Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Ross L. Spencer"'
Autor:
Ross L. Spencer, Paul B. Farnsworth
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 134:105-122
Quantitative accuracy and high sensitivity in inductively coupled plasma mass spectrometry (ICP-MS) depend on consistent and efficient extraction and transport of analyte ions from an inductively coupled plasma to a mass analyzer, where they are sort
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2cf9f640b8aff98a3e7f302e7050832c
https://doi.org/10.1016/j.sab.2017.06.009
https://doi.org/10.1016/j.sab.2017.06.009
Publikováno v:
Journal of Analytical Atomic Spectrometry. 32:2407-2415
We present a computational simulation of a helium DC glow discharge used as an ambient desorption/ionization source for mass spectrometry. Both the fluid dynamics of the flowing gases and the kinetics of the chemical reactions are modeled. The simula
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e1fca1f740bb7ae46a0b84f3c4bb964
https://doi.org/10.1039/c7ja00242d
https://doi.org/10.1039/c7ja00242d
Autor:
Ross L. Spencer, Quinton McKnight, Scott Bergeson, A. Diaw, Michael S. Murillo, Tucker Sprenkle, Adam Dodson
Transport properties of high-energy-density plasmas are influenced by the ion collision rate. Traditionally, this rate involves the Coulomb logarithm, $\ln\Lambda$. Typical values of $\ln\Lambda$ are $\approx 10~\mbox{to}~20$ in kinetic theories wher
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27517dba548f81367cd601a94d711ae6
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. 64:3113-3120
This paper presents a new method for calculating the cavity modes of cylindrically symmetric cavities and applies the method to stacked dielectric resonators (DRs) inside a conducting cylindrical shell. The modes of an arbitrary cavity are expressed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::956099ff30717c6480029e526bd66524
https://doi.org/10.1109/tmtt.2016.2598172
https://doi.org/10.1109/tmtt.2016.2598172
Publikováno v:
J. Anal. At. Spectrom.. 29:644-656
Pulsed laser radiation was directed at an inductively coupled plasma containing a high concentration of an alkaline earth matrix and a lower concentration of a test analyte. When the laser was tuned to an ionic resonance line of the matrix there was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9d23705aa0879be05e310098cdc4e73
https://doi.org/10.1039/c3ja50352f
https://doi.org/10.1039/c3ja50352f
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 64:921-924
Experimentally-determined flow velocities in the 6 mm upstream from the sampling cone of an inductively coupled plasma mass spectrometer were compared with velocities determined from a computer simulation of the flow and those calculated from a modif
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::281785c7b77a932cffd2f931b21795f4
https://doi.org/10.1016/j.sab.2009.08.001
https://doi.org/10.1016/j.sab.2009.08.001
Autor:
Jeffrey H. Macedone, Ross L. Spencer, Haibin Ma, Nicholas Taylor, W. Neil Radicic, Paul B. Farnsworth
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 64:905-910
Velocities of argon atoms and calcium ions were measured in the first vacuum stage of an inductively coupled plasma mass spectrometer using high-resolution laser-excited fluorescence spectroscopy. The calcium ions reached terminal velocities in the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d6cdd8e224b407d913e7d09c56e0576
https://doi.org/10.1016/j.sab.2009.07.020
https://doi.org/10.1016/j.sab.2009.07.020
Autor:
Ross L. Spencer, Jaron T. Krogel, Adam Payne, William Somers, Andrew Sampson, Charles N. Woods, Jamie Palmer
Publikováno v:
Spectrochimica Acta Part B: Atomic Spectroscopy. 64:215-221
The Direct Simulation Monte Carlo algorithm has been applied to the flow of neutral argon gas through the first vacuum stage of the Inductively Coupled Plasma Mass Spectrometer. Good agreement is found between the simulation results and the equations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a0ca904b00c05f52242c6b3b9da33a3
https://doi.org/10.1016/j.sab.2009.01.003
https://doi.org/10.1016/j.sab.2009.01.003
Autor:
Ross L. Spencer
Publikováno v:
Physics of Plasmas. 11:5356-5359
The m=1 diocotron mode in non-neutral plasmas has long been thought of as a shifted equilibrium, and its frequency has been approximately calculated in this way by Fine and Driscoll [Phys. Plasmas 5, 601 (1998)]. This article shows that this idea can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c381860499c67bcf729850cf08ce3b7c
https://doi.org/10.1063/1.1803840
https://doi.org/10.1063/1.1803840
Publikováno v:
Physics of Plasmas. 10:2738-2747
The nonlinear interaction of the two lowest Trivelpiece–Gould modes in a non-neutral plasma has been observed. Because of coupling in the nonlinear terms of the continuity and momentum equations, the two modes can exchange energy and convert one to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b3f3da4250af3a4e71540bb449840d7
https://doi.org/10.1063/1.1581882
https://doi.org/10.1063/1.1581882