ELECTRON SPIN RESONANCE IN NEUTRON IRRADIATED SILICON

Abstract not availabl

Cooling and packaging of RF components

The ideal cryogenic refrigerator (“cryocooler” or “cooler”) for cooling superconducting RF components should have a cooling power of a few Watts at the desired operating temperature, with an input power of also only a few Watts. Furthermore, it would be nice if it had infinite operating lifetime and costs only a few dollars. More wishes can be made, but it is obviously clear that such an ideal cooler, unfortunately, does not exist. Therefore, in the design of the complete system, a trade-off has to be made to compromise these wishes or requirements. In this trade-off process, device design and cryopackaging design have to interact. For example, a lower operating temperature may be desirable from the point of view of device performance while a lower temperature will necessitate a cooler that is bigger, heavier and more expensive. In this chapter, the cryopackaging aspects are considered. The main questions to be answered are: How do available coolers work? What are trends in cooling What are the important aspects in packaging

Argonne National Laboratory Reports

The abstracts are given of thirteen papers presented at a ''SQUID Symposium'' organized by the Division of Materials Sciences of the U.S. Department of Energy and held March 23-25, 1978, at the University of Virginia. Since SQUID systems have already been utilized in feasibility demonstration in geothermal reservoir exploration, it was recognized that these devices also hold great potential for many other important scientific measurements. Many of these are energy-related, and others include forefront investigations in a diverse group of scientific areas, from biomedical to earthquake monitoring. Research in SQUIDs has advanced so rapidly in recent years that it was felt that a symposium to review the current status and future prospects of the devices would be timely. The abstracts given present an overview of work in this area and hopefully provide an opportunity to increase awareness among basic and applied scientists of the inherent implications of the extreme measurement sensitivity in advanced SQUID systems