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| MOYAA01 |
Commissioning of the MAX IV Light Source |
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- M. Eriksson, E. Al-Dmour, Å. Andersson, M.A.G. Johansson, S.C. Leemann, L. Malmgren, P.F. Tavares, S. Thorin
MAX IV Laboratory, Lund University, Lund, Sweden
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This presentation reports on the beam commissioning status of MAX IV, experience gained and lessons learned, as well as future plans.
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Slides MOYAA01 [6.682 MB]
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-MOYAA01
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| TUOAB03 |
Transverse Coherent Instabilities in Storage Rings with Harmonic Cavities |
1061 |
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- F.J. Cullinan, R. Nagaoka
SOLEIL, Gif-sur-Yvette, France
- G. Skripka, P.F. Tavares
MAX IV Laboratory, Lund University, Lund, Sweden
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Many current and future synchrotron light sources employ harmonic cavities to lengthen the electron bunches in order to reduce the emittance dilution caused by intrabeam scattering. In some cases, the harmonic cavities may be tuned to fulfill the flat potential condition. For this condition, a large increase in the threshold currents of transverse coupled-bunch instabilities has been predicted and recently, the physical content behind this stabilization has been better understood. With this in mind, an investigation is made into the effectiveness of harmonic cavities for different machines. Frequency domain computations employing Laclare's eigenvalue method have been used to investigate the influence of several machine parameters and the results are presented.
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Slides TUOAB03 [14.037 MB]
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-TUOAB03
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| TUPMB023 |
MAX IV 3 GeV Storage Ring Magnet Block Production Series Measurement Results |
1157 |
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- M.A.G. Johansson, L.-J. Lindgren, M. Sjöström, P.F. Tavares
MAX IV Laboratory, Lund University, Lund, Sweden
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The MAX IV 3 GeV storage ring magnets are integrated "magnet block" units consisting of several consecutive magnet elements precision-machined out of a common solid iron block. In the 3 GeV ring, there are 140 magnet blocks containing a total of 1320 magnet elements. During the manufacturing phase of the project, a field measurement was performed for each magnet element, by Hall probe and/or by rotating coil. This article presents an overview of the magnetic field measurement results that were obtained for the full production series.
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-TUPMB023
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| WEPOW035 |
Commissioning of the Harmonic Cavities in the MAX IV 3 GeV Ring |
2911 |
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- G. Skripka, Å. Andersson, A.M. Mitrovic, P.F. Tavares
MAX IV Laboratory, Lund University, Lund, Sweden
- F.J. Cullinan, R. Nagaoka
SOLEIL, Gif-sur-Yvette, France
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The MAX IV 3 GeV storage ring operates with beam of high current and ultralow emittance. These beam parameters in combination with the small effective aperture enhance possible collective beam instabilities. Three passive harmonic cavities are installed to introduce bunch lengthening and tune spread, leading to decoupling of the bunch spectrum from the machine effective impedance and mitigating instabilities by Landau damping respectively. In this paper we present the first results of the commissioning of the passive third harmonic cavities in the MAX IV 3 GeV ring. The additional harmonic cavity potential significantly improved the beam lifetime. First observations of the harmonic cavity effect on the damping of collective beam instabilities are discussed.
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| DOI • |
reference for this paper
※ DOI:10.18429/JACoW-IPAC2016-WEPOW035
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