Mass-Spectrometric Studies of Graphite Vaporization at High Temperatures.
Abstract
The recently completed nuclide mass spectrometer - RF heater - high pressure molecular beam system has been undergoing final tests preparatory to looking for the onset of continuum effects in the vaporization of graphite. An unexpected general modulating of background peaks in the Nuclide ion source, in the presence of strong modulated molecular beams has been partially characterized. Initial RF heating of graphite revealed that a combination of outgassing and poor pumping speed at the graphite specimen were causing pressure building and destructive gaseous discharges. Free evaporations of silver and graphite were carried out, the former study to calibrate the system sensitivity and the latter to search for graphite species and determine heating limitations. Temperature limitations and possibly scattering of the beam, caused by outgassing problems, prevented detection of carbon species, but observations on Ag and Ag2 were in qualitative agreement with literature results. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 06, 1970
- Accession Number
- AD0865314
Entities
People
- Frank T. Greene
- Stephen L. Bennett
- Thomas A. Milne
Organizations
- MRIGlobal