|THZBB3||Novel Emittance Measurement Combining Foil Focusing and Pepper-Pot Techniques||961|
Funding: Work supported by the US National Nuclear Security Agency and the US Department of Energy under contract DE-AC52-06NA25396.
In this paper, we describe a direct measurement of foil focusing of an intense, relativistic electron beam com-bined with the pepper-pot technique to perform emit-tance measurements. Foil focusing occurs when a thin, grounded, conducting foil shorts out the radial electric field of a transiting electron beam, causing its self-magnetic field to focus the beam. A 40-ns pulse was extracted from the main pulse of the 16-MeV, 1.65 kA beam from Axis-II of the Dual Axis Radiographic Hy-drodynamic Test Facility to perform the measurements. We show that not accounting for foil focusing signifi-cantly reduces the measured emittance.
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|DOI •||reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2019-THZBB3|
|About •||paper received ※ 27 August 2019 paper accepted ※ 15 September 2019 issue date ※ 08 October 2019|
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