Paper | Title | Page |
---|---|---|
TUFO03 |
Status of High Current R&D Energy Recovery Linac at Brookhaven National Laboratory
BNL USA
We present the design and the parameters of a small test Energy Recovery Linac (ERL) facility, which is under construction at Collider-Accelerator Department, BNL. This R&D facility has goals to demonstrate CW operation of ERL with average beam current in the range of 0.1 - 1 ampere, combined with very high efficiency of energy recovery. The heart of the facility is a 5-cell 703.75 MHz super-conducting RF linac with HOM damping. Flexible lattice of ERL provides a test-bed for testing issues of transverse and longitudinal instabilities and diagnostics of intense CW e-beam. ERL is also perfectly suited for a far-IR FEL. We present the status and our plans for construction and commissioning of this facility. |
76 |
WEJO07 |
Nonlinear Compton Scattering And Its Application To Polarized Positron Source for ILC
We propose a novel gamma-source suitable for generating a polarized positron beam for the next generation of electron-positron colliders, such as the International Linear Collider (ILC) and the Compact Linear Collider (CLIC). This 40-MeV polarized gamma-source is based on Compton scattering inside a picosecond CO2 laser cavity from electron bunches produced by a 4-GeV linac. We identified and experimentally verified the optimum conditions for generating at least one gamma photon per every electron. After multiplication at several consecutive interaction points, the gamma-rays so produced will be stopped on a target, thereby creating a copious numbers of circularly polarized positrons. We address the practical feasibility of having an intra-cavity Compton polarized positron source as the injector for these new colliders. |