scholarly journals All-optical quasi-monoenergetic GeV positron bunch generation by twisted laser fields

2022 ◽  
Vol 5 (1) ◽  
Author(s):  
Jie Zhao ◽  
Yan-Ting Hu ◽  
Yu Lu ◽  
Hao Zhang ◽  
Li-Xiang Hu ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Electric Fields ◽  
High Energy Physics ◽  
Energetic Electron ◽  
Three Dimensional ◽  
High Energy ◽  
Electron Positron ◽  
All Optical ◽  
Positron Bunch ◽  
Energy Physics

AbstractGeneration of energetic electron-positron pairs using multi-petawatt (PW) lasers has recently attracted increasing interest. However, some previous laser-driven positron beams have severe limitations in terms of energy spread, beam duration, density, and collimation. Here we propose a scheme for the generation of dense ultra-short quasi-monoenergetic positron bunches by colliding a twisted laser pulse with a Gaussian laser pulse. In this scheme, abundant γ-photons are first generated via nonlinear Compton scattering and positrons are subsequently generated during the head-on collision of γ-photons with the Gaussian laser pulse. Due to the unique structure of the twisted laser pulse, the positrons are confined by the radial electric fields and experience phase-locked-acceleration by the longitudinal electric field. Three-dimensional simulations demonstrate the generation of dense sub-femtosecond quasi-monoenergetic GeV positron bunches with tens of picocoulomb (pC) charge and extremely high brilliance above 1014 s−1 mm−2 mrad−2 eV−1, making them promising for applications in laboratory physics and high energy physics.

R&D steps of a 12-T common coil dipole magnet for SPPC pre-study

2016 ◽  
Vol 31 (33) ◽  
pp. 1644018 ◽  
Author(s):  
Chengtao Wang ◽  
Kai Zhang ◽  
Qingjin Xu
Keyword(s):  
High Energy Physics ◽  
Optimization Method ◽  
High Energy ◽  
Dipole Magnet ◽  
Proton Proton ◽  
Protection Method ◽  
Electron Positron ◽  
The Common ◽  
Beijing China ◽  
Energy Physics

IHEP (the Institute of High Energy Physics, Beijing, China) has started the R&D of high field accelerator magnet technology from 2014 for recently proposed CEPC-SppC (Circular Electron Positron Collider, Super proton–proton Collider) project. The conceptual design study of a 20-T dipole magnet is ongoing with the common coil configuration, and a 12-T model magnet will be fabricated in the next two years. A 3-step R&D process has been proposed to realize this 12-T common-coil model magnet: first, a 12-T subscale magnet will be fabricated with Nb3Sn and NbTi superconductors to investigate the fabrication process and characteristics of Nb3Sn coils, then a 12-T subscale magnet will be fabricated with only Nb3Sn superconductors to test the stress management method and quench protection method of Nb3Sn coils; the final step is fabricating the 12-T common-coil dipole magnet with HTS (YBCO) and Nb3Sn superconductors to test the field optimization method of the HTS and Nb3Sn coils. The characteristics of these R&D steps will be introduced in the paper.

GRAPHICAL CONCEPTS FOR THE REPRESENTATION OF EVENTS IN HIGH ENERGY PHYSICS

1990 ◽  
Vol 01 (01) ◽  
pp. 147-163 ◽  
Author(s):  
H. DREVERMANN ◽  
C. GRAB
Keyword(s):  
Magnetic Field ◽  
High Energy Physics ◽  
Three Dimensional ◽  
Charged Particles ◽  
Homogeneous Magnetic Field ◽  
High Energy ◽  
Track Geometry ◽  
Aleph Detector ◽  
Complicated Event ◽  
Energy Physics

Different methods to graphically represent points and tracks of events, measured with the ALEPH-detector at LEP, are discussed. Special emphasis is put on projections, that are adapted to the cylindrical geometry of the detector, to the track geometry of charged particles moving in a homogeneous magnetic field and to the event topologies, encountered in Z0 physics. A new concept, the so-called "V-plot", is introduced, which incorporates the full three-dimensional information of spatial points in a single picture. It is ideally suited for the study of more complicated event topologies, such as e.g. decays of particles within jets, and of the correlation between tracks and calorimeter clusters. In addition, we propose ways of combining histograms and projections to incorporate the tracking and calorimetric information into a single picture. We describe methods of employing colour schemes to facilitate recognition of correlations between hits, tracks and/or subdetectors in different representations.

Graphical Concepts for the Representation of Events in High Energy Physics

1991 ◽  
Vol 02 (01) ◽  
pp. 328-330
Author(s):  
H. DREVERMANN ◽  
C. GRAB ◽  
B.S. NILSSON ◽  
R.K. VOGL
Keyword(s):  
Magnetic Field ◽  
High Energy Physics ◽  
Three Dimensional ◽  
Charged Particles ◽  
Homogeneous Magnetic Field ◽  
High Energy ◽  
Track Geometry ◽  
Aleph Detector ◽  
Complicated Event ◽  
Energy Physics

Different methods to graphically represent points and tracks of events, measured with the ALEPH-detector at LEP, are discussed. Special emphasis is put on projections, that are adapted to the cylindrical geometry of the detector, to the track geometry of charged particles moving in a homogeneous magnetic field and to the specific event topologies, encountered in Z0 physics. A new concept, the so-called “V-plot”, is introduced, which incorporates the full three dimensional information of spatial points in a single picture. It is ideally suited for the study of more complicated event topologies, such as e.g. decays of particles within jets, and of the correlation between information from tracking and calorimetric devices. In addition, we propose ways of combining histograms and projections in a single picture. We describe methods of employing colour schemes to facilitate recognition of correlations between hits, tracks and/or subdetectors in different representations.

scholarly journals Particle identification for Higgs physics at future electron–positron collider

2020 ◽  
Vol 35 (15n16) ◽  
pp. 2041013 ◽  
Author(s):  
Wei-Ming Yao
Keyword(s):  
Higgs Physics ◽  
Yukawa Coupling ◽  
High Energy Physics ◽  
Flavor Physics ◽  
High Energy ◽  
Particle Identification ◽  
Heavy Flavor ◽  
Electron Positron ◽  
Physics Experiments ◽  
Energy Physics

Particle identification (PID) plays a key role in heavy-flavor physics in high-energy physics experiments. However, its impact on Higgs physics is still not clear. In this note, we will explore some of the potential of PID to improve the identification of heavy-flavor jets by using identified charged kaons in addition to the traditional vertexing information. This could result in a better measurement of the Higgs-charm Yukawa coupling at the future [Formula: see text] colliders.

BEPC, THE BEIJING ELECTRON-POSITRON COLLIDER

1987 ◽  
Vol 02 (06) ◽  
pp. 1707-1725 ◽  
Author(s):  
MINGHAN YE ◽  
ZHIPENG ZHENG
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Particle Accelerator ◽  
Current Status ◽  
High Energy Particle ◽  
Energy Particle ◽  
Republic Of China ◽  
Electron Positron ◽  
Physics Experiments ◽  
Energy Physics

BEPC, which is the first high energy particle accelerator to be built in the People’s Republic of China, is being constructed in Beijing. It consists of four main subsystems: a 1.4 GeV electron-positron linac, a 2.2–2.8 GeV storage ring, a magnetic spectrometer for high energy physics experiments, and synchrotron radiation facilities. All its components are described here in detail, and the current status of the construction is reported.

scholarly journals Software framework for the Super Charm-Tau factory detector project

2021 ◽  
Vol 251 ◽  
pp. 03017
Author(s):  
Maria Belozyorova ◽  
Dmitry Maksimov ◽  
Georgiy Razuvaev ◽  
Andrey Sukharev ◽  
Vitaly Vorobyev ◽  
...  
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Software Framework ◽  
High Luminosity ◽  
Collision Point ◽  
Software Packages ◽  
Electron Positron ◽  
New Ideas ◽  
Near Future ◽  
Energy Physics

The project of Super Charm-Tau (SCT) factory — a high-luminosity electron-positron collider for studying charmed hadrons and tau lepton — is proposed by Budker INP. The project implies single collision point equipped with a universal particle detector. The Aurora software framework has been developed for the SCT detector. It is based on trusted and widely used in high energy physics software packages, such as Gaudi, Geant4, and ROOT. At the same time, new ideas and developments are employed, in particular the Aurora project benefits a lot from the turnkey software for future colliders (Key4HEP) initiative. This paper describes the first release of the Aurora framework, summarizes its core technologies, structure and roadmap for the near future.

Particle Colliders for High Energy Physics

2008 ◽  
Vol 01 (01) ◽  
pp. 99-120 ◽  
Author(s):  
D. A. Edwards ◽  
H. T. Edwards
Keyword(s):  
Large Hadron Collider ◽  
Radio Frequency ◽  
High Energy Physics ◽  
Technology Development ◽  
Hadron Collider ◽  
High Energy ◽  
Half Century ◽  
Electron Positron ◽  
Proton Rings ◽  
Energy Physics

The purpose of this article is to outline the development of particle colliders from their inception just over a half-century ago, expand on today's achievements, and remark on the potential of coming years. There are three main sections, entitled "Past," "Present," and "Future." "Past" starts with the electron and electron–positron colliders of the 1950s, continues through the proton rings at CERN, and concludes with LEP. Technology development enters the section Present, "which includes not only the major colliders in both the lepton and baryon worlds, but also recognition of the near-immediate entry of the Large Hadron Collider. "Future" looks at the next potential steps, the most prominent of which is an electron–positron partner to the LHC, but there are other very interesting propositions undergoing exploration that include muon storage and even conceivably departure from reliance on radio frequency acceleration.

scholarly journals BSM: Bundled Software Manager and the application for CEPC

2020 ◽  
Vol 245 ◽  
pp. 05028
Author(s):  
Xianghu Zhao ◽  
Manqi Ruan ◽  
Gang Li ◽  
Xiaomei Zhang
Keyword(s):  
High Energy Physics ◽  
High Energy ◽  
Electron Positron ◽  
Environment Variables ◽  
Software Release ◽  
Environment Control ◽  
Set Up ◽  
Physics Experiments ◽  
Advanced Development ◽  
Energy Physics

The Circular Electron Positron Collider (CEPC) is designed as a future Higgs Factory. Like most high energy physics experiments, the offline software consists of many packages. BSM (Bundled Software Manager) is thus created in order to simplify the deployment and usage of software which has many packages and dependencies. BSM utilizes Git as the software release repository. The details of software are defined in the Git repository including installation instructions, environment, dependencies, etc. Commands are supported for various shells. Json output and python API are also available for advanced development. The installation of each package could be configured separately and extended with customized handlers. BSM manages the environment variables and the version switching is easy. It also has fine environment control on a single package. Users can also define their own packages easily and these packages will be managed by BSM with simple configuration. CEPC software has already set up the deployment procedure with BSM. And BSM is also designed with flexibility to create different applications other than CEPC software. It is suitable for the projects including a lot of packages and it is safe for different BSM applications to coexist with each other under proper configuration.

scholarly journals Physics Validation of Novel Convolutional 2D Architectures for Speeding Up High Energy Physics Simulations

2021 ◽  
Vol 251 ◽  
pp. 03042
Author(s):  
Florian Rehm ◽  
Sofia Vallecorsa ◽  
Kerstin Borras ◽  
Dirk Krücker
Keyword(s):  
Neural Networks ◽  
Monte Carlo ◽  
Network Architecture ◽  
High Energy Physics ◽  
Three Dimensional ◽  
High Energy ◽  
Generative Adversarial Networks ◽  
Convolutional Networks ◽  
Representational Power ◽  
Energy Physics

The precise simulation of particle transport through detectors remains a key element for the successful interpretation of high energy physics results. However, Monte Carlo based simulation is extremely demanding in terms of computing resources. This challenge motivates investigations of faster, alternative approaches for replacing the standard Monte Carlo technique. We apply Generative Adversarial Networks (GANs), a deep learning technique, to replace the calorimeter detector simulations and speeding up the simulation time by orders of magnitude. We follow a previous approach which used three-dimensional convolutional neural networks and develop new two-dimensional convolutional networks to solve the same 3D image generation problem faster. Additionally, we increased the number of parameters and the neural networks representational power, obtaining a higher accuracy. We compare our best convolutional 2D neural network architecture and evaluate it versus the previous 3D architecture and Geant4 data. Our results demonstrate a high physics accuracy and further consolidate the use of GANs for fast detector simulations.

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