Charge Build-Up Effects in Insulating Phantom Materials

Charge Dynamics in Highly Insulating Space Craft Materials

We present a preliminary report on the theoretical and experimental study of transport models in highly insulating materials. The report is developed in four sections; first we give background on the nature of the problems in space craft charging, the contributions and connections made by the Utah State material physics group. Second we discuss the density of states to explore the connections b...

Effects of Vertical Temperature Gradient on Heavy Gas Dispersion in Build up Area

ewline"> Dispersion of heavy gases is considered to be more hazardous than the passive ones because it takes place more slowly. ...

Sey and Electron Cloud Build-up with Neg Materials

A. Rossi, CERN, Geneva, Switzerland Abstract The LHC room temperature sections will be coated with non-evaporable getter (NEG) materials for, among other reasons, their properties of antimultipactor. Laboratory measurements of secondary electron yields (SEY) of TiZrV NEG coatings have shown that after 2 h heat treatment at 160 and 200 C, the maximum SEY decreases from 2 to below 1.4 and 1.1 res...

Electrical studies of charge build-up and phonon-assisted tunneling in double-barrier materials with very thick spacer layers

For many years it has been realized that the performance of double-barrier material can be enhanced by undoped’ or lightly doped2 spacer layers adjacent to the barriers, which act both to reduce the capacitance of the devices and to prevent excessive diffusion of dopant atoms into the barrier and well layers. Such spacer layers typically range between 1.5 and 50 nm in thickness; while thin laye...

Evaluation of Physical Properties of Different Core Build- up Materials