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It is very important to measure the plasma performances of fusion reactors such as fuel ion density, plasma temperature, fusion power, fast neutron energy, and neutron flux. Various diagnostic systems are needed to measure fast neutron…

Nuclear Experiment · Physics 2024-07-10 Iskender Atilla Reyhancan

The Simulation of Cherenkov light lateral distribution function (LDF) from particles of Extensive Air Showers (EAS) with ultra high energy cosmic rays (E>=10^16 eV) was simulated for primary protons by the computer code CORSIKA. The…

General Physics · Physics 2011-04-14 A. A. Al-Rubaiee

Electron cloud effects have become one of the main performance limitations for circular particle accelerators operating with positively-charged beams. Among other machines worldwide, the CERN Super Proton Synchrotron (SPS), as well as the…

Accelerator Physics · Physics 2020-04-22 X. Cui , S. Gilardoni , M. Giovannozzi , G. Iadarola

China Spallation Neutron Source (CSNS) will start commissioning in early 2018. The neutron spectra from the tungsten target bombarding by 1.6 GeV proton beam are very wide, namely white neutron spectra. Two white neutron beams schemed by…

Instrumentation and Detectors · Physics 2018-08-15 W. J. Ni , H. T. Jing , L. Y. Zhang , L Ou

Microdosimetric single event spectra is a significant parameter in radiotherapy, which can be used to evaluate the biological effect of radiation fields. This paper simulated microscopic patterns of energy depositions for mixed radiation…

Medical Physics · Physics 2015-02-03 Chengguo Pang , Junkui Xu , Wuyuan Li , Weiwei Yan , Zeen Yao , Youwu Su

The n_TOF facility at CERN has undergone a major upgrade after the installation of a new spallation target, designed to improve the features of both neutron beamlines at the experimental areas 1 and 2 (EAR1 and EAR2) and the commissioning…

Cosmic muon interactions are important contributors to backgrounds in underground detectors when searching for rare events. Typically neutrons dominate this background as they are particularly difficult to shield and detect in a veto…

Instrumentation and Methods for Astrophysics · Physics 2012-10-10 A. Empl , R. Jasim , E. Hungerford , P. Mosteiro

For a high energy electron facility, the estimates of induced radioactivity in materials are of major importance to keep exposure to personnel and to the environment as low as reasonably achievable. In addition, an accurate prediction of…

Instrumentation and Detectors · Physics 2014-06-10 He Lijuan , Li Yuxiong , Yu Guobing , Ren Guangyi , Duan Zongjin

Nuclear density functional theory provides a unified description of finite nuclei and bulk nuclear matter, and is widely used to model the neutron star equation of state. However, extrapolations to supra-saturation densities require a…

The neutron background spectrum from thermal neutron to 20 MeV fast neutron was measured at the first experimental hall of China Jinping underground laboratory with a Bonner multi-sphere spectrometer. The measurement system was validated by…

Instrumentation and Detectors · Physics 2017-04-26 Qingdong Hu , Hao Ma , Zhi Zeng , Jianping Cheng , Yunhua Chen , Shenming He , Junli Li , Manbin Shen , Shiyong Wu , Qian Yue , Jianfeng Yue , Hui Zhang

An accurate characterization of the neutron fields at spallation sources is crucial for many applications based on neutron irradiations, such as radiation damage tests that need a precise dose estimate. In this work we present the neutron…

Instrumentation and Detectors · Physics 2022-03-16 D. Chiesa , C. Cazzaniga , M. Nastasi , M. Rebai , C. D. Frost , G. Gorini , S. Lilley , S. Pozzi , E. Previtali

We calculated for the nearest active galactic nucleus (AGN), Centaurus A (Cen A), the flux of high energy cosmic rays and of accompanying secondary photons and neutrinos expected from hadronic interactions in the source. We used as two…

Cosmology and Nongalactic Astrophysics · Physics 2009-11-05 M. Kachelriess , S. Ostapchenko , R. Tomas

A fast neutron spectrometer consisting of segmented plastic scintillator and He-3 proportional counters was constructed for the measurement of neutrons in the energy range 1 MeV to 200 MeV. We discuss its design, principles of operation,…

Instrumentation and Detectors · Physics 2014-11-24 T. J. Langford , C. D. Bass , E. J. Beise , H. Breuer , D. K. Erwin , C. R. Heimbach , J. S. Nico

Monitoring the dose delivered during proton and carbon ion therapy is still a matter of research. Among the possible solutions, several exploit the measurement of the single photon emission from nuclear decays induced by the irradiation. To…

Non-thermal emission from relativistic Cosmic Ray (CR) electrons gives insight into the strength and morphology of intra-cluster magnetic fields, as well as providing powerful tracers of structure formation shocks. Emission caused by CR…

High Energy Astrophysical Phenomena · Physics 2023-03-21 Ludwig M. Böss , Ulrich P. Steinwandel , Klaus Dolag , Harald Lesch

Neutron diffusion length in reactor grade graphite is measured both experimentally and theoretically. The experimental work includes Monte Carlo (MC) coding using 'MCNP' and Finite Element Analysis (FEA) coding suing 'COMSOL Multiphysics'…

Nuclear Experiment · Physics 2013-01-10 S. R. Mirfayzi

Electron-positron pairs, produced in intense laser-solid interactions, are diagnosed using magnetic spectrometers with image plates, such as the National Ignition Facility (NIF) Electron Positron Proton Spectrometers (EPPS). Although…

A conceptual scheme of a hybrid-emulsion spectrometer for investigating various channels of neutrino oscillations is proposed. The design emphasizes detection of $\tau$ leptons by detached vertices, reliable identification of electrons, and…

High Energy Physics - Experiment · Physics 2009-10-31 A. E. Asratyan , G. V. Davidenko , A. G. Dolgolenko , V. S. Kaftanov , M. A. Kubantsev , V. S. Verebryusov

We perform global particle-in-cell simulations of pulsar magnetospheres including pair production, ion extraction from the surface, frame dragging corrections, and high energy photon emission and propagation. In the case of oblique…

High Energy Astrophysical Phenomena · Physics 2018-03-28 Alexander A. Philippov , Anatoly Spitkovsky