Electron Cloud Buildup Analysis for the DTC03 ILC Damping Ring Lattice

Parameters for Electron Cloud Buildup and Instability Simulations 2012, M.T.F. Pivi 29.02.2012

Photon Absorption Rates and Distributions for the ILC Damping Ring (dtc03) by Ring Region, G. Dugan, 02.03.2012



Electron cloud density averaged over 20-sigma beam region

Secondary yield model for rediffused and elastic components for an uncoated aluminum vacuum chamber (δrediffused = 0.19, δelastic = 0.5)

Drift

Solenoid (40G)

Quadrupole (10 T/m)

Sextupole (70 T/m2)

Wiggler Region

4.0e12

0

1.2e12

None

Arc1 Region

0.25e12

0

0.15e12

0.14e12

Arc2 Region

0.25e12

0

0.17e12

0.13e12

Secondary yield model for rediffused and elastic components from cloud lifetime measurements in a TiN-coated aluminum vacuum chamber (δrediffused = 0.1, δelastic = 0.2)

Drift

Solenoid (40G)

Quadrupole (10 T/m)

Sextupole (70 T/m2)

Wiggler Region

2.5e12

0

0.8e12

None

Arc1 Region

0.20e12

0

0.10e12

0.10e12

Arc2 Region

0.20e12

0

0.10e12

0.10e12