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TECHNIQUE FOR A PET CYCLOTRON TO GENERATE A LOW AND STABLE ACCELERATOR BEAM CURRENT

IP.com Disclosure Number: IPCOM000226962D
Publication Date: 2013-Apr-26
Document File: 3 page(s) / 45K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention proposes a technique for a PET cyclotron to produce a low and stable beam current in a standard ion source. The low and stable beam current is produced below about 1 µA on target. To achieve low and stable beam current on target, as specific ratio of Hydrogen gas and Deuteron gas is maintained, keeping all other ion source parameters same. The invention does not require change in the hardware of cyclotron.

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TECHNIQUE FOR A PET CYCLOTRON TO GENERATE A LOW AND STABLE ACCELERATOR BEAM CURRENT

FIELD OF INVENTION

The invention generally relates to positron emission tomography (PET) cyclotron ion source and more particularly to a method for generating a low and stable beam current.

BACKGROUND OF THE INVENTION

A standard positron emission tomography (PET) cyclotron ion source having conventional operating point produces around 50-200 mA of photon beam on a target site. Due to oscillations of ion source plasma, the ion source is unable to generate a stable beam current at low currents.

 

A conventional technique involves use of a collimator or other shutter to physically reduce the beam. In order to physically reduce beam, movement of the shutter is needed. Such movements need equipment making, the shutter movement technique costly. Moreover, the shutter adds complexity to the system under vacuum and with high voltage on surrounding structures.

Therefore, there is a need in the art for a technique for a cyclotron to generate a low and stable beam current on a target.

BRIEF DESCRIPTION OF THE INVENTION

The present invention proposes a technique for a cyclotron to generate a low and stable beam current in a standard ion source by cyclotron. The low and stable beam current is produced below around 1 µA on target.  The low and stable beam current on target is generated by maintaining specific ratio of hydrogen and Deuteron keeping all other ion source parameters same.

                              DETAILED DESCRIPTION OF THE INVENTION

A technique for cyclotron to generate a low and stable beam current in a standard ion source is disclosed. The low and stable beam current is produced below around 1 µA of current on target. Hydrogen gas is utilized to produce protons f...