Dielectronic recombination is an important electron ion-collision process that governs the charge balance of plasmas. Moreover, the resonant nature of this process can be exploited for the spectroscopy of multiply excited levels in atomic ions. This electron-ion collision spectroscopy is particulary competitive for highly charged ions where lasers are not available for the large transition...
The Nuclotron-based Ion Collider fAcility (NICA) is under mounting in JINR. The Collider first beam tests are planned for the second half of 2025. The goal of the NICA project is to provide colliding beams for studies of collisions of heavy fully stripped ions at energies up to 4.5 GeV/u. The NICA accelerator facility consists of following accelerators: the new acting heavy ion linac HILAC at...
HITRAP is a facility for deceleration of highly charged ions (HCI) produced by the GSI accelerator [1]. It consists of an IH-structure and an RFQ for deceleration down to several keV/q, as well as three beam bunchers and several beam transport sections. The linear deceleration stages reduce the ion energy from 4 MeV/u to 500 keV/u and to 6 keV/u respectively, resulting in a slow, but very hot...
It is known that in slow collisions of two bare nuclei with the total charge number exceeding the critical value, Z_1+Z_2 > Z_c =173, the initially neutral vacuum can spontaneously decay into a charged vacuum and two positrons. The detection of spontaneous emission of positrons would be a direct proof of this fundamental phenomenon. However, the spontaneous emission of positrons is usually...
We present several particle detectors dedicated for the Rare-RI Ring (R3) storage ring. Since R3 in the cyclotron facility stores only a single ion at each injection, conventional beam diagnostics such as beam profile monitors and wire scanners are inapplicable. Thus, we have developed unique detectors as follows,
- Revolution time monitor, “delta-ray” detector which directly measures...
We present an overview of laser cooling as a new method to cool highly relativistic beams at future research facilities such as FAIR and HIAF. We first dive into understanding the mechanisms of laser cooling at relativistic energies, giving estimates for cooling times and their scaling with beam energy and ion charge state for a given accelerator. We further look into the specific beam...
Jet beams are widely used as targets in many fields of physics. Prominent examples are scattering experiments at hadron and lepton accelerators or at terawatt laser facilities, where pure and windowless targets with adjustable thickness are required in vacuum. Depending on the specific experimental situation, different types of targets such as gas-jets, cluster-jets or pellet streams can be...
The four fundamental interactions and their symmetries, the fundamental constants as well as the properties of elementary particles like masses and moments, determine the basic structure of the universe and are the basis for our so well tested Standard Model (SM) of physics. Performing stringent tests on these interactions and symmetries in extreme conditions at lowest energies and with...
The Rare-RI Ring (R3) facility is a unique storage ring facility coupled with the cyclotron complex at the RIKEN RI beam factory [1]. Ions of interest are in-flight selected and are individually injected in the storage ring where the precision isochronous condition is realized. The event-by-event data processing is performed with information from auxiliary detectors installed at the fragment...
Several nuclear reactions are best investigated when the momentum transfer to the nucleus is small. Among these are the IsoScalar Giant Monopole Resonance (ISGMR) which helps determine one of the parameters of the equation of state, namely the incompressibility of nuclear matter, and proton elastic scattering from nuclei which is sensitive to parameters of nuclear density such as the matter...