AN INVESTIGATION OF THE ELECTRON COMPONENT OF ELECTRON AVALANCHES IN HOMOGENEOUS FIELDS. PART II (in German)
Electron avalanches in uniform fields are studied by means of a short- duration spark light source. Electron drift velocities v are measured in hydrogen, nitrogen, oxygen, and some vapors. It is shown that in hydrogen and nitrogen the number of electrons increases exponentially by gas amplification with a time constant 1/ alpha v-, in accordance with a conventional assumption and with previous measurements in methane, alpha is the first Townsend coefficient. In oxygen and air it is, however, demonstrated that the number of electrons increases considerably less than exp( alpha v-t), and the multiplication process takes longer time. This is evidently due to time losses of the electrons on their paths across the gap. Thus the mean time interval for successors, started by photons at the cathode, is increased. In addition, details are given of some measurements of the first Townsend coefficient alpha , the electron diffusion coefficient, and ionic drift velocities for certain gases. (auth)
- Research Organization:
- Universitat, Hamburg
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-007920
- OSTI ID:
- 4099841
- Journal Information:
- Z. Physik, Journal Name: Z. Physik Vol. Vol: 160
- Country of Publication:
- Country unknown/Code not available
- Language:
- German
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