Author: Dowd, R.T.
Paper Title Page
TUZZPLS2 Beam Dynamics, Injection and Impedance Studies for the Proposed Single Pulsed Nonlinear Injection Kicker at the Australian Synchrotron 1219
  • R. Auchettl, R.T. Dowd, Y.E. Tan
    AS - ANSTO, Clayton, Australia
  The Australian Synchrotron are currently investigating the use of a single pulsed nonlinear injection kicker (NLK) to free floor space within the ring for future beamline development. The NLK has a zero and flat magnetic field at the stored beam to leave the stored beam undisturbed but has a maximum field off-axis where the injected beam is located. After the kick, the injected beam is stored. While NLKs have been prototyped at many facilities around the world, injection efficiency and heat loading have been the main impediment to deployment of the NLK. The wakefields that pass through the ceramic chamber aperture can cause severe heat loading and impedance. Despite achieving impressive injection efficiencies, a previous prototype at BESSY II * showed that strong interactions of the stored beam resulted in high heat load causing the thin 5µm Titanium coated ceramic chamber to reach temperatures > 500 °C and fail. To avoid beam induced heat loads, this paper presents studies of the wake impedance and thermal behaviour for our proposed NLK design. Injection simulations and future considerations for installation and operation at the Australian Synchrotron will be discussed.
* T. Atkinson et al., "Development of a non-linear kicker system to facilitate a new injection scheme for the Bessy II storage ring", in Proc. IPAC’11, 2011, THPO024, pp. 3394-3396.
slides icon Slides TUZZPLS2 [1.588 MB]  
DOI • reference for this paper ※  
About • paper received ※ 15 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
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TUPRB032 The CompactLight Design Study Project 1756
  • G. D’Auria, S. Di Mitri, R.A. Rochow
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • M. Aicheler
    HIP, University of Helsinki, Finland
  • A.A. Aksoy
    Ankara University, Accelerator Technologies Institute, Golbasi, Turkey
  • D. Alesini, M. Bellaveglia, B. Buonomo, F. Cardelli, M. Croia, M. Diomede, M. Ferrario, A. Gallo, A. Giribono, L. Piersanti, B. Spataro, C. Vaccarezza
    INFN/LNF, Frascati, Italy
  • R. Apsimon, A. Castilla
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • J.M. Arnesano, F. Bosco, L. Ficcadenti, A. Mostacci, L. Palumbo
    Sapienza University of Rome, Rome, Italy
  • A. Bernhard, J. Gethmann
    KIT, Karlsruhe, Germany
  • G. Burt
    Lancaster University, Lancaster, United Kingdom
  • M. Calvi, T. Schmidt, K. Zhang
    PSI, Villigen PSI, Switzerland
  • H.M. Castaneda Cortes, J.A. Clarke, D.J. Dunning, N. Thompson
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • A.W. Cross, L. Zhang
    USTRAT/SUPA, Glasgow, United Kingdom
  • G. Dattoli, F. Nguyen, A. Petralia
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • R.T. Dowd, D. Zhu
    AS - ANSTO, Clayton, Australia
  • W.D. Fang
    SINAP, Shanghai, People’s Republic of China
  • A. Faus-Golfe, Y. Han
    LAL, Orsay, France
  • E.N. Gazis, N. Gazis
    National Technical University of Athens, Zografou, Greece
  • R. Geometrante, M. Kokole
    KYMA, Trieste, Italy
  • V.A. Goryashko, M. Jacewicz, R.J.M.Y. Ruber
    Uppsala University, Uppsala, Sweden
  • X.J.A. Janssen, J.M.A. Priem
    VDL ETG, Eindhoven, The Netherlands
  • A. Latina, X. Liu, C. Rossi, D. Schulte, S. Stapnes, X.W. Wu, W. Wuensch
    CERN, Geneva, Switzerland
  • O.J. Luiten, P.H.A. Mutsaers, X.F.D. Stragier
    TUE, Eindhoven, The Netherlands
  • J. Marcos, E. Marín, R. Muñoz Horta, F. Pérez
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • G. Taylor
    The University of Melbourne, Melbourne, Victoria, Australia
  Funding: This project has received funding from the European Union’s Horizon2020 research and innovation programme under grant agreement No 777431
The H2020 CompactLight Project (www. aims at designing the next generation of compact X-rays Free-Electron Lasers, relying on very high gradient accelerating structures (X-band, 12 GHz), the most advanced concepts for bright electron photo injectors, and innovative compact short-period undulators. Compared to existing facilities, the proposed facility will benefit from a lower electron beam energy, due to the enhanced undulators performance, and will be significantly more compact, with a smaller footprint,  as a consequence of the lower energy and the high-gradient X-band structures. In addition, the whole infrastructure will also have a lower electrical power demand as well as lower construction and running costs.
DOI • reference for this paper ※  
About • paper received ※ 15 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
Public Awareness Activity  
  • M.C. Chalmers, R.T. Dowd
    AS - ANSTO, Clayton, Australia
  Instructions on how to participate in the Wiki Edit-a-thon activity.  
slides icon Slides WESPLS3 [0.738 MB]  
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THPRB001 Applications of Online Optimization Algorithms for Injection at the Australian Synchrotron 3795
  • R. Auchettl, R.T. Dowd
    AS - ANSTO, Clayton, Australia
  At the Australian Synchrotron, accelerator tuning predominantly occurs via manual optimization or traditional optimization techniques such as the Linear Optics from Closed Orbits (LOCO) algorithm. While we have had distinct success with the implementation of LOCO* and manual tuning, these strategies are not without their downsides. Some situations (such as the optimization of synchrotron beam dynamics) produce a design space too large and multifaceted for manual tuning while implementing LOCO can be computationally expensive. Also, without sufficient diagnostic systems, both LOCO and manual tuning do not necessarily guarantee that the optimal solution will be found. Motivated by the successful implementation of online optimization algorithms at SPEAR3**, this paper outlines the application of online optimization algorithms to improve the performance of the Australian Synchrotron injection system. We apply the efficient Robust Conjugate Direction Search (RCDS) Algorithm to reduce beam loss along the Booster-to-Storage ring (BTS) Transfer line and Storage Ring and compare against the LOCO method.
* R. Dowd et al. (2011), Phys. Rev. ST: AB, 14, 012804.
** X. Huang et al. (2013), Nucl. Instr. Meth. A., vol. 726, pp. 77-83.
DOI • reference for this paper ※  
About • paper received ※ 08 April 2019       paper accepted ※ 21 May 2019       issue date ※ 21 June 2019  
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