Uchicago Argonne, LLC

Brookhaven Science Associates, Lcc

Brahim Mustapha

Jerry A Nolen, Jr

Nicholaos Tsoupas

Alexander S Plastun

Alireza Nassiri

Aditya Goel

Peter N Ostroumov

Rainer Meinke

A compact two-dimensional (2D) scanning magnet for scanning ion beams is provided. The compact 2D scanning magnet may include an outer double-helix coil and an inner double-helix coil that is disposed within the outer double-helix coil and is rotated about an axis relative to the outer double-helix coil. The outer double-helix coil may include a first outer coil configured to receive an input electrical current through the first outer coil in a first direction, and a second outer coil configured to receive the input electrical current through the second outer coil in a second direction. The inner double-helix coil may include a first inner coil configured to receive a second input electrical current through the first inner coil in the first direction, and a second inner coil configured to receive the second input electrical current through the second inner coil in the second direction.

Compact 2D scanner magnet with double-helix coils

A compact two-dimensional (2D) scanning magnet for scanning ion beams is provided. The compact 2D scanning magnet may include a vertical field trapezoidal coil and a horizontal field trapezoidal coil that is disposed proximate to the vertical field trapezoidal coil and is rotated about an axis relative to the vertical field trapezoidal coil. The vertical field trapezoidal coil may include a top coil that is configured to receive a first input electrical current flowing in a first direction, and a bottom coil that is configured to receive a second input electrical current flowing in the first direction. The horizontal field trapezoidal coil may include a left coil that is configured to receive a third input electrical current flowing in a second direction, and a right coil that is configured to receive a fourth input electrical current flowing in the second direction.

Compact 2D scanner magnet with trapezoidal coils

The invention provides a method for accelerating protons and carbon ions up to 450 MeV/u in a very compact linac, the method comprising subjecting the particles to a radio frequency quadrupole field to accelerate the particles to at least 3 MeV/u, a drift tube linac (DTL) to an energy of 20 MeV/u, followed by a coupled DTL to 45 MeV/u and finally a high-gradient section made of CCL-type standing wave cavities or negative harmonic traveling wave cavities operating at S-band frequencies and capable of delivering voltage gradients of 40 to 60 MV/m. Focusing the accelerated particles while accelerated to higher energy is provided by appropriately placed constant field permanent magnets and electromagnetic quadrupoles. The compactness and power efficiency of the linac is enabled by using high-gradient structure in the S-band frequencies for lower energy particles than ever before. The low-intensity required for hadron therapy allows the use of small-aperture S-band structures and the operation at very high gradient compared to high-intensity machines for research. Operating with very short sub-microsecond pulses at repetition rates up to 400 Hz allows the fast and flexible beam energy and intensity tuning not provided by existing hadron therapy machines. The designed linac is capable of accelerating ions as heavy as neon to the full 450 MeV/u energy, therefore allowing fast beam switching if different ion sources are installed in the front-end of the linac.

Compac carbon ion LINAC

Growing community of inventors

Naperville, IL, United States of America

Brahim Mustapha