Gesellschaft Fuer Schwerionenforschung Mbh

Gsi Helmholtzzentrum Fur Schwerionenforschung Gmbh

Peter Spiller

Thomas Haberer

Hartmut Eickhoff

Marius Pavlovic

The present invention relates to a scanning System for a heavy ion gantry comprising a scanner magnet ( ) for a high energy ion beam used in a heavy ion cancer therapy facility 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 and a gap height (h) and a gap width (w) in the range of 120 mm to 150 mm. Further each scanner magnet ( ) comprises one glued yoke element made of steel plates having a thickness of up to 0.3 mm and being alloyed with up to 2% silicon. This yoke element has a width in the range of 300 mm to 400 mm, a height in the range of 200 mm to 250 mm and a length in the range of 500 to 600 mm. A coil for each scanner magnet ( ) has a number of windings in the range of 50 to 70. Further the system ( ) comprises a 90 degree dipole ( ) positioned downstream of said scanner magnets ( ) having an aperture adapted to the scanning area, and enclosing a yoke element with gaps to increase the homogeneity of the electric field. Additionally the system encloses beam diagnostic plate type detectors ( ) stapled downstream of said 90 degree bending magnet ( ).

Growing community of inventors

Darmstadt, Germany

Peter Spiller