Magnetic field simulation in the central region of the VINCY Cyclotron

• Autorzy: Vorojtsov S. , Vorozhtsov A. , Nešković N. , Ristić -Durović J. , Ćirković S. , Vujović V.
• Konferencja: Proceedings of the XXXIII European Cyclotron Progress Meeting, 17-21 September 2002, Warszawa-Kraków, Poland
• Języki publikacji: EN

Abstrakty

EN

The VINCY Cyclotron is under construction at the Vinca Institute of Nuclear Sciences, Laboratory of Physics, Belgrade, Serbia and Montenegro. One of the most difficult problems to solve is the magnetic field shaping in the central region of the machine in a wide range of field levels. The latest measurements showed a very large magnetic field depression in the central region. The following shimming elements are used for the field shaping in the central region: a central plug and a spacer ring between the sectors and the median pole plate. These elements should both release enough vertical space for the inflector and the RF electrodes and produce a field bump in the very center of the machine. Concerning this region, one has to mention the following facts: sectors are absent or very reduced, and the small gap between the sectors restricts remarkably the possibilities of producing a field bump. Therefore, the design of these elements is the most critical one. Optimization of the central plug gap affects both the vertical sparking probability and the beam dynamics at higher harmonic modes. The redesign of the magnetic structure of the central region relied solely on the detailed 3-dimensional calculations to speed up the experimental shimming procedure. The desired calculated magnetic field shapes, which include the influence of the plug, have been produced and confirmed

Słowa kluczowe

EN

cyclotron; central region; magnetic field; plug; beam dynamics

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2003
• Tom: Vol. 48,suppl.2
• Strony: 39--44
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Vorojtsov S.

• Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia, Tel.: [phone], Fax: [phone]

autor

Vorozhtsov A.

• Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia, Tel.: [phone], Fax: [phone]

autor

Nešković N.

• Vinc∨ a Institute of Nuclear Sciences, P.O. Box 522, 11000 Belgrade, Serbia and Montenegro

autor

Ristić -Durović J.

• Vinc∨ a Institute of Nuclear Sciences, P.O. Box 522, 11000 Belgrade, Serbia and Montenegro

autor

Ćirković S.

• Vinc∨ a Institute of Nuclear Sciences, P.O. Box 522, 11000 Belgrade, Serbia and Montenegro

autor

Vujović V.

• Vinc∨ a Institute of Nuclear Sciences, P.O. Box 522, 11000 Belgrade, Serbia and Montenegro

Bibliografia

• 1. Altiparmakov D (1996) Sectors and magnetic plug of the VINCY Cyclotron. In: Proc of the Workshop on the magnetic field and ion beam dynamics of the VINCY cyclotron, 11−15 March 1996, Dubna, Russia, pp 21−48
• 2. Altiparmakov D, Ćirković S (1998) Shimming procedure of the VINCY Cyclotron magnet. In: Proc of the 15th Information Meeting on the TESLA Accelerator Installation, 9−10 July 1998, Belgrade, Yugoslavia, pp 8−20
• 3. Dubrovin AN, Simonov EA, Vorojtsov SB (2001) Mermaid 3D code in ATLAS applications. ATLAS Note ATL-TECH2001-003. CERN, Geneva
• 4. Ivanenko IA (2002) Beam dynamics analysis in the central region of the VINCY Cyclotron for the calculated magnetic field, variant 20. Internal Note. Vinc∨ a Institute of Nuclear Sciences, Belgrade
• 5. Nešković N, Ristić-Ðurović J, Vorojtsov SB et al. (2003) Status report on the VINCY Cyclotron. Nukleonika 48;S2:s135−s139
• 6. Nešković N, Ristić-Ðurović J, Vujović V et al. (1999) VINCY Cyclotron Central Region Magnetic Field. Internal note. Dubna−Belgrade−Novosibirsk
• 7. Ristić-Ðurović J, Vorojtsov S (1998) Foil stripping extraction system of the VINCY Cyclotron. Internal note. Vinc∨ a Institute of Nuclear Sciences, Belgrade
• 8. Vorojtsov S, Ristić-Ðurović J (1998) VINCY Cyclotron Magnetic Field Map Reconstruction. Internal note. JINR−Vinc∨ a Institute of Nuclear Sciences, Dubna−Belgrade
• 9. Vorojtsov SB, Vorozhtsov AS (2002) Calculation of thedynamic properties of the magnetic field of the VINCY Cyclotron. Internal note. JINR, Dubna
• 10. Vorozhtsov SB (1971) Magnetic system of the phasotron with spatial variation of the magnetic field. Communication of the JINR no. 9-5591. JINR, Dubna
• 11. Vorozhtsov SB, Titkova IV, Lomakina OV et al. (1996) 3D Trim coils field in the VINCY Cyclotron. Communication of the JINR no. E-9-96-320. JINR, Dubna