| Autor: |
A W Pryor, R N Whittem, J D Milne |
| Rok vydání: |
1962 |
| Předmět: |
|
| Zdroj: |
Journal of Scientific Instruments. 39:237-238 |
| ISSN: |
0950-7671 |
| DOI: |
10.1088/0950-7671/39/5/424 |
| Popis: |
A transistorized circuit is described for controlling the filament current in a surface ionization type mass spectrometer. The circuit works on the principle that variations in ihe filament current cause the light output from a small torch bulb to vary and these light variations are detected by a phototransistor and amplified to control the filament current. The controller maintains a constant rms current. (N.W.R.) |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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