Results 21 to 30 of about 4,620,104 (297)

Making pions with laser light

New Journal of Physics, 2018
The interaction of high intensity short pulse laser beams with plasmas can accelerate electrons to energies in excess of a GeV. These electron beams can subsequently be used to generate short-lived particles such as positrons, muons, and pions. In recent
W Schumaker, T Liang, R Clarke, J M Cole, G Grittani, S Kuschel, S P D Mangles, Z Najmudin, K Poder, G Sarri, D Symes, A G R Thomas, M Vargas, M Zepf, K Krushelnick   +14 more
doaj   +1 more source

Chemical composition and source attribution of sub-micrometre aerosol particles in the summertime Arctic lower troposphere [PDF]

Atmospheric Chemistry and Physics, 2021
Aerosol particles impact the Arctic climate system both directly and indirectly by modifying cloud properties, yet our understanding of their vertical distribution, chemical composition, mixing state, and sources in the summertime Arctic is incomplete ...
F. Köllner, F. Köllner, J. Schneider, M. D. Willis, M. D. Willis, H. Schulz, D. Kunkel, H. Bozem, P. Hoor, T. Klimach, F. Helleis, J. Burkart, J. Burkart, W. R. Leaitch, A. A. Aliabadi, A. A. Aliabadi, J. P. D. Abbatt, A. B. Herber, S. Borrmann, S. Borrmann   +19 more
doaj   +1 more source

Quantitative Analysis of Slow-extraction Spill Spectrum and Its Application

Yuanzineng kexue jishu, 2022
Slow extraction from synchrotrons is widely used for delivering hadron beams to many physical experiments as well as hadron cancer therapy based on charged particle deposition on tumors. The extracted beam is also referred to as spill.
YE Wenbo;YAO Hongjuan;YANG Ye;LIU Xiaoyu;LI Yan;ZHENG Shuxin;WANG Xuewu;GUAN Xialing;WANG Minwen;LIU Wolong;WANG Di;WANG Maocheng;ZHAO Mingtong;YAN Yihua;WANG Zhongming
doaj  

Null-Space Monte Carlo Particle Backtracking to Identify Groundwater Tetrachloroethylene Sources

Frontiers in Environmental Science, 2020
Groundwater in most urban areas around the globe is often contaminated by toxic substances. Among the various sources of contamination, industries cause the heaviest impact when toxic compounds are released underground, mainly through leaking tanks or ...
Loris Colombo, Luca Alberti, Pietro Mazzon, Matteo Antelmi   +3 more
doaj   +1 more source

Explaining global surface aerosol number concentrations in terms of primary emissions and particle formation [PDF]

, 2010
We synthesised observations of total particle number (CN) concentration from 36 sites around the world. We found that annual mean CN concentrations are typically 300–2000 cm -3 in the marine boundary layer and free troposphere (FT) and 1000–10 000 cm -3 ...
Mihalopoulos, Nikos, Wiedensohler, Alfred, Andrews, Elisabeth, J. Gras, A. Hamed, Mann, G.W., K. Sellegri, Baltensperger, Urs, Kivekäs, Niku, M. Komppula, A. Laaksonen, Mihalopoulos, Ninolaos, J. Merikanto, A. Wiedensohler, Sun, Junying, Harrison, Roy M., Mihalopoulos, N., Boy, M., Jennings, S. Gerard, Birmili, Wolfram, A. Minikin, P. Laj, Merikanto, J., Ogren, J. A., Ogren, John A., Laakso, Lauri, Weller, Rolf, S. G. Jennings, Reddington, C.L., Pickering, S., R. M. Harrison, Mann, G. W., Kulmala, Markku, Minikin, Andreas, Boy, Michael, Laaksonen, A., M. Kulmala, N. Kivekäs, O'Dowd, C., U. Baltensperger, Carslaw, K.S., L. Laakso, Ogren, J.A., Carslaw, K. S., R. Talbot, Spracklen, D.V., Reddington, Carly L., Talbot, R., K. S. Carslaw, M. Boy, Harrison, R. M.; id_orcid, Andrews, E., W. Birmili, Sellegri, Karine, Lihavainen, Heikki, Gras, J., Krejci, Radovan,, O'Dowd, Colin D., Spracklen, D. V., Sun, Youbin, Baltensperger, U., Krejci, Radek, O'Dowd, Collin D., Komppula, M., Sellegri, K., Talbot, Robert, Kouvarakis, Giorgos, Laj, P., G. W. Mann, Jennings, S.G., Hamed, A., Weingartner, E., Krejci, R., Carslaw, Kenneth S., Lihavainen, H., Wiedensohler, A., Harrison, R. M., Sun, J., Birmili, W., Mann, Graham W., Bonn, B., Kivekäs, N., Komppula, Mika, Spracklen, Dominick V., Merikanto, Joonas, Laj, Paolo, Hamed, Amar, Jennings, S. G., E. Weingartner, Weingartner, Ernest, Laakso, L., J. A. Ogren, Minikin, A., R. Krejci, Gras, John, S. Pickering, Reddington, C. L., Harrison, R.M., Jennings, Stephen G., Pickering, Steven, H. Lihavainen, B. Bonn, C. O'Dowd, Weller, R., Kulmala, M., N. Mihalopoulos, J. Sun, G. Kouvarakis, Kouvarakis, G., E. Andrews, D. V. Spracklen, Bonn, Boris, Lihavainen, H.Finnish Meteorol. Inst.,, Laaksonen, Ari, C. L. Reddington, Krejci, Radovan, Harrison, Roy Michael, R. Weller   +117 more
core   +2 more sources

Receptor modelling of both particle composition and size distribution from a background site in London, UK [PDF]

Atmospheric Chemistry and Physics, 2015
Positive matrix factorisation (PMF) analysis was applied to PM10 chemical composition and particle number size distribution (NSD) data measured at an urban background site (North Kensington) in London, UK, for the whole of 2011 and 2012. The PMF analyses
D. C. S. Beddows, R. M. Harrison, D. C. Green, G. W. Fuller   +3 more
doaj   +1 more source

A Possible Way to Unify Four Types of Interactions: Gravitational, Electromagnetic, Nuclear and Electroweak Interactions by using a Hydrodynamic Analogy [PDF]

INCAS Bulletin, 2022
A principle of equivalence and a unique particle are used for a possible unification of four types of interaction. For gravity, the hydrodynamic analog consists of the interaction of two sources, giving attraction for both emission and absorption.
Corneliu BERBENTE, Sorin BERBENTE, Marius BREBENEL   +2 more
doaj   +1 more source

Particle Sources

, 2021
This paper outlines the many ways that the initial beam can be made for particle accelerators. Brief introductions to plasma physics and beam formation are given. Thermionic and photo emission electron guns, with both DC and Radio Frequency (RF) acceleration are outlined.
openaire   +2 more sources

Pair contact process with a particle source [PDF]

Physical Review E, 2001
We study the phase diagram and critical behavior of the one-dimensional pair contact process (PCP) with a particle source using cluster approximations and extensive simulations. The source creates isolated particles only, not pairs, and so couples not to the order parameter (the pair density) but to a non-ordering field, whose state influences the ...
Dickman, Ronald, Rabelo, Wilson R. M., Odor, Geza   +2 more
openaire   +3 more sources

Sources of particle number concentration and noise near London Gatwick Airport

Environment International, 2022
There is increasing evidence of potential health impacts from both aircraft noise and aircraft-associated ultrafine particles (UFP). Measurements of noise and UFP are however scarce near airports and so their variability and relationship are not well ...
Anja H. Tremper, Calvin Jephcote, John Gulliver, Leon Hibbs, David C. Green, Anna Font, Max Priestman, Anna L. Hansell, Gary W. Fuller   +8 more
doaj   +1 more source