Author: Christou, C.
Paper Title Page
MOPAB071 Progress with the Booster Design for the Diamond-II Upgrade 286
 
  • I.P.S. Martin, C. Christou, M.P. Cox, R.T. Fielder, J. Kallestrup, A. Shahveh, W. Tizzano
    DLS, Oxfordshire, United Kingdom
  • A.D. Brynes, J.K. Jones, B.D. Muratori, H.L. Owen
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  
  Ef­fi­cient in­jec­tion into the Di­a­mond-II stor­age ring [*, **] will re­quire an emit­tance and bunch length sub­stan­tially below the val­ues pro­duced from the ex­ist­ing booster. Whilst an ear­lier de­sign for a re­place­ment based on TME cells was able to meet the tar­get val­ues of <30 nm.​rad and <40 ps re­spec­tively [***, ****], sev­eral tech­ni­cal con­straints have led to a re­think of this so­lu­tion. The re­vised booster lat­tice utilises a larger num­ber of cells based on com­bined-func­tion mag­nets with lower peak fields that still meets the emit­tance and bunch length goals. In ad­di­tion, the new ring has been de­signed to have low im­ped­ance to max­imise the ex­tracted charge per shot. In this paper we de­scribe the main fea­tures of the lat­tice, pre­sent the sta­tus of the en­gi­neer­ing de­sign and quan­tify the ex­pected per­for­mance.
*Diamond-II Conceptual Design Report, Diamond Light Source
**H. Ghasem et al, these proceedings
***I. Martin, R. Bartolini, J.Phys.:Conf. Ser., 1067, 032005
****I. Martin et al, IPAC 2019, WEPMP042 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB071  
About • paper received ※ 18 May 2021       paper accepted ※ 31 May 2021       issue date ※ 02 September 2021  
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MOPAB107 RF Plans for the Diamond-II Upgrade 391
 
  • C. Christou, P. Gu, P.J. Marten, S.A. Pande, A.F. Rankin
    DLS, Oxfordshire, United Kingdom
  
  The RF sys­tem for the pro­posed Di­a­mond-II up­grade will be based on nor­mal-con­duct­ing EU HOM-damped cav­i­ties pow­ered by high pow­ered solid state am­pli­fiers and con­trolled by dig­i­tal low level RF sys­tems built on the mi­croTCA plat­form. Rea­sons for these de­sign choices are dis­cussed, and ex­pe­ri­ence of the se­lected tech­nolo­gies in the Di­a­mond-I ring are re­viewed. The stor­age ring will also in­clude a third har­monic cav­ity, and the dif­fer­ent de­sign op­tions for this de­vice are dis­cussed. RF de­sign of the booster ring is pre­sented, and de­tails are given of an up­graded linac and gun de­sign in­tended to im­prove the charge de­liv­ered for top-up.  
poster icon Poster MOPAB107 [1.703 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB107  
About • paper received ※ 18 May 2021       paper accepted ※ 20 May 2021       issue date ※ 12 August 2021  
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