Speake, Clive

Trenkel-Siebold, Christian

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

Direct measurement of STEP test mass quadrupole moments

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