Results 31 to 40 of about 4,620,104 (297)

An overview of negative hydrogen ion sources for accelerators

open access: yesNew Journal of Physics, 2018
An overview of high current (>1 mA) negative hydrogen ion (H ^– ) sources that are currently used on particle accelerators. The current understanding of how H ^– ions are produced is summarised. Issues relating to caesium usage are explored.
Dan Faircloth, Scott Lawrie
doaj   +1 more source

Source apportionment of fine PM and sub-micron particle number concentrations at a regional background site in the western Mediterranean: a 2.5 year study [PDF]

open access: yesAtmospheric Chemistry and Physics, 2013
The chemical composition and sources of ambient fine particulate matter (PM1) over a period of 2.5 years for a regional background site in the western Mediterranean are presented in this work.
M. Cusack   +4 more
doaj   +1 more source

Review of particle physics

open access: yes, 2004
This biennial Review summarizes much of Particle Physics. Using data from previous editions, plus 1726 new measurements from 512 papers, we list, evaluate, and average measured properties of gauge bosons, leptons, quarks, mesons, and baryons.
Particle Data Group, Particle Data Grp
core   +1 more source

Bioaerosols as indicators of central Arctic ice nucleating particle sources [PDF]

open access: yesAtmospheric Chemistry and Physics
The Arctic is warming at a rapid rate, with implications for microbial communities as the ecosystems change. Some microbes and biogenic materials can affect the persistence of long-lived mixed-phase clouds by serving as ice nucleating particles (INPs ...
K. R. Barry   +6 more
doaj   +1 more source

A New Insight into Electron Acceleration Properties from Theoretical Modeling of Double-peaked Radio Light Curves in Core-collapse Supernovae

open access: yesThe Astrophysical Journal, 2023
It is recognized that some core-collapse supernovae (SNe) show a double-peaked radio light curve within a few years since the explosion. A shell of circumstellar medium (CSM) detached from the SN progenitor has been considered to play a viable role in ...
Tomoki Matsuoka   +3 more
doaj   +1 more source

Stable carbon and radiocarbon isotope compositions of particle size fractions to determine origins of sedimentary organic matter in an estuary [PDF]

open access: yes, 2002
Stable and radioactive carbon isotopic compositions of particle size fractions of a surface sediment from the Ems-Dollard estuary vary considerably with particle size. The organic material in the fine fractions (
Megens, L.,   +7 more
core   +1 more source

Accurate angle-of-arrival measurement using particle swarm optimization [PDF]

open access: yes, 2010
As one of the major methods for location positioning, angle-of-arrival (AOA) estimation is a significant technology in radar, sonar, radio astronomy, and mobile communications.
Ho, Kwok Shun, Hayward, G., Li, M.
core   +4 more sources

Classical trajectory Monte Carlo simulation of plasma fueling using magnetic plasma expulsion

open access: yesAIP Advances, 2019
The possibility of fueling a magnetically confined plasma using particle sources located inside of the plasma is studied by computer simulation. Magnetic plasma expulsion [R. E. Phillips and C. A. Ordonez, Phys.
A. Martinez, C. A. Ordonez
doaj   +1 more source

Particle Acceleration in Mildly Relativistic Outflows of Fast Energetic Transient Sources

open access: yesUniverse, 2022
Recent discovery of fast blue optical transients (FBOTs)—a new class of energetic transient sources—can shed light on the long-standing problem of supernova—long gamma-ray burst connections.
Andrei Bykov   +2 more
doaj   +1 more source

Decay-phase aerosol dynamics of an indoor particle source have a significant role in exposure analysis [PDF]

open access: yesAerosol Research
Indoor particle sources have been recognized as major contributors to aerosol particle exposure, posing a health risk, particularly to people spending much of their time indoors.
K. Vesisenaho   +4 more
doaj   +1 more source

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