Title :
Commissioning of OPHeLIE: the new electromagnetic crossed overlapped undulator at Super-ACO
Author :
Corlier, M. ; Besson, J.-C. ; Brunelle, P. ; Claverie, J. ; Godefroy, J.-M. ; Herbeaux, C. ; Lefebvre, Dimitri ; Marcouillé, O. ; Marlats, J.-L. ; Marteau, F. ; Michaut, J. ; Peaupardin, P. ; Petit, A. ; Sommer, M. ; Vétéran, J. ; Nahon, L.
Author_Institution :
Lab. pour l´´Utilisation du Rayonnement Electromagn., Univ. de Paris-Sud, Orsay, France
Abstract :
OPHeLIE, the first electromagnetic Onuki-type undulator has been installed on the 0.8 GeV storage ring Super-ACO in February 1998. It consists in two identical 9-period crossed overlapped undulators whose magnetic fields (up to 0.12 T) are produced by conventional electromagnets. This insertion device is able to produce any kind of polarization in the VUV range with a potential polarization switching rate of 1 Hz. Measurements of focusing and closed orbit distortion show a very good agreement with magnetic measurements. A compensation scheme has been developed in order to make the operation of the insertion device as user-friendly as possible. First results obtained on photon beam are very promising. Photon energy calibration, flux optimization and polarization measurements are in progress
Keywords :
calibration; electromagnets; electron accelerators; storage rings; wigglers; 0.8 GeV; OPHeLIE; Super-ACO; closed orbit distortion; electromagnetic crossed overlapped undulator; flux optimization; magnetic measurements; nine-period crossed overlapped undulators; photon energy calibration; polarization measurements; potential polarization switching rate; storage ring; Distortion measurement; Electromagnetic measurements; Electromagnetic wave polarization; Electromagnets; Extraterrestrial measurements; Magnetic field measurement; Magnetic switching; Magnetic variables measurement; Storage rings; Undulators;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792904
