The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - CONF
AU - Aumon, S.
AU - Doblhammer, A.
AU - Holzer, B.J.
AU - Härer, B.
AU - Oide, K.
ED - Zhao, Ning
ED - Poole, John
ED - Schaa, Volker RW
TI - Coupling and Dispersion Correction for the Tolerance Study in FCC-ee
J2 - Proc. of eeFACT2016, Daresbury, UK, October 24-27, 2016
C1 - Daresbury, UK
T2 - ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e^+e^- Colliders
T3 - 58
LA - english
AB - The FCC-ee study is investigating the design of a 100 km e⁺/e⁻ circular collider for precision measurements and rare decay observations in the range of 90 to 350 GeV center of mass energy with luminosities in the order of 10³⁵ cm⁻²s⁻¹. In order to reach such performances, an extreme focusing of the beam is required in the interaction regions with a low vertical beta function of 2 mm at the IP. Moreover, the FCC-ee physics program requires very low emittances never achieved in a collider with 1.3 nm for ε_{x} and 2 pm for ε_{y} at 175~GeV, reducing the coupling ratio to around 2/1000. With such requirements, any field errors and sources of coupling will introduce spurious vertical dispersion which degrades emittances, limiting the luminosity of the machine. This study describes the status of the tolerance study and the impact of errors that will affect the vertical emittance. In order to preserve the FCC-ee performances, in particular ε_{y}, a challenging correction scheme based on dispersion free steering and linear coupling correction is proposed to keep the coupling and the vertical emittance as low as possible.
PB - JACoW
CP - Geneva, Switzerland
SP - 151
EP - 156
KW - ion
KW - coupling
KW - emittance
KW - quadrupole
KW - lattice
DA - 2017/07
PY - 2017
SN - 978-3-95450-187-8
DO - 10.18429/JACoW-eeFACT2016-TUT3BH4
UR - http://jacow.org/eefact2016/papers/tut3bh4.pdf
ER -