A low emittance, flat-beam electron source for linear colliders

A Low Emittance, Flat-beam Electron Source for Linear Colliders

We present a method to generate a flat (large horizontal to vertical emittance ratio) electron beam suitable for Linear Colliders. The concept is based on a round-beam rf-laser gun with finite solenoid field at the cathode together with a special beam optics adapter. Computer simulations of this new type of beam source show that the beam quality required for a Linear Collider may be obtainable ...

A Final Focus System for Flat-Beam Linear Colliders*

A final focus system is designed for a flat-beam linear collider with the parameters suggested by R. B. Palmer. A method of chromaticity correction which uses one family of sextupole is realized so as to correct both horizontal and vertical chromaticities simultaneously. A computer code has been written to find the solution, and a result with a momentum acceptance twice that of Palmer’s require...

Emittance Preservation in Linear Colliders*

The Transverse Wakefield and Beam Break-up ..................... -4.1 The Transverse Wake ................................ 9 9 4.2 Transverse Beam Break-up and ‘Landau Damping’ . . . . . . . . . . . . . . . Pulse to Pulse Changes: Jitter ............................ 5.1 Injection Jitter .................................. 5.2 Quadrupole Alignment Jitter ........................... 5.3 Jitter of ...

Linear Electron-Electron Colliders

Emittance of a field emission electron source

An analytical formula of the emittance of a field emitter is given. In contrast to thermal and photoemission, such a formula contains complexity due to the multidimensional nature of the source. A formulation of emittance is given for oneand three-dimensional 3D field emitters. The 3D formulation makes use of the point charge model of a unit cell emitter coupled with a trajectory analysis to fo...