SRF2009 - List of Authors (Nassiri, R.)

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Nassiri, R.

Paper	Title	Page
THPPO001	Superconducting 5-Cell Cavity Design and Copper Prototype Cavity for an Energy Recovery Linac at the Advanced Photon Source	510
	R. Nassiri AAI/ANL, Argonne Z.C. Liu PKU/IHIP, Beijing G.J. Waldschmidt ANL, Argonne
	We are considering the development of a fourth-generation hard x-ray source to meet future scientific needs of the hard x-ray user community. This work focuses on the design of an optimized 5-cell structure well-suited for a high-energy; high-beam current Energy Recovery Linac. The cavity design parameters are based on the Advanced Photon Source (APS) storage ring nominal 7-GeV and 100-mA beam operation. A high-current 5-cell CW superconducting cavity operating at 1.4 GHz has been designed. In order to achieve high current, the cavity shape has been optimized and large end-cell beam pipes have been adopted. The beam break-up (BBU) threshold of the cavity has been estimated using the code TDBBU1 which indicates a high threshold for a 7-GeV Energy Recovery Linac model. A copper prototype cavity is being fabricated that uses half-cell modules, initially assembled by clamping the cells together. We will report on the cold-model measurements including the higher-order modes and will compare the measurements with the simulation results. * Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

Paper

Title

Page

Superconducting 5-Cell Cavity Design and Copper Prototype Cavity for an Energy Recovery Linac at the Advanced Photon Source

510

R. Nassiri
AAI/ANL, Argonne
Z.C. Liu
PKU/IHIP, Beijing
G.J. Waldschmidt
ANL, Argonne

We are considering the development of a fourth-generation hard x-ray source to meet future scientific needs of the hard x-ray user community. This work focuses on the design of an optimized 5-cell structure well-suited for a high-energy; high-beam current Energy Recovery Linac. The cavity design parameters are based on the Advanced Photon Source (APS) storage ring nominal 7-GeV and 100-mA beam operation. A high-current 5-cell CW superconducting cavity operating at 1.4 GHz has been designed. In order to achieve high current, the cavity shape has been optimized and large end-cell beam pipes have been adopted. The beam break-up (BBU) threshold of the cavity has been estimated using the code TDBBU1 which indicates a high threshold for a 7-GeV Energy Recovery Linac model. A copper prototype cavity is being fabricated that uses half-cell modules, initially assembled by clamping the cells together. We will report on the cold-model measurements including the higher-order modes and will compare the measurements with the simulation results.

* Work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.