JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{voelker:ipac2022-thpotk001,
author = {J. Völker and V. Dürr and P. Goslawski and A. Jankowiak and M. Titze},
title = {{Variable Permanent Hybrid Magnets for the Bessy III Storage Ring}},
booktitle = {Proc. IPAC'22},
% booktitle = {Proc. 13th International Particle Accelerator Conference (IPAC'22)},
pages = {2763--2766},
eid = {THPOTK001},
language = {english},
keywords = {dipole, lattice, quadrupole, HOM, storage-ring},
venue = {Bangkok, Thailand},
series = {International Particle Accelerator Conference},
number = {13},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {07},
year = {2022},
issn = {2673-5490},
isbn = {978-3-95450-227-1},
doi = {10.18429/JACoW-IPAC2022-THPOTK001},
url = {https://jacow.org/ipac2022/papers/thpotk001.pdf},
abstract = {{The Helmholtz Zentrum Berlin (HZB) is working on the conceptual design of a successor source to BESSY II, an new BESSY III facility, designed for a beam energy of 2.5GeV and based on a multi-bend achromat (MBA) lattice for a low emittances of 100pm-rad. Bending and focusing magnets in the MBA cells should consist of permanent magnets (PM), to allow for a competitive and compact lattice, to increase the magnetic stability and to decrease the electric power consumption of the machine. However, using pure permanent magnet systems would result in a completely fixed lattice. Therefore, we are developing Variable Permanent Hybrid Magnets (VPHM), combining PM materials like NdFeB with a surrounding soft iron yoke and additional electric coils. This design can achieve the same field strength and field quality as conservative magnets, with only a small fraction of the electric power consumption, and a ca. 10% variability in the field amplitudes. In this paper, design and first optimization results of the magnets will be presented, which are a promising option for the new BESSY III facility, and an estimated reduction in total power consumption for the magnet lattice of up to 80%.}},
}