Construction of precision wire readout planes for the Short-Baseline Near Detector (SBND)
R. Acciarri, C. Adams, C. Andreopoulos, J. Asaadi, M. Babicz, C. Backhouse, W. Badgett, Linda Bagby, D. Barker, C. Barnes, A. Basharina-Freshville, V. Basque, A. Baxter, M. C. Q. Bazetto, O. Beltramello, M. Betancourt, A. Bhanderi, A. Bhat, M. Bishai, A. Bitadze, A. Blake, J. Boissevain, C. Bonifazi, Julia Book, D. Brailsford, A. Brandt, J. Bremer, T. Brooks, B. A. Bullard, L. Camilleri, M. F. Carneiro, R. Castillo Fernández, M. Chalifour, Y. Chen, H. Chen, G. Chisnall, D. Cianci, J. I. Crespo-Anadón, E. Cristaldo, C. Cuesta, I. L. De Icaza Astiz, A. De Roeck, G. Pereira, G. De Souza, S.R. Dennis, L. Di Giulio, Simon Dixon, A. Elvin, A. Ereditato, J. J. Evans, A. C. Ezeribe, C. Fabre, J. Farrell, R. S. Fitzpatrick, B. T. Fleming, N. Foppiani, W. Foreman, D. Franco, J. Freestone, A. P. Furmanski, T. Gamble, S. Gao, D. García-Gámez, M.P. Garman, Heriques Frandini Gatti, G. Ge, I. Gil‐Botella, S. Gollapinni, O. Goodwin, P. Green, W. C. Griffith, R. Guénette, P. Guzowski, P. Hamilton, Steve Hentschel, Clive Hill, A. Holin, S. S. Holt, J. Hrivnak, E.-C. Huang, C.C. James, Julie Y. Ji, R. Jones, Y.-J. Jwa, G. Karagiorgi, E. Kemp, M.J. Kim, U. Köse, I. Kreslo, S. Kubecki, V. A. Kudryavtsev, B. Lacarelle, M. Langstaff, Jeff Larkin, R. LaZur, I. Lepetic, B. R. Littlejohn, D. Lorca, W. C. Louis, A.A. Machado
Abstract
The Short-Baseline Near Detector time projection chamber is unique in the design of itscharge readout planes. These anode plane assemblies (APAs) have been fabricated and assembled tomeet strict accuracy and precision requirements: wire spacing of 3 mm±0.5 mm and wire tensionof 7 N±1 N across 3,964 wires per APA, and flatness within 0.5 mm over the 4 m×2.5 m extentof each APA. This paper describes the design, manufacture and assembly of these key detectorcomponents, with a focus on the quality assurance at each stage.