A DOUBLE-FOCUSSING, ALTERNATE-GRADIENT, MAGNETIC SPECTROMETER FOR MOMENTA UP TO 800 Mev/c
Journal Article
·
· Nuclear Instr. & Methods
A 40 deg deflecting magnetic spectrometer has been built for use in experiments with the 1.1 Bev photon beam of the Fiascati electrosynchrotron. It consists of two strongfocusing alternite-gradient pole sectors, the first producing a field index n = +25 and the second n = --20, assembled on a single yoke with no straight section in the middle. The curvature radius being 250 cm, a dispersion results of 0.03/cm, and focusing in both horizontal and vertical planes is obtained at 261 cm from the source position. The deflection is horizontal, and angular distributions can be measured from 0 to 180 deg without allowing the primary beam to strike the magnet. Calibration measurements with a Po/sup 210/ alpha source which extended 5 cm horizontally and 2.5 cm vertically have given 0.0056 steradians as the available solid angle, and have confirmed the position of the conjugate points. (auth)
- Research Organization:
- Laboratori Nazionali del Sincrotrone, Rome
- NSA Number:
- NSA-17-003280
- OSTI ID:
- 4755409
- Journal Information:
- Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 16
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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