| Paper | Title | Page |
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| MOBCH01 | Storage, Acceleration and Short Bunched Beam Formation of 197Au+79 Ions in the NICA Collider | 30 |
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| The regimes of high intensity beam of 197Au79+ ions in NICA Collider is considered. The first stage – ion storage is proposed to be performed with Barrier Bucket technique at ion energy of 1–3 GeV/u. Experiments in collider mode in this energy range can be performed at injection energy. For experiments at higher, up to 4.5 GeV/u, energy ions are accelerated with the same BB method. Formation of bunched beam is fulfilled in two steps – first, at 24th harmonics and then, final formation, at 72th harmonics of RF system. The possibility of achievement of designed bunch parameters is shown. | ||
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Slides MOBCH01 [0.807 MB] | |
TUYCH01 |
Application of the Beam Cooling Methods at the NICA Project | |
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| The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR aimed to provide experiments with colliding heavy ions up to Au for experimental study of hot and dense strongly interacting baryonic matter and search for possible signs of the mixed phase and critical endpoint in the centre-of-mass energy range sq.root(SNN) = 4-11 GeV. This facility includes new 3 MeV/u linac, 600 MeV/u booster synchrotron (Booster), upgraded superconducting (SC) synchrotron Nuclotron (4,5 GeV/u maximal kinetic energy for ions with Z/A = 1/3) and collider consisting of two vertically separated SC rings, which provide average luminosity of the order of 10e27cm2s1 at high energies. Beam cooling systems are proposed for elements of the NICA project. The Booster synchrotron will be equipped with an electron cooling system. Two beam cooling systems – stochastic and electron will be used in the collider rings. Parameters of the cooling systems, proposed scenario of operation and peculiarities of their design intended to achieve required beam parameters are presented in this report. | ||
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Slides TUYCH01 [3.574 MB] | |
| TUYCH02 | Beam Cooling at NICA Collider | 53 |
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| At the NICA collider project it is planned to make collision of 24 short bunches, each containing around 109 197Au79+ ions, at the two colliding points in the ring. The operation energy is envisaged from 1 GeV/u to 4.5 GeV/u. To prepare such beam conditions, the beam cooling technique, stochastic and electron beam, is employed at the beam accumulation from the injector Nuclotron and the following short bunch formation stage. Rather long pulse beam could be injected and accumulated in the collider with use of barrier voltage and beam cooling. After the enough beam accumulation, typically 2.4·1010, the high voltage RF with harmonic number 24 is applied to the accumulated coasting beam as well as the beam cooling which allow us to make the required short bunch of around 1nsec rms bunch length. The equilibrium condition is attained after 100~200 sec cooling, with the balance of RF force, cooling effects, IBS diffusion and the space charge repulsion force. In the present paper, detailed simulation results of beam accumulation and short bunch formation with stochastic cooling and electron cooling are presented including the space charge effects. | ||
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Slides TUYCH02 [6.065 MB] | |