MAX IV Emittance Reduction and Brightness Improvement

Summary, in English

With MAX IV construction well underway and beam commissioning expected to commence in July 2015, first studies have been launched on improving the optics of the MAX IV 3 GeV storage ring with the goal of further reducing the emittance from the baseline design (320 pm rad) towards 150 pm rad while improving the matching of the electron beam to insertion devices to further improve the resulting photon brightness. We report on progress in the development of this new optics as well as studies of the impact of many strong insertion devices on beam emittance. The latter is an crucial issue in ultralow-emittance rings where dipole radiation losses are low and hence the equilibrium emittance is determined to large extent by the insertion devices. Additionally, large stored current can lead to a significant increase of emittance via strong intrabeam scattering in both transverse and longitudinal planes. Hence, the anticipated insertion devices, stored bunch current, and RF cavity tuning all have to be taken into account when optimizing for highest brightness. We present initial results and sketch a path towards a first MAX IV upgrade.

• Author: Simon Leemann; Mikael Eriksson
• Department/s: MAX IV Laboratory
• Publishing year: 2014
• Language: English
• Pages: 1615-1617
• Publication/Series: Proceedings of IPAC’14
• Full text: - 216 kB; Download statistics
• Links: http://accelconf.web.cern.ch/AccelConf/IPAC2014/papers/tupri026.pdf
• Document type: Conference paper
• Publisher: JACoW Publishing
• Topic: Physical Sciences; Natural Sciences
• Conference name: 5th International Particle Accelerator Conference, IPAC 2014
• Conference date: 2014-06-15 - 2014-06-20
• Conference place: Dresden, Germany
• Status: Published
• ISBN/ISSN/Other: ISBN: 978-3-95450-115-1