Thermal diagnostics front-end electronics for LISA Pathfinder |
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Authors: | Sanjuán J Lobo A Nofrarias M Ramos-Castro J Riu P J |
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Affiliation: | Institut de Ciències de l'Espai (CSIC-IEEC), Edifici Nexus, Gran Capità 2-4, 08034 Barcelona, Spain. |
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Abstract: | Precision temperature measurements are required in the LTP, the LISA technology package, for various diagnostics objectives. In this article, we describe in detail the front-end electronics design and the associated temperature sensors to achieve the LTP requirements: noise equivalent temperature of 10 microK Hz(-12) in the frequency range from 1 to 30 mHz at room temperature. We designed an ac Wheatstone bridge and a subsequent digital demodulation to minimize 1/f noise. We show experimental results where the required sensitivity in the measurement bandwidth is fulfilled. |
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