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The deuteron tensor analysing power t_{20} of the d(pol) p --> 3He etareaction has been measured at the COSY-ANKE facility in small steps in excessenergy Q up to Q = 11 MeV. Despite the square of the production amplitudevarying by over a factor of five through this range, t_{20} shows little or noenergy dependence. This is evidence that the final state interaction causingthe energy variation is not influenced by the spin configuration in theentrance channel. The weak angular dependence observed for t_{20} providesuseful insight into the amplitude structure near threshold.

Absence of spin dependence in the final state interaction of the d(pol) p --> 3He eta reaction