For the last few years astrophysicists and elementary particle physicists have been working jointly on the following fascinating phenomena: 1. The solar neutrino puzzle and the question: What happens to the neutrinos on their way from the sun to the earth? 2. The growing evidence that our universe is filled with about 10 times more matter than is visible and the question: What is dark matter made of? 3. The supernovae explosions and the question: What do neutrinos tell us about such explosions and vice versa? The experimental investigation of these phenomena is difficult and involves unconventional techniques. These are presently under development, and bring together such seemingly disparate disciplines as astrophysics and elementary particle physics on the one hand and superconductivity and solid-state physics on the other. This book contains the proceedings of a workshop held in March 1987 at which the above subjects and their experimental investigation were discussed. The proposed experimental methods are very new. They involve frontier developments in low temperature and solid-state physics. The book should be useful to researchers and students who actively work on these subjects or plan to enter the field. It also offers the non-expert reader with some physics background a good survey of the activities in this field.

As demonstrated by the contributions in this volume, the domain of superconducting and low-temperature devices is in a rapidly expanding phase. Interactions between materials sciences, low-temperature physics, astrophysics, nuclear and particle physics have provided the incentive for new experiments, which could ultimately record such rare interactions as double beta decay, neutrino scattering, or collisions of the elusive dark matter halo particles. The theoretical and experimental improvements achieved during the last year have been impressive. Detection of 60 keV resolution with a non-zero spin material as a target seems therefore realizable in the near future. Similarly, impressive achievements on ballistic phonons detection and superheated superconducting detectors have been presented, together with reliable techniques for developing ultra low noise electronics required by these ambitious experiments. Apart from the contributions presented during the symposium, the two original papers by Niinikoski proposing the use of bolometers as particle detectors have been included in this volume. These papers, despite their current interest, have never been published before. The comprehensive style of the papers will appeal to specialists and non-specialists alike, in particular solid-state physicists will find the volume of considerable interest, as the field of materials research continues to benefit from the type of work presented here.

The International Conference on Calorimetry in High Energy Physics has become the major forum for presenting the latest developments of calorimetry techniques. The eighth conference was attended by about 130 physicists from 20 countries and covered all aspects of calorimetric particle detection and measurements, with emphasis on high energy physics experiments.