• E. Syresin, D.E. Donets, E.D. Donets, E.E. Donets, V.M. Drobin, V.B. Shutov
  JINR, Dubna, Moscow Region
• A.E. Dubinov, R.M. Garipov, I.V. Makarov
  VNIIEF, Sarov (Nizhnii Gorod)
• A.V. Shabunov
  JINR/LHE, Moscow

The Electron String Ion Source (ESIS) developed at JINR is effectively used here during the last decade. The Tubular Electron String Ion Source (TESIS) has been put forward recently to obtain a 1-2 orders of magnitude increase in the ion output as compared with ESIS. The project is aimed at creating TESIS and studying the electron string in the tubular geometry. The new tubular source with a superconducting solenoid up to 5 T is under construction now. The method of the off axis TESIS ion extraction will be realized to get TESIS beam emittance comparable with ESIS emittance. It is expected that this new TESIS will meet all rigid conceptual and technological requirements and should provide an ion output approaching 10 mA of Ar¹⁶⁺ ions in the pulsed mode and about 10 μA of Ar¹⁶⁺ ions in the average current mode. Design, construction and test of separate TESIS systems are discussed in this report.