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We derive an improved prescription for the merging of matrix elements with parton showers, extending the CKKW approach. A flavour-dependent phase space separation criterion is proposed. We show that this new method preserves the logarithmic…

High Energy Physics - Phenomenology · Physics 2010-03-05 Stefan Hoeche , Frank Krauss , Steffen Schumann , Frank Siegert

Accurate modeling of runaway electron generation and losses during tokamak disruptions is crucial for the development of reactor-scale tokamak devices. In this paper we present a reduced model for runaway electron losses due to flux surface…

Plasma Physics · Physics 2024-10-07 Oskar Vallhagen , Lise Hanebring , Tünde Fülöp , Mathias Hoppe , Istvan Pusztai

Reduction of the peak heat loads on the plasma facing components is essential for the success of the next generation of high fusion power tokamaks such as the International Thermonuclear Experimental Reactor (ITER) 1 . Many present concepts…

plasm-ph · Physics 2009-10-28 D. Post , J. Abdallah , R. E. H. Clark , N. Putvinskaya

In contemporary magnetic confinement devices, the density distribution is sensed with interferometers and actuated with feedback controlled gas injection and open-loop pellet injection. This is at variance with the density control for ITER…

Plasma Physics · Physics 2021-10-29 T. O. S. J. Bosman , M. van Berkel , M. R. de Baar

We present the first calculation of quantum electrodynamics (QED) nuclear medium effects under the experimental conditions of future Electron-Ion Collider (EIC) experiments. Our work offers numerical estimates, particularly in the context…

Nuclear Theory · Physics 2025-08-11 Shohini Bhattacharya , Oleksandr Tomalak , Ivan Vitev

The presence of ultra-narrow inter-combination spectroscopic lines in alkaline earth elements places them as promising candidates for optical atomic clocks, quantum computation, and for probing fundmental physics. Doppler cooling of these…

Atomic Physics · Physics 2023-11-15 Korak Biswas , Kushal Patel , S. Sagar Maurya , Pranab Dutta , Umakant D. Rapol , Yeshpal Singh

A time resolved experiment to investigate the ultrafast dynamics following an ion impact onto a solid surface requires an ultrashort ion pump pulse in combination with a properly synchronized and time resolved probe. In order to realize…

Atomic Physics · Physics 2023-05-18 P. Kucharczyk , A. Golombek , M. Schleberger , A. Wucher , L. Breuer

We propose a method to identify jets consisting of all the visible remnants of boosted top particles when these decay semileptonically to electrons. Within these jets, the electron shower overlaps with the shower initiated by the $b$ quark,…

High Energy Physics - Phenomenology · Physics 2020-02-03 Suman Chatterjee , Rohini Godbole , Tuhin S. Roy

The operation of a 3D coil--passively driven by the current quench loop voltage--for the deconfinement of runaway electrons is modeled for disruption scenarios in the SPARC and DIII-D tokamaks. Nonlinear MHD modeling is carried out with the…

We present a detailed phenomenological study of charged-current-mediated deep-inelastic scattering off longitudinally polarized nucleons at a future Electron-Ion Collider. A new version of the event generator package DJANGOH, extended by…

High Energy Physics - Phenomenology · Physics 2013-12-16 Elke C. Aschenauer , Thomas Burton , Till Martini , Hubert Spiesberger , Marco Stratmann

Jet quenching and more generally physics at high transverse momentum P_T scales is a cornerstone of the heavy-ion physics program at the LHC. In this work, the current understanding of jet quenching in terms of a QCD shower evolution being…

High Energy Physics - Phenomenology · Physics 2015-06-17 Thorsten Renk

Understanding generation and mitigation of runaway electrons in disruptions is important for the safe operation of future tokamaks. In this paper we investigate runaway dynamics in reactor-scale spherical tokamaks. We study both the…

Plasma Physics · Physics 2023-01-04 E. Berger , I. Pusztai , S. L. Newton , M. Hoppe , O. Vallhagen , A. Fil , T. Fülöp

In the years 2009-2013 the Large Hadron Collider (LHC) has been operated with the top beam energies of 3.5 TeV and 4 TeV per proton (from 2012) instead of the nominal 7 TeV. The currents in the superconducting magnets were reduced…

Isomer depletion via the process of nuclear excitation by inelastic electron scattering is investigated theoretically. A comprehensive study on low-energy nuclear excitations by inelastic electron scattering is performed to analyze the…

Nuclear Theory · Physics 2026-05-08 Ziwen Li , Jingyan Zhao , Xuyang Pu , Yuanbin Wu

In this work quantum electrodynamics at T > 0 is considered. For this purpose we use thermo field dynamics and the causal approach to quantum field theory according to Epstein and Glaser, the latter being a rigorous method to avoid the…

High Energy Physics - Theory · Physics 2007-05-23 Adrian Muller

The feasibility of using antihydrogen for igniting inertial confinement fusion pellets or triggering large scale thermonuclear explosions is investigated. The number of antiproton annihilations required to start a thermonuclear burn wave in…

Plasma Physics · Physics 2007-05-23 Andre Gsponer , Jean-Pierre Hurni

Ballistic injection in a nanodevice is a complex process where electrons can either be transmitted or reflected, thereby introducing deviations from the otherwise quantized conductance. In this context, quantum rings (QRs) appear as model…

Mesoscale and Nanoscale Physics · Physics 2018-08-29 S. Toussaint , B. Brun-Barrière , S. Faniel , L. Desplanque , X. Wallart , V. Bayot , B. Hackens

The type I ELMy H-mode is the baseline operating scenario for ITER. While it is known that the type I ELM ultimately results from the peeling-ballooning instability, there is growing experimental evidence that a mode grows up before the ELM…

Hard partons moving through a dense QCD medium lose energy by radiative emissions and elastic scatterings. Deposition of the radiative contribution into the medium requires rescattering of the radiated gluons. We compute the total energy…

Nuclear Theory · Physics 2009-10-29 G. -Y. Qin , A. Majumder , H. Song , U. Heinz

The CERN Large Hadron Collider (LHC) is designed to collide proton beams of unprecedented energy, in order to extend the frontiers of high-energy particle physics. During the first very successful running period in 2010--2013, the LHC was…

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