STATUS REPORT OF THE U400 CYCLOTRON AT THE FLNR JINR

The isochronous U400 cyclotron has been constructed and put into operation since 1978. The cyclotron produces ion beams of atomic masses from 4 to 209 at maximum energy up to 26 MeV/nucleon. Since 1996, the U400 axial injection system with the ECR4M ion source has been constructed and put into operation. To increase output intensity, the double buncher system (Sine and Line types) was installed in the injection channel in 1997-1998. Since 1998, the annual operation of the U400 has been more than 4800 hours. The main time was spent to accelerate 48Ca 5+ ions for the purpose of synthesis the new super heavy elements. The modernization of the axial injection system was done in 2002 with the aim of further increasing the U400 output intensity. To extract the accelerated ions from the U400, the stripping foils method is used. At present time, the average intensity of 48Ca 18+