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Effects in B–doped KDP crystals irradiated with neutrons of large spectra energy
Author(s) -
Fischfeld G.,
Affranchino A.,
Di Loreto A.,
Rocco C.
Publication year - 2004
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200410277
Subject(s) - pockels effect , irradiation , doping , neutron , dopant , neutron temperature , analytical chemistry (journal) , materials science , crystal (programming language) , optics , chemistry , atomic physics , laser , physics , optoelectronics , nuclear physics , chromatography , computer science , programming language
Abstract The results obtained for the r 63 electro‐optic coefficient of B‐doped and undoped KDP (KH 2 PO 4 ) crystals irradiated with neutrons (including thermalized neutrons) produced by scattering of 30 Mev cyclotron protons on a target of Ta 201 , are presented and compared to those obtained for non‐irradiated doped and undoped crystals. The B‐doped (H 3 BO 3 , Na 2 B 4 O 7 and Li 2 B 4 O 7 ) crystals were obtained by the conventional growth method by temperature decrease with 1 wt % dopant concentration in solution. The thermal neutron flux was around ϕ = 1. 10 10 n/cm 2 s. Pulses of ∼15 μs long, in damped oscillatory mode (V= 8 kV, τ=1.95 μs) were used for the electro‐optic measurements. A Pockels cell, a photomultiplier, a He‐Ne laser (λ=632.8 nm, 5 mW, linearly polarized) and a Tk 720 A oscilloscope complete the experimental setup. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)