Author: Cassinari, L.
Paper Title Page
MOPEA006 Operation and Performance Upgrade of the SOLEIL Storage Ring 73
 
  • A. Nadji, F. Bouvet, P. Brunelle, A. Buteau, L. Cassinari, M.-E. Couprie, N. Hubert, M. Labat, J.-F. Lamarre, P. Lebasque, A. Lestrade, A. Loulergue, P. Marchand, J.L. Marlats, L.S. Nadolski, R. Nagaoka, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette, France
 
  SOLEIL de­liv­ers pho­tons to 26 beam­lines and 3 new ones are under con­struc­tion to­gether with the fem­toslic­ing pro­ject. Up to 5 fill­ing pat­terns are avail­able for the users in­clud­ing a low alpha mode; all of them are in Top-up in­jec­tion. The beam cur­rent for the users has been in­creased to 430 mA in the multi­bunch mode. The Stor­age Ring (SR) is run­ning with a new op­tics in­cor­po­rat­ing an ad­di­tional quadru­pole triplet in one long straight sec­tion. The beam po­si­tion sta­bil­ity re­mains ex­cel­lent. Ver­ti­cal po­si­tions from the di­pole X-BPMs have been in­cluded in the orbit feed­backs loop with very en­cour­ag­ing re­sults. A feed­back loop main­tain­ing the emit­tance cou­pling close to 1% for any In­ser­tion De­vices (IDs) con­fig­u­ra­tion has been im­ple­mented. Up to 25 very di­verse IDs are now in­stalled on the SR, and sev­eral oth­ers are under de­sign or con­struc­tion. In house de­vel­op­ments are being car­ried out in sev­eral do­mains such as con­struc­tion of SR di­pole power sup­ply spare and of 70 kW-500 MHz solid state am­pli­fiers, de­sign of a pulsed mul­ti­pole mag­net for in­jec­tion, and a Robin­son wig­gler, as well as a fea­si­bil­ity study of a local re­duc­tion of the emit­tance in one of the long straight sec­tions.  
 
WEPME001 SOLEIL Beam Stability Status 2917
 
  • N. Hubert, L. Cassinari, J.-C. Denard, M. Labat, J.-F. Lamarre, A. Nadji, L.S. Nadolski, D. Pédeau, M.-A. Tordeux
    SOLEIL, Gif-sur-Yvette, France
 
  This paper re­ports re­cent work for im­prov­ing SOLEIL elec­tron beam sta­bil­ity. X-BPMs from four bend­ing mag­net beam­line fron­tends have been in­serted in the global orbit feed­back loops dur­ing user op­er­a­tion. The cor­re­spond­ing source point sta­bil­i­ties have im­proved and re­sults are re­ported. Some of the new beam­lines re­quest more strin­gent sta­bil­ity than the ex­ist­ing ones. Their re­quire­ments are not only tighter for beam orbit but also for beam size and di­ver­gence sta­bil­ity. For these rea­sons, SOLEIL has de­cided to de­fine beam qual­ity cri­te­ria for each sen­si­tive beam­line. Then it can pre­dict ahead of com­mis­sion­ing how well the beam­line will likely per­form. A feed­back on the ver­ti­cal emit­tance, mea­sured by a pin­hole cam­era, has been in­tro­duced in order to re­duce beam size and di­ver­gence vari­a­tions due to mag­netic con­fig­u­ra­tion changes of a few in­ser­tion de­vices.