2024-03-28T21:19:38Zhttps://www.tdx.cat/oai/requestoai:www.tdx.cat:10803/17932017-08-31T08:04:03Zcom_10803_1col_10803_65
nam a 5i 4500
Diagnòstic tèrmic
LISA
Ones gravitatòries
Relativitat
Thermal Diagnostics in the LISA Technology Package Experiment
[Barcelona] :
Universitat de Barcelona,
2011
Accés lliure
http://hdl.handle.net/10803/1793
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9788469133811
Nofrarias Serra, Miquel,
autor
Tesi
Doctorat
Universitat de Barcelona. Departament de Física Fonamental
2007
Universitat de Barcelona. Departament de Física Fonamental
Tesis i dissertacions electròniques
Lobo Gutiérrez, José Alberto, ,
1953-
supervisor acadèmic
Verdaguer Oms, Enric, ,
1950-
supervisor acadèmic
TDX
LISA Pathfinder (LPF) is an ESA mission, with NASA contributions, devoted to pave the way to the future spaceborne gravitational wave observatory LISA.<br/>The LISA Technology Package (LTP) experiment in the LPF mission will measure the differential acceleration between two free falling test masses to the picometer resolution by using both masses as end mirrors of an interferometer, together with an active control loop, known as drag-free, that will act to keep the spacecraft centred around the geodesic motion of the masses. The work in this thesis deals with the thermal diagnostic subsystem, intended to measure and characterise the thermal noise contribution to the instrument performance: from the qualification of the high stability electronics designed to measure temperature fluctuations in the millihertz bandwidth to the definition of heaters, aimed to generate controlled perturbations during mission operations. The results obtained characterise the temperature subsystem and define a first step towards a methodology to deal with the thermal data that will be obtained during flight operations.
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