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Ion beam scanner system and operating method

  • US 6,891,177 B1
  • Filed: 02/11/2000
  • Issued: 05/10/2005
  • Est. Priority Date: 02/19/1999
  • Status: Expired due to Fees
First Claim
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1. An ion beam scanning system having an ion source device, an ion accelerator system that can be set to an acceleration of ions required to obtain a maximum depth of penetration, and an ion beam guidance system (1) comprising an ion beam outlet window (2) for a converging centred ion beam (3), and a mechanical alignment system (4) for a target volume (5) to be scanned,wherein the scanning system (6) comprises energy absorption means (7) that are arranged in the path of the ion beam between the target volume (5) and the ion beam outlet window (2) transverse to the centre of the ion beam and comprises absorber wedges (13) that can be displaced transverse to the centre of the ion beam, a high-performance linear motor (8) for rapid driving of the absorber wedges (13) and beam-intensity-controlled depth-scanning with transverse displacement of the energy absorption means (7), so that depth-staggered scanning of volume elements (9) of a tumour tissue (11) can be carried out in rapid succession, and an ionisation chamber (16) for measuring beam intensity, which is arranged upstream of the energy absorption means (7).

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