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Summary form only given. Motivated by the current interest in THz source, where miniature circuits are usually required, we evaluate the effects of geometrical random errors introduced during the manufacturing processes on the circuit characteristics. One such study was given in a previous paper, where a pisection lumped element was used to model a periodic slow wave structure. In this paper, we extend...
Summary form only given. Initial magnetic priming experiments performed on the UM/Titan relativistic magnetron (6-vane, -300 kV, 5-10 kA, 0.3-0.5 mus) have shown improvements in magnetron performance over baseline operation. In the current experimental setup, three, 4-cm magnetic wires (Mu-Metal) are located within the cathode structure, centered beneath the emission region, and spaced 120 degrees...
Summary form only given. Phase-locking is utilized today in many important applications, ranging from small scale devices such as cardiac pacemakers to large scale devices such as radar. In the development of high power microwave sources, phase-locking of relativistic magnetrons has also been extensively studied. Conditions for phase-locking usually involve the well-known Adler's relation, which predicts...
Summary form only given. The time-dependent behavior of electron sheaths in a magnetically insulated B>BHull anode-cathode gap with crossed electric and magnetic fields is studied. The crossed field, space-charge limited diode is modeled for various magnetic fields by means of multidimensional (1D and 2D), self consistent, electromagnetic, particle-in-cell (PIC) simulations in both cylindrical...
Summary form only given. Electron multipactor breakdown of the dielectric window separating vacuum from a gas in a high power microwave system is a common problem that limits the output power of the system. This study examines the impact of finite waveguide geometries and low and moderate pressure gases on electron multipactor growth and power deposition on the dielectric window. The spatial and temporal...
Summary form only given. Recent simulations of an idealized, high wire-number array Z-pinch reveal a strong azimuthal clumping instability. This instability is due to the mutual attraction of neighboring wires that carry current in the same direction. The unstable modes are heavily crowded, the most unstable mode being the pi-mode, where the neighboring wires pair together. The temporal evolution...
Summary form only given. Pulsed electric fields (PEFs) are frequently used to permeabilize the cell membrane so that chemotherapeutics, DNA, and other molecules unable to enter the cell can traverse the cell membrane. Our laboratory recently used intense, ultrawideband (UWB) electrical pulses with chemotherapeutics to kill leukemia cells in numbers greater than predicted by simple addition of the...
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