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Institute Science and Technology of Accelerating Systems

Higher Harmonic RF Systems at HZB – Advancing normal conducting RF Technology

Overview

The High Harmonic Cavity (HHC) developments at Helmholtz-Zentrum Berlin (HZB) is a pioneer project with more than 20 years expertise in advanced RF technology. This project covers the design, operation and integration of actively driven high-harmonic cavities into the high current storage rings.

Project Goals

  • Enhanced Beam Performance – Enabling simultaneous storage of long and short electron bunches in the high current storage ring, explore the beam lifetime and stability performance.
  • Explore RF Technology – Development of new class of normal conducting RF cavities and related ancillaries with ultimate higher-order-mode damping being essential for stable operation of the high current storage rings and CW linacs
  • Integration in Storage Ring – development of individual technical & RF solutions given by hard space limits of the storage rings.
  • Collaboration & Innovation – A joint effort involving HZB and global research partners to advance the high-harmonic cavity technology and development of common standards for this class of cavities and related ancillaries – with the EU HOM-Damped Cavities representing a first major success.

 

enlarged view

EU HOM-Damped 1.5 GHz Cavity

Publications

  • F. Pérez, A. Matveenko, M. Ries, A. Tsakanian et al.: Active harmonic EU cavity: Commissioning and operation with beam, Nuclear Inst. and Methods in Physics Research, A 1072 (2025) 170195.
  • F. Pérez, W. Anders, A. Matveenko, M. Ries, A. Tsakanian et al., 3HC- Third Harmonic Normal Conducting Active Cavity Collaboration between HZB, DESY and ALBA, Proc. of 13th Intern. Part. Accel. Conf. (IPAC’22), Bangkok, Thailand, 2022, pp. 1471-1474. Link
  • E. Weihreter: Status of the European HOM Damped Normal Conducting Cavity, Proc. of Europ. Part. Accel. Conf. (EPAC’08), Genova, Italy, 2008, pp. 2932-2936. Link
  • E. Weihreter, V. Dürr, F. Marhauser, A Ridged Circular Waveguide Ferrite Load for Cavity HOM Damping, Proc. of Europ. Part. Accel. Conf. (EPAC’06), Edinburgh, Scotland, 2006, pp. 1280-1282. Link
  • W. Anders, P. Kuske, HOM Damped NC Passive Harmonic Cavities at BESSY, Proc. of Part. Accel. Conf. 2003, Portland, Oregon, USA, 2003, pp. 1186 -1188. Link
  • P. vom Stein, M. Pekeler, H. Vogel, W. Anders, S. Belomestnykh, J. Knobloch, H. Padamsee, A Superconducting Landau Accelerator Module for BESSY II, Proc. of Part. Accel. Conf. 2001, Chicago, USA, 2001, pp. 1175 -1176. Link
  • M. Georgsson, W. Anders, D. Krämer, J. M. Byrd, Design and commissioning of third harmonic cavities at BESSY II, Nuclear Inst. and Methods in Physics Research A 469, 2001, pp. 373-381.
  • F. Marhauser, E. Weihreter et al, Numerical Simulations of a HOM Damped Cavity, Proc. of Europ. Part. Accel. Conf. (EPAC 2000), Vienna, Austria, 2000, pp. 1972-1974. Link

Contact

Prof. Dr. Adolfo Velez Saiz Telefon / Phone (030) 8062 - 15069
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