Publication Date:
1993
abstract:
A fiber-optic Mach-Zehnder interferometer was used for x-ray detection. A single-mode, polarizationpreserving
silica fiber is exposed to a high-flux x-ray beam (x-ray tube for diagnostic radiology, 30 kV,
16.8-keV average energy, 17-40-mA anodic current), modulated at f = 9 Hz by a chopper with steel
blades. The energy absorbed produces a modulated temperature rise that induces a phase shift in the
propagation of a He-Ne laser beam with respect to the unirradiated arm of the interferometer. We
measured the linearity of the temperature rise with the energy released to the fiber and the linearity of the
peak amplitude at frequency f in the power spectrum of the interferometric signal with the anodic current
of the x-ray tube. A possible application of this technique to synchrotron radiation monitoring is
discussed.
silica fiber is exposed to a high-flux x-ray beam (x-ray tube for diagnostic radiology, 30 kV,
16.8-keV average energy, 17-40-mA anodic current), modulated at f = 9 Hz by a chopper with steel
blades. The energy absorbed produces a modulated temperature rise that induces a phase shift in the
propagation of a He-Ne laser beam with respect to the unirradiated arm of the interferometer. We
measured the linearity of the temperature rise with the energy released to the fiber and the linearity of the
peak amplitude at frequency f in the power spectrum of the interferometric signal with the anodic current
of the x-ray tube. A possible application of this technique to synchrotron radiation monitoring is
discussed.
Iris type:
01.01 Articolo in rivista
Keywords:
X rays; fiber-optic sensors; synchrotron radiation
List of contributors:
Liuzzi, Raffaele
Published in: