The Experts below are selected from a list of 966 Experts worldwide ranked by ideXlab platform
Vadim V Silberschmidt - One of the best experts on this subject based on the ideXlab platform.
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numerical analysis of thermo mechanical behavior of indium micro joint at Cryogenic temperatures
Computational Materials Science, 2012Co-Authors: Xiaojin Cheng, Changqing Liu, Vadim V SilberschmidtAbstract:Abstract Microelectronic packaging plays an important role in Cryogenic engineering; in particular, a solder joint as interconnection, which offers a mechanical, thermal and electrical support, undergoes much larger and harsher thermal changes during its Service compared with conventional customer electronic products. The impact of thermo-mechanical properties of such solder joints under Cryogenic Service conditions becomes even more significant due to the continuing miniaturization of solder joints. Indium, a solder material with a low melting point and excellent Cryogenic properties, has been favorable in various low temperature applications, in particular, to form solder joints for electronics interconnections. In order to understand the fundamental aspects of reliability of indium joints, this paper reports a constitutive model accounting for the effect of temperature change on thermo-mechanical behavior of indium joints. Especially, the model is used and subsequently implemented in a FE analysis to simulate a hybrid pixel detector system, in which indium micro-joints are manufactured to serve at Cryogenic conditions. The response of indium joints to low-temperature cycling (300–76 K) was analyzed based on the proposed model, which not only offers a tool to understand the performance and experimental testing of solder joints under Cryogenic temperatures, but can also be used for design optimization of the microelectronic package.
R. B. Bennett - One of the best experts on this subject based on the ideXlab platform.
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A Structural Plastic Foam Thermal Insulation for Cryogenic Service
Advances in Cryogenic Engineering, 1995Co-Authors: R. B. BennettAbstract:Today, with the impending energy crisis and the rush to construct LNG facilities as one method to alleviate the energy shortage, it is not surprising that we find plastic foams and other thermal insulating materials playing a leading and necessary role in Cryogenic applications. Obviously, the cost of thermal insulating materials is a minor part of an LNG contract when compared to the total project cost. However, the proper selection of thermal insulations in their various forms can be a determining factor in the overall success and performance of an LNG facility. Plastic foam insulation can play a significant and vital part in the performance and economics of each LNG installation.
T Strauss - One of the best experts on this subject based on the ideXlab platform.
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design and operation of a setup with a camera and adjustable mirror to inspect the sense wire planes of the time projection chamber inside the microboone cryostat
arXiv: Instrumentation and Detectors, 2015Co-Authors: B Carls, G A Hortonsmith, Catherine C James, Robert M Kubinski, Stephen H Pordes, A Schukraft, T StraussAbstract:Detectors in particle physics, particularly when including Cryogenic components, are often enclosed in vessels that do not provide any physical or visual access to the detectors themselves after installation. However, it can be desirable for experiments to visually investigate the inside of the vessel. The MicroBooNE cryostat hosts a TPC with sense-wire planes, which had to be inspected for damage such as breakage or sagging. This paper describes an approach to view the inside of the MicroBooNE cryostat with a setup of a camera and a mirror through one of its Cryogenic Service nozzles. The paper describes the camera and mirror chosen for the operation, the illumination, and the mechanical structure of the setup. It explains how the system was operated and demonstrates its performance.
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design and operation of a setup with a camera and adjustable mirror to inspect the sense wire planes of the time projection chamber inside the microboone cryostat
Journal of Instrumentation, 2015Co-Authors: B Carls, G A Hortonsmith, Catherine C James, Robert M Kubinski, Stephen H Pordes, A Schukraft, T StraussAbstract:Detectors in particle physics, particularly when including Cryogenic components, are often enclosed in vessels that do not provide any physical or visual access to the detectors themselves after installation. However, it can be desirable for experiments to visually investigate the inside of the vessel. The MicroBooNE cryostat hosts a TPC with sense-wire planes, which had to be inspected for damage such as breakage or sagging. This inspection was performed after the transportation of the vessel with the enclosed detector to its final location, but before filling with liquid argon. This paper describes an approach to view the inside of the MicroBooNE cryostat with a setup of a camera and a mirror through one of its Cryogenic Service nozzles. The paper describes the camera and mirror chosen for the operation, the illumination, and the mechanical structure of the setup. It explains how the system was operated and demonstrates its performance.
Xiaojin Cheng - One of the best experts on this subject based on the ideXlab platform.
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numerical analysis of thermo mechanical behavior of indium micro joint at Cryogenic temperatures
Computational Materials Science, 2012Co-Authors: Xiaojin Cheng, Changqing Liu, Vadim V SilberschmidtAbstract:Abstract Microelectronic packaging plays an important role in Cryogenic engineering; in particular, a solder joint as interconnection, which offers a mechanical, thermal and electrical support, undergoes much larger and harsher thermal changes during its Service compared with conventional customer electronic products. The impact of thermo-mechanical properties of such solder joints under Cryogenic Service conditions becomes even more significant due to the continuing miniaturization of solder joints. Indium, a solder material with a low melting point and excellent Cryogenic properties, has been favorable in various low temperature applications, in particular, to form solder joints for electronics interconnections. In order to understand the fundamental aspects of reliability of indium joints, this paper reports a constitutive model accounting for the effect of temperature change on thermo-mechanical behavior of indium joints. Especially, the model is used and subsequently implemented in a FE analysis to simulate a hybrid pixel detector system, in which indium micro-joints are manufactured to serve at Cryogenic conditions. The response of indium joints to low-temperature cycling (300–76 K) was analyzed based on the proposed model, which not only offers a tool to understand the performance and experimental testing of solder joints under Cryogenic temperatures, but can also be used for design optimization of the microelectronic package.
F Loeffler - One of the best experts on this subject based on the ideXlab platform.
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construction commissioning and Cryogenic performances of the first tesla test facility ttf cryomodule
Advances in cryogenic engineering, 1998Co-Authors: C Pagani, J G Weisend, R Bandelmann, D Barni, A Bosotti, G Grygiel, H Kaiser, U Knopf, R Lange, F LoefflerAbstract:A principal goal of the ongoing TESLA superconducting linac project is the production of affordable cryostats that still meet stringent requirements for alignment, vibration and heat leak. Each cryostat contains 8 superconducting RF cavities cooled to 1.8 K, a quadrupole magnet package cooled to 4.5 K, thermal shields cooled to 70 K and 4.5 K, active and passive magnetic shielding, Cryogenic Service pipes and all associated instrumentation. The axes of the 8 cavities must be aligned to the ideal beam axis to within ± 0.5 mm and those of the quadrupoles to within ± 0.1 mm. Additionally, the vertical mid plane of the quadrupole package must be aligned to the vertical direction to ± 0.1 mrad. These alignments must remain fixed after cool down and during operation. The cryostat must be designed so that there are no resonant vibration modes near the 10 Hz operating frequency of the accelerator. Although dynamic loads associated with the operation of the RF and the beam dominate the heat load, reasonable efforts to reduce the static heat leak into the cryostat are necessary.