Booster is a standard element in the schemes of the synchrotron facilities of heavy ions. In our case its objectives are as follows


Download 445 b.
Sana22.02.2017
Hajmi445 b.



Introduction

  • Booster is a standard element in the schemes of the synchrotron facilities of heavy ions. In our case its objectives are as follows.

  • 1. Acceleration of the beams to an energy sufficient for the complete stripping of the ions Au32+.

  • 2. The accumulation of Au32+ ions in different modes of ion source operation.

  • 3. The relief of requirements for vacuum system in Nuclotron.

  • 4. The increase of ion phase density in the Booster using electron cooling at the optimum energies close to 100 MeV / nucleon.

  • 5. The refusal of the acceleration in collider.

  • It should be noted that Nuclotron designed as an accelerator for nuclei up to calcium therefore these features can only be implemented in a synchrotron built for heavy ions like Au32+.



Position

  • The iron yoke of the Synchrophasotron after the magnet winding is removed, gives a free tunnel of 4 x 2.3 m2. The present layout of the Nuclotron and existing injection and extraction systems make it possible to place the Booster having 211.2 m circumference and four fold symmetry inside the Synchrophasotron yoke.



Position



Main parameters



Main parameters

  • Cycle diagram



Lattice

  • FODO lattice



Lattice

  • FODO lattice



Superconducting magnets



Injection



Injection

  • Four turn injection



Acceleration



Acceleration



Electron cooling

  • The Booster electron cooling system is aimed to form required optimal phase volume of the bunch for their further acceleration in Nuclotron. The maximum designed electron energy is 60 keV.

  • Numerical simulations of the cooling process showed that the cooling section of 4 m of the total length and electron current of 1 A provides required ion beam parameters at the ion energy of 100 MeV/u. The parameters are typical for conventional electron cooling systems, the energy corresponds to minimum range of the RF frequency variation (0.6  2.4 MHz) during the Booster working cycle. To adjust the cooling section with the SC magnetic system at minimum length, one plan to use a superconducting solenoid for the electron beam transportation, that is main technical peculiarity of the Booster cooler.



Electron cooling



Extraction

  • Fast extraction system consists of kicker magnet and superconducting Lambertson Magnet (steel septum).

  • Slow extraction includes 4 quadrupole and 4 sextupole lenses, electrostatic septum and septum magnet. Minimum emittance of extracted beam will be provided by Hardt condition and dynamic bump.






Do'stlaringiz bilan baham:


Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2017
ma'muriyatiga murojaat qiling