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A new method is introduced for correcting the biased statistics of measurements with laser‐Doppler velocimeters operating in the individual realization mode and using counters for signal processing. Two variations of the new correction method are proposed. One is suitable for all uniformly...
A feedback‐controlled particle suspension system has been developed for laser target plasma production in the LITE experiment. Suspension voltages derived from position and velocity (position derivative) feedback signals serve to capture an injected particle in high vacuum, damp the particle...
We describe a method for overcoming the tendency of four separately controlled incubators to drift apart in temperature. One incubator acts as a master temperature control; the control circuits of the others sense and eliminate temperature differences between the master and the other incubators.
A carburized 2% thoriated tungsten hairpin‐filament electron source, 0.125 mm in diameter, which operates at 10 kV with a brightness level of 5×10 4 A cm −2 sr −1 and has a rated life time of ≳700 h is described. The operating temperature of ∼1900 K (optical) is about 800 K below that...
An apparatus has been constructed which produces uniform hollow shells of liquid. The techniques used are to ultrasonically excite and inject a gaseous jet into a liquid jet. The physical arrangement consists of dual capillary nozzles with the gas nozzle coaxial to and inside the liquid nozzle....
An apparatus for generating up to ∼3.5 kilobars of hydrostatic pressure from ambient down to liquid helium temperatures has been developed at 35 and 17 GHz. The design incorporates a conical sapphire cavity pressure seal in a piston‐and‐cylinder loaded by a small commercial ram. The use of...
We describe and analyze a transmission experiment developed for measuring total scattering cross sections for low‐energy poistrons (0.3–250 eV) colliding with gases in a region containing a curved, axial magnetic field. It is determined that spiralling does not appreciably increase the beam...
A coaxial microwave ion source which provides high‐current ion beams is presented. The microwave discharge takes place in a magnetic mirror field. The intensity of this field is higher than that of the electron cyclotron resonance at 2.45 GHz over the entire discharge region. The antenna of the...
A simple preretarding lens system is analyzed which involves a parallel‐plate retarder B placed between two cylindrical lens systems A and C. The exact transfer matrix elements for the retarder are developed. The system can deliver fixed‐energy electrons for any input energy by providing...
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