• J.-M. Filhol, J.C. Besson, P. Brunelle, M.-E. Couprie, J.-C. Denard, C. Herbeaux, J.-F. Lamarre, P. Lebasque, M.-P. Level, P. Marchand, A. Nadji, R. Nagaoka
  SOLEIL, Gif-sur-Yvette

The SOLEIL syn­chrotron light source is now de­liv­er­ing pho­tons to 20 beam­lines with a cur­rent of 400 mA in top-up mode. The long and short term H and V beam po­si­tion sta­bil­i­ties are in the range of one mi­cron thanks to the ef­fi­cient slow and fast orbit feed­backs, and to the im­proved tun­nel tem­per­a­ture reg­u­la­tion. The bunch by bunch trans­verse feed­back is run­ning with two in­de­pen­dent H and V loops. To en­able cant­ed un­du­la­tor im­ple­men­ta­tions, a 3 mag­net chi­cane has been in­stalled in a medi­um straight where­as an ad­di­tion­al triplet of quadrupole was in­sert­ed in the mid­dle of a long straight to cre­ate a dou­ble low ver­ti­cal beta. 17 in­ser­tion de­vices are now in­stalled in the stor­age ring, 2 will be added early 2010, 8 are under con­struc­tion, in­clud­ing a cryo­genic un­du­la­tor. Fol­low­ing the sig­nif­i­cant pro­gres­sion of the vac­u­um con­di­tion­ing, the life­time is now main­ly Touchek lim­it­ed. An elec­tron bunch slic­ing set-up is also being in­stalled to pro­vide 100 fs long X-rays puls­es to two ex­ist­ing beam­lines. ~4500 hours will have been de­liv­ered in 2009 to the Beam­lines with an avail­abil­i­ty above 96 % thanks to the very re­li­able op­er­a­tion of the unique SOLEIL RF sys­tem.

• A. Loulergue, C. Benabderrahmane, F. Bouvet, P. Brunelle, M.-E. Couprie, J.-C. Denard, J.-M. Filhol, C. Herbeaux, P. Lebasque, V. Leroux, A. Lestrade, O. Marcouillé, J.L. Marlats, F. Marteau, T. Moreno, A. Nadji, L.S. Nadolski, F. Polack, A. Somogyi, M.-A. Tordeux
  SOLEIL, Gif-sur-Yvette

SOLEIL is the French 2.75 GeV high bril­liance third gen­er­a­tion syn­chrotron light source de­liv­er­ing pho­tons to 20 beam­lines with a cur­rent of 400 mA in multi­bunch or hy­brid modes, and 60 mA in 8 bunch mode. There are al­ready 17 in­ser­tion de­vices in­stalled and 9 oth­ers are planned in the next 2 com­ing years. Among them, two cant­ed in vac­u­um in­ser­tion de­vices are planned, for the Nanoscopi­um and To­mog­ra­phy beam­lines, and will be ac­com­mo­dat­ed in a 12 m long straight sec­tion, with a 6.5 mrad sep­a­ra­tion angle. These ~150 m long beam­lines will ex­ploit the high bril­liance and co­her­ence char­ac­ter­is­tics of the X-ray (5-20 keV) beam both for diffrac­tion lim­it­ed fo­cus­ing and for con­trast for­ma­tion. To pro­vide low ver­ti­cal beta func­tions at each un­du­la­tor, an extra triplet of quadrupoles was added in the mid­dle of the sec­tion. We pre­sent here the lat­tice im­ple­men­ta­tion foot­print, the dif­fer­ent work­ing point under in­ves­ti­ga­tions as well as the first re­sults of the mea­sure­ments on the ma­chine per­for­mances.

• A. Nadji, F. Briquez, M.-E. Couprie, J.-C. Denard, J.-M. Filhol, C. Herbeaux, Ph. Hollander, M. Labat, J.-F. Lamarre, C. Laulhe, V. Leroux, O. Marcouillé, J.L. Marlats, T. Moreno, P. Morin, P. Prigent, S. Ravy, F. Sirotti
  SOLEIL, Gif-sur-Yvette
• J. Luning
  UPMC, Paris
• M. Meyer
  LIXAM, Orsay

An elec­tron bunch slic­ing set-up is being in­stalled on the SOLEIL stor­age ring, based on Zho­lents and Zolo­torev method [1]. This will pro­vide 100 fs long X-ray puls­es with rea­son­able flux to two ex­ist­ing beam­lines, work­ing with soft X-rays (TEMPO) and hard X-rays (CRISTAL). The pa­ram­e­ters of the laser sys­tem and of the wig­gler mod­u­la­tor, and the op­ti­mi­sa­tion of the laser fo­cus­ing op­tics and beam path, from the laser hutch in the ex­per­i­men­tal hall to the in­side of the stor­age ring tun­nel have been fi­nalised. The con­struc­tion work will start early 2010, in­clud­ing the or­der­ing of the laser, the con­struc­tion of the laser hutch, the con­struc­tion of the wig­gler, the in­stal­la­tion of a new mod­i­fied vac­u­um dipole cham­ber by which the laser will enter into the ring, and the mod­i­fi­ca­tions of some com­po­nents in the beam­lines front-ends to pro­vide the best pos­si­ble sep­a­ra­tion of the sliced X-Ray. In this paper, we will re­port on the sta­tus of the in­stal­la­tion of the set-up and the ex­pect­ed per­for­mances in­clud­ing laser-elec­tron in­ter­ac­tion ef­fi­cien­cy, halo back­ground ef­fect and the pos­si­ble op­er­a­tion fill­ing pat­terns.

• C. Benabderrahmane, P. Berteaud, N. Béchu, M.-E. Couprie, J.-M. Filhol, C. Herbeaux, C.A. Kitegi, J.L. Marlats, K. Tavakoli, M. Valléau, D. Zerbib
  SOLEIL, Gif-sur-Yvette

The pro­duc­tion of hard X rays at SOLEIL, a 2.75 GeV, re­quires short pe­ri­od and small gap in-vac­u­um un­du­la­tors. For shift­ing fur­ther the ra­di­a­tion to­ward high­er en­er­gies, the peak mag­net­ic field of the un­du­la­tors can be fur­ther in­creased by cool­ing the per­ma­nent mag­nets at cryo­genic tem­per­a­ture below 100 K. A R&D pro­gramme for the con­struc­tion of a 2 m long 18 mm pe­ri­od CPMU is launched: the use of PrFeB en­ables to in­crease the peak mag­net­ic field at a cryo­genic tem­per­a­ture of 77 K. Praseodymi­um was cho­sen in­stead of Neodymi­um type mag­nets, be­cause it pre­vents the ap­pear­ance of the Spin Re­ori­en­ta­tion Tran­si­tion. The mag­net­ic char­ac­ter­i­sa­tion of dif­fer­ent per­ma­nent mag­net grades at cryo­genic tem­per­a­tures (NdFeB and PrFeB), and the mag­net­ic and ther­mal mea­sure­ments on a small 4 pe­ri­od NdFeB cryo­genic un­du­la­tor are pre­sent­ed. The sta­tus on the progress of the CPMU con­cep­tion is given. The mag­net­ic and me­chan­i­cal de­sign, in­clud­ing the cool­ing of the gird­ers at 77K, and the ther­mal bud­get are de­scribed. The de­signs of the ded­i­cat­ed mag­net­ic mea­sure­ment bench­es, which will be re­quired to check the mag­net­ic per­for­mance of the un­du­la­tor at low tem­per­a­ture, are also re­port­ed.

• O. Marcouillé, P. Berteaud, P. Brunelle, N. Béchu, L. Chapuis, M.-E. Couprie, J.-M. Filhol, C. Herbeaux, A. Lestrade, J.L. Marlats, A. Mary, M. Massal, M.-H. Nguyen, K. Tavakoli, M. Valléau, J. Vétéran
  SOLEIL, Gif-sur-Yvette

The pro­duc­tion of high flux­es in the hard X-rays re­gion is a major issue on medi­um en­er­gy stor­age rings. It re­quires the in­stal­la­tion of In­ser­tion De­vices with high mag­net­ic field and a large num­ber of pe­ri­ods. The con­struc­tion of a su­per­con­duct­ing wig­gler has been first en­vis­aged but re­veals to be main­te­nance con­strain­ing, much more com­plex and ex­pen­sive than the per­ma­nent mag­net tech­nol­o­gy. A small gap in vac­u­um wig­gler com­posed of 38 pe­ri­ods of 50 mm has been pre­ferred. The com­pact mag­net­ic sys­tem al­lows to pro­duce in a lim­it­ed space a mag­net­ic field of 2.1 T in a small gap of 5.5 mm, where­as an aux­il­iary coun­ter­force sys­tem based on non-mag­net­ic springs com­pen­sate the mag­net­ic forces (up to 8.5 Tons) act­ing be­tween mag­net ar­rays. The gap be­tween jaws and the me­chan­i­cal de­for­ma­tions have been con­trolled and cor­rect­ed. Magic fin­gers cor­rec­tions have been also per­formed to re­duce the in­te­grat­ed mul­ti­poles and to min­i­mize the 2nd order in­te­grals re­sult­ing from the tight width of the wig­gler poles. This paper pre­sents the de­sign of the wig­gler, the con­struc­tion, and the re­sults of the mea­sure­ments after mag­net­ic cor­rec­tions.