FEL2012 - List of Authors (Schmidt, T.)

Paper	Title	Page
THPD19	Technical Overview of SwissFEL Undulator Line	583
	R. Ganter, M. Aiba, H.-H. Braun, C. Calvi, A. Fuchs, P. Heimgartner, E. Hohmann, R. Ischebeck, H. Jöhri, B. Keil, N. Milas, M. Negrazus, S. Reiche, S. Sanfilippo, T. Schmidt, S. Sidorov, P. Wiegand PSI, Villigen PSI, Switzerland
	Starting after Linac 3 at z ~ 430 m (z = 0 being the gun photocathode position), the so-called Aramis Hard-X ray undulator section extends over 170 m, from the energy collimator to the electron beam dump. Electrons enter the undulator section with a maximum energy of 5.8 GeV, a slice emittance below 0.43 μm and a peak current of 3 kA with 200 pC of charge. A prototype of the in-vacuum undulator (U15) is currently under assembly. Most of the other beamline components have been designed and for some of them prototypes are already ordered (quadrupoles, beam position monitors, phase shifters, alignment quadrupoles; mechanical supports; safety components). The paper will describe how constraints like temperature drifts, stray magnetic field, wakefields, beam losses, costs are taken into account for the design of components and building (undulators are however described in details in a companion paper).

THPD63	SwissFEL U15 Magnet Assembly: First Experimental Results	662
	C. Calvi, M. Brügger, H. Jöhri, T. Schmidt PSI, Villigen PSI, Switzerland
	In the framework of the SwissFEL project, an R&D activity concerning in-vacuum undulator technology is ongoing at the Paul Scherrer Institut. The magnetic field configuration of the hard X-ray SwissFEL undulators has been designed on purpose for a single pass machine. Moreover the permanent magnet material (NdFeB) is manufactured following a novel procedure (Dy diffused in the grain boundaries) to improve the coercivity versus remanence. The assembly and tests of a 44 periods hybrid magnetic structure are presented. Procedures for the magnetic field, trajectory and phase optimization are reported versus experimental results.

THPD64	SwissFEL U15 Prototype Design and First Results	666
	T. Schmidt, M. Brügger, C. Calvi, H. Jöhri, A. Keller, T. Stapf PSI, Villigen PSI, Switzerland
	The SwissFEL will have in the base line two undulator lines for the hard- and soft x-ray: U15 in-vacuum and U40 / UE40 APPLE II type undulators with 12 and 15 modules of 4m length each. All undulators are equipped with the same frame and gap drive system to profit best from the series production. The frame is built up from two identical bases and two sides made of cast mineral. In this design, the frame transfers its stiffness to the I-beam through a backlash-free wedge based gap drive system. The interfaces to the inner I-beam for the in-vacuum undulator have been rearranged and reduced significantly. Magnets and poles are carried by an extruded Aluminum block-keeper, which allows an automated tuning of the magnet structure. The prototype of the support structure has been built up during spring 2012 and measuring results will be presented. The full prototype shall be ready for the end of 2012.

Paper

Title

Page

Technical Overview of SwissFEL Undulator Line

583

R. Ganter, M. Aiba, H.-H. Braun, C. Calvi, A. Fuchs, P. Heimgartner, E. Hohmann, R. Ischebeck, H. Jöhri, B. Keil, N. Milas, M. Negrazus, S. Reiche, S. Sanfilippo, T. Schmidt, S. Sidorov, P. Wiegand
PSI, Villigen PSI, Switzerland

Starting after Linac 3 at z ~ 430 m (z = 0 being the gun photocathode position), the so-called Aramis Hard-X ray undulator section extends over 170 m, from the energy collimator to the electron beam dump. Electrons enter the undulator section with a maximum energy of 5.8 GeV, a slice emittance below 0.43 μm and a peak current of 3 kA with 200 pC of charge. A prototype of the in-vacuum undulator (U15) is currently under assembly. Most of the other beamline components have been designed and for some of them prototypes are already ordered (quadrupoles, beam position monitors, phase shifters, alignment quadrupoles; mechanical supports; safety components). The paper will describe how constraints like temperature drifts, stray magnetic field, wakefields, beam losses, costs are taken into account for the design of components and building (undulators are however described in details in a companion paper).

THPD63

SwissFEL U15 Magnet Assembly: First Experimental Results

662

C. Calvi, M. Brügger, H. Jöhri, T. Schmidt
PSI, Villigen PSI, Switzerland

In the framework of the SwissFEL project, an R&D activity concerning in-vacuum undulator technology is ongoing at the Paul Scherrer Institut. The magnetic field configuration of the hard X-ray SwissFEL undulators has been designed on purpose for a single pass machine. Moreover the permanent magnet material (NdFeB) is manufactured following a novel procedure (Dy diffused in the grain boundaries) to improve the coercivity versus remanence. The assembly and tests of a 44 periods hybrid magnetic structure are presented. Procedures for the magnetic field, trajectory and phase optimization are reported versus experimental results.

THPD64

SwissFEL U15 Prototype Design and First Results

666

T. Schmidt, M. Brügger, C. Calvi, H. Jöhri, A. Keller, T. Stapf
PSI, Villigen PSI, Switzerland

The SwissFEL will have in the base line two undulator lines for the hard- and soft x-ray: U15 in-vacuum and U40 / UE40 APPLE II type undulators with 12 and 15 modules of 4m length each. All undulators are equipped with the same frame and gap drive system to profit best from the series production. The frame is built up from two identical bases and two sides made of cast mineral. In this design, the frame transfers its stiffness to the I-beam through a backlash-free wedge based gap drive system. The interfaces to the inner I-beam for the in-vacuum undulator have been rearranged and reduced significantly. Magnets and poles are carried by an extruded Aluminum block-keeper, which allows an automated tuning of the magnet structure. The prototype of the support structure has been built up during spring 2012 and measuring results will be presented. The full prototype shall be ready for the end of 2012.