric tube, the electron beam is swept helically such ... More

Beam Commissioning Results from the CBETA Fractional Arc TestFeb 09 2019This work describes first commissioning results from the Cornell Brookhaven Energy Recovery Test Accelerator Fractional Arc Test. These include the recommissioning of the Cornell photo-injector, the first full energy operation of the main linac with beam, ... More

Beam Commissioning Results from the CBETA Fractional Arc TestFeb 09 2019Feb 12 2019This work describes first commissioning results from the Cornell Brookhaven Energy Recovery Test Accelerator Fractional Arc Test. These include the recommissioning of the Cornell photo-injector, the first full energy operation of the main linac with beam, ... More

Low RF power plasma ignition and detection for in-situ cleaning of 1.3 GHz 9-cell cavitiesFeb 08 2019Superconducting Radio Frequency (SRF) cavities performance preservation is crucial, from vertical test to accelerator operation. Field Emission (FE) is still one of the performance limiting factors to overcome and plasma cleaning has been proven successful ... More

Reduction of coherent betatron oscillations with RF fields in the Muon $g-2$ ExperimentFeb 08 2019Coherent betatron oscillations (CBO) of the beam centroid in the Muon $g-2$ storage ring modulates the radial decay position of the muons. This results in a modulation of the counted rate of the decay positrons due to the detector acceptance, asymmetry ... More

Magnetic design of twin aperture cos-theta superconducting dipoles with a semi-analytic approachFeb 06 2019The magnetic design is a basic aspect of the superconducting magnets for particle accelerators. When dealing with single aperture cos-theta type dipoles, at the first order, the design can be performed with an analytic approach based on a sector dipole ... More

Accurate Taylor transfer maps for large aperture iron dominated magnets used in charged particle separators and spectrometersFeb 01 2019For high-resolution separators like the projected Super-FRS at FAIR, an adapted and accurate ion-optical model considering realistic B-dependent magnet parameters is crucial in achieving the desired parameters (e.g. resolution) and to enable a fast optimization. ... More

Laser-Driven Electron Lensing in Silicon MicrostructuresFeb 01 2019We demonstrate a laser-driven, tunable electron lens fabricated in monolithic silicon. The lens consists of an array of silicon pillars pumped symmetrically by two 300 fs, 1.95 $\mu$m wavelength, nJ-class laser pulses from an optical parametric amplifier. ... More

The International Linear Collider: Prospects and Possible TimelinesJan 29 2019The case for the International Linear Collider and the prospects for its realisation as well as possible timelines are discussed.

The International Linear Collider. A Global ProjectJan 28 2019A large, world-wide community of physicists is working to realise an exceptional physics program of energy-frontier, electron-positron collisions with the International Linear Collider (ILC). This program will begin with a central focus on high-precision ... More

The International Linear Collider. A European PerspectiveJan 28 2019The International Linear Collider (ILC) being proposed in Japan is an electron-positron linear collider with an initial energy of 250 GeV. The ILC accelerator is based on the technology of superconducting radio-frequency cavities. This technology has ... More

Impact of ion dynamics on laser-driven electron acceleration and gamma-ray emission in structured targets at ultra-high laser intensitiesJan 27 2019We examine the impact of the ion dynamics on laser-driven electron acceleration in an initially empty channel irradiated by an ultra-high intensity laser pulse with $I > 10^{22}$ W/cm$^2$. The negative charge of the accelerated electrons inside the channel ... More

Towards an Advanced Linear International ColliderJan 25 2019Jan 30 2019This document provides detailed information on the status of Advanced and Novel Accelerators techniques and describes the steps that need to be envisaged for their implementation in future accelerators, in particular for high energy physics applications. ... More

ALEGRO input for the 2020 update of the European StrategyJan 24 2019Jan 30 2019Advanced and Novel Accelerators (ANAs) can provide acceleration gradients orders of magnitude greater than conventional accelerator technologies, and hence they have the potential to provide a new generation of more compact, high-energy machines. In view ... More

Plasma Lenses for Relativistic Laser Beams in Laser Wakefield AcceleratorsJan 23 2019Focusing petawatt-level laser beams to a variety of spot sizes for different applications is expensive in cost, labor and space. In this paper, we propose a plasma lens to flexibly resize the laser beam by utilizing the laser self-focusing effect. Using ... More

Radiation rebound and Quantum Splash in Electron Laser CollisionJan 23 2019The radiation reaction is expected to play a critical role in light-matter interactions at extreme intensity. Knowing key characteristic of this effect will enable its experimental detection and, most importantly, allow to investigate the causality of ... More

Simulation of Muon Background at the ILCJan 19 2019Feb 01 2019Beginning with the first linear collider, SLC at SLAC, it was quickly discovered that high energy muons that are produced in halo collimators in the beam delivery system can cause a significant background in the experiment detector. Following publication ... More

Muon CollidersJan 18 2019Muon colliders have a great potential for high-energy physics. They can offer collisions of point-like particles at very high energies, since muons can be accelerated in a ring without limitation from synchrotron radiation. However, the need for high ... More

Low power commissioning of an innovative laser beam circulator for inverse Compton scattering Gamma-ray sourceJan 16 2019We report on the optical commissioning of the high power laser beam circulator (LBC) for the high brightness Compton {\gamma}-ray source Extreme Light Infrastructure for Nuclear Physics. Tests aiming at demonstrating the optical performances of the LBC ... More

Radiation of a Charge Moving in a Wire StructureJan 15 2019A theoretical approach for describing the electromagnetic radiation produced by prolonged electron bunch propagating in the lattice of metallic wires of finite length is presented. This approach is based on vibrator antenna theory and involves approximate ... More

muCool: A novel low-energy muon beam for future precision experimentsJan 15 2019Experiments with muons ($\mu^{+}$) and muonium atoms ($\mu^{+}e^{-}$) offer several promising possibilities for testing fundamental symmetries. Examples of such experiments include search for muon electric dipole moment, measurement of muon $g-2$ and ... More

A high precision neutrino beam for a new generation of short baseline experimentsJan 15 2019The current generation of short baseline neutrino experiments is approaching intrinsic source limitations in the knowledge of flux, initial neutrino energy and flavor. A dedicated facility based on conventional accelerator techniques and existing infrastructures ... More

Temporal magnification for streaked ultrafast electron diffraction and microscopyJan 14 2019One of the frontiers of modern electron scattering instrumentation is improving temporal resolution in order to enable the observation of dynamical phenomena at their fundamental time-scales. We analyze how a radiofrequency cavity can be used as an electron ... More

All Optical Control of Beam Dynamics in a DLAJan 14 2019Dielectric laser acceleration draws upon nano-fabrication techniques to build photonic structures for high gradient electron acceleration. At the small spatial scales characteristic of these structures conventional accelerator techniques become ineffective ... More

Proton Driven Plasma Wakefield Acceleration in AWAKEJan 14 2019In this article, we briefly summarize the experiments performed during the first Run of the Advanced Wakefield Experiment, AWAKE, at CERN (European Organization for Nuclear Research). The final goal of AWAKE Run 1 (2013 - 2018) was to demonstrate that ... More

Ultrafast Relativistic Electron NanoprobesJan 11 2019One of the frontiers in electron scattering is to couple ultrafast temporal resolution with highly localized probes to investigate the role of microstructure on material properties. Here, taking advantage of the unprecedented average brightness of the ... More

A New Approach for Measuring the Muon Anomalous Magnetic Moment and Electric Dipole MomentJan 10 2019This paper introduces a new approach to measure the muon magnetic moment anomaly $a_{\mu} = (g-2)/2$, and the muon electric dipole moment (EDM) $d_{\mu}$ at the J-PARC muon facility. The goal of this experiment is to measure $a_{\mu}$ and $d_{\mu}$ using ... More

A New Approach for Measuring the Muon Anomalous Magnetic Moment and Electric Dipole MomentJan 10 2019Mar 11 2019This paper introduces a new approach to measure the muon magnetic moment anomaly $a_{\mu} = (g-2)/2$, and the muon electric dipole moment (EDM) $d_{\mu}$ at the J-PARC muon facility. The goal of our experiment is to measure $a_{\mu}$ and $d_{\mu}$ using ... More