XV International Symposium on "Radiation from Relativistic Electrons in Periodic Structures "RREPS-25"

Neutron generation using a beam of relativistic electrons. Development of methods for measuring neutron fields with high spatial resolution

Not scheduled

20m

Poster Applications of monochromatic X, γ – ray and Terahertz beams produced by electron accelerators

Speaker

Dmitry Korovkin (JINR)

Description

The results of testing a neutron generation setup using beams of relativistic electrons at the LINAC-200 accelerator are presented. The setup is designed for testing neutron detectors with a specified energy in the range from 10 keV up to 18 MeV, using the time-of-flight (TOF) method for momentum determination. LINAC-200 is a linear electron accelerator with an energy range of 5–200 MeV, pulsed current from a few electrons per bunch up to 80 mA, and a maximum average current of 5 μA. Neutrons were generated using Pb, W, Be, and Fe targets.
To measure the neutron time-of-flight, scintillation detectors and a TOF system with FEU-87 photomultiplier tubes and “TOPAZ” photomultipliers based on microchannel plates (MCP) were used. A time resolution of 80 ps was achieved over a 15-meter flight path.
As part of the development of a neutron radiography research program within the FLAP collaboration, a new type of detector was developed and tested. The detector includes a ¹⁰B radiator, a detection system based on a chevron MCP stack, and a phosphor screen. The image is recorded by a high-resolution optical camera.