The fictive temperature and structural relaxation of a silica glass arc tube were investigated to elucidate the origin of cracking in the arc tubes used in high-intensity discharge lamps for vacuum ultraviolet light sources. The structural relaxation time near the inner surface was decreased much more than that in the inner bulk region, resulting in a large difference in the fictive temperature between these two areas at high-intensity discharge lamp operating temperatures. This difference should induce strain in the silica glass network. On the basis of our results, we suggest ways to avoid cracking and extend the lifetime of high-intensity discharge lamps.
H. Kakiuchida, K. Saito and A. J. Ikushima, “Fictive-Temperature Dependence of Structural Relaxation in Silica Glass,” Journal of Applied Physics, Vol. 94, No. 3, 2003, pp. 1705-1708. doi:10.1063/1.1587252
R. Le Parc, B. Champagnon, P. Guenot and S. Dubois, “Thermal Annealing and Density Fluctuation in Silica Glass,” Journal of Non-Crystalline Solids, Vol. 293-295, No. 1-2, 2001, pp. 366-369.
K. Saito, N. Ogawa, A. J. Ikushima, Y. Tsurita and K. Yamahara, “Effects of Aluminum Impurity on the Structural Relaxation in Silica Glass,” Journal of Non-Crystalline Solids, Vol. 270, No. 1-3, 2000, pp. 60-65.
N. Kuzuu, Y. Kokubo, T. Nishimura, I. Serizawa, L. H. Zeng, K. Fujii, M. Yamaguchi, K. Saito and A. J. Ikushima, “Structural Change of OH-Free Fused Quartz Tube by Blowing with Hydrogen-Oxygen Flame,” Journal of Non-Crystalline Solids, Vol. 333, No. 2, 2004, pp. 115-123. doi:10.1016/j.jnoncrysol.2003.10.004
H. Kakiuchida, K. Saito and A. J. Ikushima, “Precise Determination of Fictive Temperature of Silica Glass by Infrared Absorption Spectrum,” Journal of Applied Physics, Vol. 93, No. 1, 2003, pp. 777-779.
A. Agarwal, K. M. Davis and M. Tomozawa, “A Simple IR Spectroscopic Method for Determining Fictive Temperature of Silica Glasses,” Journal of Non-Crystalline Solids, Vol. 185, No. 1, 1995, pp. 191-198.
A. Schreiber, B. Kühn, E. Arnold, F.-J. Schilling and H.-D. Witzke, “Radiation Resistance of Quartz Glass for VUV Discharge Lamps,” Journal of Physics D: Applied Physics, Vol. 38, No. 17, 2005, pp. 3242-3250.
K. Saito, A. J. Ikushima, T. Kotani and T. Miura, “Improvement of the Ultraviolet-Proof Property of Silica Glass Fibers for ArF Excimer-Laser Applications,” Optics Letters, Vol. 24, No. 23, 1999, pp. 1678-1680.