IPAC2013 - List of Authors (Gjonaj, E.)

Paper	Title	Page
TUPWA008	Computation of Wakefields for an In-vacuum Undulator at PETRA III	1736
	E. Gjonaj, L. Lünzer, T. Weiland TEMF, TU Darmstadt, Darmstadt, Germany R. Wanzenberg DESY, Hamburg, Germany
	Funding: Work supported by DESY, Hamburg, Germany At DESY the installation of an in-vacuum undulator at the synchrotron radiation facility PETRA III is under consideration. The moveable magnet array of the undulator is installed inside the vacuum chamber to achieve shorter wavelength synchrotron radiation. A thin metal foil covers the magnet structure to mitigate resistive wall wakefields. Moveable tapered transitions connect the magnet structure and the adjacent vacuum duct to reduce the geometric wakefields. Nevertheless these moveable tapered transitions contribute significantly to the impedance budget of PETRA III. The computer codes MAFIA, CST-Studio and PBCI have been used to calculate the longitudinal and transverse wakefields. The results for the loss and kick parameters are presented and compared to the corresponding parameters for a standard undulator section.

Paper

Title

Page

Computation of Wakefields for an In-vacuum Undulator at PETRA III

1736

E. Gjonaj, L. Lünzer, T. Weiland
TEMF, TU Darmstadt, Darmstadt, Germany
R. Wanzenberg
DESY, Hamburg, Germany

Funding: Work supported by DESY, Hamburg, Germany
At DESY the installation of an in-vacuum undulator at the synchrotron radiation facility PETRA III is under consideration. The moveable magnet array of the undulator is installed inside the vacuum chamber to achieve shorter wavelength synchrotron radiation. A thin metal foil covers the magnet structure to mitigate resistive wall wakefields. Moveable tapered transitions connect the magnet structure and the adjacent vacuum duct to reduce the geometric wakefields. Nevertheless these moveable tapered transitions contribute significantly to the impedance budget of PETRA III. The computer codes MAFIA, CST-Studio and PBCI have been used to calculate the longitudinal and transverse wakefields. The results for the loss and kick parameters are presented and compared to the corresponding parameters for a standard undulator section.