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arXiv · 2606.28440

Radiation Damage of TF-1 and PbWO$_4$ Crystals with 20 MeV Electrons

Hamlet G. Mkrtchyan·Arthur H. Mkrtchyan·Vardan H. Tadevosyan·Hrachya H. Marukyan·Argine S. Hakobyan·Ashot S. Hakobyan·Arthur A. Hoghmrtsyan·Diana G. Khurshudyan·Nina N. Prazyan·Albert H. Shahinyan·Adelina S. Stepanyan·Lusine R. Vahradyan
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Abstract

We studied the radiation hardness of two types of crystals, lead glass TF-1 and lead tungstate PbWO$_4$, using a 20 MeV electron beam from the LUE-75 linear accelerator at AANL. The transmittance of the crystals in the wavelength range of 200-1000 nm was measured before and after irradiation, and after thermal annealing. % The irradiation was performed in two stages. First, both crystals were irradiated with beam current of 0.125 $\mu$A, each for a total exposure time of 720 s and absorbing $5.6 \times 10^{14}~e^-$. % Strong degradation of the optical properties of TF-1 caused by this amount of radiation was observed, while the effect on PbWO$_4$ was negligible (it is a few tens of times radiation harder than TF-1). % In the second stage, only the PbWO$_4$ crystal was exposed to radiation, with a beam current of 0.28 $\mu$A and an exposure time of 1200 s, absorbing an additional $2.1 \times 10^{15}e^-$, still no notable effect. % Thermal annealing was performed in the temperature range of 160 to 250$^\circ$C (isochronal) for 10-12 hours. The transmittance of the annealed crystals increased with the annealing temperature and time.

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Hamlet G. Mkrtchyan, Arthur H. Mkrtchyan, Vardan H. Tadevosyan, Hrachya H. Marukyan, Argine S. Hakobyan, Ashot S. Hakobyan, Arthur A. Hoghmrtsyan, Diana G. Khurshudyan, Nina N. Prazyan, Albert H. Shahinyan, Adelina S. Stepanyan, Lusine R. Vahradyan. 2026-06-26. Radiation Damage of TF-1 and PbWO$_4$ Crystals with 20 MeV Electrons. https://arxiv.org/abs/2606.28440

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