HB2014 - List of Authors (Blaskiewicz, M.)

Paper

Title

Page

Longitudinal Dynamics Simulation at Transition Crossing in RHIC with New Landau Cavity

37

C. Liu, M. Blaskiewicz, J.M. Brennan, K. Mernick, M.G. Minty, C. Montag, K.S. Smith
BNL, Upton, Long Island, New York, USA

Funding: The work was performed under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
At RHIC, heavy ion beams cross transition energy during acceleration to energies required by the physics programs. In the past, to battle longitudinal instabilities, a Landau cavity was turned on just after acceleration through transition energy. The Landau cavity with modified frequency will be implemented before beam crosses transition in Run-14. Longitudinal dynamics with this new configuration have been simulated to optimize the phase and amplitude of the Landau cavity. We will present simulation results in the report.

WEO1LR01

Instabilities and Space Charge

235

M. Blaskiewicz, K. Mernick
BNL, Upton, Long Island, New York, USA

The coherent stability problem for proton and heavy ion beams is reviewed. For all but the highest energies space charge is the dominant coherent force. While space charge alone appears benign, its interaction with other impedances is less clear. The main assumptions used in calculations and their justifications will be reviewed. Transverse beam transfer function data from RHIC will be used to compare theory and experiment and some pitfalls will be discussed.

Slides WEO1LR01 [1.251 MB]

Paper	Title	Page
MOPAB08	Longitudinal Dynamics Simulation at Transition Crossing in RHIC with New Landau Cavity	37
	C. Liu, M. Blaskiewicz, J.M. Brennan, K. Mernick, M.G. Minty, C. Montag, K.S. Smith BNL, Upton, Long Island, New York, USA
	Funding: The work was performed under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. At RHIC, heavy ion beams cross transition energy during acceleration to energies required by the physics programs. In the past, to battle longitudinal instabilities, a Landau cavity was turned on just after acceleration through transition energy. The Landau cavity with modified frequency will be implemented before beam crosses transition in Run-14. Longitudinal dynamics with this new configuration have been simulated to optimize the phase and amplitude of the Landau cavity. We will present simulation results in the report.

WEO1LR01	Instabilities and Space Charge	235
	M. Blaskiewicz, K. Mernick BNL, Upton, Long Island, New York, USA
	The coherent stability problem for proton and heavy ion beams is reviewed. For all but the highest energies space charge is the dominant coherent force. While space charge alone appears benign, its interaction with other impedances is less clear. The main assumptions used in calculations and their justifications will be reviewed. Transverse beam transfer function data from RHIC will be used to compare theory and experiment and some pitfalls will be discussed.
	Slides WEO1LR01 [1.251 MB]