FEL2012 - List of Authors (Zambelli, M.)

Paper	Title	Page
THPD24	Origin of Shift Dependent Multipoles in Apple-II Undulators	587
	M. Kokole KYTE, Sezana, Slovenia B. Diviacco Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy T. Milharčič, M. Zambelli KYMA, Trieste, Italy G. Soregaroli, M. Tedeschi Euromisure srl, Pieve S. Giacomo (Cremona), Italy
	APPLE-II insertion devices are very flexible devices for production of variably polarized photons. This devices inherently suffer from shift dependent integrated field multipoles that can reach values which can seriously deteriorate quality of the electron beam. Since there is no really effective shimming method for correction of this errors, it is important to understand where they originate. Paper presents a study of integrated field multipoles shift dependency based on deformation of magnetic array due to magnetic forces. We have modeled separately deformations of each magnet keeper in the magnetic array. Model calculations have shown that most of integrated field multipole dependency on the shift is due to mechanical deformation in combination with magnetic effects.

Paper

Title

Page

Origin of Shift Dependent Multipoles in Apple-II Undulators

587

M. Kokole
KYTE, Sezana, Slovenia
B. Diviacco
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
T. Milharčič, M. Zambelli
KYMA, Trieste, Italy
G. Soregaroli, M. Tedeschi
Euromisure srl, Pieve S. Giacomo (Cremona), Italy

APPLE-II insertion devices are very flexible devices for production of variably polarized photons. This devices inherently suffer from shift dependent integrated field multipoles that can reach values which can seriously deteriorate quality of the electron beam. Since there is no really effective shimming method for correction of this errors, it is important to understand where they originate. Paper presents a study of integrated field multipoles shift dependency based on deformation of magnetic array due to magnetic forces. We have modeled separately deformations of each magnet keeper in the magnetic array. Model calculations have shown that most of integrated field multipole dependency on the shift is due to mechanical deformation in combination with magnetic effects.