Results 11 to 20 of about 2,030,078 (295)

Groundwater chemical characteristics and forming reasons of Yuanyanghu Mining Area

open access: yesMeikuang Anquan, 2023
In order to find out the chemical characteristics and causes of groundwater in Yuanyanghu Mining Area, and to provide basis for the prevention and control of water disaster in the mining area, the aquifer hydro-chemistry of Quaternary, Cretaceous, Zhiluo
ZONG Weiqin, ZHAO Baofeng
doaj   +1 more source

Highly Efficient Small Anode Ion Source

open access: yesPlasma, 2021
We describe some modifications to a Bernas-type ion source that improve the ion beam production efficiency and source operating lifetime. The ionization efficiency of a Bernas type ion source has been improved by using a small anode that is a thin rod ...
Vadim Dudnikov, Andrei Dudnikov
doaj   +1 more source

Prediction of Axial Variation of Plasma Potential in Helicon Plasma Source Using Linear Regression Techniques [PDF]

open access: yesInternational Journal of Mathematical, Engineering and Management Sciences, 2020
Analytical expressions are used frequently for the determination and analysis of plasma parameters. Instead of relying on analytical expressions, the proposed method uses regression techniques supplemented with experimental data for the selected ...
Vipin Shukla   +3 more
doaj   +1 more source

Origin and hydrochemical evolution of confined groundwater in Shanghai, China

open access: yesFrontiers in Earth Science, 2023
Confined groundwater is an indispensable resource for the urban security of Shanghai, China, where multi-layer aquifer structures and human activities create a complex groundwater environment.
Guanghui Zhan   +9 more
doaj   +1 more source

Status of CHIP-TRAP: The Central Michigan University High-Precision Penning Trap

open access: yesAtoms, 2023
Precise and accurate atomic mass data provide crucial information for applications in a wide range of fields in physics and beyond, including astrophysics, nuclear structure, particle and neutrino physics, fundamental symmetries, chemistry, and metrology.
Matthew Redshaw   +7 more
doaj   +1 more source

Ion Source—Mathematical Simulation Results versus Experimental Data

open access: yesAerospace, 2021
To develop elements of a system for contact-free transportation of objects in space has now become an urgent task for the contemporary space-related activities.
Victoria V. Svotina   +4 more
doaj   +1 more source

Serum Steroid Ratio Profiles in Prostate Cancer: A New Diagnostic Tool Toward a Personalized Medicine Approach

open access: yesFrontiers in Endocrinology, 2018
BackgroundSerum steroids are crucial molecules altered in prostate cancer (PCa). Mass spectrometry (MS) is currently the elected technology for the analysis of steroids in diverse biological samples.
Adriana Albini   +12 more
doaj   +1 more source

Control system of ECR ion source within FAMA [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2016
Recent upgrading of the Facility for Modification and Analysis of Materials with Ion Beams (FAMA), in the Laboratory of Physics of the Vinča Institute of Nuclear Sciences, included modernization of its electron cyclotron resonance (ECR) ion ...
Trajić Ivan M.   +5 more
doaj   +1 more source

The DCU laser ion source [PDF]

open access: yes, 2010
Laser ion sources are used to generate and deliver highly charged ions of various masses and energies. We present details on the design and basic parameters of the DCU laser ion source (LIS).
Boody F. P.   +4 more
core   +1 more source

Source Dimensions in Ultrarelativistic Heavy Ion Collisions [PDF]

open access: yes, 1994
Recent experiments on pion correlations, interpreted as interferometric measurements of the collision zone, are compared with models that distinguish a prehadronic phase and a hadronic phase.
A.H. Mueller   +37 more
core   +2 more sources

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