Author: Topp-Mugglestone, M.E.
Paper Title Page
THPAB124 Application of the FFA Concept to a Muon Collider Complex 4006
 
  • S. Machida, J.-B. Lagrange
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  • M.E. Topp-Mugglestone
    JAI, Oxford, United Kingdom
  
  Muon col­lider com­plex is one of the places where the con­cept of fixed field al­ter­nat­ing gra­di­ent (FFA) op­tics can be ap­plied with great ben­e­fits. Ver­ti­cal ex­cur­sion FFA (vFFA) pro­vides the isochro­nous con­di­tion for the ul­tra-rel­a­tivis­tic muon beams after pre-ac­cel­er­a­tion. To­gether with the fixed trans­verse tune, it will be an ideal ac­cel­er­a­tor of short-lived muon beams with no time vari­a­tion of mag­netic fields and RF fre­quency. Novel col­lider ring op­tics is a de­sign based on skew quadru­pole after ex­tract­ing es­sen­tial func­tions from vFFA. That en­ables con­trol of the mo­men­tum com­paction fac­tor. Neu­tri­nos from the con­tin­u­ing decay of muons are spread out with orbit wig­gling in the ver­ti­cal di­rec­tion as well as hor­i­zon­tal. The paper dis­cusses the un­der­line prin­ci­ple and de­scribes some de­sign ex­am­ples.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB124  
About • paper received ※ 19 May 2021       paper accepted ※ 02 August 2021       issue date ※ 28 August 2021  
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THPAB236 First Order Analytic Approaches to Modelling the Vertical Excursion Fixed Field Alternating Gradient Accelerator 4262
 
  • M.E. Topp-Mugglestone, S.L. Sheehy
    JAI, Oxford, United Kingdom
  • J.-B. Lagrange, S. Machida
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  
  Whilst the Ver­ti­cal Ex­cur­sion Fixed Field Al­ter­nat­ing Gra­di­ent Ac­cel­er­a­tor (VFFA) re­mains a promis­ing so­lu­tion to a num­ber of prob­lems at the fron­tiers of ac­cel­er­a­tor physics, the op­tics of this type of ma­chine are still poorly un­der­stood. Cur­rent de­sign­ers are forced to rely on brute-force nu­mer­i­cal track­ing codes, with op­ti­mi­sa­tion de­pen­dent on time-con­sum­ing pa­ra­me­ter scans. With an aim to both im­prove un­der­stand­ing of this ma­chine, as well as to de­velop tools for rapid de­sign and op­ti­mi­sa­tion of VFFA lat­tices, first steps to­wards an an­a­lytic ap­proach based on a lin­earised Hamil­ton­ian for­mal­ism have been de­vel­oped.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB236  
About • paper received ※ 13 May 2021       paper accepted ※ 14 July 2021       issue date ※ 10 August 2021  
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