The radiation tolerance of specific optical fibres exposed to 650 kGy(Si) of ionizing radiation

Abstract

The radiation tolerance of specific optical fibres exposed to 650 kGy(Si) of ionizing radiation To cite this article: B Arvidsson et al 2009 JINST 4 P07010 View the article online for updates and enhancements. Recent citations Gary Pickrell et al -JTAG-based remote configuration of FPGAs over optical fibers B. Deng et al

The radiation induced attenuation of optical fibres below −20°C exposed to lifetime HL-LHC doses at a dose rate of 700 Gy(Si)/hr

“…A number of fibres were tested at warm temperatures (up to 70 • C) to doses in excess of 500 kGy(Si), and were found to perform well [6]. For example, the radiation induced attenuation expected for a realistic route through the ATLAS detector was found to be 0.14 dB for Corning SMF-28e.…”

“…However, these tests were performed at a dose rate of 27 kGy(Si)/hr, orders of magnitude higher than that expected at the HL-LHC. Research has shown that RIA is strongly dependent upon dose rate [5,6], and so the other fibres could not be excluded from use. This paper describes tests performed at low temperatures (between -24 • C and -30 • C) and at a comparatively low dose rate of 0.7 kGy(Si)/hr.…”

“…This pool of water provided shielding and also cooling for the test reactor BR2 on site. Details of the RITA facility and the dosimetry used can be found in the literature [6]. Since a dose rate gradient existed and different test fibres were situated at different heights within the radiation environment, the data analysis for each fibre used a corresponding dose rate, summarised in table 1.…”

“…When a fibre is removed from a radiation environment, the RIA rapidly reduces. However, this is a fake annealing as when the exposure is resumed the RIA immediately returns to its previous value [6].…”

Optical Fibers and Optical Fiber Sensors Used in Radiation Monitoring

“…The RIA is affected by: 1. the manufacturing conditions, the parameters related to the technology used in producing the optical fiber: the deposition conditions, the draw process characteristicsdraw speed, fiber drawing tension, the preform deposition temperature, oxygen-toreagent ratio (02/R) used during core and clad deposition (Friebele, 1991;Girard et al, 2006;Hanafusa et al, 1986); 2. the existence, prior to the irradiation, of some precursors (Miniscalco et al, 1986); 3. the dopants present in the optical fiber core or cladding (pure silica, or doped with Ce, Er, Ge, F, N, P, Yb, high-OH, low-OH, high-Cl, low-Cl, H2-loading), (Arvidsson et al, 2009;Berghmans, 2006;Berghmans et al, 2008;Bisutti et al, 2007;Brichard & Fernandez Fernandez, 2005;Friebele, 1991;Girard et al, 2004a;Girard et al, 2004b;Girard et al, 2008;Griscom et al, 1996;Henschel et al, 1992;Kuyt et al, 2006;Lu et al, 1999;Mady et al, 2010;Paul et al, 2009;Regnier et al, 2007;Vedda et al, 2004;Wijnands et al, 2007), in some situations such ingredients contribute to the radiation hardening (Brichard et al, 2004;Brichard & Fernandez Fernandez, 2005;Girard et al, 2009); 4. the residual substances remaining after the manufacturing process, as for example chlorine having an associated color center in the UV spectral range, which can extend into the visible Girard & Marcandella, 2010); 5. the type of radiation to which the optical fiber is subjected (Arvidsson et al, 2009;Bisutti et al, 2007;Brichard et al, 2001;Calderón et al, 2006;Girard et al, 2004a;Girard et al, 2004b;…”