Search

Your search keyword '"Berghmans, F."' showing total 2 results
Start Over Author "Berghmans, F." Publication Year Range Last 50 years Publisher american institute of physics
2 results on '"Berghmans, F."'

1. Gamma-irradiation tests of IR optical fibres for ITER thermography—a case study.

Author

Reichle, R., Brichard, B., Pocheau, C., Jouve, M., van Ierschot, S., Martinez, S., Ooms, H., Berghmans, F., and Decréton, M.

Subjects
GAMMA rays, OPTICAL fibers, THERMOGRAPHY, IRRADIATION, SILICA
Abstract

In the course of the development of a concept for a spectrally resolving infrared thermography diagnostic for the ITER divertor we have tested 3 types of infrared (IR) fibres in Co60 irradiation facilities under γ irradiation. The fibres were ZrF4 (and HfF4) fibres from different manufacturers, hollow fibres (silica capillaries with internal Ag/AgJ coating) and a sapphire fibre. For the IR range, only the latter fibre type encourages to go further for neutron tests in a reactor. If one restricted the interest onto the near infrared range, high purity core silica fibres could be used. This study might be seen as a typical example of the relation between diagnostic development for a nuclear environment and irradiation experiments. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF

2. Index and density changes induced by proton radiation in lanthanum crown glass.

Author

Gusarov, A., Doyle, D., Hermanne, A., and Berghmans, F.

Subjects
LANTHANUM, OPTICAL glass, REFRACTIVE index, PROTONS
Abstract

We studied the refractive index and density changes in cerium-doped lanthanum crown glass irradiated in air with 38.5 MeV protons. At a low proton fluence, the index change is linear with dose, and reaches 2.4x10[sup -5] at 2.7x10[sup 12] p/cm[sup 2] (0.65 Mrad dose). The rate of index change decreases with the proton fluence, but at high total dose (10[sup 14] p/cm[sup 2]) radiation-induced surface dilatation and birefringence start to appear. Our results show that the present concept of radiation-hard optical glass should be revised and that a high dose of proton radiation can produce index changes sufficient for the fabrication of integrated optical devices. © 2001 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2001
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results