Irradiation of Fibres at SIS18

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 types of fibre are irradiated. The fibres are connected to outside the ring using non-radation hard (NRH) and Super RadHard (SRH) fibres. This allows measuring the attenuation and bit error rates in-situ and during beam operation.

Setup

sis18 setup4.jpg
Figure 1: Setup at the extraction septum in SIS18/S06
  • Blue: Radiation Sensors
    • Top: Alanine Sensors
    • Bottom: Neutron and other detectors
  • Green: Cables connecting to BG1 outside SIS18
    • light green left: NRH "Septum" (four fibres)
    • light green right: NRH "Leiter" (four fibres)
    • dark green: SRH (four fibres)
  • Orange (left): 600m SRH fibre "Septum" as close as possible to the extraction septum.
  • Orange and Yellow (left): 1600m SRH fibre and 100m NRH fibre "Septum" just 40 cm away from the septum
  • Orange and Yellow (right): 1600m SRH fibre and 100m NRH fibre "Leiter" just below the passerelle.

Connection from SIS18 to BG1

The fibres to be irradiated are connected from both ends
  • via SRH (dark green)
    • 600m SRH "Septum"
    • 1600m SRH "Leiter"
  • via NRH "Septum" (light green)
    • 100m NRH "Septum"
    • 1600m SRH "Septum"
  • via NRH "Leiter" (light green)
    • 100m NRH "Leiter"
    • unused

Some Pictures

  • Left: "Septum", Right: "Leiter" - ion beam from left to right:
    IMG 20140120 144608.jpg

  • "Septum" 600m SRH:
    IMG 20140120 142459.jpg

  • "Septum" top/left: 600m SRH, bottom/right: 1600m SRH and 100m NRH:
    IMG 20140120 142508.jpg

  • "Septum" top: 600m SRH, bottom/left: 1600m SRH and 100m NRH (from the back):
    IMG 20140120 142518.jpg

  • "Leiter" SRH 1600m and 100m NRH:
    IMG 20140120 142608.jpg

First Data

preliminary data

Figure 1: First data of irradiation of fibres at the extraction septum of SIS18.
The figures shows first and preliminary data of the five irradiated fibres, which are close to the extraction septum of SIS18. The approximate length of the fibres is given in the figure (NRH: non rad-hard fibre, SRH super rad-hard fibre). The values for attenuation are normalized to 1 km. The uncertainties are stated in the figure: Please note, that the values for the non rad-hard short (100m) fibres have large uncertainties. The values of the accumulated dose have been obtained using a gamma and a neutron detector at the ladder in combination with the values obtained from the Alanine sensors close to the fibres (septum and ladder), see figure of the set-up on top.

-- DietrichBeck - 24 Jul 2015
Topic attachments
I Attachment Action Size Date Who Comment
IMG_20140120_142459.jpgjpg IMG_20140120_142459.jpg manage 103 K 21 Jan 2014 - 08:14 DietrichBeck "Septum" SRH 600m
IMG_20140120_142508.jpgjpg IMG_20140120_142508.jpg manage 174 K 21 Jan 2014 - 08:18 DietrichBeck "Septum". top/left: 600m SRH, bottom/rigth: 1600m SRH and 100m NRH
IMG_20140120_142518.jpgjpg IMG_20140120_142518.jpg manage 151 K 20 Jan 2014 - 17:56 DietrichBeck "Septum". top: 600m SRH, bottom/left: 1600m SRH and 100m NRH (from the back)
IMG_20140120_142608.jpgjpg IMG_20140120_142608.jpg manage 126 K 21 Jan 2014 - 08:13 DietrichBeck "Leiter" SRH 1600m and 100m NRH
IMG_20140120_144608.jpgjpg IMG_20140120_144608.jpg manage 152 K 21 Jan 2014 - 08:22 DietrichBeck Left: "Septum", Right: "Leiter" - ion beam from left to right
irrad_SIS18_2014-07-24.jpgjpg irrad_SIS18_2014-07-24.jpg manage 83 K 24 Jul 2014 - 15:11 DietrichBeck preliminary data of irradiation at SIS18
irrad_SIS18_2014-11-04.jpgjpg irrad_SIS18_2014-11-04.jpg manage 97 K 05 Nov 2014 - 16:11 DietrichBeck preliminary data of irradiation at SIS18
irrad_SIS18_2014_09-30.jpgjpg irrad_SIS18_2014_09-30.jpg manage 59 K 30 Sep 2014 - 14:11 DietrichBeck preliminary data of irradiation at SIS18
irrad_data_sis-septum_2015-07-24.jpgjpg irrad_data_sis-septum_2015-07-24.jpg manage 65 K 24 Jul 2015 - 15:50 DietrichBeck preliminary data of irradiation at SIS18
sis18_setup4.jpgjpg sis18_setup4.jpg manage 1 MB 27 Mar 2014 - 12:44 DietrichBeck setup in sis18
Topic revision: r8 - 24 Jul 2015, DietrichBeck
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