Patent ID: 6693283
Filing Date: 2004-02-17
Classification: A61N,G21K

Abstract:
A scanning System for a heavy ion gantry comprisingtwo scanner magnets (1-2; 3-4) each having: a maximal bending angle (&agr;) of about 1.5 degree a curvature radius of about 22 m; a path length of about 0.6 m; a gap height (h) and a gap width (w) in the range of 120 mm to 150 mm; one glued yoke element made of up to 0.3 mm thick steel plates alloyed with up to 2% silicon having a width in the range of 300 mm to 400 mm and height in the range of 200 mm to 250 mm and a length in the range of 500 to 600 mm; and a coil (5) having a number of windings in the range of 50 to 70 the scanning system (11) further comprises: a 90 degree Dipole (6) positioned downstream of said scanner magnets (1-2; 3-4) having an aperture adapted to the scanning area, and a yoke element with gaps to increase the homogeneity of the electric field, beam diagnostic plate type detectors (7) stapled downstream of said 90 degree bending magnet (6).