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- Fan, Yi, et al.
(författare)
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A study of fluid coolant with carbon nanotube suspension for MicroChannel coolers
- 2008
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Ingår i: 2008 International Conference on Electronic Packaging Technology and High Density Packaging, ICEPT-HDP 2008; Pudong, Shanghai; China; 28 July 2008 through 31 July 2008. - 9781424427406
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Konferensbidrag (refereegranskat)abstract
- In this work, silicon microchannel coolers were made using the Deep Ion Reactive Etching (DIRE) technique. Stable and homogeneous Carbon NanoTube (CNT) suspension was also prepared. Meanwhile, a closed-loop cooling test system was developed to investigate the heat removal of the silicon microchannel cooler with different coolants. The experimental setup included a test module, a minipump for providing controllable flow, and a fan system for cooling the circular fluid. Beside the inlet and outlet of the test module, two thermocouples and pressure gauges were set up to measure the temperature and pressure of the fluids. The heat removal of the silicon microchannel cooler using different CNT volume fraction of suspension coolant was studied. The results show that the microchannel cooler with CNT suspension as coolant could strengthen the heat removal capability of microchannel cooler. In addition to heat transfer enhancement, the microchannel cooler with CNT suspension coolant did not produce extra pressure drop in the present study.
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- Abate, E., et al.
(författare)
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Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors
- 2008
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Ingår i: Journal of Instrumentation. - 1748-0221. ; 3
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Tidskriftsartikel (refereegranskat)abstract
- The ATLAS (A Toroidal LHC ApparatuS) Inner Detector provides charged particle tracking in the centre of the ATLAS experiment at the Large Hadron Collider (LHC). The Inner Detector consists of three subdetectors: the Pixel Detector, the Semiconductor Tracker (SCT), and the Transition Radiation Tracker (TRT). This paper summarizes the tests that were carried out at the final stage of SCT+TRT integration prior to their installation in ATLAS. The combined operation and performance of the SCT and TRT barrel and endcap detectors was investigated through a series of noise tests, and by recording the tracks of cosmic rays. This was a crucial test of hardware and software of the combined tracker detector systems. The results of noise and cross-talk tests on the SCT and TRT in their final assembled configuration, using final readout and supply hardware and software, are reported. The reconstruction and analysis of the recorded cosmic tracks allowed testing of the offline analysis chain and verification of basic tracker performance parameters, such as efficiency and spatial resolution, in combined operation before installation.
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- Fan, Yi, et al.
(författare)
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Computational Fluid Dynamics for Effects of Coolants on On-chip Cooling Capability with Carbon Nanotube Micro-fin Architectures
- 2009
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Ingår i: Microsystem Technologies. - : Springer Science and Business Media LLC. - 0946-7076 .- 1432-1858. ; 15:3, s. 375-381
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Tidskriftsartikel (refereegranskat)abstract
- Carbon nanotubes (CNTs) have shown a broad promising application in high mechanical strength and electronic structure. In this work, the effects of coolants on heat transfer capability of on-chip cooling with CNTs Micro-fin Architectures was studied, and the two-dimensional computational fluid dynamics (CFD) simulations have been done for a series of material parameters of coolants in this paper. The influences of thermal conductivity, density, specific heat and viscosity on cooling have been obtained in the case studies. The results demonstrate that pressure drop between the inlet and outlet of the cooling device is dependent on coolant's density and viscosity. Consequently, it will be necessary to find out a good balance between heat transfer capability and pressure drop. The simulation results also indicate that the heat sink capability will be better if there are more fin rows in the microchannel.
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