Status of the LEPTA Project

Abstract

The project of the Low Energy Positron Toroidal Accumulator (LEPTA) is under development at JINR. The LEPTA facility is a small positron storage ring equipped with the electron cooling system. The project positron energy is of 4-10 keV. The main goal of the facility is to generate an intense flux of positronium atoms-the bound state of electron and positron. The focusing system of the LEPTA ring after solenoidal magnetic field remeasurement and correction has been tested with pulsed electron beam by elements. Some resonant effects of beam focusing have been observed. Storage ring of LEPTA facility was commissioned in September 2004. Since then the ring was equipped with additional beam diagnostics. The magnetic field quality in the ring was improved. Results of testing the storage ring with electron beam after the upgrade are presented. The experiments aiming to increase the life time of the circulating electron beam and test the electron cooling elector beam are in progress.

A sequential decision problem formulation and deep reinforcement learning solution of the optimization of O&M of cyber-physical energy systems (CPESs) for reliable and safe power production and supply

“…As a promising technology capable of meeting the Generation IV goals of Nuclear Power Plants (NPPs), ALFRED [55,56], a conceptual reactor design within the European nuclear community, has been the subject of various studies of reactor design [37,[57][58][59], control design [60,61], and reliability and risk analysis [62,63]. ALFRED is designed to operate in a flexible way [64][65][66] and is expected to reach operational conditions of an industrially deployable small modular lead fast reactor around the year 2035-2040 [55], making it a perfect candidate of NPPs to be considered for coping with the variability of RESs, within a load-following schedule.…”

Status of the LEPTA Project

“…First time a circulating electron beam was obtained in the LEPTA ring in September 2004 [1]. Experience of the LEPTA operation demonstrated main advantage of the focusing system using longitudinal magnetic field: long life-time of the circulating beam in a low energy range.…”