19–24 May 2024
Music City Center
US/Central timezone

Multiphysics simulations of thermal shock testing of nanofibrous high power targets

TUPS44
21 May 2024, 16:00
2h
Blues (MCC Exhibit Hall A)

Blues

MCC Exhibit Hall A

Poster Presentation MC4.T20 Targetry and Dumps Tuesday Poster Session

Speaker

William Asztalos (Illinois Institute of Technology)

Description

Increase of primary beam power for neutrino beam-lines leads to a reduced lifespan for production targets. New concepts for robust targets are emerging from the field of High Power Targetry (HPT); one idea being investigated by the HPT R&D Group at Fermilab is an electrospun nanofiber target. As part of their evaluation, samples with different densities were sent to the HiRadMat facility at CERN for thermal shock tests. The samples with the higher density, irradiated under a high intensity beam pulse, exhibit major damage at the impact site whereas those with the lower density show no apparent damage. The exact cause of this failure was unclear at the time. In this paper, we present the results of multiphysics simulations of the thermal shock experienced by the nanofiber targets that suggest the failure originates from the reduced permeability of the high density sample to air flow. The air present in the porous target expands due to heating from the beam, but is unable to flow freely in the high density sample, resulting in a larger back pressure that blows apart the nanofiber mat. We close with a discussion on how to further validate this hypothesis.

Funding Agency

This work was produced by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.

Region represented North America
Paper preparation format LaTeX

Primary author

William Asztalos (Illinois Institute of Technology)

Co-authors

Frederique Pellemoine (Fermi National Accelerator Laboratory) Prasenjit Rath (Indian Institute of Technology Bhubaneswar) Sujit Bidhar (Fermi National Accelerator Laboratory) Yagmur Torun (Illinois Institute of Technology)

Presentation materials

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