Author: Scheer, M.
Paper Title Page
MOPAB126 BESSY III & MLS II - Status of the Development of the New Photon Science Facility in Berlin 451
 
  • P. Goslawski, M. Abo-Bakr, F. Andreas, M. Arlandoo, J. Bengtsson, V. Dürr, K. Holldack, J.-G. Hwang, A. Jankowiak, B.C. Kuske, J. Li, A.N. Matveenko, T. Mertens, A. Meseck, E.C.M. Rial, M. Ries, M.K. Sauerborn, A. Schälicke, M. Scheer, P. Schnizer, L. Shi, J. Viefhaus
    HZB, Berlin, Germany
  • J. Lüning
    UPMC, Paris, France
  
  HZB op­er­ates and de­vel­ops two syn­chro­tron ra­di­a­tion sources at Berlin Adler­shof. The larger one, BESSY II with an en­ergy of 1.7 GeV and 240 m cir­cum­fer­ence is op­ti­mized for soft-X rays and in op­er­a­tion since 1999. The smaller one is the MLS (Metrol­ogy Light Source), owned by the Physikalis­che Tech­nis­che Bun­de­sanstalt (PTB) - Ger­many’s Na­tional Metrol­ogy In­sti­tute. It is de­signed to ful­fill the spe­cial metrol­ogy needs of the PTB with an en­ergy of 0.6 GeV and 48 m cir­cum­fer­ence, cov­er­ing the spec­tral range from THz and IR to EUV/VUV. In 2020 a dis­cus­sion process has been started to de­fine the re­quire­ments for suc­ces­sors of BESSY II and MLS and to study the pos­si­bil­i­ties in­te­grate them into a new pho­ton sci­ence fa­cil­ity in Berlin Adler­shof. Here, we give a sta­tus re­port and pre­sent a first en­vis­aged pa­ra­me­ter space to both ma­chines (see also MOPAB262, MOPAB220, MOPAB048, MOPAB242).  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB126  
About • paper received ※ 18 May 2021       paper accepted ※ 24 June 2021       issue date ※ 18 August 2021  
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TUPAB217 Effect of Undulators on Transverse Resonant Island Orbits 1927
 
  • E.C.M. Rial, J. Bahrdt, P. Goslawski, A. Meseck, M. Ries, M. Scheer
    HZB, Berlin, Germany
  
  For one week in Oc­to­ber 2020, BESSY II of­fered a Two Orbit mode to users for the first time*. In this Two Orbit mode, the ex­is­tence of trans­verse res­o­nant is­land buck­ets** are ex­ploited to store a sec­ond beam in the stor­age ring as an ’is­land orbit’, away from the pri­mary beam axis. This mode was of­fered with free range of mo­tion of the 12 out of vac­uum un­du­la­tors in­stalled at the BESSY II ring. Di­ag­nos­tics of the is­land orbit were lim­ited to a sin­gle cam­era mon­i­tor­ing bend­ing mag­net ra­di­a­tion from a sin­gle di­pole. A sig­nif­i­cant mo­tion of the is­land orbit was ob­served on this di­ag­nos­tic and cor­re­lated with un­du­la­tor mo­tion. This ob­ser­va­tion is re­ported, and sim­u­la­tions pre­sented to demon­strate how this mo­tion could arise. Cor­rec­tion schemes are sug­gested and dis­cussed.
*Two Orbit - a report on the first scheduled week of TRIBs user operation at BESSY II, M. Ries et al, these proceedings
**Proc. IPAC 2016, Busan, S Korea, paper THPMR017, p. 3427 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB217  
About • paper received ※ 19 May 2021       paper accepted ※ 21 June 2021       issue date ※ 22 August 2021  
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