| 摘要 |
The spectrometer includes a vacuum chamber (6), made of a non- magnetic material, and an electromagnet (8), which generates a homogeneous magnetic field inside the chamber. An electron beam (2), generated by an accelerator (4), is transmitted via a sealed tube (16) to the vacuum chamber. The chamber output is coupled to a casing (18) which houses the extremities of two bundles of optical fibres (10,12). A Hall sensor is provided for checking the homogeneity of the magnetic field inside the chamber. When electrons hit the extremities of the optical fibres sparks are generated by Cherenkov effect. The light propagates along the fibres to a slit sweeping camera (14) coupled to the fibres.
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