No. # 121 Determination of Hollow Cathode Plasma Contactor System Requirements using an Electrodynamic Tether System Simulation Tool One application of bare electrodynamic tether systems is to deorbit spent satellites and debris from Low-Earth Orbit. In these systems a hollow cathode plasma contactor sub-system is used to form a plasma bridge between one end of the tether and the space plasma i...

Behavior of the xenon dispenser hollow cathode is complex, exhibiting high ion emission and plume erosion rates, and unusual particle energy distributions. A flight-type hollow cathode was characterized with and without an external extraction electrode. Measurements involved a retarding potential analyzer, quadrupole mass spectrometer, and Langmuir probe. The far-field energy, flux, and charge ...

Aims. SPIRou is a near-infrared (nIR) spectropolarimeter at the CFHT, covering YJHK nIR spectral bands (980?2350 nm). We describe development and current status of wavelength calibration in order to obtain precise radial velocities (RVs) nIR. Methods. make use UNe hollow-cathode lamp Fabry-Pérot étalon calibrate pixel-wavelength correspondence for SPIRou. Different methods are developed identif...

Aims. We present a new list of thorium and argon emission lines in the visible obtained by analyzing high-resolution (R = 110, 000) spectra of a ThAr hollow cathode lamp. The aim of this new line list is to allow significant improvements in the quality of wavelength calibration for medium-to high-resolution astronomical spectrographs. Methods. We use a series of ThAr lamp exposures obtained wit...

Basing on the pseudospark discharge, a low pressure gas discharge in a special geometry, fast closing switches for different pulsed power applications have been designed. Medium power PSS (< 30 kA peak current) were used in laser circuits whereas high current PSS are tested successfully in high current pulsed power applications (< 200 kA). For currents of a few kA the discharge is supported by ...