Beam transport radiation shielding for branch lines 2-ID-B and 2-ID-C

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Description

The x-ray radiation shielding requirements beyond the first optics enclosure have been considered for the beam transport of the 2-ID-B and 2-ID-C branch lines of Sector 2 (SRI-CAT) of the APS. The first three optical components (mirrors) of the 2-ID-B branch are contained within the shielded first optics enclosure. Calculations indicate that scattering of the primary synchrotron beam by beamline components outside the enclosure, such as apertures and monochromators, or by gas particles in case of vacuum failure is within safe limits for this branch. A standard 2.5-inch-diameter stainless steel pipe with 1/16-inch-thick walls provides adequate shielding to reduce the ... continued below

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29 p.

Creation Information

Feng, Y.P.; Lai, B.; McNulty, I.; Dejus, R.J.; Randall, K.J. & Yun, W. August 1, 1995.

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Description

The x-ray radiation shielding requirements beyond the first optics enclosure have been considered for the beam transport of the 2-ID-B and 2-ID-C branch lines of Sector 2 (SRI-CAT) of the APS. The first three optical components (mirrors) of the 2-ID-B branch are contained within the shielded first optics enclosure. Calculations indicate that scattering of the primary synchrotron beam by beamline components outside the enclosure, such as apertures and monochromators, or by gas particles in case of vacuum failure is within safe limits for this branch. A standard 2.5-inch-diameter stainless steel pipe with 1/16-inch-thick walls provides adequate shielding to reduce the radiation dose equivalent rate to human tissue to below the maximum permissible limit of 0.25 mrem/hr. The 2-ID-C branch requires, between the first optics enclosure where only two mirrors are used and the housing for the third mirror, additional lead shielding (0.75 mm) and a minimum approach distance of 2.6 cm. A direct beam stop consisting of at least 4.5 mm of lead is also required immediately downstream of the third mirror for 2-ID-C. Finally, to stop the direct beam from escaping the experimental station, a beam stop consisting of at least 4-mm or 2.5-mm steel is required for the 2-ID-B or 2-ID-C branches, respectively. This final requirement can be met by the vacuum chambers used to house the experiments for both branch lines.

Physical Description

29 p.

Notes

INIS; OSTI as DE96002285

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  • Other Information: PBD: 1 Aug 1995

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  • Other: DE96002285
  • Report No.: LS--251(ANL)
  • Grant Number: W-31109-ENG-38
  • DOI: 10.2172/132728 | External Link
  • Office of Scientific & Technical Information Report Number: 132728
  • Archival Resource Key: ark:/67531/metadc620416

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • August 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Dec. 15, 2015, 6:03 p.m.

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Feng, Y.P.; Lai, B.; McNulty, I.; Dejus, R.J.; Randall, K.J. & Yun, W. Beam transport radiation shielding for branch lines 2-ID-B and 2-ID-C, report, August 1, 1995; Illinois. (digital.library.unt.edu/ark:/67531/metadc620416/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.