Speaker
Description
Idealized models predict beam moments and envelopes, but not the detailed beam structure within those envelopes. We explore in experiment and simulation the interplay of space charge and angular momentum with realistic beam distributions in a low-energy transport system. Our realistic phase space distributions derive from direct experimental measurements near the beam source. The platform for this work is our Long Solenoid Experiment (LSE), a beam line designed to explore flat-to-round (FTR) and round-to-flat (RTF) beam transformations where space charge is a significant factor. Our transport system employs a thermionic electron gun, a slit mask, and skew quadruples to generate and manipulate flat beams with emittance ratios up to 20:1. The LSE is equipped with a sliding view-screen, enabling detailed phase space diagnostics over multiple plasma periods. We present simulations, initialized with realistic phase space distributions and validated against experimental results, that reveal the sensitivities of transverse beam dynamics to specific initial conditions and lattice parameters.
Funding Agency
US DOE-HEP grants: DE-SC0010301 and DE-SC0022009
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