Abstract
Pure silica core multimode step-index fibres with high OH and low OH contents were irradiated up to ≈ 2.5 MGy in order to test their gamma-radiation resistance in the visible range. To achieve this dose, two successive irradiations at dose rates of ≈ 0.3 kGy/h and ≈ 24.0 kGy/h were conducted in the CMF gamma irradiation facility of SCK·CEN, Mol, Belgium. The radiation-induced attenuation was measured continuously during and after irradiations from 400 nm to 1200 nm. The radiation-induced absorption band at 600 nm was observed in both types of fibre. A saturation of its growth occurred during the first irradiation and persisted during the next irradiation at higher dose rate. This might reveal a hardening phenomenon due to the first irradiation. Radiation-induced attenuation maximum values of 0.5 dB/m and 1.2 dB/m were found at 600 nm for the high-OH and low-OH types respectively. In fibroscopy this radiation-induced absorption band at 600 nm will be a limiting factor. However the radiation resistance improvement after a first irradiation would bring potential benefits.
| Original language | English |
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| Title of host publication | Proceedings of the European Conference on Radiation and its Effects on Components and Systems, RADECS |
| Publisher | IEEE Computer Society and the Association for Computing Machinery |
| Pages | 507-511 |
| Number of pages | 5 |
| ISBN (Print) | 0-7803-3093-5 |
| DOIs | |
| State | Published - Sep 1995 |
| Event | Proceedings of the 1995 3rd European Conference on Radiation and its Effects on Components and Systems - Arcachon, Fr Duration: 18 Sep 1995 → 22 Sep 1995 |
Conference
| Conference | Proceedings of the 1995 3rd European Conference on Radiation and its Effects on Components and Systems |
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| City | Arcachon, Fr |
| Period | 1995-09-18 → 1995-09-22 |
ASJC Scopus subject areas
- Radiation
- Electrical and Electronic Engineering