No abstract

Abslraact. The calculauon of the torque T an a permanent ellipsoidal magnet immersed in a magnetic liquid is more delicate than one might be inclined to expect. This problem, for instance, has a bearing on fundamental discussions carried out in the past about the choice between different formulotioor of electromagnetic theory. The present paper analyses the calculation of T anew. emphasizing the relation to, and the explanation of. the imponmt experiment carded out by Whitwonh and Stopes-Roe in 1971. The outcome of the experiment is explained in r e m of stmdxd magnetastatics. based upon use of the scalar potential ). The relation to the sa-dled KennellySommerfeld eontmveny is commented upon. The physical interpretation of the situation is elucidated by -ing out in deml sn examination of the total energy balance in the special case of spherical mgnet geometry.

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A 64 × 32-element Si monolithic IR-CCD array with the improved PtSi/p-Si Schottky-Barrier (S.B.) detectors has been developed. The improvement of the photoyield was achieved by the structure with no interconnection metal over the detectors and the thinner PtSi film for the S.B. The physical mechanism of the higher photoyield is discussed taking into account the carrier reflection at interfaces (PtSi–Si and PtSi–SiN). The performance of the 64 × 32 IR-CCD was sufficient enough to obtain a thermal image in the 3 to 5 µm atmospheric window range.