Effects in B–doped KDP crystals irradiated with neutrons of large spectra energy

✍ Scribed by G. Fischfeld; A. Affranchino; A. Di Loreto; C. Rocco

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 238 KB
• Volume: 39
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.200410277

✦ Synopsis

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.