[en] The GEM calorimeter includes a large cryogenic noble liquid system with both electromagnetic and hadronic sections. The electromagnetic section employs accordion technology, while the hadronic sections are constructed from parallel plate absorber and readout boards. The system is divided into a barrel, where the use of liquid krypton is envisaged, and two endcaps containing liquid argon. The status of the design is presented

[en] Integrated computer aided engineering and design techniques can be applied to a large variety of problems at the SSC. Two such problems, endcap cryostat designs and the cooling of electronics immersed in liquid argon, are presented in this paper. The cryostat designs were optimized, using sophisticated three dimensional solid modelers, for a minimum of dead material in front of active calorimeter elements. Although the primary design goal was improving calorimeter's energy resolution and minimizing electron conversion int he walls, the optimized designs had to be structurally stable with respect to stress and buckling under gravity, thermal and pressure loads. Different materials were investigated as alternatives to the nominal aluminum structure as an attempt to further reduce the wall thickness. This paper concludes with a discussion of thermal modeling of electronics immersed in LAr and a comparison of a simple experiment with the model predictions

[en] Integrated computer aided engineering and design (CAE/CAD) is having a significant impact on the way design, modeling and analysis is performed, from system concept exploration and definition through final design and integration. Experience with integrated CAE/CAD in high technology projects of scale and scope similar to SSC detectors leads them to propose an integrated computer-based design, modeling and analysis resource aimed specifically at SSC detector system development. The resource architecture emphasizes value-added contact with data and efficient design, modeling and analysis of components, sub-systems or systems with fidelity appropriate to the task. They begin with a general examination of the design, modeling and analysis cycle in high technology projects, emphasizing the transition from the classical islands of automation to the integrated CAE/CAD-based approach. They follow this with a discussion of lessons learned from various attempts to design and implement integrated CAE/CAD systems in scientific and engineering organizations. They then consider the requirements for design, modeling and analysis during SSC detector development, and describe an appropriate resource architecture. They close with a report on the status of the resource and present some results that are indicative of its performance. 10 refs., 7 figs

[en] There is general recognition that engineering issues are critical to the viability of liquid argon calorimetry (LAC) at the Superconducting Super Collider (SSC). The authors have undertaken to quantitatively address these issues and, if possible, perform a preliminary design of a proof of principle LAC for SSC. To establish LAC as viable at SSC, it must be demonstrate that the physics performance of the device is acceptable, despite the presence of dead material due to vessels and support structure. The approach involves the construction, by a team of physicists and engineers, of one three dimensional model of the LAC system, built as a hierarchy of components and structures, from which we directly perform interference checks, mechanical, thermal and magnetic analyses, particle tracking, hermeticity evaluation, physics simulation and assembly. This study, begun in February 1989 as part of the SSC generic detector R ampersand D program, was immediately preceded by a workshop at which engineering details of existing and planned LAC systems (FNAL-DO and E706, SLAC-SLD, HERA-HI and CERN-HELIOS) were thoroughly examined. They describe below the status of their work, beginning with short descriptions of the tools used, the study requirements and LAC configuration baseline. They then detail the LAC design as it presently stands (May 1989), including assembly considerations, and conclude with a quantitative assessment of the LAC hermeticity

[en] The goal of our study is to evaluate the physics performance of a large liquid argon calorimeter for the SSC engineered to include a realistic support system, cryogenic vessels, signals, and services. The physics performance is dependent on the effect of the dead material on the hermeticity. An integrated design, modeling analysis, and simulation approach is used to allow rapid iteration of the three-dimensional model as well as to provide the ability to trace rays through the design. The results show that a liquid argon calorimeter for the SSC can be designed from a mechanical engineering standpoint and that such a device would achieve excellent physics performance. (orig.)