Application of International Linear Collider superconducting cavities for acceleration of protons

P N Ostroumov,B Rusnak,I V Gonin,V N Aseev

doi:10.1103/physrevstab.10.120101

Abstract

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 maximum accelerating gradient. Significant R&D effort has been devoted to develop ILC SC technology and its RF system which resulted excellent performance of ILC cavities. Therefore, the proposed 8-GeV proton driver in Fermilab is based on ILC cavities above {approx}1.2 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}{sub G} = 0.81, geometrical beta, to accelerate protons or H{sup -} from {approx}420 MeV to 1.2 GeV. This paper discusses the possibility of avoiding the development of new {beta}{sub G} = 0.81 cavities by operating ILC cavities on 8/9{pi}-mode of standing wave oscillations.

Highlights

Fermilab proposed to develop an Hÿ 8-GeV linac, or ‘‘proton driver’’ (PD) [1], with the principal mission to raise the intensity of the main injector (MI) to produce so-called superbeams for neutrino studies
In this paper we present applications of International Linear Collider (ILC) cavities for the acceleration of protons from 600 to 1050 MeV which allows us to avoid the development of squeezed ILC-type (S-ILC) cavities
In the energy range from 600 MeV to 1050 MeV, protons can be accelerated by ILC cavities tuned to operate at 1300 MHz on 8=9-mode

Summary

Rusnak

Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550, USA (Received 15 August 2007; published 14 December 2007). 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 -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. The proposed 8-GeV proton driver in Fermilab is based on ILC cavities above 1:2 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 G 0:81, geometrical beta, to accelerate protons or Hÿ from 420 MeV to 1.2 GeV.

INTRODUCTION

PROPERTIES OF ILC CAVITIES OPERATING

OPTIMAL TUNING OF CAVITY COUPLERS FOR APPLICATION IN A PROTON LINAC

Findings

CONCLUSION