US 6,873,123 B2 · Device and method for regulating intensity of beam extracted from a particle accelerator

Abstract

The invention concerns a device (10) for regulating the intensity of a beam extracted from a particle accelerator, such as a cyclotron, used for example for protontherapy, said particles being generated from an ion source. The invention is characterized in that it comprises at least: a comparator (90) determining a difference ε between a digital signal IR representing the intensity of the beam measured at the output of the accelerator and a setpoint value IC of the beam intensity: a Smith predictor (80) which determines on the basis of the difference ε, a correct value of the intensity of the beam IP; an inverted correspondence table (40) supplying, on the basis of the corrected value of the intensity of the beam IP, a setpoint value IA for supply arc current from the ion source (20).

Claims13

Dependent claims

A device (10) for regulating the intensity of the beam extracted from a particle accelerator, such as a cyclotron, used for example for proton therapy, said particles being generated from an ion source, characterized in that it includes at least:

a comparator (90), which determines a difference ε between a digital signal IR representative of the beam intensity measured at the output of the accelerator and a setpoint value of the beam intensity IC;
a Smith predictor (80), which determines a corrected value of the beam intensity IP on the basis of the difference ε;
an inverted correspondence table (40), which provides a setpoint value IA for the supply of the arc current of the ion source (20) on the basis of the corrected value of the beam intensity IP.

A method for regulating the intensity of the beam extracted from a particle accelerator, such as a cyclotron, used for example for proton therapy, said particles being generated from an ion source (20), by means of a digital regulation device (10) operating at a given sampling frequency, characterized in that it comprises at least the following stages:

the beam intensity (IM) is measured at the output of the particle accelerator;
a digital signal IR representative of the measurement of the beam intensity (IM) is compared with the setpoint value IC of the beam intensity, by means of a comparator (90);
a corrected value of the beam intensity IP is determined by means of a Smith predictor (80);
a setpoint value IA for the supply of the arc current of the ion source (20) is determined, on the basis of the corrected value IP of the beam intensity, by means of an inverted correspondence table (40).

1 more element

Dependencies are inferred from the claim text.

Device and method for regulating intensity of beam extracted from a particle accelerator

Life of this patent

Device and method for regulating intensity of beam extracted from a particle accelerator

Life of this patent

Abstract

Claims13