A THEORETICAL AND EXPERIMENTAL ANALYSIS OF AN EIGHTEEN STAGE RADIO-FREQUENCY MASS SPECTROMETER,
Abstract
An eighteen stage radio-frequency mass spectrometer has been designed and constructed for use in the 2-meter grazing incidence vacuum monochromator existing at USC, and a thorough study regarding its operational characterisitics was made. The values of maximum energy gain G sub m and the tuning frequency f were obtained experimentally. A method has been described for taking into consideration the errors introduced by small variations in the output signal voltage of the radio-frequency oscillator. Simultaneous measurements of resolving power and relative transmission showed that the instrument gave best performance for V sub s/ V sub i between 0.06 and 0.11. Due to the instability in the output of the radiofrequency oscillator and the weak nature of the ionizing source, light from a hydrogen glow discharge, it was not possible to operate the instrument at values of V sub r higher that 95% of maximum energy gain. The performance of this instrument seems to be better than the three stage Bennet type analyzer used by Herzog and Marmo, with a similar ionization source. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1962
- Accession Number
- AD0431132
Entities
People
- Gurdev Singh Bajwa
Organizations
- University of Southern California