Conferences related to Mass spectroscopy

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2021 IEEE Photovoltaic Specialists Conference (PVSC)

Photovoltaic materials, devices, systems and related science and technology


2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE


2020 IEEE 21st International Conference on Vacuum Electronics (IVEC)

Technical presentations will range from the fundamental physics of electron emission and modulated electron beams to the design and operation of devices at UHF to THz frequencies, theory and computational tool development, active and passive components, systems, and supporting technologies.System developers will find that IVEC provides a unique snapshot of the current state-of-the-art in vacuum electron devices. These devices continue to provide unmatched power and performance for advanced electromagnetic systems, particularly in the challenging frequency regimes of millimeter-wave and THz electronics.Plenary talks will provide insights into the history, the broad spectrum of fundamental physics, the scientific issues, and the technological applications driving the current directions in vacuum electronics research.


2020 IEEE 29th International Symposium on Industrial Electronics (ISIE)

ISIE focuses on advancements in knowledge, new methods, and technologies relevant to industrial electronics, along with their applications and future developments.


2020 IEEE 70th Electronic Components and Technology Conference (ECTC)

ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.


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Periodicals related to Mass spectroscopy

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Aerospace and Electronic Systems Magazine, IEEE

The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.


Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Components and Packaging Technologies, IEEE Transactions on

Component parts, hybrid microelectronics, materials, packaging techniques, and manufacturing technology.


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Xplore Articles related to Mass spectroscopy

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Mass spectrometer studies of hydrogen desorption from hydrided NdFeB powder

1990 IEEE International Magnetics Conference (INTERMAG), 1990

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Study of beam brightness in a radial extraction rf ion source with injected electrons

IEEE Conference Record - Abstracts. 1991 IEEE International Conference on Plasma Science, 1991

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Correspondence between sheet resistance and emitter profile of phosphorus diffused emitters from a spray-on dopant

Conference Record of the Thirty-first IEEE Photovoltaic Specialists Conference, 2005., 2005

The evolution of the emitter sheet resistance upon phosphorus in-diffusion from a spray-on dopant has been studied in the temperature range 840-990 /spl deg/C. In complement with investigations of emitter diffusion profiles, by both electrochemical capacitance-voltage profiling and secondary ion mass spectrometry, we find that the sheet resistance is determined directly by the depth of the flat plateau near the ...


Species composition in a CO<inf>2</inf>laser discharge

IEEE Journal of Quantum Electronics, 1973

Recent experimental studies have shown that small quantities of nitrogen oxides can seriously effect discharge stability and power output in flowing CO2discharge lasers. In the present study, the formation of these oxides was measured in a sealed-off discharge tube under operating conditions similar to those in CO2lasers. The gas composition was sampled with a modulated molecular beam, low-voltage ionizer, quadrupole ...


Platinum-doped nanogranular-tin dioxide layers prepared by spin-coating from colloidal dispersions as basis for gradient gas sensor micro arrays

SENSORS, 2004 IEEE, 2004

Gradient micro arrays of the KAMINA type (Karlsruher Mikronase) were equipped for the first time with thin films of Pt-doped SnO/sub 2/ nano-particles. The nano-granular films were prepared from an aqueous colloidal dispersion by spin-coating subsequent to photolithographic structuring of a 3" silicon wafer, opening up 26 windows for the metal oxide deposition. The platinum was introduced by adding ammonium ...


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Educational Resources on Mass spectroscopy

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IEEE-USA E-Books

  • Mass spectrometer studies of hydrogen desorption from hydrided NdFeB powder

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  • Study of beam brightness in a radial extraction rf ion source with injected electrons

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  • Correspondence between sheet resistance and emitter profile of phosphorus diffused emitters from a spray-on dopant

    The evolution of the emitter sheet resistance upon phosphorus in-diffusion from a spray-on dopant has been studied in the temperature range 840-990 /spl deg/C. In complement with investigations of emitter diffusion profiles, by both electrochemical capacitance-voltage profiling and secondary ion mass spectrometry, we find that the sheet resistance is determined directly by the depth of the flat plateau near the surface in profiles of electrically active phosphorus. Thus, with respect to sheet resistance, an emitter can be regarded as a constant concentration abrupt box layer, with thickness and concentration specified by the flat plateau, irrespective of the actual profile at lower concentrations. Therefore, independent optimization of the emitter profile at lower concentrations is enabled.

  • Species composition in a CO<inf>2</inf>laser discharge

    Recent experimental studies have shown that small quantities of nitrogen oxides can seriously effect discharge stability and power output in flowing CO2discharge lasers. In the present study, the formation of these oxides was measured in a sealed-off discharge tube under operating conditions similar to those in CO2lasers. The gas composition was sampled with a modulated molecular beam, low-voltage ionizer, quadrupole mass spectrometer. The combined use of low ionizer voltage and phase sensitive detection eliminated extraneous mass peaks caused by background gases and dissociative ionization in the analyzer itself. Equilibrium and time-varying measurements were made of neutral and ionix species. Two initial gas compositions were used 1) 71.8 percent He, 15.5 percent N2, 12.7 percent CO2, and 2) 87.2 percent He, 12.8 percent CO2. Measurements were made in a discharge tube 2.2 cm inside diameter, 26 cm between electrodes. The system was pumped to approximately 10-6mm Hg between data runs. Total pressure was varied from 1 to 8 mm Hg and discharge current from 0 to 80 mA. Typical CO2dissociation data at 40 mA and 4 mm Hg indicate an initial rate of7(\pm0.5) \times 10^{-2}s-1with an equilibrium value of approximately 65 percent dissociation in the He/ N2/CO2mixture and slightly lower vatues in the He/CO2mixture. Under the same conditions, nitric oxide (NO) exhibited a buildup rate of8(\pm1) \times 10^{-2}s-1with an equilibrium value of approximately 0.1 percent of total gas composition. Nitrogen diozide (NO2) was detected by comparing the relative amounts of mass numbers 45 and 46. Data indicate that in the He/N2/ CO2mixture the NO2component of mass 46 can be as high as 0.12 percent of total mixture with an initial buildup rate of7(\pm2) \times 10^{-2}s-1at 80 mA discharge current. Measurement of the ion spectra at the cathode indicate that CO2+ is the major initial ion in the He/N2/CO2mixture, but decays with a rate of2.5 (\pm.5) \times 10^{-1}s-1and is replaced by NO+at approximately the same rate. In the He/CO2mixture CO2+ is replaced as the major ion by O2+ , with with slightly lower rates than those measured in the mixtures containing N2.

  • Platinum-doped nanogranular-tin dioxide layers prepared by spin-coating from colloidal dispersions as basis for gradient gas sensor micro arrays

    Gradient micro arrays of the KAMINA type (Karlsruher Mikronase) were equipped for the first time with thin films of Pt-doped SnO/sub 2/ nano-particles. The nano-granular films were prepared from an aqueous colloidal dispersion by spin-coating subsequent to photolithographic structuring of a 3" silicon wafer, opening up 26 windows for the metal oxide deposition. The platinum was introduced by adding ammonium tetrachloroplatinate to the colloidal dispersion. Because of the poor wettability of the substrate, a non-ionic surfactant had to be used. After annealing at 400/spl deg/C a mean particle size between 20 and 25 nm was determined with field emission scanning electron microcopy (FE-SEM). Depth resolved analysis with secondary neutral mass spectrometry (SNMS) proved the platinum content of ca. 1 at%. Investigations of the gas-analytical performance of the gradient micro arrays revealed a detection limit below 10 ppb for 2-propanol. The response times were found to be in the range of a few seconds.

  • Influence of Acetylating Bi-amine Chain Extenders on the Properties of Polyurea

    In this paper, hexamethylene-diamine(HAD) and m-phenylene diamine (m-PDA) were acetified to decrease the reaction activity of synthesizing polyureas and improve their properties. Novel sterically hindered chain extenders, diacetyl hexamethylene-diamine(MHAD) and diacetyl m-phenylenediamine (Mm-PDA) were synthesized with HAD, m-PDA and glacial acetic acid in the presence of phosphoric acid. Their chemical structures were confirmed through FTIR, Kjeldahl Nitrogen Determination method, High resolution ESI-FTICR mass spectrometry and 1H-NMR analysis. The results of measuring their melting stages showed that the purity of products was better. Polyureas were synthesized by two-step solution process of 4,4'-diphenyl diisocyanate(MDI) and amine terminated polyether(Jeffamine D-2000) with different chain extenders. The influence of modified diamine chain extenders on the gel time of the polyurea was investigated. The gel time was prolonged, that is, the reaction activity was decreased when MHAD and Mm-PDA were used as chain extenders instead of HAD and m-PDA. Thermal stability of polyureas was not affected, and their mechanical properties were heightened remarkably.

  • Two-dimensional modeling of a glow discharge source for mass spectrometry

    Summary form only given. Glow discharge mass spectrometry (GDMS) is now widely used for elemental analysis of various materials. This diagnostic uses a low current discharge in a buffer gas to sputter atoms from a sample to be analyzed. A small density of atoms of the sample are thus introduced into the gas phase. These atoms are ionized in the discharge, and the ions are extracted through a small, rectangular slit leading to a mass spectrometer. Very low absolute detection limits are possible with GDMS's, but many aspects of this diagnostic still require carefully adjustments to achieve good performance. A better understanding especially of the influence of the discharge operating conditions (pressure, current, geometry, ...) on the ion fluxes arriving at the plane of the exit slit is needed. The purpose of the work presented here is to develop such an understanding through a combined experimental and theoretical program, but the work reported here relates mainly to results from the model. The particular conditions we have chosen to study correspond to the commercially available VG9000 spectrometer and Megacell source.

  • Dopant redistribution induced by Ni silicidation at 300/spl deg/C

    The dopant (arsenic and boron) redistribution induced by Ni silicidation at 300/spl deg/C is investigated by cross-section transmission electron microscopy and secondary ion mass spectroscopy. The dopant segregation at silicide/Si interface is observed. Also a high concentration dopant peak near silicide surface is revealed and attributed to void layer formation due to Kirkendall voiding effect and volume reduction after silicidation. The re- segregation during the conversion from Ni/sub 2/Si to NiSi contributes an extra boron peak in the middle region of the formed silicide film on P+/N Si.

  • Profile analysis of a 0.25 /spl mu/m CMOS process

    A complete set of doping profiles for a SEMATECH 0.25 /spl mu/m CMOS/DRAM model process were implanted into 200 mm wafers with a 9500/spl times/R implanter. The implants ranged in energy from 10 to 600 keV over a dose range from 7/spl times/10/sup 11/ to 3/spl times/10/sup 15/ ions/cm/sup 2/. The profiles were analyzed with an array of SIMS and SRP and junction staining techniques. Both as-implanted and annealed profiles were measured.

  • Latest advances in laser surgery

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