Irradiation of Fibres at HHD Cave (SIS18 beam dump)

Introduction

For FAIR, timing sensitive equipment will be installed in the niches of SIS100. It might be possible, that fibres to the niches will be guided via the SIS100 itself. Those fibres must be radiation hard. In order to test fibres under a realistic conditions, we try to irradiate fibres directly under the extraction septum of SIS18 during 2014. The following type of fibre is irradiated.

• Super RadHard (SRH) Single-Mode Optical Fibre (Draka)

The fibre is connected to outside the cave using using non-radation hard (NRH). This allows measuring the attenuation and bit error rates in-situ and during beam operation.

Setup

600m of SRH fibre, fluorescent screen and converter (not shown) are mounted on movable supports and can be moved independently from each other.

Some Pictures

• Installed fibre in HHD cave:
  

• Fibres for irradiation (front):
  

• fibres for irradiation (side):
  

• Fibres with Alanine sensors:
  

• Fibre:
  

-- DietrichBeck - 23 Jan 2014