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A Concept for the Fourth DUNE Far Detector Module

Document #:
Document type:
DUNE document
Submitted by:
James Sinclair
Updated by:
Anne Heavey
Document Created:
25 Sep 2018, 12:11
Contents Revised:
13 Jun 2019, 06:45
Metadata Revised:
15 Jun 2020, 11:01
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Of the four proposed 10 kt liquid argon (LAr) Far Detector (FD) modules envisaged for the
Deep Underground Neutrino Experiment (DUNE) neutrino-oscillation experiment, three have
been assigned to single- or dual-phase Time Projection Chambers (TPCs), but the design of
the TPC for the fourth module has yet to be decided. Here we propose a novel approach for
the TPC design of the fourth module. The core of this proposal is a charge-readout system
free from reconstruction ambiguities, and a robust TPC design that reduces high-voltage risks
while increasing the coverage of the light collection system. For the charge-readout system,
we propose using the charge-collection pixels and associated application-specific integrated
circuits currently being developed for the LAr component of the DUNE Near Detector design,
ArgonCube. In addition, we propose dividing the TPC into a number or shorter drift volumes,
reducing the total voltage used to drift the ionisation electrons, and minimising the stored
energy. Segmenting the TPC also allows for the localisation of scintillation light and a more
expansive light-readout system. Furthermore, the design opens the possibility of replacing
or upgrading components. These augmentations could substantially improve reliability and
sensitivity in comparison to a traditional single-phase LArTPC.
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Notes and Changes:
made public, it's a ref in the TDR
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