Simulation Studies on the Vertical Emittance Growth at the Existing ATF Extraction Beamline (June 24, 2008).

Zhou, F. ; Amann, J. ; Seletskiy, S. ; Seryi, A. ; Spencer, C. M.

Technical Information Center Oak Ridge Tennessee

关键词: Accelerators;    Beam emittance;    Damping;    Magnets;    Optics;   

RP-ID  :  DE2008933005

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Significant beam intensity-dependence of the vertical emittance growth was experimentally observed at the Accelerator Test Facility (ATF) at KEK extraction beamline. This paper presents the simulations of possible vertical emittance growth sources, particularly in the extraction channel, where the magnets are shared by both the ATF extraction beamline and its damping ring. The vertical emittance growth is observed in the simulations by changing the beam orbit in the extraction channel, even with all optics corrections. The possible reasons for the experimentally observed dependence of the vertical emittance growth on the beam intensity are also discussed. An experiment to measure the emittance versus beam orbit at the existing ATF extraction beamline is on-going led by the European colleagues.