Proteus C-235 at IFJ PAN

• Presentation

Protons are accelerated up to an of 230 MeV by the Proteus C-235 cylotron. The cyclotron is primarily used for medical purposed but can be applied for secondary applications as well. The cylotron is an isochronous cyclotron with a compact conventional magnet. An energy degrader allows the beam energy to be reduced to 70 MeV.

Protons from the Proteus Cyclotron can feed into 5 rooms: 1 experimental hall, 4 gantry rooms and the eye therapy room.

At the experimental hall the proton beam energy is between 70 MeV and 230 MeV. For energies at 230 MeV the beam current can range between 1nA and 100nA, whereas it can only be up to 2nA for proton energies up to 70MeV. The spot size is about 5.5mm ($1\sigma)$).

Access to this facility can be rather difficult due to the high demand for experiments in nuclear physics.

At the eye therapy room, protons have an energies ranging from 0 to 60 MeV where the energy can only be precisely regulated in the 10 to 60 MeV range. The spot size of the beam can be as large as 40mm (in diameter) with a beam field homogeneity of ~5%. The facility is controlled by the treatment control system. Dedicated devices like: X/Yscanner or 3D scanner, PMMA wheel, water phantom and set of ionization chambers with electrometers are applied for proton beam diagnostic and dosimetry.

Access to this facility can be rather difficult due to the high demand for medical applications.

At the gantry rooms, the proton beam energy is between 70 and 230 MeV. The spot size ranges from 3 to 7 mm in diameter ($1\sigma$). The field size when it is scanning (i.e. moving) is 30cm x 40cm. The field homogeneity is <2%.

Access to this facility can be rather difficult due to the high demand for medical applications.