Superconducting RF cavities for High Current Energy Recovery Linacs
Superconducting RF cavities for High Current Energy Recovery Linacs
Superconducting RF cavities for High Current Energy Recovery Linacs
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HOMs - Multibunch BBU<br />
Trapped Modes (k cell−cell , N cells , Q ext )<br />
I thr =<br />
e<br />
(<br />
R<br />
Q<br />
−2p r c<br />
)Q e k m M 12 sin(ω m t r )e − ωm<br />
2Qe tr<br />
Parameter BNL(HC) CEBAF(HG) TESLA(HG)<br />
k || (σ z − 1mm) [V/pC] 4.25 10.71 13.14<br />
k ⊥ (σ z − 1mm) [V/pC/m] 0.1 2.24 2.07<br />
Q ext (Dipole) 10 2 − 10 4 10 3 − 10 6 10 3 − 10 7<br />
Single Pass (HG) Vs. Multiple Passes (HC + Magnets)