Showing papers by "University of Milano-Bicocca published in 1990"
01 Apr 1990-Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment
TL;DR: The ELFA (Electron Laser Facility for Acceleration) has both a fundamental and a technological novel goal: (i) the fundamental goal is to test with short bunches the existence of three different high-gain regimes at the heart of FEL physics: the already observed steady-state regime and the two novel regimes of cooperative synchrotron radiation, i.e., weak and strong superradiance; (ii) the technological goal consists in exploring the possibilities of matching the advanced technologies of high gain FELs and of superconductive acceleration as discussed by the authors.
Abstract: ELFA (Electron Laser Facility for Acceleration) has both a fundamental and a technological novel goal: (i) the fundamental goal is to test with short bunches the existence of three different high-gain regimes at the heart of FEL physics: the already observed steady-state regime and the two novel regimes of cooperative synchrotron radiation, i.e., weak and strong superradiance ; (ii) the technological goal consists in exploring the possibilities of matching the advanced technologies of high-gain FELs and of superconductive acceleration. The experimental apparatus—photocathode injector, accelerating structure with 352 MHz superconducting cavities, wiggler — is discussed with emphasis on the problems related to the very high current, I ≅ 400 A. Alternative normal-conducting acceleration schemes at 425 MHz are also discussed. The applications of ELFA should range from high-gradient particle acceleration to plasma heating and condensed matter physics.
17 citations
TL;DR: In this article, free electron laser dynamics in the presence of a rectangular waveguide for high-gain amplification of microwave radiation was investigated in the steady-state Compton regime, and the linear theory predicts the instability threshold of the system and explains basic effects of mode competition, such as higher peak powers, broader accessible energy ranges and reduced saturation lengths.
3 citations