Beam scanning system for a heavy ion gantry
First Claim
1. A scanning System for a heavy ion gantry comprisingtwo scanner magnets (1-2;
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3-4) each having;
a maximal bending angle (α
) 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).
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Accused Products
Abstract
The present invention relates to a scanning System for a heavy ion gantry comprising a scanner magnet (1-2; 3-4) for a high energy ion beam used in a heavy ion cancer therapy facility having a maximal bending angle (α) 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 (1-2, 3-4) 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 (1-2; 3-4) has a number of windings in the range of 50 to 70. Further the system (11) 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 enclosing a yoke element with gaps to increase the homogeneity of the electric field. Additionally the system encloses beam diagnostic plate type detectors (7) stapled downstream of said 90 degree bending magnet (6).
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Citations
9 Claims
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1. A scanning System for a heavy ion gantry comprising
two scanner magnets (1-2; -
3-4) each having;
a maximal bending angle (α
) of about 1.5 degreea 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). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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3-4) each having;
Specification
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- Resources
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Current AssigneeGessellschaft Fur Schwerionenforschung MbH
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Original AssigneeGessellschaft Fur Schwerionenforschung MbH
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InventorsSpiller, Peter, Haberer, Thomas, Eickhoff, Hartmut, Pavlovic, Marius
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Primary Examiner(s)Berman, Jack
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Application NumberUS10/240,518Publication NumberTime in Patent Office307 DaysField of Search250/492.3, 250/398, 250/396.MLUS Class Current250/396.0MLCPC Class CodesA61N 2005/1087 Ions; ProtonsA61N 5/1043 Scanning the radiation beam...G21K 5/04 with beam-forming means
