Foil moderated radioactive preionization system for gas lasers

Details Foil moderated radioactive preionization system for gas lasers Foil moderated radioactive preionization system for gas lasers

1977-08-19

1979-04-03

Sikes, William L.

Oscillators

Molecular or particle resonant type

H01S 309

Patent

active

041479955

ABSTRACT:
A safe, radioactive preionization system having a thin metallic film or foil, either placed in front of or deposited on the surface of radioactive sources, in order to isolate the radioactive source from laser discharge regions and to produce copious secondary emission electrons. The film or foil prevents bombardment of the radioactive source by discharge electrons and/or ions. In addition, the secondary emission electrons ejected from the metallic film or foil are more numerous than the radioactive decay particles which produce them and have lower energies. Hence, they are much more efficient preionization agents than the high energy particles emitted by the radioactive source.

REFERENCES:
patent: 3935547 (1976-01-01), Riemersma et al.
patent: 3986139 (1976-10-01), Meneely et al.
patent: 4064465 (1977-12-01), Hundstad et al.

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