Author: Uesugi, T.
Paper Title Page
MOPC158 RF Capture of a Beam with Charge-exchanging Multi-turn Injection 454
 
  • T. Uesugi, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, T. Planche, B. Qin, E. Yamakawa
    KURRI, Osaka, Japan
  • Y. Niwa, K. Okabe, I. Sakai
    University of Fukui, Faculty of Engineering, Fukui, Japan
  
  Funding: This work was supported by MEXT of Japan in the framework of a task entitled ”Research and Development for an Accelerator-Driven Sub-critical System Using an FFAG Accelerator”.
In the fixed field al­ter­nat­ing gra­di­ent (FFAG) syn­chrotron in Kyoto uni­ver­si­ty re­search re­ac­tor In­sti­tute (KURRI), charge ex­change in­jec­tion was adopt­ed since 2011. The charge strip­ping foil is lo­cat­ed on the closed orbit of the in­jec­tion en­er­gy, and no bump orbit sys­tem is used. In­stead, the in­ject­ed beam es­capes from the strip­ping foil ac­cord­ing to the closed-or­bit shift due to ac­cel­er­a­tion. In this scheme, it is im­por­tant to min­i­mize the num­ber of foil hit­ting, which caus­es emit­tance growth and foil heat­ing. In this paper, the rf cap­ture is stud­ied by means of sim­u­la­tion. 		 
 
WEPS074 H− Injection Studies of FFAG Accelerator at KURRI 2676
 
  • K. Okabe, Y. Niwa, I. Sakai
    University of Fukui, Faculty of Engineering, Fukui, Japan
  • Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, B. Qin, T. Uesugi, E. Yamakawa
    KURRI, Osaka, Japan
  
  Aim­ing to demon­strate the basic fea­si­bil­i­ty of the ac­cel­er­a­tor driv­en sub-crit­i­cal re­ac­tor (ADSR), pro­ton Fixed Field Al­ter­nat­ing Gra­di­ent (FFAG) ac­cel­er­a­tor com­plex as a neu­tron pro­duc­tion driv­er has been con­struct­ed in Kyoto Uni­ver­si­ty Re­search Re­ac­tor In­sti­tute (KURRI). In order to up­grade beam power of the FFAG neu­tron source, a pro­ject about a new H− linac in­jec­tor for FFAG main ring in­stead of pre­sent in­jec­tor has been start­ed. A charge ex­change mul­ti-turn beam in­jec­tion has been per­formed for the first time at FFAG main ring in KURRI. In this paper, the de­tail of in­jec­tion sys­tem and beam study of low en­er­gy H− in­jec­tion at FFAG is de­scribed.  
 
WEPS076 Straight Scaling FFAG 2682
 
  • J.-B. Lagrange, Y. Ishi, Y. Kuriyama, Y. Mori, T. Planche, B. Qin, T. Uesugi, E. Yamakawa
    KURRI, Osaka, Japan
  • K. Okabe
    University of Fukui, Faculty of Engineering, Fukui, Japan
  • A. Sardet, R. Wasef
    LPSC, Grenoble Cedex, France
  
  Re­cent de­vel­op­ments in scal­ing fixed field al­ter­nat­ing gra­di­ent (FFAG) ac­cel­er­a­tors have opened new ways for lat­tice de­sign, with straight sec­tions, and in­ser­tions like dis­per­sion sup­pres­sors. An ex­per­i­ment to study straight sec­tions and dis­per­sion sup­pres­sors is under progress at KURRI.  
 
WEPS077 Present Status of FFAG Proton Accelerator at KURRI* 2685
 
  • Y. Mori, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, R. Nakano, T. Planche, T. Uesugi, E. Yamakawa
    KURRI, Osaka, Japan
  • Y. Niwa, K. Okabe, I. Sakai
    University of Fukui, Faculty of Engineering, Fukui, Japan
  
  The 150MeV FFAG pro­ton ac­cel­er­a­tor has been de­vel­oped at Kyoto Uni­ver­si­ty Re­search Re­ac­tor In­sti­tute(KURRI) for the fun­da­men­tal study of Ac­cel­er­a­tor Driv­en Sub-crit­ti­cal Re­ac­tor (ADSR). Re­cent­ly, a new H− in­jec­tor was con­struct­ed to im­prove the beam qual­i­ty and in­ten­si­ty. The paper will de­scribe the de­tail of the pre­set sta­tus of FFAG pro­ton ac­cel­er­a­tor at KURRI.  
 
WEPS078 Compact FFAG Accelerators for Medium Energy Hadron Applications 2688
 
  • B. Qin, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, K. Okabe, T. Uesugi, E. Yamakawa
    KURRI, Osaka, Japan
  
  Funding: This work was supported by Japan Science and Technology Agency under Strategic Promotion of Innovative Research and Development Program.
Medi­um en­er­gy hadron beams are wide­ly ap­plied in ac­cel­er­a­tor driv­en sub­crit­i­cal sys­tems (ADSR), high in­ten­si­ty neu­tron sources and car­bon ther­a­py. Com­pact­ness fea­ture is im­por­tant for this en­er­gy re­gion, es­pe­cial­ly in the case of med­i­cal use pur­pos­es. This paper in­tro­duces a novel su­per­fer­ric scheme with scal­ing fixed-field al­ter­nat­ing gra­di­ent (FFAG) ac­cel­er­a­tors, which can de­liv­er 400MeV/u car­bon ions or 1.2GeV pro­tons. By using high per­me­abil­i­ty ma­te­ri­als, 5T mag­net­ic field with high field index can be achieved to re­duce ac­cel­er­a­tor cir­cum­fer­ence sig­nif­i­cant­ly. The lat­tice con­fig­u­ra­tion and de­sign of su­per­fer­ric mag­net are de­scribed in de­tails. 		 
 
WEPS079 Serpentine Acceleration in Scaling FFAG 2691
 
  • E. Yamakawa, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, R. Nakano, T. Planche, B. Qin, T. Uesugi
    KURRI, Osaka, Japan
  • K. Okabe, I. Sakai
    University of Fukui, Faculty of Engineering, Fukui, Japan
  
  A ser­pen­tine ac­cel­er­a­tion in scal­ing FFAG ac­cel­er­a­tor has been ex­am­ined. In this scheme, high-en­er­gy and high-cur­rent beam can be ob­tained in non-rel­a­tivis­tic en­er­gy re­gion. Lon­gi­tu­di­nal hamil­to­ni­an is also de­rived an­a­lyt­i­cal­ly.