Status and progress of the Nuclotron -M project MAC meeting 20 May 200 9 G.V. Trubnikov

1. Status and progress of the Nuclotron-M project MAC meeting 20May 2009 G.V. Trubnikov for Accelerator Division

2. 1 stage: Nuclotron-M Leaders: A.D. Kovalenko, G.V. Trubnikov Deputy leaders: V.I. Volkov Institute theme 02-00-1065-2007/2009 The goal – to reach by2010Nuclotron parameters necessary for the NICA complex: accelerated heavy ions A~200, beam intensity ~109 A/cycle (0.2-0.4 Hz) at energy ~ 3.5 GeV/u for U92+ • The resolution of the section of Basic Facilities of JINR STC and TC from 18.12.2007: • «We propose the criteria of the project completion is the following: acceleration and • extraction of ion beam with А~100 (for example Хе) at the energy about 5 GeV/u and • intensity 107p/sec…» • Development of new injection complex • Modernization of RF system • Upgrade of diagnostics and beam control systems • Modernization of the vacuum system • Modernization of the electric- and cryo- supply systems • Development of the minimum required infrastructure

3. Approved staged development plan for realization http://nucloserv.jinr.ru/nica_webpage/Nica_files/plan/PLANS/Plans.html Всего ~ 150 позиций…

4. Heavy Ion Sources KRION-2, KRION-6Т (team of E.Donets) • It was performed 4 runs (one month each) in 2008 on the existing ion source KRION-2 (solenoid field 3T) with the following results: • Developed, manufactured and experimentally tested new electron gun with increased cathode diameter (1.2mm); automatic system for regulation of the emitter current during one electron pulse; diagnostic system for the string dynamics formation and ion trapping; new scheme of the cell for ion (the following gases: CН4, N2, O2и Ar) pulsed injection into the electron string for ion-ion cooling; new electron beam external modulator at 8 keV; • It was provided series of experiments aimed to get highly-charged Xe ions at the continuous Xe-gas injection into electron string. Ions of Xe36+ at electron energy Einj=3.7kV were obtained. It was found out that continuous injection of Xe gas follows to the instabilities and cathode poisoning. It was realized that pulsed injection of the Xe for the experiments is required and it is planned to use new tested cell (above mentioned), but unfortunately it will be impossible to use ion cooling. • It is planned to perform 4 experimental runs at the existing KRION-2 in 2009 in order to prepare KRION-2 for operation in the Nuclotron run (autumn 2009) with ions Xe44+ (A=129, Z/A=0,341). – 2 already done, 3rd – will start end of May • Progress with new ion source KRION-6T in 2008: • All calculations and modeling works for the magnetic system and electron optics were successfully performed; prototypes of the electron gun and electron reflector for KRION-6T were designed, constructed and successfully tested at KRION-2; prototype of the external modulator aimed to operate at 16-18 kV was constructed and successfully tested at 9 kV. • Designed and manufactured elements of the electron drift tube and ion trap for the structure at 4,2K • Designed and manufactured all main elements of the automatic spooling machine tool for manufacture of superconducting solenoid coil, special software for the spooling process was created. • Designed, manufactured and tested all elements of the vacuum vessel for KRION-6T (the most important and difficult – complex vacuum flanges). Vacuum system of the source is assembled and ready for the vacuum tests. Developed and constructed non-oil vacuum pumping system for the KRION-6T, all necessary elements are purchased and manufactured.

5. Assembled vacuum system and cryogenic vessel of the new source KRION-6T; New automatic machine tool for solenoid coil spooling.

6. Injector (LU-20) modernization • It is planned in 2009: • dismounting of the linac vessel and geodethy of all 59 drift tubes; • new power supplies for correctors; - done ! • commissioning of the operational variant of the new synchronization system for all linac control channels; - done ! • exchange of some vacuum chamber parts of the injection channel (new fast vacuum shutters); - done ! • 2-3 dedicated runs at LU-20 – 1 had been done!

7. Nuclotron vacuum system modernization (Dr. H.Hodjibagiyan) 2 stages are planned in the frames of Nuclotron-M project: 1st - necessary modernization for Nuclotron readyness, 2nd stage - modernization for NICA;

8. We assume that 1st stage of the Nuclotron vacuum system modernization is completed in the sense of equipment installation (2 orders of magnitude improvement). The realization of the 2nd stage has been started and now the main works are concentrated in development of the automatic control system for the Nuclotron vacuum equipment for: - remote switching ON/OFF and control by all vacuum equipment; - measurement, delivery of information and visualization of the vacuum system parameters; - equipment protection during emergencies. These works had been performed in close collaboration with Czech companies (Vacuum Praha, FOTON) using modern electronic component. Works were started from design stage in July’08 and had been completed in April’09 by commissioning of the system, budget of works is about 100k$ - done! Some modernization of the vacuum chamber parts had been performed. The new pick-up station in the cryostat assembly is under completion – the design was started in July’08, LHEP workshops manufactured all elements and assembled pick-up station. Now we are starting the process of pick-up and fast shutters cryogenic measurements and after end of tests those assemblies will be installed in the cryo-and RF-test-bench. – almost done! The kit of 8 ionic pumps installed at Nuclotron in 1990-s were dismounted and transferred in December’08 to Czech company Vacuum Praha for full modernization – done, on the way back to Dubna.

10. Модернизация вакуумной системы (второй этап) – 8 апреля 2009г.

11. RF system modernization (O.Brovko) • The following scope of works was performed since end of 2008: • Completed all hardware works on the reconstruction of cable lines for the measurement of beam orbit. Software will be ready by the beginning of the next run - ready in the middle of February’09; • 3 existing pick-up stations (#2, 11 and 16) were totally revised and experimentally tested at room and He temperatures and now are ready for the run at machine; • special shielding for the 2nd RF station (RFS#4) and plugs of HV cables to this station were manufactured and installed in a tunnel. This allows to decrease noise from RF on the beam signal by factor of 10-15; • Works on the creation of new control system of RF and B (magnetic field) synchronization with new digital synthesizer and accuracy of 0,01 Gauss are in the final stage and its prototype will be tested in the coming run.

12. Beam slow extraction system at maximum energy (V.I.Volkov) Works on design of new high voltage power supply for the electro-static septum in the LHEP design bureau were completed in autumn 2008, before simulation and modeling works were performed. Prototype of such system was constructed and successfully tested up to 190 kV (existing septum power supply allows to increase voltage up to 110 kV – it corresponds to 2,3 GeV/n extracted beam). Now all the elements of new power supply had been manufactured at LHEP workshops and this system is under assembly. We plan to install it to the slow extraction sector during the coming run in order to provide experiments on beam extraction at energy 4 GeV/n.

13. Old one (existing in the tunnel) New one (final tests before run)

14. Modernization of the automation system for control, beam diagnostics and monitoring of parameters of the accelerator complex.(V.Volkov) • - New Control System for the Main Magnet Power Supplies - Contract with Slovakia; • - New diagnostics commissioning; • Full modernization of the inflector system (beam injection) with reserve kit of it for • non-stop operation; • - New kit of beam-bump power supplies commissioning; • - Full scale renewal of the Nuclotron server - Contract with Romania (50k$) - installing • Commissioning of new power supply for beam orbit correctors, commissioning of 24 • supplies in Autumn 2009, commissioning of 24 units more in the middle of 2010- • large Contract with Slovakian Institutes (175 kEuro for 2 years); • - R&D works on design, construction and installation of new elliptical pick-ups – R&D • - continuation of the beam orbit measurement and correction (with Bulgaria, Slovakia).

15. New Magnet Power Control System (MPCS) assembled. Final tests Glassman power supplies kit for beam bump in the b.1

16. Improvement of the power supplies, shielding and energy evacuation systems of the lattice magnets and lenses(V.Karpinsky) Run 39: Very important stage –increase of the magnetic field in magnets and lenses from 0.9 up to 1.4-1.5T using special prototype of the energy evacuation system Next stage – field increase from 1.4 up to 1.9 - 2T in the end of 2009 (using exploitation EES) Transfer point at b.1B A lot of other works: - Successfully designed, developed and tested prototype of the power supply for current increment in the F-lenses - done - new system for magnet field control - done - beam-bump power supply - done - electric shield of the compressor cascade - done - modernization of main power supply 19TV and 20 TV (6kA, 300V) – in progress - .... ESS kits (may 2008)

17. New power scheme

18. Team of creators (December 2008). EES at b.1А New commutation schemes

19. Improvement of the cryogenic supply system (prof. N.Agapov, V.Batin) Completed Contract with KRIOGENMASH plant aimed on the total modernization of the oil-cleaner unit for liquid Helium at KGU-1600 plant - complicated 13-tonn system with cryogenic and high-pressure ingredients. The budget of works is 110k$and this work was successfully completed during July-December 2008

21. Improvement of the cryogenic supply system (prof. N.Agapov, V.Batin) Very large scope of works in collaboration with HELIIMASH Company and is referred to the full scale modernization of other elements and units of the LHEP He-liquefier complex: large volume of welding and mechanical works, dismounting and reconstruction of 12 grease (oil) separators and absorbers, re-filling those blocks with new adsorbent powder, flushing and refining all those vessels, training and testing of these vessels, refining of all He pipelines with special modern technology using Freon gas. The total budget of these works is about 400k$.They were started in August 2008, end – May 2009.

22. “Wet” turboexpander (frequency 300000 turns/min) - 6 unitswerefixedbynow

23. Personnelof JINR and HELIIMASH during dismountigworksat KGU-1600

24. Extracted beam transport channels and their radiation shielding (P.Rukoyatkin, A.Alfeev, A.Kochurov) • - Extracted beam profilometers (first half of extraction channel) were re-designed and reconstructed; • diagnostic system for the extracted beam intensity measurement was revised and reconstructed; • - Large volume of work was performed in the field of control and measurement of the coil current in • magnets and lenses of beam transportation channel. Before we had only tools for manual • measurement of magnet parameters. • - By February 2009 the new automatic system (industrial PC, 32-channel block, active filter • modules, cable lines, complex software) for measurement and control of coil current will be • commissioned and used by operation personnel (accelerator and experimental physicists) • during the run. It will help to have detailed information about unstable work of magnetic optic • elements. • 32 neutron detectors in experimental halls (1 and 205) were totally graduated and metrological • attestation was performed for all them

25. Development and creation of a high-intensity polarized deuteron source (V.Fimushkin) We continue collaboration works with INR (Troitsk) on the development of the new high-intensity polarized deuteron source, and signed an addendum for work prolongation in 2009. We plan to complete TDR documentation in this year and start construction of some elements at INR. Simulation, modeling and design of different elements of the future source is in active phase at LHEP. Experimental hall for the future test bench with that source is prepared at LHEP building 203A, preparation electrical and water-cooling works were performed. It is purchased part of necessary vacuum equipment (turbomolecular pumps) for the SPD realization in 2009 – delivery in August 2009

26. We continue geodetical measurements in the Nuclotron tunnel (which we started 1 year ago) in order to monitor alignment of the ring optic elements. - Large scope of infrastructure (fixing and construction works) was performed since June 2008 - Water cooling and energetic systems are under modernization (collaboration with Bulgaria on automatization of water systems, reconstruction of power station, etc) Total budget is about 150 k$

27. New water pump (self-filtering) system – installed in autumn 2009. Successfully tested and commissioned in April 2009.

28. Run № 39 • Start - Spring 2009 (300-400 hours) (actually it was started – run with beam at LU-20, full-scale CHP (cryogenic) test. Circulating beam is expecting. • Main task - successful technological commission and launch of complex system after large-scale reconstruction • Program: • Preparation, tuning, tests ~ 200 hours. • Physics shifts ~ 100-200 hours. • Deutrons

29. Run № 40 • Start: Nov 2009 (400-900 hours). • Main accelerator task – achievement of project field (1.8-1.9 T), generation and acceleration of heavy ions with maximal possible (!) intensity, probably beam extraction with possible efficiency. • Program: • Preparation, methodical shifts ~ 200-300 hours; • Physics experiments ~ 200-700 hours; • Particles - Xe, deutrons

30. Key moments and expected results on the current stage of the project It is planned to provide the next run at Nuclotron in Spring 2009 when all reconstructed systems will be installed in accordance with technological requirements. Main goal for the run is commissioningof developed and installed systems – stable operation of Nuclotron complex with new Control System for the Main Magnet Power Supplies (MPSC); machine operation will be tested with new evacuation system at magnetic field 1.4-1.5T; very important is to perform full-scale tests of the reconstructed cryogenic system. Accelerator and methodical shifts will have the first priority, run duration will depend on the dates of start. It is planned also to commission new diagnostics (automatic measurement of the beam orbit, new pick-up station) – this is perspective task and it has to be actively developed in parallel with modernization of technological systems. If some hours will be given for physicists – it is planned to have accelerate deuteron beams.

31. Сообщения ОИЯИ, Р9-2009-38 «Ход реализации проекта Нуклотрон-М (по итогам сеансов 37, 38)» Объединенный институт ядерных исследований, Дубна: Агапов Н.Н., Алфеев А.В., Андреев В.А., Базанов А.М., Батин В.И., Блинов Н.А., Бровко О.И., Бутенко А.В., Василишин Б.В., Волков В.И., Говоров А.И, Донец Е.Д., Донец Е.Е., Донец Д.Е., Елисеев А.В., Иванов Е.В., Иссинский И.Б., Карпинский В.Н., Кекелидзе В.Д., Кириченко А.Е., Коваленко А.Д., Козлов О.С., Мешков И.Н., Михайлов В.А., Мончинский В.А., Никитаев П.И., Осипенков А.Л., Романов С.В., Рукояткин П.А., Сальников В.В., Селезнев В.В., Семин Н.В., Сидорин А.О., Сисакян А.Н., Слепнев В.М., Смирнова З.И., Сорин А.С., Трубников Г.В., Фатеев А.А., Фимушкин В.В., Ходжибагиян Г.Г., Царенков А.П., Шабунов А.В, Шутов В.Б. Институт ядерных исследований и ядерной энергетики БАН, София, Болгария: Ангелов А., Ангелов В., Гешков И., Динев Д., Цаков И., Стаменов Й., INOE 2000, Бухарест, Румыния: Савастру Д., Сорин М. Институт Проблем Измерений САН, Братислава, Словакия: Ондриш Л., Карлов Университет, Чехия: Фингер М. Руководители проекта: Г.В.Трубников, А.Д.Коваленко Заместитель руководителя проекта: В.И.Волков

33. Thank you for your attention