No abstract available

[en] A non linear analysis of a new free electron laser oscillator configuration is presented. Procedures and design examples for both tapered and untapered 300 GHz 1.0 MW Fel oscillators are determined and discussed. (A.C.A.S.)

[en] In this paper, the application of a novel fast optical-imaging camera, TimepixCam, to molecular photoionization experiments using the velocity-map imaging technique at a free-electron laser is described. TimepixCam is a 256 × 256 pixel CMOS camera that is able to detect and time-stamp ion hits with 20 ns timing resolution, thus making it possible to record ion momentum images for all fragment ions simultaneously and avoiding the need to gate the detector on a single fragment. This allows the recording of significantly more data within a given amount of beam time and is particularly useful for pump–probe experiments, where drifts, for example, in the timing and pulse energy of the free-electron laser, severely limit the comparability of pump–probe scans for different fragments taken consecutively. Finally, in principle, this also allows ion–ion covariance or coincidence techniques to be applied to determine angular correlations between fragments.

[en] The performance over the past year and the current user-relevant characteristics of the User Facility FELIX will be discussed. Also the existing plans for improving and extending the capabilities and provisions will be presented

No abstract available

[en] The Vanderbilt University Free Electron Laser Center for Biomedical and Materials Research is a users facility that is developing into a regional, national, and international resource. The Vanderbilt FEL will provide continuously tunable, pulsed radiation from the UV to the IR and will serve as a radiation source for frontier experiments in FEL applications in materials and biomedical sciences. This program carries on the strong tradition of interdisciplinary cooperation at the University and is characterized by the common goals of both understanding nonthermal mechanisms in nature and developing their biomedical and materials applications. (orig.)

[en] This issue is the collection of the papers presented at the title meeting. The 18 of the presented papers are indexed individually. (J.P.N.)

[en] The Free Electron Laser (FEL) has reached a stage of development, in which serious consideration of its potential use in fusion resarch becomes obvious. The principles of operation of the FEL are discussed, togheter with the simil arities and differences with classical devices like gryotons on the one hand,and ordinary lasers on the other hand. The FEL's potentially high efficiency and large unit size, combined with tunability, are among the outstanding characteristics. It is to be expected that operation in the 'optical guiding' regime, for which criteria will be given, is the route to enhanced performance of the divices. An overview is presented of current project for FEL develoment, either indirect connection with, of possibly relevant for, fusion. Applications inthis ara include both heatin, profile control and diagnostics in magnetic fusion, and driving implosions o onertial confinement. (author). 12 refs.; 7 figs.; 1 tab

[en] Many industrial and research applications can benefit from the availability of a compact, user-friendly, broadly tunable and high average power free electron laser (FEL). Over the past four years, the Los Alamos Advanced FEL has been built with these design goals. The key to a compact FEL is the integration of advanced beam technologies such as a high-brightness photoinjector, a high-gradient compact linac, and permanent magnet beamline components. These technologies enable the authors to shrink the FEL size yet maintain its high average power capability. The Advanced FEL has been in operation in the near ir (4-6 μm) since early 1993. Recent results of the Advanced FEL lasing at saturation and upgrades to improve its average power are presented

[en] Based on the experimental results of our low-voltage (1-10 kV) free-electron- and cyclotron-resonance-maser experiments, we present in this talk several goals for our future studies. These include new compact schemes of low-voltage high-power masers, and of two-stage maser-law devices