The wedge geometry closed by a circular-cylindrical arc is a nontrivialgeneralization of the cylinder, which may have various applications. If theradial boundaries are not perfect conductors, the angular eigenvalues are onlyimplicitly determined. When the speed of light is the same on both sides of thewedge, the Casimir energy is finite, unlike the case of a perfect conductor,where there is a divergence associated with the corners where the radial planesmeet the circular arc. We advance the study of this system by reporting resultson the temperature dependence for the conducting situation. We also discuss theappropriate choice of the electromagnetic energy-momentum tensor.
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