ESS Docs Document 360-v4

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Internal Note: A Study of ESS HEBT Collimator Options

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Document type:
Tech Note
Submitted by:
Håkan Danared
Updated by:
Håkan Danared
Document Created:
22 Apr 2015, 10:45
Contents Revised:
22 Apr 2015, 16:52
Metadata Revised:
22 Apr 2015, 16:52
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22 Apr 2015, 16:47
22 Apr 2015, 11:06
22 Apr 2015, 10:45
With a nominal beam power of 5 MW, the demands for low relative beam losses in the European Spallation Source (ESS) accelerator are unprecedented. In the High Energy Beam Transport (HEBT), where the beam first reaches full power, this is especially relevant. The acceptance of the HEBT should thus encompass beams of non-nominal parameters and ideally be tolerant to partial hardware failure for at least a full pulse of 2.86 ms. In this paper, the need for HEBT collimators is assessed by discussing beam simulations and typical hardware failure modes. Only collimation of the primary proton beam is treated here, i.e. not e.g. the neutrons backstreaming from the target.
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