2 edition of cold cathode ion source mass spectrometer employing ion counting techniques found in the catalog.
cold cathode ion source mass spectrometer employing ion counting techniques
Norton Research Corporation.
by National Aeronautics and Space Administration; for sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va. in Washington]
Written in English
|Statement||by F. L. Torney, Jr. [and others.|
|Series||NASA contractor report, NASA CR-1475, NASA contractor report ;, NASA CR-1475.|
|Contributions||Torney, F. L., Langley Research Center.|
|LC Classifications||TL521.3.C6 A3 no. 1475, QC454 A3 no. 1475|
|The Physical Object|
|Pagination||viii, 169, A57, B63 p.|
|Number of Pages||169|
|LC Control Number||74605750|
Electron ionization is widely used in mass spectrometry, particularly for organic molecules. The gas phase reaction producing electron ionization is + − + ∙ + − where M is the atom or molecule being ionized, − is the electron, and + ∙ is the resulting ion. The electrons may be created by an arc discharge between a cathode and an anode.. An electron beam ion source . FAB mass spectrometry, also known as liquid secondary ion mass spectrometry (LSIMS). Fast atom bombardment is a soft ionization source that requires the use of a direct insertion probe for sample .
Ionization Source Technology Overview The process of ionization typically involves placement of the sample into a chamber of the mass spectrometer, where an electron source is located. The ionization occurs when an additional gas, such as methane, isobutene or ammonia, is added to the ion source. 7/9/ 2 Advances in Mass Spectrometry Ion Source Mass Analyzer Detector Ion Source Mass Analyzer Detector vacuum vacuum ‐ Atmospheric Pressure Chemical Ionization (APCI) ‐ Electrospray .
Initial tests were conducted by replacing a microchannel plate ion detector in a matrix-assisted-laser-desorption time-of-flight mass spectrometer (MALDI-TOF-MS) with a STJ detector. In those initial tests we showed that 1) the STJ detector produces pulses appropriate for timing large ions and 2) the height of the pulses is proportional to ion. A cold cathode is a cathode that is not electrically heated by a filament. A cathode may be considered "cold" if it emits more electrons than can be supplied by thermionic emission alone. It is used in gas-discharge lamps, such as neon lamps, discharge tubes, and some types of vacuum other type of cathode is a hot cathode.
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NASA Contractor Report: A Cold Cathode Ion Source Mass Spectrometer Employing Io [Torney, F. L., Jr.; P. Blum, P. Fowler, J. Roehrig] on *FREE* shipping on qualifying offers. NASA Contractor Report: A Cold Cathode Ion Source Mass Spectrometer Employing IoAuthor: J. Roehrig Torney, F. L., Jr.; P.
Blum, P. Fowler. Cold cathode ion source mass spectrometer employing ion counting techniques. Washington] National Aeronautics and Space Administration; for sale by the Clearinghouse for Federal Scientific.
NASA CR A COLD CATHODE ION SOURCE MASS SPECTROMETER EMPLOYING ION COUNTING TECHNIQUES By F. Torney, Jr., P. Blum, P. Fowler, and J. Roehrig Distribution of. The mass spectrometer assembly using the ener-y-selectable ion source. 62 to the stop and the electrode are deflected around the stop and into the mass filter as shown in Fig.
In this way, the source more closely resembles, in its upper energy limit, an electron-input ion source Cited by: 1. Mass Spectrometry- It is an analytical technique that generates charged particles in the form of ions from the substance to be analysed to measure its mass to charge ratio.
Ion Source plays an. The ion source is the component of a mass spectrometer where ionization takes place. Some ion sources, such as electron ionization (EI) and chemical ionization (CI) impose the requirement that the. Cold-spray ionization mass spectrometry: principle and applications to observe by conventional MS techniques, including fast atom bombardment (FAB) and matrix-assisted laser desorp- redirector was ﬁtted to change the characteristics of the ion source.
Mass spectrometry - Mass spectrometry - Ion-trap methods: It is possible to configure electric and magnetic fields so that ions can be held in stable orbits for a period of time long enough to perform useful measurements on them. Two forms of mass spectrometers are derived from this idea, the omegatron and the Fourier-transform spectrometer.
Mass Spectrometer Problem #2 An ion at every mass (grass) What can cause this (in order of likelihood): 1. Contaminated source 2. Dirty source 3. Contaminated/degraded electron multiplier 4.
Different kind of ion sources •Based on their electric power source, magnetic field, temperature of cathode, other characteristic of ion source component •Ion beam diameter, extraction of ion beam, One or more holes or grid •Hot cathode, cold cathode. The process of ionization typically involves placement of the sample into a chamber of the mass spectrometer, where an electron source is located.
A heater may vaporize the sample, after which. Current Mass Spectrometry, Biotech, and Pharma News. Bruker Signs Agreement to Acquire Oncovision's Preclinical PET Imaging Business (09/07); Pfizer Appoints Chief Scientific Officer for.
A schematic diagram of a glow discharge ion source for a magnetic mass spectrometer is shown in Figure The cathode is formed as a metal pin, ca. 2 mm in diameter, mounted on a removable probe. The stainless steel anode contains the ion.
method. Ion source in mass spectroscopy plays a vital role for the generation of ions. M a s s n S p e c t r o m e t r y & Purif ic a t i o n T e c h i q u e s ISSN: Mass Spectrometry & Purification Techniques Medhe, Mass Spectrom Purif TechDOI: / Review Article Open Access Mass.
APPARATUS. The cold sprayer shown in Fig. 1 consists of an electrospray or ion spray ionization probe operating at low temperature.
It features a dry gas (N 2) cooling device to maintain. the use of ion counting techniques. The cold-cathode ion source/Quadrupole mass spectrometer is again used as a test instrument for the investigations reported herein.
"Photon-Blind" Ion Detectors. 2 Ion Chromatography Coupled with Mass Spectrometry for Metabolomics This is a customer submitted application note published as is.
No ISO data available for included figures. Figure 1 outlines the. Vaporisation studies were carried out by employing a high temperature mass spectrometer (HTMS) built in-house. The schematic of the HTMS facility employed in the present work is shown in Fig.
detailed description is given system consists of two chambers, cell chamber housing the Knudsen cell–electron bombardment furnace assembly and the source. A Novel Ion Source and Detector for a Miniature Mass Spectrometer Abstract: Due to its flexibility and sensitivity, mass spectrometry is a preferred sensing method for applications ranging from explosives detection to air quality monitoring.
The key functional elements of a mass spectrometer are ionization, mass separation, and ion. The mass spectrometer consists of three main components, the ion source, the mass analyzer, and the detector. In ion source, a sample is ionized. We are going to introduce several types of ion.
OptiFlowTM Turbo V Ion Source Parts and Equipment Guide for Ion Sources and Mass Spectrometers 4 / 20 RUO-IDVE Introduction 1. WARNING! Personal Injury Hazard.
Use SCIEX -recommended parts only. for Ion Sources and Mass .An improved quadrupole mass spectrometer is described.
The improvement lies in the substitution of the conventional hot filament electron source with a cold cathode field emitter array which in turn. This type of mass analyzer has extremely high mass resolution and is also useful for tandem mass spectrometry experiments.
The FTMS consists of an ion source (in this case an Electrospray ion source), some ion optics to transfer the ions into the magnetic field (in this case an RF-Only Quadrupole ion guide), and the Ion .