Transverse magnetic field propellant isolator

Abstract

An alternative high voltage propellant isolator for electric propulsion and ground-based ion source applications has been designed and tested. This design employs a transverse magnetic field that increases the breakdown voltage. The design can greatly enhance the operating range of laboratory propellant isolators used for high voltage applications.

On the behavior of micro-spheres in a hydrogen pellet target

“…In this case we do not observe the "egg shells" as described in Ref. [9] which should have been the result if the micro-spheres been partially frozen. To conclude our observations, the micro-spheres must freeze somewhere in between the inlet of the vacuum injection capillary and the skimmer.…”

“…Here, the assumption of a quasi-steady equilibrium give P a = P S , given in Eq. (9). The diffusion coefficient of gas mixture D αβ can be deduced from the kinetic theory as shown in Ref.…”

Spectroscopic absorption measurement of a low-Z plasma

“…A series of experiments has been carried out to obtain the absorption spectra of medium-Z plasmas in the x-ray region by using point projection spectroscopy. [1][2][3][4][5] High precision photoabsorption measurements for medium-Z plasmas have also been performed in the soft x-ray and super extra ultraviolet ͑XUV͒ spectral regimes using grating spectrometers and large area backlight techniques. [6][7][8] The measured spectra have been compared with several different opacity models.…”