Category Archives: Pumping

Development Milestones

Initial studies of nuclear pumping concentrated on molecular gas lasers such as CO2 because early theoretical predictions indicated lasing with low pump (neutron flux) thresholds of ~1010 n/cm2 s [6, 7]. Indeed, experiments at the University of Illinois initiated during this period showed an enhanced output from an electrically excited CO2 laser with nuclear pumping superimposed [11]. Experiments at the […]

Read more

Dynamics of Inhomogeneity Development in the Pulsed and Quasi-Stationary Excitation Modes

Numerical investigations of the dynamics of the development of inhomogeneities during NPL excitation by pulsed neutron fluxes from a TIBR reactor [21] with a duration (at half the exciting pulse height) of t1/2 = 0.8 ms were among the first performed. During experiments [4] on this reactor, the aluminum cylindrical cell employed had an inside diameter of 2.7 cm and […]

Read more

Studies of Condensed-Media NPLs

The most progress in searching for active media for NPLs, studying their charac­teristics, and developing various nuclear-laser devices was achieved when high — pressure gas media were used. However, there have been repeated attempts in Russia and the United States to pump different condensed media with nuclear radiation and carry out feasibility studies on developing powerful nuclear-laser devices based on […]

Read more

Hg Vapor Lasers

The mechanism of a laser operating on the transition 7p2P3/2-7s2S1/2 of the Hg+ ion (A = 615.0 nm) was considered in studies [4, 106, 122]. Populating of the upper laser level 7p2P3/2 occurs as a result of the charge-transfer process He+ + Hg! (Hg+)* + He. For low concentrations of Hg atoms, populating of the level 7p2P3/2 can also occur […]

Read more
1 2 3 4 5 14