Study of Space Charge Effects in MicroBooNE

MicroBooNE,

doi:10.2172/1573050

Cited by 13 publications

(29 citation statements)

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“…Effects of space charge have been studied in calorimeters using liquid krypton [5] and liquid argon [6,7]. More recently, the relevance and the scope of this subject have widened with the development of large liquid argon imaging devices [8][9][10][11][12], where the drift volume may be long enough to become sensitive to the space charge due just to the exposure to cosmic rays at the surface of the Earth.…”

Section: Introductionmentioning

confidence: 99%

Space charge in liquid argon time-projection chambers: a review of analytical and numerical models, and mitigation methods

Palestini¹,

Resnati²

2021

J. Inst.

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The subject of space charge in ionisation detectors is reviewed, with particular attention to the case of liquid argon time projection chambers. Analytical and numerical description of the effects on the reconstructed coordinates along the drift and the transverse directions are presented. The cases of limited electron lifetime, of dual-phase detectors with ion feedback, and of detectors with small and comparable ratio between drift length and width are considered. Two design solutions that mitigates the effects are discussed.

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Section: Introductionmentioning

confidence: 99%

Space charge in liquid argon time-projection chambers: a review of analytical and numerical models, and mitigation methods

Palestini¹,

Resnati²

2021

J. Inst.

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“…Figure 23 shows the reconstructed 𝜋 0 mass in simulation for the fully contained 𝜈 𝜇 CC 𝜋 0 selection. Here, the fully contained events are defined to be events with the reconstructed TPC activity fully contained within the fiducial volume (3 cm inside the effective TPC boundary [22], which is the corrected boundary that takes a space charge effect [31,52] into account). Compared to the earlier MicroBooNE results [53], the resolution of the reconstructed 𝜋 0 mass is improved by about 15%.…”

Section: Neutral Pion Reconstructionmentioning

confidence: 99%

Wire-cell 3D pattern recognition techniques for neutrino event reconstruction in large LArTPCs: algorithm description and quantitative evaluation with MicroBooNE simulation

Abratenko¹,

An²,

Anthony³

et al. 2022

J. Inst.

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Wire-Cell is a 3D event reconstruction package for liquid argon time projection chambers. Through geometry, time, and drifted charge from multiple readout wire planes, 3D space points with associated charge are reconstructed prior to the pattern recognition stage. Pattern recognition techniques, including track trajectory and dQ/dx (ionization charge per unit length) fitting, 3D neutrino vertex fitting, track and shower separation, particle-level clustering, and particle identification are then applied on these 3D space points as well as the original 2D projection measurements. A deep neural network is developed to enhance the reconstruction of the neutrino interaction vertex. Compared to traditional algorithms, the deep neural network boosts the vertex efficiency by a relative 30% for charged-current νe interactions. This pattern recognition achieves 80–90% reconstruction efficiencies for primary leptons, after a 65.8% (72.9%) vertex efficiency for charged-current νe (νμ) interactions. Based on the resulting reconstructed particles and their kinematics, we also achieve 15-20% energy reconstruction resolutions for charged-current neutrino interactions.

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“…. 82 5.4 The sequential mapping procedure. A hypothesis for the kinetic energy at the end of a track T e is mapped to a range value R i using the mapping M. A hypothesis for the total range ∆R maps R e to R i , which in turn is mapped to T i .…”

Section: 13mentioning

confidence: 99%

“…The distortion of the electric field due to these positive ions in turn distorts the reconstructed trajectories of tracks within the detector by up to 10 cm. These effects are referred to as 'space charge effects' (SCE) [82]. An example of the effect of space charge effects on the reconstructed endpoints of cosmic ray tracks is shown in Figure 3.14.…”

Section: Space Charge Effectsmentioning

confidence: 99%

“…• Space charge effects (SCE) [82,99]: the large amount of cosmic rays causes an accumulation of positive argon ions, which distort the uniformity of the electric field by affecting its magnitude and direction. Changes in the electric field affect both the recombination effect and the reconstructed trajectories of particles, effectively contracting near the cathode leading to smaller reconstructed dx values, which increases the measured value of dQ/dx;…”

Section: Proton Pidmentioning

confidence: 99%

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Identifying Muon Neutrino Charged-Current Interactions in the MicroBooNE Detector

Vries

2019

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I would like to start by thanking the Cambridge Trust for generously awarding me a European Scholarship and enabling me to pursue this degree. In addition, I would particularly like to thank my parents, Thea and Alexander, and my girlfriend, Amy, without whose support this thesis would never have been completed. I will be eternally grateful for your endless encouragement: I could not have done this without you. I am also grateful to Mark Thomson and John Marshall, for their teaching and guidance. A special mention goes out to Lorena Escudero-Sanchez, who always made time to offer words of wisdom and support, and who has done endless proofreading. Thanks also to Leigh Whitehead, for supplying advice when it was most needed. Lastly, I was fortunate to share my PhD with excellent co-students: thank you Jack, Steven, Bono, Andy and Stefano for making this experience infinitely more enjoyable. Table of contents List of figures xiii List of tables xxvii 8 Conclusion 185 References 189

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Study of Space Charge Effects in MicroBooNE

Cited by 13 publications

References 0 publications

Space charge in liquid argon time-projection chambers: a review of analytical and numerical models, and mitigation methods

Space charge in liquid argon time-projection chambers: a review of analytical and numerical models, and mitigation methods

Wire-cell 3D pattern recognition techniques for neutrino event reconstruction in large LArTPCs: algorithm description and quantitative evaluation with MicroBooNE simulation

Identifying Muon Neutrino Charged-Current Interactions in the MicroBooNE Detector

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