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Emerging technologies for crystal-based gamma-ray light sources

Periodic Reporting for period 1 - TECHNO-CLS (Emerging technologies for crystal-based gamma-ray light sources)

Période du rapport: 2022-06-01 au 2023-05-31

TECHNO-CLS project at the breakthrough in technologies needed for designing and practical realisation of novel gamma-ray Light Sources (LS) operating at photon energies from ~100 keV up to GeV range that can be constructed through exposure of oriented crystals (linear, bent and periodically bent) to the beams of ultrarelativistic charged particles. The TECHNO-CLS high-risk/high-gain science-towards-technology breakthrough research programme will address the physics of the processes accompanying the oriented crystal exposure to irradiation by the high-energy electron and positron beams at the atomistic level of detail needed for the realisation of the TECHNO-CLS goals. A broad interdisciplinary, international collaboration has been created previously in the frame of FP7 and H2020 projects, which performed initial experimental tests to demonstrate the crystalline undulator (CU) idea, production and characterisation of periodically bent crystals and the related theory. TECHNO-CLS aims to build the high-risk/high-gain sciencetowards- technology breakthrough research programme on these successful studies aiming at a practical realisation of the novel gamma-ray LSs such as CUs, crystalline synchrotron radiation emitters, and many others. Additionally, by means of a pre-bunched beam a CU LS has a potential to generate coherent superrradiant radiation with wavelengths orders of magnitudes less than 1 Angstrom, i.e. within the range that cannot be reached in existing LSs based on magnetic undulators. Such LSs will have many applications in the basic sciences including nuclear and solid-state physics and the life sciences. Theoretical, computational, experimental and technological results obtained in the course of this project will pave a way for key technological developments of the LSs and their wide exploitation. The TECHNO-CLS international collaboration possesses all the necessary expertise to conduct successfully the outlined programme.
1. Manufacture of bent and periodically bent crystalline samples by means of previously developed techniques (mechanical bending, surface grooving, deposition of stripes, growing of silicon-germanium and diamond-boron superlattices).
2. Experimental characterization of the fabricated crystalline samples at synchrotron B16 beamline of the Diamond Light Source and at the ESR facility.
3. Experiments carried out that allowed to positively assess a Pulse Laser Melting (PLM) technology as a novel technique to produce bent and periodically bent crystalline structures.
4. Development of the diagnostic system for the analysis of the structure of the acoustically excited crystals.
5. Two construction stages out of three planned for the first two years of the project have been performed towards building a beam transport system for monochromatic low divergence 600 MeV positron beam to be used in channeling experiments at the Mainz Mikrotron (MAMI) facility at University of Mainz;
6. Started preparation for approved channeling experiments at CERN with 1-10 GeV electron and positron beams in linear, bent and periodically bent crystals.
7. The process of photon emission by 10 GeV electrons and positrons in periodically bent diamond, silicon and germanium crystals has been characterized via accurate atomistic simulations carried out by means of MBN Explorer software.
8. Molecular dynamics simulations have been performed by means of MBN Explorer software package developed by the MBN RC to quantify the impact of dopant concentration on structure of SiGe superlattices.
9. Systematic numerical evaluation of the impact of radiation reaction force on the channeling phenomenon at ultra-high energies.
1. Design study for a 500 MeV positron beam at the Mainz Microtron MAMI.
2. Experimental characterization of fabricated crystalline samples made of novel materials (Iridium, Tungsten, Silicon Carbide) for potential application in CLSs.
3. Application of the PLM technology as a technique to produce bent crystals.
4. Advance numerical analysis of feasibility of creating a crystalline undulator by means of acoustic waves (AW). The analysis has been followed by designing and specification of the corresponding experimental setup for (i) AW excitation, (ii) characterization of the resulting crystalline structure, (iii) carrying out channeling experiments.
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