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Generic guide conce...
Generic guide concepts for the European Spallation Source
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- Zendler, Carolin (författare)
- Lund University,Lunds universitet,European Spallation Source ESS AB,Stiftelser och övriga anknutna verksamheter,Other Institutions and Utilities
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- Rodriguez, D. Martin (författare)
- Uppsala universitet,Materialfysik
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- Bentley, P. M. (författare)
- Uppsala University,Lund University,Lunds universitet,Uppsala universitet,Materialfysik,European Spoliat Source ESS AB, S-22100 Lund, Sweden.,European Spallation Source ESS AB,Stiftelser och övriga anknutna verksamheter,Other Institutions and Utilities
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(creator_code:org_t)
- Elsevier BV, 2015
- 2015
- Engelska.
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Ingår i: Nuclear Instruments and Methods in Physics Research Section A. - : Elsevier BV. - 0168-9002 .- 1872-9576 .- 0167-5087. ; 803, s. 89-99
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The construction of the European Spoliation Source (ESS) faces many challenges from the neutron beam transport point of view: the spoliation source is specified as being driven by a 5 MW beam of protons, each with 2 GeV energy, and yet the requirements in instrument background suppression relative to measured signal vary between 10(-6) and 10(-8). The energetic particles, particularly above 20 MeV, which are expected to be produced in abundance in the target, have to be filtered in order to make the beamlines safe, operational and provide good quality measurements with low background. We present generic neutron guides of short and medium length instruments which are optimised for good performance at minimal cost. Direct line of sight to the source is avoided twice, with either the first point out of line of sight or both being inside the bunker (20 m) to minimise shielding costs. These guide geometries are regarded as a baseline to define standards for instruments to be constructed at ESS. They are used to find commonalities and develop principles and solutions for common problems. Lastly, we report the impact of employing the over-illumination concept to mitigate losses from random misalignment passively, and that over-illumination should be used sparingly in key locations to be effective. For more widespread alignment issues, a more direct, active approach is likely to be needed.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)
Nyckelord
- Neutron guides
- Neutron scattering instrumentation
- Misalignment
- European spoliation source
- VITESS
- Monte Carlo simulation
- Monte Carlo simulation
- VITESS
- European spoliation source
- Misalignment
- Neutron scattering instrumentation
- Neutron guides
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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