collider

Paper	Title	Other Keywords	Page
MOIO02	NICA Project at JINR	ion, luminosity, proton, emittance	6
	I. N. Meshkov JINR, Dubna, Moscow Region
	Status of the project of Nuclotron-based Ion Collider fAcility NICA/MPD (MultiPurpose Detector) under development at JINR (Dubna) is presented. The general goals of the project are providing of colliding beams for experimental studies of both hot and dense strongly interacting baryonic matter and search for the mixed phase and critical endpoint. Spin physics experimental studies in collisions of polarized protons (deuterons) are planned as the second stage of the project. The first program requires providing of heavy ion collisions in the energy range of squrt(s) = 4-11 GeV at average luminosity of L = 1·1027 cm-2 s-1 for Au79+. The polarized beams mode is proposed to be used in energy range of squart(s) = 12-27 GeV (protons) at luminosity of L = 1·1030 cm-2 s-1. The key issue of the project is application of both stochastic and electron cooling methods at the NICA collider. The latter will be used in the NICA Booster for preliminary formation of the ion beam. The report contains description of the facility scheme and characteristics in heavy ion operation mode, the discussion of luminosity life time limitations, status and plans of the project development.
	Slides
MOIO07	Application of Cooling Methods to NICA Project	ion, electron, luminosity, emittance	25
	G. V. Trubnikov JINR, Dubna, Moscow Region
	Application of cooling methods a NICA project
	Slides
THCOB01	Radiactive Recombination of Heavy Bare Nuclei and Ions in Electron Cooling System	electron, ion, booster, heavy-ion	48
	A. V. Philippov, A. B. Kuznetsov JINR/VBLHEP, Dubna, Moscow region I. N. Meshkov JINR/DLNP, Dubna, Moscow region
	An attempt to present a comprehensive overview of experimental data of radiative recombination (RR) rate of nuclei (from protons to uranium) and various intermediate charge states of ions in electron coolers is presented at the report. A comparison of the experimental data for bare nuclei with theoretical models of H. Kramers, M. Bell and J. S. Bell, R. Schuch has been performed. It is shown that the RR rate of bare nucleus depends on the electron energy shift relatively (in the center of mass system) to optimal electron energy as dE−3/8 (in energy range dE > 1 meV) that is significantly different from the theoretical approaches, including averaging over the transverse electron temperature. Also it is shown that the RR rate of bare nucleus depends on transverse temperature as Ttr. Analysis of the experimental data for cooled heavy ions shows that the rates of the process critically depends on their charge state (electron configuration of ion shells) and for some charge states essentially increases having a resonant character. The estimations of RR rate losses of the Au32+, Au33+, Au43+, Au51+, Au61+, Au68+ and Au69+ ions beam due to RR process in the electron cooler of the Booster is presented. The bare nuclei Au79+ lifetime limitation due to RR process in the electron cooler of the Collider NICA is analyzed and measures of its increasing are considered.
	Slides
TUIOB01	Numerical Investigation of Stochastic Cooling at NICA Collider	accumulation, electron, ion, emittance	52
	T. Katayama GSI, Darmstadt I. N. Meshkov, G. V. Trubnikov JINR, Dubna, Moscow Region
	At the heavy ion collider NICA promoted at the Dubna, JINR, the stochastic cooling will play the crucial roles to manipulate the beam. The primary goal is to prevent the IBS diffusion effects to keep the high luminosity during the experimental cycle. The other main purpose is to accumulate the beam intensity up to several times 1·1010 from the injector NUCLOTRON with use of barrier bucket method. With this method, the short bunch formation is not necessary in the injector NUCLOTRON, and is transferred to the collider as a long bunch condition. After the BB accumulation the coasting beam is adiabatically bunched with the help of RF field and the stochastic cooling. In the present paper the detailed simulation results are presented for the above three process (mainly longitudinal freedom) .
	Slides
TUCOA01	Helical Cooling Channel Developments	dipole, emittance, simulation, electron	67
	R. P. Johnson, C. Y. Yoshikawa Muons, Inc, Batavia Y. S. Derbenev, V. S. Morozov JLAB, Newport News, Virginia
	Helical Cooling Channels, based on the same helical dipole Siberian Snake magnets used for spin control in synchrotrons and storage rings, are now proposed for almost all stages of muon beam cooling that are required for high luminosity muon colliders. We review the status of the theory, simulations, and technology development for the capture, phase rotation, 6-D ionization cooling, parametric-resonance ionization cooling, and reverse emittance exchange sections of one of the candidate scenarios for a high-luminosity. high-energy muon collider.
	Slides
TUPS11	Superconducting Shield for Solenoid of Electron Cooling System	simulation, electron, power-supply, vacuum	118
	A. V. Smirnov, N. N. Agapov, D. E. Donets, V. M. Drobin, S. Kulikov, R. Pivin, G. V. Trubnikov JINR, Dubna, Moscow Region G. L. Dorofeev RRC, Moscow
	The homogeneity of the magnetic field in the straight solenoid of the electron cooling system is the very important task. The superconducting solenoids are planned for electron cooling systems of collider rings of NICA project. To reach the necessary homogeneity in the straight section the superconducting shield was proposed. The experimental and numerical investigations of the field homogeneity with the superconducting shield are presented.