On the Dilution Refrigerator Thermal Connection for the SCHENBERG Gravitational Wave Detector
| العنوان: | On the Dilution Refrigerator Thermal Connection for the SCHENBERG Gravitational Wave Detector |
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| المؤلفون: | Nadja S. Magalhães, Carlos Frajuca, F. S. Bortoli, Wilson Carlos da Silva Junior, Sergio Turano de Souza |
| المصدر: | Brazilian Journal of Physics. 50:541-547 |
| بيانات النشر: | Springer Science and Business Media LLC, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, Gravitational-wave observatory, 010308 nuclear & particles physics, Gravitational wave, Acoustics, Attenuation, Detector, General Physics and Astronomy, 01 natural sciences, Vibration, Transducer, 0103 physical sciences, Dilution refrigerator, Center frequency, 010306 general physics |
| الوصف: | The resonant-mass gravitational wave detector SCHENBERG was designed by the Brazilian group Graviton to be sensitive to a central frequency nearing 3200 Hz and a bandwidth of 200 Hz. It has a spherical antenna weighing 1150 kg that is connected to the outer environment by a suspension system designed to attenuate local noise due to seism as well as other sources. Should a gravitational wave pass by the detector, the antenna is expected to vibrate. This motion will be monitored by six parametric transducers whose output signals will be digitally analyzed. In order to improve the sensitivity of the detector, it must be cooled down to the lowest possible temperature, and for this purpose a dilution refrigerator is planned to be implemented in the detector. It is known that such device produces vibration when operational, consequently introducing noise in the system. Using the finite elements method, this work investigates thermal connections between the dilution refrigerator and the sphere suspension that allow the detector to operate within its projected sensitivity. The finite elements method showed an attenuation of 240dB in the best-valued thermal connection. |
| تدمد: | 1678-4448 0103-9733 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::f695320dab7ca95b40227a98891916bb https://doi.org/10.1007/s13538-020-00778-3 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi...........f695320dab7ca95b40227a98891916bb |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 16784448 01039733 |
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