Phys. Rev. ST Accel. Beams 5, 122801 (2002) [10 pages]Measurement of a small vertical emittance with a laser wire beam profile monitor
We describe in this paper a measurement of vertical emittance in the Accelerator Test Facility (ATF) damping ring at KEK with a laser wire beam profile monitor. This monitor is based on the Compton scattering process of electrons with a laser light target which is produced by injecting a cw laser beam into a Fabry-Perot optical cavity. We installed the monitor at a straight section of the damping ring and measured the vertical emittance with three different ring conditions. In all cases, the ATF ring was operated at 1.28 GeV in a single bunch mode. When the ring was tuned for ultralow emittance, the vertical emittance of εy=(1.18±0.08)×10-11 mrad was achieved. This shows that the ATF damping ring has realized its target value also vertically. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevSTAB.5.122801
DOI:
10.1103/PhysRevSTAB.5.122801
PACS:
07.60.Ly, 41.75.Ht, 42.60.Da
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