Tuesday, February 14, 2012

1202.2732 (Marc Diaz-Aguiló et al.)

Design of the magnetic diagnostics unit onboard LISA Pathfinder    [PDF]

Marc Diaz-Aguiló, Ignacio Mateos, Juan Ramos-Castro, Alberto Lobo, Enrique García-Berro
LISA (Laser Interferometer Space Antenna) is a joint mission of ESA and NASA
which aims to be the first space-borne gravita- tional wave observatory. Due to
the high complexity and technological challenges that LISA will face, ESA
decided to launch a technological demonstrator, LISA Pathfinder. The payload of
LISA Pathfinder is the so-called LISA Technology Package, and will be the
highest sensitivity geodesic explorer flown to date. The LISA Technology
Package is designed to measure relative accelerations between two test masses
in nominal free fall (geodesic motion). The magnetic, thermal and radiation
disturbances affecting the payload are monitored and dealt by the diagnostics
subsystem. The diagnostics subsystem consists of several modules, and one of
these is the magnetic diagnostics unit. Its main function is the assessment of
differential acceleration noise between test masses due to the magnetic
effects. To do so, it has to determine the magnetic characteristics of the test
masses, namely their magnetic remanences and susceptibilities. In this paper we
show how this can be achieved to the desired accuracy.
View original: http://arxiv.org/abs/1202.2732

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