Design of the New Control System for Linac-200

Abstract

The construction of an experimental facility with test electron beams is under way at the Dzhelepov Laboratory of Nuclear Problems at the Joint Institute for Nuclear Research (Dubna, Russia). The facility is based on the MEA accelerator that was transferred from NIKHEF to JINR at the beginning of the 2000s. Despite the long service life of the accelerator, it is in good condition and still has a significant operation potential. The linac is being commissioned and the first 200-MeV beam has been generated. For now, the machine is controlled by a set of standalone subsystems that were created as required. Certain systems (e.g., vacuum) are controlled and monitored locally. However, a global control system is required to operate the accelerator as a user facility. The system requirements are formulated in this paper. The key issues of controlling the accelerator and its auxiliary (evacuation, cooling, etc.) systems are considered. The design of a new Tango-based control system of the Linac-200 is presented.

Interaction of photons with silver and indium nuclei at energies up to 20 MeV*

“…One unpaired proton located on the 1g9/2 subshell and a neutron, for example, on the 3s1/2 subshell, form the J π =4 + isomeric state. To form the ground state, the neutron must be on a subshell with a large spin (7/2) to form the J π =1 + state together with the proton shell 9/2 + [9].…”

“…The number of protons in the odd-even nuclei of 113 In and 115 In is close to the magic number Z = 50, and the number of neutrons is N = 64 and 66, respectively. The spin-parity of the ground state of 113 In and 115 In is determined by the 1g9/2 subshell, which contains nine protons [9].…”