Design, manufacturing and first measurements of a hybrid permanent magnet undulator for free electron laser

Author

Rosatelli, F. ; Barbagelata, L. ; Crenna, F. ; Grattarola, M. ; Gualco, G. ; Matrone, A. ; Ottonello, G.B. ; Ciocci, F. ; Renieri, A.

Author_Institution

Ansaldo Ricerche, Genova, Italy

fYear

1991

fDate

6-9 May 1991

Firstpage

2760

Abstract

The hybrid permanent magnet undulator for the LISA-FEL (free electron laser) experiment (INFN, Frascati, Italy) has been designed and manufactured. A computerized driving system has been developed in order to lighten the mechanical structure and gain accuracy in positioning of the jaws during gap variation. The NdFeB permanent magnet blocks have been measured and sorted in order to reduce magnetic field errors along the undulator axis. The field integrals are minimized by the electronic control, which feeds the correction coils with a gap-dependent current. The first results of mechanical tests and magnetic field measurements confirm the good performance and reliability of the device.<>

Keywords

electron accelerators; free electron lasers; permanent magnets; wigglers; LISA-FEL; NdFeB; computerized driving system; correction coils; free electron laser; hybrid permanent magnet undulator; magnetic field errors; mechanical tests; performance; reliability; Coils; Computer errors; Feeds; Free electron lasers; Magnetic field measurement; Manufacturing; Optical design; Permanent magnets; Testing; Undulators;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-0135-8

Type

conf

DOI

10.1109/PAC.1991.165094

Filename

165094