INVESTIGATION OF THE ENERGY DISTRIBUTION OF COAXIAL-SOURCE HYDROGEN PLASMA,
Abstract
Energy partition in the hydrogen plasma produced in a coaxial gun is investigated in an apparatus that includes an ion energy spectrum analyzer. The plasma gun operates at 80 ka and the current period is 0.000013 sec. An active impedance reduces the third half-period to 10% of the initial amplitude. 0.8 cc of hydrogen gas is injected into the highly evacuated chamber at various intervals before the application of the voltage pulse to the gun electrodes. The ions generated in the discharge are analyzed in the ion energy detector using the magnetic field to produce selective deflection of the ions and the ion current is detected by CsI crystal optically coupled to a photomultiplier. This detector was also used to determine the time of formation of the ions in the gun by determining the time between the start of the discharge and the peak of the ion current. The energy spectrum for H1(+) ions for delay times of 0.000085 to 0.000285 sec is given. Additionally, it is shown that for short delays (85 per sec) the dominating spectrum occurs during the current maximum. For longer delays, the emergence of spectrum is delayed also. The observations are carried out for both polarities of the axial electrodes. Some difference in the spectrum is observed. Both polarities give a two-peak distribution for the shortest delay times. The major peaks occur at 10 kev. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 11, 1967
- Accession Number
- AD0668057
Entities
People
- A. B. Rastrepin
- I. M. Zolototrubov
- I. P. Skoblik
Organizations
- National Air and Space Intelligence Center