Results 251 to 260 of about 2,015,688 (302)
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Dual-Temperature Ion Exchange Fractionation
Solvent Extraction and Ion Exchange, 1999ABSTRACT This paper reviews the results obtained by studying the dual-temperature ion-exchange fractionation (DTIXF) technique. The DTIXF is based on the use of different affinity at different temperatures of ion exchangers towards ions to be separated.
Dmitri Muraviev +2 more
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Relationship between effective temperature of thermalized ions and ion source temperature
International Journal of Mass Spectrometry, 1998Abstract The spontaneous dissociation of mixed proton bound dimers of nitrile bases has been studied using mass-analyzed ion kinetic energy spectra in a reverse geometry double focusing instrument coupled to a high pressure ion source. A linear correlation was found between the relative ion abundance ratios of the fragments and the ion source ...
K. Norrman, T.B. McMahon
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Ion Temperature Measurement Using Ion-Sensitive Probe
Japanese Journal of Applied Physics, 2005The ion current of ion-sensitive probes is investigated on the basis of a numerical analysis of ion orbits. Each ion-sensitive probe investigated in this study consists of a central electrode and a guard electrode, which are biased to an identical potential, V, against ambient plasma.
Akira Tsushima, Yuichi Tayama
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High temperature ion sources with ion confinement
Review of Scientific Instruments, 2002Different types of high temperature ion sources such as surface, laser, and electron beam ionization ion sources have been developed and tested in off-line and on-line experiments. All types of developed ion sources have an essential common feature: an existence of the ion confinement inside the ion source cavity.
V. N. Panteleev +8 more
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Technical Physics, 2002
The kinetics of alkali metal ion emission from metal surfaces heated to temperatures of 800–2500 K is studied. The ion current relaxation is described by the relationship \(I = Ae^{ - B\sqrt t } + {C \mathord{\left/ {\vphantom {C {\sqrt t }}} \right. \kern-\nulldelimiterspace} {\sqrt t }} + I_0 \).
V. I. Batkin, O. Ya. Savchenko
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The kinetics of alkali metal ion emission from metal surfaces heated to temperatures of 800–2500 K is studied. The ion current relaxation is described by the relationship \(I = Ae^{ - B\sqrt t } + {C \mathord{\left/ {\vphantom {C {\sqrt t }}} \right. \kern-\nulldelimiterspace} {\sqrt t }} + I_0 \).
V. I. Batkin, O. Ya. Savchenko
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Review of Scientific Instruments, 1994
A low temperature ion source has been developed to produce a plasma with a low ion temperature and a high plasma density by using a gas contact technique. This ion source is a hybrid type consisting of modified plasma compression type cylindrical hollow cathode plasma source and the gas contact chamber with floating potential mounted on the head of the
Shinichi Tanabe +2 more
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A low temperature ion source has been developed to produce a plasma with a low ion temperature and a high plasma density by using a gas contact technique. This ion source is a hybrid type consisting of modified plasma compression type cylindrical hollow cathode plasma source and the gas contact chamber with floating potential mounted on the head of the
Shinichi Tanabe +2 more
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High-Temperature Ion Implantation in Diamond
Physica Status Solidi (a), 1978C+ and N+ implantation into type IIa diamond are performed at various temperatures (25 to 1000°C) and ion-induced damage is studied by EPR measurements at 1.2 to 300 K. Hot implantation at 1000°C results in a reduced spin density of “amorphous” carbon by an order of magnitude less than that due to cold-implantation and a subsequent annealing at 1000°C.
Y. H. Lee, P. R. Brosious, J. W. Corbett
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Temperature dependence of negative ion lifetimes
The Journal of Chemical Physics, 2007The autodetachment lifetimes of SF6−* and C6F6−* ions formed by charge transfer in K(np)∕SF6, C6F6 collisions are measured as a function of target temperature over the range of ∼300–600K with the aid of time-of-flight techniques and a Penning ion trap. At room temperature only formation of long-lived SF6−* ions with lifetimes τ≳1ms is seen.
M, Cannon +5 more
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TRP ION CHANNELS AND TEMPERATURE SENSATION
Annual Review of Neuroscience, 2006The abilities to sense environmental and internal temperatures are required for survival, both for maintenance of homeostasis and for avoidance of tissue-damaging noxious temperatures. Vertebrates can sense external physical stimuli via specialized classes of neurons in the peripheral nervous system that project to the skin.
Ajay, Dhaka +2 more
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Effective ion temperatures in a quadrupole ion trap
The Journal of Physical Chemistry, 1990The reaction of O 2 .+ with methane is used as a «chemical thermometer» to obtain information concerning effective ion temperatures in a Paul-type quadrupole ion trap using He buffer gas. The rate constant as well as the product distribution indicates an effective temperature of 600-700 K for O 2 .+ ions trapped for long times; i.e., a similar rate
B. D. Nourse, H. I. Kenttamaa
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