PAC2013 - List of Authors (Novokhatski, A.)

Paper	Title	Page
WEPBA08	Wake Fields due to Wall Roughness for Realistic Surfaces	901
	A.V. Fedotov, I. Pinayev BNL, Upton, Long Island, New York, USA A. Novokhatski SLAC, Menlo Park, California, USA
	Funding: Work supported by the U.S. Department of Energy under contract No. DE-AC02-98CH10886 and DE-AC02-76SF00515. Wake fields due to the wall roughness of the vacuum chamber can catch up to the bunch causing energy spread and emittance growth. Several theoretical models were developed in the past which showed rather different importance of this effect. Some models suggest that wake field due to the wall roughness can be minimized if the vacuum chamber surface can be characterized by a large aspect ratio of the surface roughness (characteristic length to the height of surface bumps). To explore these effects several surfaces were measured * and direct numerical simulations were performed for such realistic surfaces. Here we discuss results of such direct simulations for real surface data and compare them with expectations based on analytic models. * Surface measurements used in these studies were performed by P. Takacs from the Instrumentation Division of BNL.

Paper

Title

Page

Wake Fields due to Wall Roughness for Realistic Surfaces

901

A.V. Fedotov, I. Pinayev
BNL, Upton, Long Island, New York, USA
A. Novokhatski
SLAC, Menlo Park, California, USA

Funding: Work supported by the U.S. Department of Energy under contract No. DE-AC02-98CH10886 and DE-AC02-76SF00515.
Wake fields due to the wall roughness of the vacuum chamber can catch up to the bunch causing energy spread and emittance growth. Several theoretical models were developed in the past which showed rather different importance of this effect. Some models suggest that wake field due to the wall roughness can be minimized if the vacuum chamber surface can be characterized by a large aspect ratio of the surface roughness (characteristic length to the height of surface bumps). To explore these effects several surfaces were measured * and direct numerical simulations were performed for such realistic surfaces. Here we discuss results of such direct simulations for real surface data and compare them with expectations based on analytic models.
* Surface measurements used in these studies were performed by P. Takacs from the Instrumentation Division of BNL.