A Collective Accelerator for Electron Colliders

Accelerator Physics Issues for Future Electron-ion Colliders

Interest continues to grow in the physics of collisions between electrons and heavy ions, and between polarized electrons and polarized protons [1, 2, 3]. Table 1 compares the parameters of some machines under discussion. DESY has begun to explore the possibility of upgrading the existing HERA-p ring to store heavy ions, in order to collide them with electrons (or positrons) in the HERA-e ring,...

Accelerator Structures for Linear Colliders

Linear Colliders require high gradient (to reduce length dependent costs), high shunt impedance (to reduce power dependent costs) accelerator structures in which the long range dipole wakefields have been reduced by 2 to 3 orders of magnitude. The precise dipole wake reduction factor required depends on many factors. These include the beam intensity and time structure, the accelerator aperture ...

Room Temperature Accelerator Structures for Linear Colliders*

Early tests of short low group velocity and standing wave structures indicated the viability of operating Xband linacs with accelerating gradients in excess of 100 MeV/m. Conventional scaling of traveling wave traveling wave linacs with frequency scales the cell dimensions with λ. Because Q scales as λ, the length of the structures scale not linearly but as λ in order to preserve the attenuatio...

Linear Electron-Electron Colliders

An Electron Source for a Laser Accelerator*

Laser accelerators offer the promise of producing attosecond electron bunches from a compact accelerator. Electron source requirements for laser accelerators are challenging in several respects, but are achievable. We discuss these requirements, and propose an injector design. Simulation and design work for essential components for a laser accelerator electron source suitable for a high energy ...