论文信息 - Simulated Exposure Of An Optical Fiber To 100 Years Of The Iron Component Of Galactic Cosmic Rays

Simulated Exposure Of An Optical Fiber To 100 Years Of The Iron Component Of Galactic Cosmic Rays

A two hundred meter length of 100/140 micron Graded Index (GRIN) optical fiber was exposed to a beam of relativistic Fe ions, with an energy spectrum similar to that of galactic cosmic rays between 10 and 600MeV/amu, for 9.1 sec with a flux 2E7 ion/cm2 sec, for a total fluence of 2E6 ion/cm . No change in the optical characteristics of the fiber was noted in a measurement with a noise floor of less than 0.5dB/km. The major source of noise was due to vibration of the fiber. This exposure represents the total fluence of highly energetic Fe ions that would be expected to accumulate in space over a 100 year period of time due to the naturally occurring galactic cosmic rays GCR. The measurements were performed in early 1987.

E. Normand | J. A. Krinsky | T. L. Criswell | E. Normand | T. Criswell

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