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Precision Control of the Electron Longitudinal Bunch Shape Using an Emittance-Exchange Beam Line
We report on the experimental generation of relativistic electron bunches with a tunable longitudinal bunch shape. A longitudinal bunch-shaping (LBS) beam line, consisting of a transverse mask followed by a transverse-to-longitudinal emittance exchange (EEX) beam line, is used to tailor the longitudinal bunch shape (or current profile) of the electron bunch. The mask shapes the bunch’s horizontal profile, and the EEX beam line converts it to a corresponding longitudinal profile. The Argonne wakefield accelerator rf photoinjector delivers electron bunches into a LBS beamline to generate a variety of longitudinal bunch shapes. The quality of the longitudinal bunch shape is limited by various perturbations in the exchange process. We develop a simple method, based on the incident slope of the bunch, to significantly suppress the perturbations
Parity-Controlled 2 π Josephson Effect Mediated by Majorana Kramers Pairs
Not Available
Nonaffine Strains Control Ductility of Metallic Glasses
The origin of limited plasticity in metallic glasses is elusive, with no apparent link to their atomic structure. In this study, we propose that the response of the glassy structure to applied stress, not the original structure itself, provides a gauge to predict the degree of plasticity. We carried out high-energy x-ray diffraction on various bulk metallic glasses (BMGs) under uniaxial compression within the elastic limit and evaluated the anisotropic pair distribution function. We show that the extent of local deviation from the affine (uniform) deformation in the elastic regime is strongly correlated with the plastic behavior of BMGs beyond yield, across chemical compositions and sample history. The results suggest that the propensity for collective local atomic rearrangements under stress promotes plasticity.
Controlling Dzyaloshinskii-Moriya interactions in the skyrmion host candidates FePd 1 − x Pt x Mo 3 N
Not Available
Evaluation of power flow control for an all-electric warship power system with pulsed load applications.
Abstract not provided.
Structuring the Optimal Output Feedback Control Gain: A Soft Constraint Approach.
Abstract not provided.
Dakota and Pyomo for Closed and Open Box Controller Gain Tuning.
Abstract not provided.
A Comparison of Power Management Mechanisms: P-states vs. Node-Level Power Cap Control.
Abstract not provided.
Communication Requirements for Hierarchical Control of Volt-VAr Function for Steady-State Voltage.
Abstract not provided.
Time-Domain Analysis of Power System Stability with Damping Control and Asymmetric Feedback Delays.
Abstract not provided.
Null-Hypothesis Testing Using Distance Metrics for Verification of Arms-Control Treaties.
Abstract not provided.
Simulation Results for the Pacific DC Intertie Wide Area Damping Controller.
Abstract not provided.
Potential Impacts of Misconfiguration of Inverter-Based Frequency Control
Abstract not provided.