Application of International Linear Collider superconducting cavities for acceleration of protons

[摘要]

Beam acceleration in the International Linear Collider (ILC) will be provided by 9-cell 1300 MHz superconducting (SC) cavities. The cavities are designed for effective acceleration of charged particles moving with the speed of light and are operated on $\pi$-mode to provide a maximum accelerating gradient. A significant research and development effort has been devoted to develop ILC SC technology and its rf system which resulted in excellent performance of ILC cavities. Therefore, the proposed 8-GeV proton driver in Fermilab is based on ILC cavities above $\sim 1.2\mathrm{GeV}$. The efficiency of proton beam acceleration by ILC cavities drops fast for lower velocities and it was proposed to develop squeezed ILC-type (S-ILC) cavities operating at 1300 MHz and designed for ${\beta }_G=0.81$, geometrical beta, to accelerate protons or ${\mathrm{H}}^{-}$ from $\sim 420\mathrm{MeV}$ to 1.2 GeV. This paper discusses the possibility of avoiding the development of new ${\beta }_G=0.81$ cavities by operating ILC cavities on $\frac{8}{9}\pi$-mode of standing wave oscillations.

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• Received 15 August 2007

[发布日期] 2007-12-14