Download or read book Construction and Calibration of a Neutral Gas Spectrometer with Open Cathodeless Electron impact Ion Source for Density Measurements in the Upper Atmosphere written by H. Trinks and published by . This book was released on 1973 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up to now, a reliable determination of the number density of atomic oxygen in the atmosphere by means of mass spectrometers has not been accomplished. Presumably, losses of O occur at the ion source walls and at the filament. Therefore, a mass spectrometer has been developed having an electron-impact ion source where the electrons are produced by a multiplier together with a UV lamp. To minimize the influence of impacts at the walls, the ion source was designed with a wide open geometry. The spectrometer was calibrated by means of a gas flow method with a gas flow of 50 liters/sec produced by a helium cooled cryopump. Neither oil nor mercury pumps were employed in the system. The calibration results are given, and the calculated mass discrimination curve is discussed and compared with that of a monopole spectrometer using an ion source with a hot filament.
Download or read book Construction and Calibration of a Neutral Gas Spectrometer with Open Cathodeless Electron impact Ion Source for Density Measurements in the Upper Atmosphere written by H. Trinks and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up to now, a reliable determination of the number density of atomic oxygen in the atmosphere by means of mass spectrometers has not been accomplished. Presumably, losses of O occur at the ion source walls and at the filament. Therefore, a mass spectrometer has been developed having an electron-impact ion source where the electrons are produced by a multiplier together with a UV lamp. To minimize the influence of impacts at the walls, the ion source was designed with a wide open geometry. The spectrometer was calibrated by means of a gas flow method with a gas flow of 50 liters/sec produced by a helium cooled cryopump. Neither oil nor mercury pumps were employed in the system. The calibration results are given, and the calculated mass discrimination curve is discussed and compared with that of a monopole spectrometer using an ion source with a hot filament.
Download or read book Book catalog of the Library and Information Services Division written by Environmental Science Information Center. Library and Information Services Division and published by . This book was released on 1977 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Book Catalog of the Library and Information Services Division Author title series indexes written by Environmental Science Information Center. Library and Information Services Division and published by . This book was released on 1977 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1974 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Catalogs of the Scripps Institution of Oceanography Library written by Scripps Institution of Oceanography. Library and published by . This book was released on 1980 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1973 with total page 1726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1973 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Book Catalog of the Library and Information Services Division Subject index written by Environmental Science Information Center. Library and Information Services Division and published by . This book was released on 1977 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Feasibility Study of Ion Implantation Techniques for Mass Spectrometer Calibration written by and published by . This book was released on 1978 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was undertaken to examine the feasibility of using ion-implanted filaments doped with either an alkali metal or noble gas for in situ recalibration of onboard mass spectrometers during extended space missions. Implants of rubidium and krypton in rhenium ribbon filaments were subsequently tested in a bakeable 60 deg sector mass spectrometer operating in the static mode. Surface ionization and electron impact ion sources were both used, each yielding satisfactory results. The metallic implant with subsequent ionization provided a means of mass scale calibration and determination of system operating parameters, whereas the noble gas thermally desorbed into the system was more suited for partial pressure and sensitivity determinations.
Download or read book Meteorological and Geoastrophysical Abstracts written by and published by . This book was released on 1974 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Construction and Calibration of a Mass Spectrometer for the Analysis of Light Ions written by and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A magnetic mass spectrometer employing a 45 degree bending angle was constructed and calibrated as part of an experimental apparatus to study ion-molecule rearrangement collisions. It has a resolution (m/delta m) of about 40 with beam transmission in excess of 90%, and it will mass analyze charged particles up to mass number 40 with energies up to 1 KEV. The spectrometer, using a magnet current of 8 amps, has a maximum field strength of about 4 Kilogauss confined between 40 degrees wedge sector shaped pole pieces with a 3/4 in. gap width. Magnet current curves are given for mass analysis of ions through mass number 7 as a function of kinetic energy. A plasma source using electron-impact ionization was used to generate the ion beams of mass 1 to 4 while a thermal Beta-eucryptite source was used to produce Li+ beams of mass 6 and 7. Measurements of the energy spread of the ion beams indicate a typical value of delta E/E = 4% for the gas source and 1% for the thermal emitter. (Author).
Download or read book Construction and Calibration of a Mass Spectrometer for the Analysis of Light Ions written by George Henry Jr Strohsahl and published by . This book was released on 1967 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: A magnetic mass spectrometer employing a 45 degree bending angle was constructed and calibrated as part of an experimental apparatus to study ion-molecule rearrangement collisions. It has a resolution (m/delta m) of about 40 with beam transmission in excess of 90%, and it will mass analyze charged particles up to mass number 40 with energies up to 1 KEV. The spectrometer, using a magnet current of 8 amps, has a maximum field strength of about 4 Kilogauss confined between 40 degrees wedge sector shaped pole pieces with a 3/4 in. gap width. Magnet current curves are given for mass analysis of ions through mass number 7 as a function of kinetic energy. A plasma source using electron-impact ionization was used to generate the ion beams of mass 1 to 4 while a thermal Beta-eucryptite source was used to produce Li+ beams of mass 6 and 7. Measurements of the energy spread of the ion beams indicate a typical value of delta E/E = 4% for the gas source and 1% for the thermal emitter. (Author).
Download or read book The Development and Calibration of a New Mass Spectrometer for Upper Atmospheric Research written by Heidi Lynn Kennedy Manning and published by . This book was released on 1995 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calibration of a Mass Spectrometer and Preliminary Investigation of a Newly Constructed Ion Source written by Richard Baessler Herr and published by . This book was released on 1960 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Two Gas Atmosphere Sensor System mass Spectrometer written by Perkin-Elmer Corporation and published by . This book was released on 1970 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
