title: Thermal diagnostics front-end electronics for LISA Pathfinder.
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.
authors.affiliation: Institut de Ciències de l'Espai (CSIC-IEEC), Edifici Nexus, Gran Capità 2-4, 08034 Barcelona, Spain.
authors.forename: J
authors.initials: J
authors.lastname: Sanjuán
authors.forename: A
authors.initials: A
authors.lastname: Lobo
authors.forename: M
authors.initials: M
authors.lastname: Nofrarias
authors.forename: J
authors.initials: J
authors.lastname: Ramos-Castro
authors.forename: P J
authors.initials: PJ
authors.lastname: Riu
mesh_terms: D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013026:Space Flight / Q000295:instrumentation*; D013696:Temperature; D013817:Thermography / Q000295:instrumentation*