Specification for pair spectrometer and target

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The following paragraphs refer to the pair spectrometer in Hall B (Primex spectrometer). The 1.5Tm magnet is on loan from BNL, suitable for deflecting electron-positron pairs produced in a thin converter in front of the magnet. A harp is used to allow for converter foils of 10-3, 10-2, 0.1 X0.