Generation of ionizing radiation from lithium niobate crystals

The work done experimentally explores generation of electron and x-ray radiation in the process of heating and cooling monolithic and iron-doped crystals of lithium niobate. Iron doping to the concentrations in the range of 1023 m3 was carried out by adding ferric oxide into the melt during the proc...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-01, Vol.168 (1), p.12074
Main Authors: Orlikov, L N, Orlikov, N L, Arestov, S I, Mambetova, K M, Shandarov, S M
Format: Article
Language:English
Subjects:
Crystal growth
Crystal surfaces
Crystals
Current pulses
Deceleration
Doped crystals
Electric field strength
Electric strength
Electrons
Ferric oxide
Heating
Ionizing radiation
Iron
Lithium niobates
Priming
Radiation
Surface area
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Summary:The work done experimentally explores generation of electron and x-ray radiation in the process of heating and cooling monolithic and iron-doped crystals of lithium niobate. Iron doping to the concentrations in the range of 1023 m3 was carried out by adding ferric oxide into the melt during the process of crystal growth. The research into radiation generation was performed at 1-10 Pa. The speed of heating from -10 to 1070 C was 10-20 degrees a minute. Current pulses appeared at 17, 38, 56, 94, 98, 100, 105, 106, 1070 C with the interval of 1-3 minutes. The obtained electron current increased in direct proportion to the crystal surface area. The maximum current was 3mA at the design voltage 11 kV on the crystal with 14,5x10,5x10 mm3 surface area. The article describes the possibility to control the start of generation by introducing priming pulse. The results achieved are explained by the domain repolarization while heating the crystal and the appearance of electric field local strength. Bias and overcharge currents contribute to the appearance of electric strength, which stimulates breakdown and plasma formation. X-ray radiation appears both at the stage of discharge formation and during electron deceleration on gas and target material.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/168/1/012074