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Argonne Wakefield Accelerator Facility

Argonne Cathode Test-stand

ACT
The Argonne Cathode Test-stand (ACT) at AWA is a flexible and well-instrumented beamline dedicated to electron source research including field emission, photoemission, and other advanced emission mechanisms.

It mainly consists of an L-band normal-conducting high gradient single-cell rf gun with detachable cathode and a unique imaging system to precisely locate emitters on surface with a resolution of 20 um. Depending on cathode shape, a cathode electric field up to 700 MV/m is achievable for emission study. Various cathode properties, such as emission current, current density, uniformity, quantum efficiency, emittance, lifetime, could be characterized with well-developed diagnostics. The ACT beamline is also designed to be user-friendly with short cathode switching period and flexible running schedule.