Simulation of operation modes of isochronous cyclotron by a new interative method

• Autorzy: Taraszkiewicz R. , Talach M. , Sulikowski J. , Doruch H. , Norys T. , Sroka A. , Kiyan I.
• Języki publikacji: EN

Abstrakty

EN

Operation mode simulation methods are based on selection of trim coil currents in the isochronous cyclotron for formation of the required magnetic field at a certain level of the main coil current. The traditional current selection method is based on finding a solution for all trim coils simultaneously. After setting the calculated operation mode, it is usually necessary to perform a control measurement of the magnetic field map and to repeat the calculation for a more accurate solution. The new current selection method is based on successively finding solutions for each particular trim coil. The trim coils are taken one by one in reverse order from the edge to the center of the isochronous cyclotron. The new operation mode simulation method is based on the new current selection method. The new method, as against the traditional one, includes iterative calculation of the kinetic energy at the extraction radius. A series of experiments on proton beam formation within the range of working acceleration radii at extraction energies from 32 to 59 MeV, which were carried out at the AIC144 multipurpose isochronous cyclotron (designed mainly for the eye melanoma treatment and production of radioisotopes) at the INP PAS (Kraków), showed that the new method makes unnecessary any control measurements of magnetic fields for getting the desired operation mode, which indicates a high accuracy of the calculation.

Słowa kluczowe

EN

cyclotron; operation mode; mathematical model

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2007
• Tom: Vol. 52, nr 1
• Strony: 29--34
• Opis fizyczny: Bibliogr. 2 poz., rys.

Twórcy

autor

Taraszkiewicz R.

autor

Talach M.

autor

Sulikowski J.

autor

Doruch H.

autor

Norys T.

autor

Sroka A.

autor

Kiyan I.

• The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, 152 Radzikowskiego Str., 31-342 Kraków, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Gordon MM (1983) Calculation of isochronous fields for sector-focused cyclotrons. Particle Accelerators 13:67−84
• 2. Kiyan IN, Vorojtsov SB, Taraszkiewicz R (2002) The mean magnetic field calculation of the isochronous cyclotron with allowance for flutter program description.Communication of the Joint Institute for Nuclear Research P9-2002-170. JINR, Dubna