1. “NUCLOTRON-M” - кеу element of NIKA A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

2. “NUCLOTRON-M” A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

3. УСКОРИТЕЛЬНЫЙ КОМПЛЕКС 3- ХРАНИЛИЩЕ ГАЗООБРАЗНОГО ГЕЛИЯ: V =5000 m3; 4 – ГАЗГОЛЬДЕРЫ; 5 – ГЕЛИЕВЫЕ КОМПРЕССОРЫ; 6 – РЕФРИЖЕРАТОРЫ КГУ: 3x1600 W @ T =4.5 K; 7 – СТАНЦИЯ НАПОЛНЕНИЯ СОСУДОВ ЖИДКИМ ГЕЛИЕМ A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

4. “NUCLOTRON-M” - Development of heavy ion source KRION; Modernization of the power supplies and the Nuclotron stored energy damp system; Upgrade of the accelerator ring vacuum system; Development of the existing RF system; Beam extraction system upgrade; Development of beam diagnostic and the accelerator control system; Beam transfer lines and radiation shield; Cryogenic system development; Beam dynamics study and minimization of the particle losses at all the stages of accelerator cycle; Design and construction works on heavy ion pre-accelerator chain with injection and extraction beam transfer lines; Development of superconducting fast-cycling and fast-ramped magnets; Basic milestones, work schedule, requested resourses A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

5. Expected main results after completion: 1.Extension of the accelerated heavy ion beams up to A ~ 200 (with the new heavy ion source and pre-accelerator chain). 2.Improvement of vacuum level in the Nuclotron ring up to 10 –10 Torr. 3.Stable long operation of the main Nuclotron dipoles at B = 2.1 T. 4.Upgrade of the beam diagnostic and the accelerator control systems. 5. High efficiency of the beam slow extraction and beam transfer line operation at the maximum specified heavy ion energy. 6. Minimization of the overall particle losses in the Nuclotron to 10-15% per cycle. 7. Reduced consumption of liquid nitrogen by a factor of 2-3 8. Construction and test of superconducting fast-ramped 4-6 T magnets. “NUCLOTRON-M” A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

6. Development of heavy ion source KRION “NUCLOTRON-M” Construction of the new ion source with 6 T solenoid within the coming two years is the main goal of the project. General view of the ion source and basic operation scheme. The total stored electron charge and electron current density are determined, in particular, by the peak magnetic field of superconducting solenoid. This value is limited to 3 T for the existing one. The fist Au32+ ion beams have been obtained in October. Ionization time was 100 ms. The total intensity was of 1.2*10 9 ions/pulse. The new important feature of the source is capability of operation at high pulse repetition rate in the case of production heavy ions at intermediate charged states, was considered. U 30+ intensity of (4-8)10 10 ions/sec is reached in the case of the pulse repetition rate of 5-10 Hz. A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

8. Basic goal: Provide stable, safe and long operation of the Nuclotron magnetic system at B = 2.1 T Modernization of the power supplies and the Nuclotron stored energy damp system; “NUCLOTRON-M” The new improved unit for energy damp from the magnets in the case of quench (so-called “thyristor switch”) was designed, constructed and tested. It is necessary to produce and put into operation seven such units for both the dipoles and the quadrupoles power supply circuits. Scheme of the Nuclotron structural magnets power supply (thyristor switches marked with yellow) A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

9. “NUCLOTRON-M” The averaged presure in the beam pipe is estimated to about p ≤ 5,0 ∙ 10 -8 Torr (nitrogen equivalent at 300 K) due to the above mentioned and some other reasons. At the present time there is no any possibility to pump out gaseous He defusing into the beam pipe through non-hermetic connection near the beam extraction pipe inside the cryostat volume It is planned to install 20 turbo-molecular pumps The new pumps will be connected to the existing beam pipe outputs instead of The expected result: p ≤ 1,0 ∙ 10е-10 Torr ( Не @ 10 К) “NUCLOTRON-M” Modernization of the Nuclotron vacuum system; A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

10. “NUCLOTRON-M” A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna “NUCLOTRON-M” Beam dynamics study and minimization of the particle losses at all the stages of accelerator cycle The losses can be reduced by a factor of 5-6 due to improvement of RF capture scheme and careful beam dynamics study at the time interval of 100-200 mks after injection Beam-time of 800 hours is requested in 2007-09 for the studies

11. The most reasonable is design and construction of separate injection chain to the Nuclotron, which will be adequate to all specified conditions for pre-acceleration and transportation of the heaviest ions. The existing complex will be used for protons, deuterons, polarized deuterons and light ions (Z/A > 0.4). “NUCLOTRON-M” Design and construction works on heavy ion pre-accelerator chain with injection and extraction beam transfer lines; The new heavy ion injector will include: new KRION (6T ), pre-accelerators and booster synchrotron. Detailed design and optimization is in progress. The funds are requested for: 1). R&D works on the systems, 2) preparatory works for the new equipment installation; 3) the model magnets manufacturing and tests. A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

12. Fast-ramped 4-6 T dipoles Superconducting (4-6) T dipoles based on a coil made of hollow Nuclotron-type cable can provide operation of the magnet at the magnetic field ramp up to (2-3) T/s. Their main advantages are 1) much higher cooling efficiency of the superconductor and 2) much less inductance of the magnet winding in comparison with traditional dipole based on classical Rutherford cable. R&D work on the magnets is very important for the proposed Nuclotron-based heavy ion collider facility ( NICA) “NUCLOTRON-M” A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna

13. “NUCLOTRON-M” A.D.Kovalenko.VHM Workshop, September 19, 2007, Dubna