A thin dielectric slab over a conducting sheet is a low-loss slow-wave guiding system. When one introduces a magnetic wiggler into the system one may efficiently excite millimeter waves by passing a sheet electron beam just above the dielectric surface. For realistic parameters, the energy requirements on the beam are greatly reduced due to the wiggler. The frequency u, and the growth rate G ar...

The slotted waveguide slow-wave stochastic cooling arrays are an integral part of the 4-8 GHz Debuncher Upgrade at FNAL. Unlike the standard array of stripline electrodes, these structures are designed to work when the beam pipe can support many microwave modes. The design theory and beam measurement results of this new type of pickup structure will be presented in this paper.

This paper discusses a method for extracting the frequency dependent parameters of lossy bransmission lines from TDtUTDT measurements. These parameters were extracted for stripline structures in printed wiring boards. Using short -thru calibration, the transmission line parameters were extracted using a combination of time windowing and rational functions.

We have constructed several impedance-matched low-pass filters using a stripline geometry with a dissipative dielectric. The filters are compact, simple to construct, and operate in cryogenic environments. The dissipative dielectric consists of magnetically-loaded silicone or epoxy, which is commercially available under the trade name Eccosorb. For a stripline length of 32 mm, the filters have ...

The elaboration of the signals provided by the fourstripline Beam Position Monitors (BPM) on the superconducting linac TTF will be accomplished by parallel rf circuits, giving a signal of ~1 V /cm, indipendent of beam current, for both horizontal and vertical beam positions with time response ~1μs. and useful range > ±1 cm The performances with respect to thermal drifts and input dynamics are p...

The Doppler shift of the quasiparticle dispersion by charge currents is responsible for critical supercurrents in superconductors and instabilities magnetic ground state metallic ferromagnets. Here we predict an analogous effect thin films insulators which microwaves emitted a proximity stripline generate coherent chiral spin that cause magnon dispersion. spin-wave instability suppressed magnon...

The behavior of beam pickup and kickers subjected to the electromagnetic fields of relativistic charged particles is examined. The concept of image currents is explained. The frequency domain response of a simple stripline pickup is derived and the behavior of kickers is explained through Lorentz reciprocity.

We report on some unusual nonlinear dynamics observed in several NbN superconducting stripline microwave resonators. Among the nonlinear effects observed: abrupt bifurcations within the resonance lineshape, hysteretic behavior, hysteresis loops changing direction, resonance shift and critical coupling. Weak links forming at the boundaries of the columnar structure of the NbN films are hypothesi...