O1-500 - Octopole Compact Scanning Magnet for Particle Therapy

Proton TherapyMagnetics
Downloads

The O1-500 octopole magnet is a significant and patented breakthrough in particle therapy technology. It is a high-performance and compact solution designed for pencil beam scanning in gantries or fixed beamlines. Its primary function is to provide efficient beam deflection over a circular field, thereby overcoming space constraints commonly encountered in conventional gantry systems. One of the key features of the octopole magnet is its ability to perform dynamic beam spot shape modification on a spot-by-spot basis. By connecting opposing coil pairs in the multipole magnet separately to bipolar power supplies, it enables a magnet with a dynamically configurable field in its bore. The design allows a deflection direction to be freely chosen, leading to no preferred direction and full deflection availability along any direction at the patient position. This flexibility reduces the need for multiple patient positioner moves.

Optimally designed with a length of 500mm and a bore diameter of 120mm, the octopole magnet provides a balance between dipole field quality and structural complexity. It is tailored for 230MeV protons, capable of providing up to 6 degrees of deflection in any direction. The device's calculated slewing rate surpasses 1400 degrees per second when paired with a 375V power supply. The magnet's unique design ensures low distortion of a circular injected beam, even at full deflection.

In addition to its compact and functional design, the octopole magnet introduces dynamic beam-shaping capabilities. This means that the sinusoidal distribution of coil currents can be adjusted, allowing the beam spot shape to be modified at the same pace it is moved. This feature opens up interesting opportunities for improved conformal dose delivery. Currently, in manufacture for evaluation and use, the octopole magnet's field quality and dynamic performance will be rigorously tested and confirmed to ensure it meets the desired standards.

See our white paper for more information: A Multipole Magnet for Pencil Beam Scanning

Features

  • Compact Design: With a 500mm length and 120mm bore, the octopole magnet is optimally designed to fit within constrained gantry systems.
  • Efficient Beam Deflection: Capable of up to 6 degrees of deflection in any direction, the octopole magnet offers efficient beam deflection over a circular field.
  • High Slewing Rate: The magnet's calculated slewing rate surpasses 1400 degrees per second when utilized with a 375V power supply.
  • Low Beam Distortion: Despite full deflection, the octopole magnet ensures low distortion of a circular injected beam.
  • Dynamic Beam Shaping: The magnet allows for adjustments in the sinusoidal distribution of coil currents, enabling dynamic beam spot shape modification.

Applications

  • Particle Therapy Systems: The octopole magnet can be utilized in gantry systems intended for pencil beam scanning in particle therapy.
  • Linac Vault Systems: The octupoles' ultra-compact length allows it to fit into even the most space-constrained systems.
  • Compact Gantry Systems: Due to its compact design, the octopole magnet is suitable for use in gantry systems where space is at a premium.
  • Conformal Dose Delivery: The dynamic beam shaping capability of the octopole magnet allows for improved conformal dose delivery in radiation therapy.
  • Advanced Beam Shaping: Its unique design enables a dynamically configurable field in its bore, opening up possibilities for novel beam shaping applications.

Protected by Patent US8378312B1

CM100 Render

CM100

Particle Therapy Control Console

MLFC-128 Render

MLFC-128

Multi-Layer Faraday Collector for Particle Energy Measurement

BC-75

BC-75

Faraday Cup Beam Collector for Particle Therapy QA and Diagnostics

IC256-45 Render

IC256-45

256 Strip QC Ion Chamber

T1 and HP1

T1

Industrial Gauss Meter and Magnetic Field Probe with REST API

D2-650-IE

D2-650-IE

High-speed Pencil Beam X/Y Scanning Magnet

Octopole Product Render

O1-500

Octopole Compact Scanning Magnet for Particle Therapy

H20

H20

Dual Magnetic Field Probe System

Related Papers

A Multipole Magnet for Pencil Beam Scanning

A compact, high-speed octopole magnet for improved pencil beam scanning.

2013-06-02