Author: Warsop, C.M.
Paper Title Page
MOPFI063 Progress on Designs for 180 MeV Injection into the ISIS Synchrotron 428
 
  • B. Jones, D.J. Adams, B.S. Drumm, M.C. Hughes, A.J. McFarland, C.M. Warsop
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  
  The ISIS Fa­cil­ity at the Ruther­ford Ap­ple­ton Lab­o­ra­tory in the UK pro­duces in­tense neu­tron and muon beams for con­densed mat­ter re­search. It op­er­ates at 50Hz ac­cel­er­at­ing beam via a 70 MeV H− linac and an 800 MeV pro­ton syn­chro­tron, de­liv­er­ing a mean beam power of 0.2 MW. As an ini­tial step to­wards megawatt op­er­a­tions at ISIS, a study of re­place­ment of the ex­ist­ing in­jec­tor with a new 180 MeV H− linac has re­cently been com­pleted. This could en­able an in­crease in beam power to ap­prox­i­mately 0.5 MW. The ISIS Fa­cil­ity at the Ruther­ford Ap­ple­ton Lab­o­ra­tory in the UK pro­duces in­tense neu­tron and muon beams for con­densed mat­ter re­search. It ac­cel­er­ates 3×1013 pro­tons per pulse (ppp) at 50 Hz through a 70 MeV H− linac and an 800 MeV pro­ton syn­chro­tron, de­liv­er­ing a mean beam power of ~0.2 MW. A favoured first step to up­grade ISIS to­wards the megawatt regime is re­place­ment of the linac with a new 180 MeV in­jec­tor de­scribed in [1]. Stud­ies of this up­grade, which aims to in­crease mean beam power up to 0.5 MW are out­lined in [2]. This paper re­ports on re­cent de­vel­op­ment of the de­signs in­clud­ing the in­jec­tion sep­tum, di­pole power sup­plies and de­tailed track­ing of par­tially stripped foil prod­ucts.  
 
WEPEA073 A 180 MeV Injection Upgrade Design for the ISIS Synchrotron 2678
 
  • J.W.G. Thomason, D.J. Adams, B.S. Drumm, D.J.S. Findlay, I.S.K. Gardner, M.C. Hughes, S.J.S. Jago, B. Jones, R.J. Mathieson, S.J. Payne, B.G. Pine, A. Seville, H. V. Smith, C.M. Warsop, R.E. Williamson
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  • J. Pasternak
    STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
  • D.C. Plostinar, C.R. Prior, G.H. Rees
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  
  ISIS is the spal­la­tion neu­tron source at the Ruther­ford Ap­ple­ton Lab­o­ra­tory in the UK. Ob­so­les­cence and re­li­a­bil­ity is­sues are mo­ti­vat­ing plans to re­place the pre­sent 70 MeV H minus linac, and this paper pre­sents an overview of a de­sign to allow in­jec­tion of beam into the pre­sent ISIS ring at 180 MeV, which would in­crease in­ten­sity as a re­sult of re­duced space charge and op­ti­mised in­jec­tion. The key top­ics ad­dressed are de­sign of the in­jec­tion straight, in­jec­tion paint­ing and dy­nam­ics, foil spec­i­fi­ca­tions, ac­cel­er­a­tion dy­nam­ics, trans­verse space charge, in­sta­bil­i­ties, RF beam load­ing and ac­ti­va­tion.