Prospects for Using the Source of Krion-6T Multicharged Ions on the NICA Injection Complex: The Multiple Injection of Heavy Element Ions

The Krion-6T Electron string ion source (ESIS) is the main device for heavy ion production for the Nuclotron-based Ion Collider fAcility (NICA) injector. The ion source was created at Laboratory of High Energy Physics, Joint Institute for Nuclear Research (JINR), and it has been used several times for heavy ion beams production at the Nuclotron injector. Recently, Ar¹³⁺ and Xe²⁸⁺ ion beams produced with the Krion-6T ESIS have been accelerated in the Heavy Ion Linac (HILAC) Booster (booster synchrotron) Nuclotron session in framework of the 4th stage of commissioning of the NICA complex. Further development of the ion source requires the production of Xe^32+–34+ and Bi^35+–37+ ion beams and their multiple injection through RFQ-HILAC into Booster and Nuclotron. Currently, Xe²⁸⁺ ion beams have been produced in the Krion-6T ESIS in a multipulse mode (up to ten pulses per series), extracted from the ion source with an interval of 100 ms between pulses. In the near future, the accumulation and electronic cooling of this series of the ion pulses in the Booster synchrotron is proposed. This should make it possible to increase the intensity of the ion beam in the Booster by an order of magnitude. The time of the acceleration cycle is the NICA complex is assumed to be 4–6 s. An approved technology for the injection of bismuth atoms into the Krion-6T ion source is reported; the first stand results of Bi³⁷⁺ ion beams production are briefly presented and discussed.