Suppression of the Effective Secondary mission Yield for a Grooved Metal Surface

We show t than a flat one. Two d of strong magnetic fie Linear Collider Collaboration Tech Notes act This note documents a set of expressions used to explore the issue of whether or not it is reasonable to er a conventional positron source for a Tesla formatted beam. The critical issue is that of energy deposition in the sion target and the comparison of the induced stress with the ultimate tensile strength of the target material. he length of the incident beam pulse is large in comparison to the ratio of beam size to the speed of sound, the rent pressure pulse dissipates in a time short compared to the overall pulse duration and one is left with only the Suppression of the Effective Secondary mission Yield for a Grooved Metal Surface G. Stupakov and M. Pivi June 2004 Stanford Linear Accelerator Center Stanford Univ rsity 2575 Sand Hil Road Menlo Park, CA hat a grooved surface can have an effective secondary emission yield (SEY) smaller ifferent geometries of grooves—triangular and rectangular—are studied. The effect ld on SEY suppression is also considered. SUPPRESSION OF THE EFFECTIVE SECONDARY EMISSION YIELD FOR A GROOVED METAL SURFACE G. Stupakov and M. Pivi, SLAC, Stanford, USA Abstract We show that a grooved surface can have an effective secondary emission yield (SEY) smaller than a flat one. Two different geometries of grooves—triangular and rectangular—are studied. The effect of strong magnetic field on SEY suppression is also considered.