• S. Sanz, J. Calero, J.L. Gutiérrez, I. Moya, I. Podadera Aliseda, I. Rodríguez, L. Sanchez, F. Toral
  CIEMAT, Madrid
• P. Bosland, P. Bredy, G. Disset, N. Grouas, P. Hardy, V.M. Hennion, H. Jenhani, J. Migne, A. Mohamed, F. Orsini, J. Plouin, J. Relland
  CEA, Gif-sur-Yvette
• E.N. Zaplatin
  FZJ, Jülich

The IFMIF-EVE­DA ac­cel­er­a­tor will han­dle a 9 MeV, 125 mA con­tin­u­ous wave (CW) deuteron beam which aims to val­i­date the tech­nol­o­gy that will be used in the fu­ture IFMIF ac­cel­er­a­tor. The Linac de­sign is based on su­per­con­duct­ing Half Wave Res­onators (HWR) op­er­at­ing at 4.4 K. Due to space charge as­so­ci­at­ed to the high in­ten­si­ty beam, a strong su­per­con­duct­ing fo­cus­ing mag­net pack­age is nec­es­sary be­tween cav­i­ties, with nest­ed steer­ers and a Beam Po­si­tion Mon­i­tor (BPM). First of all, this paper de­scribes the pre­lim­i­nary study to choose be­tween two quadrupoles or one solenoid as fo­cus­ing de­vice, both using NbTi wire. The solenoid shows more ad­van­tages, main­ly as­so­ci­at­ed to avail­able space and re­li­a­bil­i­ty. Then, elec­tro­mag­net­ic and me­chan­i­cal de­sign of the solenoid and the steer­ers are re­port­ed. Spe­cial care is taken in order to ful­fil the fringe field limit at the cav­i­ty flange. An ac­tive shield con­fig­u­ra­tion using an an­ti-solenoid has been adopt­ed, avoid­ing rem­nant mag­ne­ti­za­tion as­so­ci­at­ed to pas­sive shield­ing ma­te­ri­als.

• N. Grouas, P. Bosland, P. Bredy, G. Disset, P. Hardy, V.M. Hennion, H. Jenhani, J. Migne, A. Mohamed, F. Orsini, J. Plouin, J. Relland
  CEA, Gif-sur-Yvette
• B. Branas Lasala, I. Podadera Aliseda, S. Sanz, F. Toral
  CIEMAT, Madrid
• E.N. Zaplatin
  FZJ, Jülich

The IFMIF pro­ject aims to build a high in­ten­si­ty ma­te­ri­al ir­ra­di­a­tion fa­cil­i­ty which one of the main com­po­nents is a high in­ten­si­ty deuteron ac­cel­er­a­tor. A pro­to­type of this ac­cel­er­a­tor will be built in Rokkasho in Japan. It in­cludes a cry­omod­ule com­posed of 8 su­per­con­duct­ing cav­i­ties (HWR) pow­ered by 200 kW cou­plers to ac­cel­er­ate the deuteron beam from 5 MeV to 9 MeV. The beam is fo­cused in­side the cry­omod­ule by 8 su­per­con­duct­ing solenoids. The cry­omod­ule de­sign has to re­spect some se­vere beam dy­nam­ics re­quire­ments, in par­tic­u­lar a re­strict­ed space for the com­po­nent in­ter­faces and an ac­cu­rate align­ment to be kept dur­ing cool­ing down. A dou­ble cryo­genic sys­tem has been de­signed as it is nec­es­sary to con­trol the cav­i­ty cool­ing in­de­pen­dent­ly from the solenoid one. The cry­omod­ule de­sign should also be com­pat­i­ble with its en­vi­ron­ment in the Rokkasho build­ing. This paper gives then a gen­er­al overview of the 1rst cry­omod­ule cur­rent de­sign and its in­ter­faces. It de­fines the con­cept cho­sen for the Cryo­genic Sys­tem, ex­plains the method fore­seen for the as­sem­bly and align­ment and de­scribes the in­te­gra­tion study in Rokkasho.

• H. Jenhani, P. Bosland, P. Bredy, M. Desmons, G. Devanz, G. Disset, N. Grouas, P. Hardy, V.M. Hennion, J. Migne, A. Mohamed, F. Orsini, J. Plouin, J. Relland
  CEA, Gif-sur-Yvette
• B. Branas Lasala, I. Podadera Aliseda, S. Sanz, F. Toral
  CIEMAT, Madrid
• F.M. Mirapeix, C. Palacios
  TTI, Santander
• E.N. Zaplatin
  FZJ, Jülich

The driv­er of the In­ter­na­tion­al Fu­sion Ma­te­ri­al Ir­ra­di­a­tion Fa­cil­i­ty (IFMIF) con­sists of two 125 mA, 40 MeV CW deuteron ac­cel­er­a­tors. A su­per­con­duct­ing op­tion for the 5 to 40 MeV linac based on Half-Wave Res­onators (HWR) has been cho­sen. The first cry­omod­ule hous­es 8 HWR's sup­plied by high power RF cou­plers; each of them should be able to op­er­ate at 200 kW in CW. This paper will give an overview of the RF de­sign of the 175 MHz CW power cou­pler. The de­tailled me­chan­i­cal stud­ies and the re­al­iza­tion will be per­formed by the In­dus­try. Glob­al ap­proach of the con­tract with the In­dus­try and the or­ga­ni­za­tion of the in­ter­me­di­ate val­i­da­tion tests will be dis­cussed. In a sec­ond part, the choic­es and the last ad­vances con­cern­ing the cou­plers RF power test stand will be de­scribed.

• F. Orsini, P. Bosland, P. Bredy, G. Disset, N. Grouas, P. Hardy, V.M. Hennion, H. Jenhani, J. Migne, A. Mohamed, J. Plouin, J. Relland
  CEA, Gif-sur-Yvette
• B. Branas Lasala, I. Podadera Aliseda, S. Sanz, F. Toral
  CIEMAT, Madrid
• E.N. Zaplatin
  FZJ, Jülich

In the frame­work of the In­ter­na­tion­al Fu­sion Ma­te­ri­als Ir­ra­di­a­tion Fa­cil­i­ty (IFMIF), which con­sists of two high power CW ac­cel­er­a­tor drivers, each de­liv­er­ing a 125 mA deuteron beam at 40 MeV, an ac­cel­er­a­tor pro­to­type is present­ly under de­sign for the first phase of the pro­ject. A su­per­con­duct­ing op­tion has been cho­sen for the 5 MeV RF Linac, based on a cry­omod­ule com­posed of 8 low-be­ta Half-Wave Res­onators (HWR), 8 Solenoid Pack­ages and 8 RF cou­plers. This paper will focus on the HWR sub-sys­tem: the RF, ther­mo-me­chan­i­cal de­sign, and the re­al­iza­tion of the first pro­to­type of HWR will be pre­sent­ed. The res­onator tun­ing fre­quen­cy is con­trolled by an in­no­vant Cold Tun­ing Sys­tem (CTS), lo­cat­ed in the cen­tral re­gion of the cav­i­ty. The dif­fer­ent op­tions for tun­ing will be dis­cussed and the final ther­mo-me­chan­i­cal de­sign will be de­tailed. First val­i­da­tion test re­sults of the CTS are ex­pect­ed for the con­fer­ence.