A macroscopic model is established to describe the erosion of anode and cathode graphite electrodes. Results concerning electrode temperatures, spot radii and mass losses are presented for a current range from 0 to 10000 A. A comparison with several experimental measurements of mass losses is given.

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Triple-differential cross sections of charged pions were measured for collisions of Ne projectiles at E/A = 800 MeV with NaF, Nb, and Pb targets. The reaction plane was estimated event by event from the light-baryon momentum distribution. For heavy targets, preferential emission of charged pions away from the interaction zone towards the projectile side was observed in the transverse direction. Such a preferential emission, which is not predicted by cascade calculations, may be attributed to a stronger pion absorption by the heavier spectator remnant.