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Accelerator Physics - Science topic

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Publications related to Accelerator Physics (4,366)
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Article
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Recording electric field evolution in single-shot with THz bandwidth is needed in science including spectroscopy, plasmas, biology, chemistry, Free-Electron Lasers, accelerators, and material inspection. However, the potential application range depends on the possibility to achieve sub-picosecond resolution over a long time window, which is a large...
Article
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Proton beams with up to 100 pC bunch charge, 0.48 MeV cutoff energy, and divergence as low as 3° were generated from solid targets at kHz repetition rate by a few-mJ femtosecond laser under controlled plasma conditions. The beam spatial profile was measured using a small aperture scanning time-of-flight detector. Detailed parametric studies were pe...
Article
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Despite several studies that have been investigated physical inactivity and age-related effects on orthostatic tolerance, impaired hemodynamics and postural balance responses to orthostatic stress are incorrectly attributed to aging or sedentarism alone. The isolated effects from aging and sedentarism should be investigated through comparative stud...
Preprint
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Particle acceleration physics at supernova remnant (SNR) shocks is one of the most intriguing problems in astrophysics. SNR RCW~86 provides a suitable environment for understanding the particle acceleration physics because one can extract the information of both accelerated particles and acceleration environment at the same regions through the brig...
Article
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Ultrafast electron diffraction (UED) is a technique in which short-pulse electron beams can probe the femtosecond-scale evolution of atomic structure in matter driven far from equilibrium. As an accelerator physics challenge, UED imposes stringent constraints on the brightness of the probe electron beam. The low normalized emittance employed in UED...
Conference Paper
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Carbon-based nanostructures and metamaterials offer extraordinary mechanical and opto-electrical properties, which make them suitable for applications in diverse fields, including , for example, bioscience, energy technology and quantum computing. In the latest years, important R&D efforts have been made to investigate the potential use of graphene...
Poster
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Carbon-based nanostructures and metamaterials offer extraordinary mechanical and opto-electrical properties, which make them suitable for applications in diverse fields, including, for example, bioscience, energy technology and quantum computing. In the latest years, important R&D efforts have been made to investigate the potential use of graphene...
Book
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L'accélérateur de particules est le grand instrument scientifique le plus répandu à travers le monde. Il est en passe de devenir l'élément stratégique clé pour tout programme de développement scientifique au niveau d'un pays. Ces dispositifs, en plus de permettre de comprendre le monde qui nous entoure, peuvent de surcroît être utilisés pour analys...
Article
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Metal ion beams are more and more requested by physicists (Nuclear Physics, Material Physics) for their experiments. At GANIL, they are produced by Electron Cyclotron Resonance (ECR) Ion Sources for the two accelerator machines: ECR4 & ECR4M Sortais et al. (1989) [1] for the Cyclotrons and PhoenixV3 for the Linac Thuillier et al. (2016) [2]. One of...
Preprint
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Particle accelerators as photon sources are advanced tools in studying the structure and dynamical properties of matter. The present workhorses of these sources are storage ring-based synchrotron radiation facilities and linear accelerator-based free-electron lasers, delivering light with high repetition rate and high peak brilliance (power), respe...
Thesis
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Particle accelerators as photon sources are advanced tools in studying the structure and dynamical properties of matter. The present workhorses of these sources are storage ring-based synchrotron radiation facilities and linear accelerator-based free-electron lasers, delivering light with high repetition rate and high peak brilliance (power), respe...
Preprint
Full-text available
Space-charge effects are of great importance in particle accelerator physics. In the computational modeling, tree-based methods are increasingly used because of their effectiveness in handling non-uniform particle distributions and/or complex geometries. However, they are often formulated using an electrostatic force which is only a good approximat...
Article
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There is a great interest in the application of ultraintense and ultrashort lasers in the area of accelerator physics. Recent advances in attosecond pulsed lasers have generated a new possibility in the production of high quality and high energy electron beams. The present work investigates the attosecond laser induced electron acceleration in the...
Article
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Background Symptom burden remains a critical concern for individuals with non-small cell lung cancer (NSCLC) following the completion of treatment. The most common symptom clusters, dyspnea (shortness of breath) and fatigue, can contribute to physical decline, reductions in quality of life, and a higher risk of comorbidities and mortality. Dyspnea...
Preprint
Full-text available
A new equation for describing physical systems with radiation is obtained in this paper. Examples of such systems can be found in plasma physics, accelerator physics (synchrotron radiation) and astrophysics (gravitational waves). The new equation is written on the basis of the third Vlasov equation for the probability density distribution function...
Article
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Over the last three decades, the landscape of cancer treatment with radiotherapy has never stopped improving. ENLIGHT – the European Network for Light Ion Hadron Therapy – has been an active participant in the huge changes that have taken place, in particular in Europe. At the end of the 90s when I arrived at CERN, it appeared clear that an improve...
Preprint
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In this article we consider two dynamical systems: the McMillan sextupole and octupole integrable mappings originally introduced by Edwin McMillan; the second one is also known as canonical McMillan map. Both of them are simplest symmetric McMillan maps with only one intrinsic parameter, the trace of the Jacobian at the fixed point. While these dyn...
Preprint
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Large scale laser facilities are needed to advance the energy frontier in high energy physics and accelerator physics. Laser plasma accelerators are core to advanced accelerator concepts aimed at reaching TeV electron electron colliders. In these facilities, intense laser pulses drive plasmas and are used to accelerate electrons to high energies in...
Preprint
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Recent advancements in hardware accelerators such as Tensor Processing Units (TPUs) speed up computation time relative to Central Processing Units (CPUs) not only for machine learning but, as demonstrated here, also for scientific modeling and computer simulations. To study TPU hardware for distributed scientific computing, we solve partial differe...
Article
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Real-time biomechanical feedback (BMF) is a relatively new area of research. The potential of using advanced technology to improve motion skills in sport and accelerate physical rehabilitation has been demonstrated in a number of studies. This paper provides a literature review of BMF systems in sports and rehabilitation. Our motivation was to exam...
Article
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Purpose Linear accelerator (linac) spectra, used to improve the accuracy of dose calculation and to produce a complete description of beam quality, among other aspects, are relevant in radiotherapy and linear accelerator physics. Methods In this work we apply neural networks in solving an ill-conditioned system of linear equations, to indirectly me...
Presentation
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Learn fundamentals of plasma physics and its application in military, stealth, communications, antenna, radar, space and astrophysics, controlled fusion, accelerator physics, beam storage and effect analysis of plasma stealth technology in hypersonic vehicle. Learn more. Request further information. Sign up for training. https://www.tonex.com/trai...
Preprint
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After a summary of relevant comments and recommendations from various reports over the last ten years, this paper examines the modeling needs in accelerator physics, from the modeling of single beams and individual accelerator elements, to the realization of virtual twins that replicate all the complexity to model a particle accelerator complex as...
Book
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Initially designed to study the very smallest components of the matter that surrounds us and of which we are composed, particle accelerators are now widely used in many different fields—fundamental and applied science, advanced technology, and various industries. Particle accelerators are even used to study and preserve objects of cultural heritage...
Article
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Since the beginning of information processing by electronic components, the nervous system has served as a metaphor for the organization of computational primitives. Brain-inspired computing today encompasses a class of approaches ranging from using novel nano-devices for computation to research into large-scale neuromorphic architectures, such as...
Preprint
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Since the beginning of information processing by electronic components, the nervous system has served as a metaphor for the organization of computational primitives. Brain-inspired computing today encompasses a class of approaches ranging from using novel nano-devices for computation to research into large-scale neuromorphic architectures, such as...
Preprint
Full-text available
Machine learning has recently been applied and deployed at several light source facilities in the domain of Accelerator Physics. We introduce an approach based on machine learning to produce a fast-executing model that predicts the polarization and energy of the radiated light produced at an insertion device. This paper demonstrates how a machine l...
Article
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We present the results of an experimental investigation of quasi-periodical kinetic instabilities exhibited by magnetically confined electron cyclotron resonance heated plasmas. The instabilities were detected by measuring plasma microwave emission, electron losses, and wall bremsstrahlung. The instabilities were found to be grouped into fast seque...
Article
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: Human being is distinguished by will and freedom, and this is what makes his behavior unpredictable. Sometimes the best conditions and factors are available so that a person can act and adopt the best decisions and draw the most beautiful scenarios for the future, but other times, the pace of events accelerates, physical and psychological obstacl...
Preprint
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The Integrable Optics Test Accelerator (IOTA) at Fermilab is a small machine dedicated to a broad frontier accelerator physics program. An important aspect of this program is to investigate the potential benefits of the resonance free tune spread achievable with integrable optics to store and accelerate high intensity proton beams for which space c...
Thesis
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This work was performed at the Ferninfrarot Linac- und Test-Experiment (FLUTE) at the Karlsruhe Institute of Technology (KIT). FLUTE is designed as a test facility for accelerator physics, as well as a source of high-intensity coherent THz radiation [1]. Very short electron bunches are needed to generate the coherent THz radiation, which requires a...
Article
Full-text available
Dielectric laser accelerators (DLAs) hold great promise for producing economic and compact on-chip radiation sources. On-chip DLAs benefit from fabrication capabilities of the silicon industry and from breakthroughs in silicon-photonic nanostructures to enhance the interaction between particles and laser fields. Seemingly unrelated recent advances...
Article
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This study aimed to explore the protective effect of sulfated Codonopsis polysaccharides (SCP) on acute oxidative stress. SCP was modified by chlorosulfonic acid-pyridine method from Codonopsis polysaccharides (CP), which had 34.48% of sulfate content determined by ultrasonic-acidic barium chromate spectrophotometry. The analysis of Fourier transfo...
Conference Paper
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The dual-axial scan streak camera plays an important role in the super-fast optical measurement and the beam diagnosis of the accelerators. Indeed, the development of the synchrotron light measurement system by virtue of the streak camera provides an effective tool and research platform for accelerator physics and super-fast optical phenomenon. In...
Preprint
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Using Bayesian analyses we study the solar electron density with the NANOGrav 11-year pulsar timing array (PTA) dataset. Our model of the solar wind is incorporated into a global fit starting from pulse times-of-arrival. We introduce new tools developed for this global fit, including analytic expressions for solar electron column densities and open...
Conference Paper
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Postharvest of horticultural products involves several phases including transportation, handling, packaging, etc. Transportation is essential, but the vibration produced by vehicles during road transit is one of the key causes of superficial and critical damage to fresh produce. Mechanical damage is one of the most common consequences of resulting...
Preprint
Full-text available
Based on the Differential Susceptibility Theory, we examined whether the relationship between pubertal maturation and depressive symptoms can be moderated by individual differences in environmental sensitivity. The current article used the three-wave data collected from Japanese adolescents aged from 12 to 15 years (n = 209). Consequently, a signif...
Article
Full-text available
The European Synchrotron Radiation Facility (ESRF) operates a 6 GeV fourth generation light source, the ESRF-Extremely Brilliant Source (EBS). This storage ring is the first to implement the hybrid multibend achromat lattice (HMBA) that provides a reduction of the horizontal emittance of approximately a factor 30 with respect to the former double b...
Preprint
Full-text available
Understanding beam and spin dynamics are fundamental in accelerator physics, and there has been growing interest in having more precise estimations of the beam and spin dynamics variables, as more high precision particle physics experiments in the Intensity Frontier appear. The present paper provides analytical estimations of some of the important...
Preprint
Full-text available
Current trends in the computer graphics community propose leveraging the massive parallel computational power of GPUs to accelerate physically based simulations. Collision detection and solving is a fundamental part of this process. It is also the most significant bottleneck on physically based simulations and it easily becomes intractable as the n...
Article
Full-text available
The FCC-ee, with its unprecedented luminosity goal and high energy reach, creates challenges and requires solutions to many issues in order to produce a realistic design for the complex machine detector interface. The interaction region design for the FCC-ee adopts the crab-waist collision scheme and proposes an elegant local chromaticity correctio...
Article
Full-text available
Objectives Surgical treatment options for the repair of symptomatic partial thickness and minimally retracted full-thickness rotator cuff tears include transtendinous or tear-completion transosseous-equivalent approaches. While transtendinous repairs are associated with superior biomechanical outcomes and lower rates of cuff re-tear, they have been...
Conference Paper
Full-text available
The coupling of the beam is widely studied in the accelerator physics field. Projected transverse emittances easily grow up if the beam is transversely-coupled. If we decou-ple the transverse coupled beam, the transverse emittance can be small. The matrix approach based on the symplectic transformation theory for decoupling the coupled beam is summ...
Conference Paper
Full-text available
When the history of civilization is examined in a chronological order, it is a striking fact that the use of natural stone has an important place in the life of human beings (Bradley, 1998). The natural stones were used in the construction of buildings and monuments in 600 BC, firstly in columns that replaced wooden columns in ancient Greece, and l...
Conference Paper
Full-text available
The Secondary Electron Emission (SEE) process plays an important role in the performance of various devices. For instance, the multipactor mechanism, driven by SEE, affects radio-frequency components of space missions. SEE is also a concern in other domains, for instance the accelerator physics community, where the beam lines stability can strongly...
Article
Full-text available
Machine learning models of accelerator systems ("surrogate models") are able to provide fast, accurate predictions of accelerator physics phenomena. However, approaches to date typically do not include measured input diagnostics, such as the initial beam distributions, which are critical for accurately representing the beam evolution through the sy...
Article
Full-text available
Nuclear resonance fluorescence experiments typically require high rates of monochromatic photons due to the narrow linewidth of these resonances. Inverse Compton scattering sources are used to perform these experiments. Their intrinsic excellent monochromaticity is however spoiled by a variety of unavoidable imperfections related to the electron an...
Preprint
Full-text available
Background: Symptom burden remains a critical concern for individuals with non-small cell lung cancer (NSCLC) following the completion of treatment. The most common symptom clusters, dyspnea (shortness of breath) and fatigue,can contribute to physical decline, reductions in quality of life, and a higher risk of comorbidities and mortality. Dyspnea...
Conference Paper
Full-text available
Reinforcement learning algorithms have risen in popularity in the accelerator physics community in recent years, showing potential in beam control and in the optimization and automation of tasks in accelerator operation. The Helmholtz AI project "Machine Learning Toward Autonomous Accelerators" is a collaboration between DESY and KIT that works on...
Article
Full-text available
The high-energy petawatt PETAL laser system was commissioned at CEA's Laser Mégajoule facility during the 2017-2018 period. This paper reports in detail on the first experimental results obtained at PETAL on energetic particle and photon generation from solid foil targets, with special emphasis on proton acceleration. Despite a moderately relativis...
Article
Full-text available
Abstract The analysis of a charged particle traveling through one, two, or infinite conducting rings is presented. The problem is formulated in the spectral domain as integral equations of Fredholm type, solved by Galerkin's method employing entire domain functions factorising the correct edge behaviour of the unknown induced current. As a result,...
Article
Full-text available
As a part of SPIRAL1 upgrade, several experiments were carried out to understand the transport of 1+ (monocharged) ion beam through the SP1 ECR charge breeder ion source and to investigate the physical processes involved in charge breeding. Ion beam transport simulations were performed to reproduce the trends of the experimental results (charge bre...
Article
Full-text available
Resumen El acelerado desarrollo físico de las infraestructuras urbanas durante la Revolución Industrial y la evolución que estas han sufrido, han producido que hoy en día se encuentren algunos de estos espacios abandonados en el interior de las ciudades. Las experiencias de la revitalización del Parque de la Villette en París y del High Line de Nu...
Article
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Significant magnetic cross talks were observed between neighboring magnets on the Extremely Brilliant Source (EBS) low emittance storage ring. The main sources for these cross talks are the short longitudinal distances between magnets, which reach 47 mm in some cases. It affects mainly the dipole bending angles and the quadrupole gradients. A 1% be...
Article
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Climate vulnerability is the propensity to be adversely affected by climatic variability and natural hazards. People of low-lying islands face accelerating physical and non-physical stresses due to their greater exposure, higher sensitivity, and lower adaptive capacity towards climate change. Being home to over 0.2 million people, Sagar Island, the...
Article
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The optimal postoperative management of Achilles tendon (AT) rupture remains unknown. The past 2 decades have witnessed a trend toward less rigid immobilization, earlier weightbearing, and accelerated functional rehabilitation postoperatively. The objective of this study was to identify all high-quality studies pertaining to rehabilitation after AT...
Article
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A retrospective study is one of the most critical aspects of paleoenvironmental studies on developmental planning and environmental monitoring from a geological perspective. The semi-enclosed bay of Lamong Bay, Surabaya, and Benoa Bay, Bali, was rapidly accelerated physics and ecological development on the national scope. The contrary semi-enclosed...
Conference Paper
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In recent years, machine learning (ML) has attracted increasing interest among the accelerator field. As a complex collection of multiple physical subsystems, the design and operation of an accelerator can be very nonlinear and complicated , while ML is taken as a powerful tool to solve such nonlinear and complicated problems. In this study, we rep...
Conference Paper
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The High Energy Photon Source (HEPS) is a 34-pm, 1360-m storage ring light source being built in the suburb of Beijing, China. The HEPS construction started in mid-2019. While the physics design has been basically determined, modifications on the HEPS accelerator physics design have been made since 2019, in order to deal with challenges emerging fr...
Thesis
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In the last years there has been intense linear electron-accelerator development driven by different communities as the X-FEL community, the High Energy Physics (HEP) linear-collider community: ILC and CLIC as well as HEP circular-collider community: FCC-ee and CEPC. Furthermore, there are also many other applications from medical science to indust...
Thesis
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Neutral Beam Injectors (NBI) are one of the external heating systems used to control and sustain the fusion-plasma in thermonuclear fusion devices such as tokamaks. They rely on the acceleration and neutralization of several beamlets extracted from a negative ion source of hydrogen or deuterium. For the design of the large-scale fusion reactor ITER...
Article
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We present the scope of research of a new collaboration FLAP (Fundamental & applied Linear Accelerator Physics collaboration) devoted to the study of the basics of electromagnetic interactions and new applications of controllable generation of electromagnetic radiation by relativistic electrons using functional materials.