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Lifetime Measurement of ATF Damping Ring
The purpose of the ATF damping ring is the development of technologies
for producing a low emittance beam required in future linear colliders
such as JLC. The lifetime of the damping ring is very short
(typically a few minutes). It is limited by elastic beam-gas
scattering along with a small dynamic aperture, and by single
intra-beam scattering (Touschek effect). The Touschek lifetime
strongly depends upon the charge density of the beam, especially, the
size of the vertical emittance. In this paper, we report the results
of beam lifetime measurements in the ATF damping ring and the
estimation of the vertical emittance from these measurements.
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