Radiation protection systems for the final focus test beam at SLAC.

Estb: a New Beam Test Facility at Slac*

End Station A Test Beam (ESTB) is a beam line at SLAC using a small fraction of the bunches of the 13.6 GeV electron beam from the Linac Coherent Light Source (LCLS), restoring test beam capabilities in the large End Station A (ESA) experimental hall. ESTB will provide one of a kind test beam essential for developing accelerator instrumentation and accelerator R&D, performing particle and parti...

Polarized Positrons at a Future Linear Collider and the Final Focus Test Beam

Having both the positron and electron beams polarized in a future linear e+e−collider is a decisive improvement for many physics studies at such a machine. The motivation for polarized positrons, and a demonstration experiment for the undulator-based production of polarized positrons are reviewed. This experiment (‘E-166’) uses the 50 GeV Final Focus Test electron beam at SLAC with a 1 m-long h...

Radiation Safety Considerations for the Parasitic Final Focus Test Beam at SLAC*

A low intensity electron beam parasitic to the operation of the Stanford Linear Collider (SLC) has been transported through the Final Focus Test Beam (FFTB) facility making secondary test beams available for users. Photons generated in collimation of the SLC electron and positron beams in the linac pass through a splitter magnet that deflects the primary beams away from the linac axis into the ...

First Results from the Final Focus Test Beam*

We have used the Final Focus Test Beam beamline and associated instrumentation to reduce the 46.6 GeV SLAC electron beam to a vertical size of 70 nm. This represents a reduction from the linac beam size by a factor of 320, comparable to the demagnification required by a TeV-scale linear collider, and addresses the same aberrations predicted in such an environment. The beam dimensions were measu...

A Proposal to Test A High Resolution, Single Bunch, Beam at the SLAC Final Focus Test Profile Monitor Beam