Mechanical Design of Compressor Test Apparatus for Electron Ring Accelerator Research

Electron cloud dynamics in the Cornell Electron Storage Ring Test Accelerator wiggler

The interference of stray electrons (also called ‘‘electron clouds’’) with accelerator beams is important in modern intense-beam accelerators, especially those with beams of positive charge. In magnetic wigglers, used, for instance, for transverse emittance damping, the intense synchrotron radiation produced by the beam can generate an electron cloud of relatively high density. In this paper th...

Rayleigh Test Apparatus Design Report

Low-Level RF System Design for the Accelerator Test Facility (ATF) Damping Ring

The ATF damping ring [1] was built to demonstrate the production of low emittance, high current beams for future linear colliders. To attain high beam currents, multiple high current bunch trains are required. The low-level rf system should be designed to minimize both steady-state and transient beam loading effects in the accelerating cavities. In addition the design should be sufficiently fle...

Mechanical Design of a Flexible Bunch Compressor for Aps Linac*

A bunch compressor has been installed in the APS linac to produce high peak currents for the FEL project and to explore the effects of coherent synchrotron radiation (CSR). The bunch compressor design is based on an asymmetric four-dipole chicane configuration in which asymmetry and variable R56 can be optimized to control CSR-induced emittance growth. This flexibility is achieved by allowing t...

Design of the Laser-Driven RF Electron Gun for the BNL Accelerator Test Facility

The BNL electron gun will incorporate a laser-driven photocathode in the wall of a 1 cell RF cavity operated at a peak field of 100 MV/m. Pulses of 4.5-MeV energy, 5-ps width, and 1-nC charge will be produced with very little emittance growth due to the effects of space-charge and nonlinear RF fields. The design of the gun was aided by extensive computer simulation described here.