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Author (up) Babeluk, M. et al; Lacasta, C.; Marinas, C.; Mazorra de Cos, J.; Molina-Bueno, L.; Vobbilisetti, V. doi  openurl
  Title OBELIX: A monolithic pixel sensor with triggered readout for the Belle II upgrade Type Journal Article
  Year 2025 Publication Nuclear Instruments & Methods in Physics Research A Abbreviated Journal Nucl. Instrum. Methods Phys. Res. A  
  Volume 1080 Issue Pages 170654 - 4pp  
  Keywords Belle II; Vertex detector; VTX; DMAPS; Depleted monolithic active pixel sensor; OBELIX  
  Abstract The Upgrade of the Belle II vertex detector (VTX) at the SuperKEKB accelerator in Japan is foreseen to improve tracking performance at the expected high beam backgrounds at target luminosity of 6 x 1035 cm-2s-1. The OBELIX-1 chip is specifically developed for this purpose and used as sensor on all VTX layers. OBELIX-1 is a depleted monolithic active pixel sensor in 180 nm technology. The pixel matrix is inherited from TJ-Monopix2, but the periphery of the chip is entirely reworked. A newly designed 2-stage pixel memory matches Belle II trigger requirements. OBELIX-1 includes LDO regulators and a precision timing module with less than 3 ns resolution. Furthermore, the chip can also contribute to the Belle II trigger system with low latency, low granularity real-time streaming of pixel data in parallel to regular operation. Details of the inner working of the trigger memory are presented, as well as performance simulations to validate the requirements for the VTX Upgrade. The trigger memory has been studied in simulation using realistic scenarios, including Landau distributed charge and clustering to evaluate performance. In order to allow post-production testing, an additional module is presented. This allows the injection of pseudo-random data early in the processing chain, and replaces the need for industry standard scan-chains. It can be used stand-alone or during analog charge injection, in order to reach the full trigger memory during testing.  
  Address [Babeluk, M.; Bergauer, T.; Irmler, C.; Kaliyar, A. B.; Schwanda, C.] Austrian Acad Sci, Inst High Energy Phys, Nikolsdorfer Gasse 18, A-1050 Vienna, Austria; [Gaioni, L.; Re, V.; Riceputi, E.; Traversi, G.] Univ Bergamo, Dept Engn & Appl Sci, Viale Marconi 5, I-24044 Dalmine, BG, Italy; [Giroletti, S.; Ratti, L.] Univ Pavia, Dept Elect Comp & Biomed Engn, Via Ferrata 5, I-27100 Pavia, Italy; [Bettarini, S.; Casarosa, G.; Forti, F.; Massaccesi, L.; Mondal, S.; Rizzo, G.] Univ Pisa, Dipartimento Fis E Fermi, Lgo B Pontecorvo 3, I-56127 Pisa, Italy; [Bettarini, S.; Bosi, F.; Casarosa, G.; Corona, L.; Forti, F.; Gabrielli, A.; Massa, M.; Massaccesi, L.; Minuti, M.; Moggi, A.; Mondal, S.; Rizzo, G.] INFN, Sez Pisa, Lgo B Pontecorvo 3, I-56127 Pisa, Italy; [Barbero, M.; Barrillon, P.; Boudagga, R.; Breugnon, P.; Fougeron, D.; Pangaud, P.; Serrano, J.; Xu, D.] Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France; [Auguste, D.; Bonis, J.; Peinaud, Y.; Winter, M.] Univ Paris Saclay, Lab Phys 2 Infinis Irene Joliot Curie IJCLab, IJCLab, CNRS,IN2P3, F-91405 Orsay, France; [Baudot, J.; Bertolone, G.; Dorokhov, A.; Dujany, G.; Federici, L.; Himmi, A.; Hu-Guo, C.; Kumar, A.; Maushart, M.; Morel, F.; Pham, H.; Ripp-Baudot, I.; Sefri, R.; Stavroulakis, P.; Valin, I.] Univ Strasbourg, CNRS, UMR 7178, IPHC, F-67000 Strasbourg, France; [Bernlochner, F.; Bespin, C.; Dingfelder, J.; Kruger, H.; Schall, L.; Vogt, M.] Rhein Friedrich Wilhelms Univ Bonn, Phys Inst 2, Nussallee 12, D-53115 Bonn, Germany; [Karagounis, M.] Univ Appl Sci & Arts Dortmund, Sonnenstr 96-100, D-44139 Dortmund, Germany; [Buch, Y.; Frey, A.; Schwenker, B.; Schwickardi, M.] Georg August Univ Gottingen, Phys Inst 2, Friedrich Hund Pl 1, D-37077 Gottingen, Germany; [Hara, K.; Kishishita, T.; Nakamura, K. R.; Okazaki, Y.; Pilsl, B.] High Energy Accelerator Res Org KEK, Tsukuba 3050801, Japan; [Hara, K.; Jeans, D.; Nakamura, K. R.; Okazaki, Y.; Pilsl, B.] Grad Univ Adv Studies SOKENDAI, Hayama 2400193, Japan; [Higuchi, T.] Univ Tokyo, Kavli Inst Phys & Math Universe WPI, Kashiwa No Ha 5-1-5, Kashiwa 2778583, Japan; [Onuki, Y.; Wang, S.] Univ Tokyo, Dept Phys, Hongo 7-3-1, Tokyo 1130033, Japan; [Lacasta, C.; Marinas, C.; Cos, J. Mazorra de; Molina-Bueno, L.; Vobbilisetti, V.] CSIC UV, Inst Fis Corpuscular IFIC, Catedrat Jose Beltran 2, E-46980 Paterna, Spain; [Bevan, A.; Bona, M.; Howgill, D.] Queen Mary Univ London, Sch Phys & Chem Sci, Dept Phys & Astron, 327 Mile End Rd, London E1 4NS, England; [Finck, C.; Gao, X.; Gong, J.; Song, W.] Jilin Univ, Coll Phys, 2699 Qianjin St, Changchun, Jilin, Peoples R China; [Prieto, A. Fernandez; Torreira, A. Gallas] Univ Santiago De Compostela, Inst Galego Fis Altas Enerxias IGFAE 2010, Santiago De Compostela, Spain, Email: maximilian.babeluk@oeaw.ac.at  
  Corporate Author Thesis  
  Publisher Elsevier Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0168-9002 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:001566718100002 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6828  
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