Brief annotation and scientific rationale:
It is planned to develop the fields of research at which the new collaboration FLAP (Fundamental & applied Linear Accelerator Physics collaboration) is focused, namely, investigation of the mechanisms of electromagnetic interactions and new applications, including the creation of neutron sources, controllable generation of various types of electromagnetic radition, such as diffraction Cherenkov and THz radiation in a range from 1 to 10 THz by relativistic electrons. Development of the new methods of charged particle beam diagnostics, testing and calibration of particle and radiation detectors for collider and other accelerator experimetns, including teh creation of time-of-flight calibrated beams of secondary neutrons with energies from thermal to 20 MeV.

Expected results upon completion of the project:
The main global results of the project will be:
- creation of a unique scientific-research installation for investigation of the mechanisms of generation of electromagnetic radiation in a wavelength range from 1 mm (microwave range) to 1 pm (g radiation) at interaction of relativistic electron beams wtih matter and external electromagnetic fields;

Expected results of the project this year:
Creation and beam testing of particle detectors based on fast scintillator.

Registration of GHz and THz radiation from active targets irradiated by relativistic electron beams.

Creation of the time of flight test bench for registration of secondary neutrons.

Testing of stilbene-based scintillators for n - g separation.

2025-2027

Brief annotation and scientific rationale:
Continuation of filling in the experimental data base on multiple particle production in an energy range from 1 to 300 GeV obtained in experiments with bubble chambers.

Expected results at the end of the activity:
Creation of the required equipment for digitizing of experimental film information obtained using bubble chambers and in fixed-target  electronic experiments in the conditions of registration of multiple particle production in an energy range of 1-300 GeV.

2025-2027

Brief annotation and scientific rationale:
Experimental studies of deep subthreshold and cumulative reations at extracted beams of Nucltron-N (SPD Test Zone, MARUSYA facility).

Expected results at the end of the activity:
New experimental data on A-dependences of rare subthreshold and cumulative processes of pion, kaon, and light nuclei production depending on the type and energy of projectile nuclei, momentum and angle of registered particles.

Expected major results in the current year:
Putting in operation of the upgraded magnetooptical channel of MARUSYA facility.

Reconstruction of the experimental zone of the spectrometer channel at F4. Creation of the new data acquisition system of the facility. Putting in operation of track detectors. Development and creation of the neutron detector. Testing of the Cherenkov detector.

2025-2027

Brief annotation and scientific rationale:
Experimental study of the methods for registration and measurement of neutron resonances upon passage of radiation generated by a neutron source through various materials. Neutron resonance spectroscopy and radiography for investigation of the properties of materials in extreme states.

Development and study of the methods of nondestructive inspection of samples and materials using thermal and epithermal neutrons.

A neutron image detector with high spatial (20-50 mkm) and time (50-100 ns) resolution will be developed in the framework of development of methods of real-time neutron tomography with thermal and resonance neutrons.  This study is aimed at a broad range of fast processes in the field of the physics of extreme states of matter and material research. This method will allow one to study the physical and chemical composition of machine-building materials, gaseous cavities inside structural materials with high atomic mass. Another important advantage of neutron radiography is the possibility of visualization of hydrogen-containing substances in a metal matrix.

Expected results at the end of the activity:
Practical implementation of the method of nondestructive measurement of parameters of materials in extreme states. Practical implementation of the method of nondestructive study of composite materials.

Study of the feasibility of development of low-current power supply elements based on decay of unstable isotopes produced using a neutron source.

Expected major results in the current year:
Numerical and experimental determination of optimal characteristics of the neutron source.

Experimental determination of an optimal configuration of the experiment design to achieve the required measurement precision.

Improvement of methods for registration of parameters of neutron resonances.

Measurement of experimental spectra of neutrons from various materials irradiated by accelerated electron beams.