Modeling of reduced effective secondary electron emission yield from a velvet surface

Modeling of reduced secondary electron emission yield from a foam or fuzz surface

Calculation of Secondary Electron Emission Yield From MgO Surface

Secondary electron emission yield values for rare-gas particles (He, Ne, Ar, Kr, and Xe ions of atoms and molecules, metastable atoms, and excimers) of MgO deposited under optimum conditions for the highest values were calculated assuming the Auger transitions between the valence band, and the (oxygen ion vacancy + two electrons) and + (oxygen ion vacancy + one electron) centers in the MgO surf...

Suppression of the Effective Secondary Emission Yield for a Grooved Metal Surface∗

Suppression of the secondary electron emission is an important technique of mitigating deleterious effect of the electron cloud in modern accelerators. Several methods are routinely used in practice to lower the secondary emission yield (SEY) which include special coatings of the metal surface, surface cleaning and beam scrubbing. In this paper we study another approach to suppress effective SE...

Influence of the Electric Field on Secondary Electron Emission Yield

We present results of the investigation of secondary electron emission from spherical amorphous carbon grains of 3 to 6 micrometers in diameter affected by a high surface field. In our experiment, we have applied a technique based on levitation of a single charged grain in the quadrupole trap. This grain was charged by an electron beam with an energy tunable up to 10 keV. During this process, t...

Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction

In the beam pipe of the positron damping ring of the Next Linear Collider, electrons will be created by beam interaction with the surrounding vacuum chamber wall and give rise to an electron cloud. Several solutions are possible for avoiding the electron cloud, without changing the bunch structure or the diameter of the vacuum chamber. Some of the currently available solutions for preventing th...