[en] This paper reports on a two-dimensional computer program developed, aiming at a rapid evaluation of the eddy-current-induced magnetic field in a ramped dipole magnet with a conducting beam tube. The program is based on a closed-form sum of the infinite number of mirror currents representing the additional influence of the iron in the poles. Various tube profiles can be put in. The results of the program have been compared with calculations using the POISSON code. The agreement is very good, even for beam pipes extending out near to the pole edges. Calculations of the temperature distribution in the walls of a rectangular beam- tube, cooled by a pattern of water-pipes, have been done, by the POISSON code also, in order to minimize the outgassing from the walls. A typical result is given