The emission of electromagnetic radiation from charged particles spiraling around magnetic fields is an important effect in astrophysical and laboratory plasmas. In theoretical modeling, issues still not fully resolved are, among others, the inclusion of the recoil force on the relativistic electron motion and the detailed computation of the radiation power spectrum. In this paper, the cyclotro...

2014 A brief outline is given of the processes of knock-on damage and electronic damage in electron microscopy together with estimates of the damage probabilities. Of the various remedial techniques under investigation, that of low temperature observation seems generally the most promising. Attention is drawn to some of the outstanding problems particularly concerning the nature and behaviour o...

These notes represent an introduction to the physics of synchrotron radiation. Such radiation is produced by relativistic electron beams being de‡ected by magnetic ...eld. Speci...cally, relativistic electron beams are injected into circular accelerators, called storage rings, where they circulate for many hours while continuously producing synchrotron radiation for the bene...t of research in ...

A radiation test plan for thin-film photovoltaic technologies focused on a MEO flight experiment is outlined. The proton and electron radiation response of thin film, amorphous Si solar cells and CuInGaSe2 solar cells, with and without space coatings, is presented. The degradation of the photovoltaic output under penetrating and junction-damaging proton irradiation, and 0.6 MeV and 1 MeV electr...

A Monte Carlo based computer model has been developed for electron beam computed tomography (EBCT) to calculate organ and effective doses in a humanoid hermaphrodite phantom. The program has been validated by comparison with experimental measurements of the CT dose index in standard head and body CT dose phantoms; agreement to better than 8% has been found. The robustness of the model has been ...

Noli turbare circulos meos—do not disturb my circles—was the final wish of Archimedes, who demanded that Roman soldiers not destroy the perfect circular forms he had drawn on the ground. The literal opposite is true for a team of researchers who have designed a new way to accurately measure the tiny shifts in an electron’s circular orbit as the particle moves in a magnetic field. The experiment...

3 Data assimilation aims to smoothly blend incomplete and inaccurate ob-4 servational data with dynamical information from a physical model, and be-5 come an increasingly important tool in understanding and predicting me-6 teorological, oceanographic and climate processes. As space-borne observa-7 tions become more plentiful and space-physics models more sophisticated, 8 dynamical processes in ...