[en] This chapter reports on the superconducting lead technology developed and implemented on the linear particle accelerator (linac) at the State University of New York, Stony Brook. The Stony Brook linac consists of 43 separate drum-shaped (approximately 40 cm diameter by 22 cm long) OFHC copper resonators covered with 5 to 10 microns of Pb. The performance of any individual resonator (as measured by its Q-factor and peak surface electric field) is crucially dependent upon the quality of the Pb layer. Topics considered include substrate preparation, electrolyte preparation, electroplating, chemical polish, and handling. The resonators reach 3 MV/m at a consumption of 7 watts. It is concluded that the advantages of low cost and ease of handling has made lead plating superconducting resonators a viable and effective option for accelerator applications

[en] The performance of pulse tube coolers is being studied in order to determine their suitability for development into long-life space coolers. Coolers based on the pulse tube phenomenon appear to be attractive for long-life space application because of their inherent simplicity. Single-stage and two-stage pulse tube test coolers have been designed and tested. In these early tests a single stage cooler has achieved a low temperature of 53 K while rejecting heat above 300 K. An unoptimized two-stage cooler has reached 26 K while rejecting heat above 300 K. Performance measurements for the coolers is presented. 15 refs

[en] The state of the art of cryocoolers for space-based electronics and sensors is reviewed. Coolers under consideration include flexure-bearing and magnetic-bearing type Stirling coolers, pulse tube coolers, Vuilleumier coolers, magnetocaloric refrigerators, closed cycle Joule-Thompson coolers, sorption refrigerators, and reverse Brayton cycle refrigerators. The compromises among these systems in terms of reliability, efficiency, size, vibration, and system interface are discussed. 50 refs