FEL2009 - List of Authors (Nause, A.)

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Nause, A.

Paper	Title	Page
MOPC01	3D Simulations Proof Shot Noise Control and Reduction by Collective Coulomb Interaction	35
	A. Nause, E. Dyunin, A. Gover University of Tel-Aviv, Faculty of Engineering, Tel-Aviv
	The possibility to control optical frequency current shot-noise by longitudinal collective interaction in an electron beams was suggested recently, based on an extended 1D (single Langmuir mode) model.[1] This model predicts the possibility to reduce the beam current-noise below the classical shot-noise level. 3D simulations in GPT were executed in order to verify the predicted current shot noise reduction. It was verified numerically that minimal current shot-noise is attainable in a drift length of quarter wavelength oscillation. However the attainment of the effect requires proper setting of the beam geometrical and current density parameters to avoid interference of higher order Langmuir modes.[2] The parameters range of which the single mode model is valid and the deterioration effects out of this range were determined. Parameters for future experiments are suggested. This process may be applicable for controlling microbunching instabilities and FEL coherence enhancement. [1] A. Gover, PRL 102, 154801 (2009). [2] M. Venturini, Phys. Rev. ST Accel. Beams 11, 034401(2008).

Paper

Title

Page

3D Simulations Proof Shot Noise Control and Reduction by Collective Coulomb Interaction

A. Nause, E. Dyunin, A. Gover
University of Tel-Aviv, Faculty of Engineering, Tel-Aviv

The possibility to control optical frequency current shot-noise by longitudinal collective interaction in an electron beams was suggested recently, based on an extended 1D (single Langmuir mode) model.[1] This model predicts the possibility to reduce the beam current-noise below the classical shot-noise level. 3D simulations in GPT were executed in order to verify the predicted current shot noise reduction. It was verified numerically that minimal current shot-noise is attainable in a drift length of quarter wavelength oscillation. However the attainment of the effect requires proper setting of the beam geometrical and current density parameters to avoid interference of higher order Langmuir modes.[2] The parameters range of which the single mode model is valid and the deterioration effects out of this range were determined. Parameters for future experiments are suggested. This process may be applicable for controlling microbunching instabilities and FEL coherence enhancement.

[1] A. Gover, PRL 102, 154801 (2009).
[2] M. Venturini, Phys. Rev. ST Accel. Beams 11, 034401(2008).