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| Content Provider | Springer Nature Link |
|---|---|
| Author | Hallewell, G. Hoffmann, D. Vacek, Václav |
| Copyright Year | 2007 |
| Abstract | An evaporative cooling system developed for operation and qualification testing of silicon pixel and microstrip detectors for the inner tracking detector of the CERN ATLAS spectrometer is described. Silicon detector substrates must be continuously operated between 0 and − 7°C in the high radiation environment near the circulating beams at the CERN Large Hadron Collider (LHC). This requirement imposes unusual constraints on the cooling system and has led to the choice of perfluoro-n-propane (C$_{3}$F$_{8}$) refrigerant, which combines good chemical stability under ionizing radiation with high dielectric strength and nonflammability. Since the silicon detectors must also be of extremely light construction to minimize undesirable physics background, coolant tubes are of thin (200 μm) aluminum wall, while evaporative operation allows a very low circulating coolant mass-flow (1–3 g · s$^{−1}$/100W to evacuate). The assembled detector arrays will undergo qualification tests at room temperature before installation in the ATLAS spectrometer. The cooling system is “dual-fuel,” and can also be operated with perfluoro-n-butane (C$_{4}$F$_{10}$) refrigerant, offering a reduced evaporation pressure (1.9 bar) compared to that of C$_{3}$F$_{8}$ (6.5 bar at 15°C). |
| Starting Page | 1730 |
| Ending Page | 1740 |
| Page Count | 11 |
| File Format | |
| ISSN | 0195928X |
| Journal | International Journal of Thermophysics |
| Volume Number | 28 |
| Issue Number | 5 |
| e-ISSN | 15729567 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2007-10-16 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | ATLAS detector Cooling circuit Experimental results Flow control system Fluoroinert refrigerant Inner detector structures Physical Chemistry Industrial Chemistry/Chemical Engineering Mechanics Condensed Matter |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics |
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