Direct measurement of STEP test mass quadrupole moments

Christian Trenkel-Siebold, Clive Speake

Research output: Contribution to journalArticle


A cryogenic torsion balance method is suggested to measure the residual quadrupole moments of the STEP test masses directly. The individual masses are placed on a torsion balance and the torque exerted by a rotating set of source masses is analysed. Conservatively, assuming a torque sensitivity of 10(-13) Nm, it appears that a quadrupole moment of 10(-7) kg m(2) can be detected.
Original languageEnglish
Pages (from-to)5343-5351
Number of pages9
JournalClassical and Quantum Gravity
Issue number24
Early online date30 Oct 2003
Publication statusPublished - 21 Dec 2003


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