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Author Real, D.; Calvo, D. doi  openurl
  Title Low-Resource Time-to-Digital Converters for Field Programmable Gate Arrays: A Review Type Journal Article
  Year 2024 Publication Sensors Abbreviated Journal Sensors  
  Volume 24 Issue 17 Pages 5512 - 15pp  
  Keywords time-to-digital converter; field-programmable gate array; low-resource time-to-digital converters  
  Abstract A fundamental aspect in the evolution of Time-to-Digital Converters (TDCs) implemented within Field-Programmable Gate Arrays (FPGAs), given the increasing demand for detection channels, is the optimization of resource utilization. This study reviews the principal methodologies employed for implementing low-resource TDCs in FPGAs. It outlines the foundational architectures and interpolation techniques utilized to bolster TDC performances without unduly burdening resource consumption. Low-resource Tapped Delay Line, Vernier Ring Oscillator, and Multi-Phase Shift Counter TDCs, including the use of SerDes, are reviewed. Additionally, novel low-resource architectures are scrutinized, including Counter Gray Oscillator TDCs and interpolation expansions using Process-Voltage-Temperature stable IODELAYs. Furthermore, the advantages and limitations of each approach are critically assessed, with particular emphasis on resolution, precision, non-linearities, and especially resource utilization. A comprehensive summary table encapsulating existing works on low-resource TDCs is provided, offering a comprehensive overview of the advancements in the field.  
  Address [Real, Diego; Calvo, David] Univ Valencia, IFIC Inst Fis Corpuscular, CSIC, C Catedrat Jose Beltran 2, Paterna 46980, Spain, Email: real@ific.uv.es  
  Corporate Author Thesis  
  Publisher Mdpi Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001311766100001 Approved no  
  Is ISI yes International Collaboration no  
  Call Number IFIC @ pastor @ Serial 6254  
Permanent link to this record
 

 
Author Punzi, G.; Baldini, W.; Bassi, G.; Contu, A.; Fantechi, R.; He, J.B.; Jashal, B.K.; Kotriakhova, S.; Lazzari, F.; Martinelli, M.; Mendoza, D.; Morello, M.J.; Oyanguren, A.; Pica, L.; Shi, Q.; Terzuoli, F.; Tuci, G.; Xu, A.; Zhuo, J.H. doi  openurl
  Title Detector-embedded reconstruction of complex primitives using FPGAs Type Journal Article
  Year 2024 Publication Nuclear Instruments & Methods in Physics Research A Abbreviated Journal Nucl. Instrum. Methods Phys. Res. A  
  Volume 1069 Issue Pages 169782 - 4pp  
  Keywords DAQ; FPGA; Trigger; LHCb  
  Abstract The slowdown of Moore's law and the growing requirements of future HEP experiments with ever-increasing data rates pose important computational challenges for data reconstruction and trigger systems, encouraging the exploration of new computing methodologies. In this work we discuss a FPGA-based tracking system, relying on a massively parallel pattern recognition approach, inspired by the processing of visual images by the natural brain (“retina architecture”). This method allows a large efficiency of utilisation of the hardware, low power consumption and very low latencies. Based on this approach, a device has been designed within the LHCb Upgrade-II project, with the goal of performing track reconstruction in the forward acceptance region in real-time during the upcoming Run 4 of the LHC. This innovative device will perform track reconstruction before the event-building, in a short enough time to provide pre-reconstructed tracks (“primitives”) transparently to the processor farm, as if they had been generated directly by the detector. This allows significant savings in higher-level computing resources, enabling handling higher luminosities than otherwise possible. The feasibility of the project is backed up by the results of tests performed on a realistic hardware prototype, that has been opportunistically processing actual LHCb data in parallel with the regular DAQ in the LHC Run 3.  
  Address [Baldini, Wander; Kotriakhova, Sofia] INFN, Sez Ferrara, Ferrara, Italy, Email: giovanni.punzi@cern.ch  
  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 (down) WOS:001309343100001 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6253  
Permanent link to this record
 

 
Author Castillo-Felisola, O.; Grez, B.; Olmo, G.J.; Orellana, O.; Perdiguero Garate, J. url  doi
openurl 
  Title Cosmological solutions in polynomial affine gravity with torsion Type Journal Article
  Year 2024 Publication European Physical Journal C Abbreviated Journal Eur. Phys. J. C  
  Volume 84 Issue 9 Pages 900 - 12pp  
  Keywords  
  Abstract The Polynomial Affine Gravity is an alternative gravitational model, where the interactions are mediated solely by the affine connection, instead of the metric tensor. In this paper, we explore the space of solutions to the field equations when the torsion fields are turned on, in a homogeneous and isotropic (cosmological) scenario. We explore various metric structures that emerge in the space of solutions.  
  Address [Castillo-Felisola, Oscar; Grez, Bastian] Univ Tecn Federico Santa Maria, Dept Fis, Casilla 110-V, Valparaiso, Chile  
  Corporate Author Thesis  
  Publisher Springer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1434-6044 ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001307826500001 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6251  
Permanent link to this record
 

 
Author Belle-II DEPFET and PXD Collaborations (Ahlburg, P. et al); Marinas, C. openurl 
  Title The new and complete Belle II DEPFET pixel detector: Commissioning and previous operational experience Type Journal Article
  Year 2024 Publication Nuclear Instruments & Methods in Physics Research A Abbreviated Journal Nucl. Instrum. Methods Phys. Res. A  
  Volume 1068 Issue Pages 169763 - 6pp  
  Keywords Belle II; DEPFET; Pixel detector; Vertex detector  
  Abstract The Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, has collected e+e- + e – collision data between 2019 and 2022. After reaching a record-breaking instantaneous luminosity of 4.71x1034 . 71x10 34 cm -2 s -1 and recording a dataset corresponding to 424 fb -1 , it completed its first planned long shutdown phase in December 2023. Aside from upgrades of the collider and detector maintenance, the shutdown was used for the installation of the two-layer Pixel VerteX Detector (PXD). As the innermost sub-detector, multiple scattering effects need to be reduced. PXD utilizes the Depleted P-channel Field Effect Transistor (DEPFET) technology, allowing for a material budget of 0.21% X0 0 per layer. Each of the tracker's 40 modules consists of an array of 250x768 pixels with a pitch ranging from 50 μmx 55 μm for the inner to 85 μmx 55 μm for the outer layer yielding high gain and high signal-to-noise ratio while retaining about 99% hit efficiency. This article discusses the experience of the 4-year operation of the previous single-layer PXD in harsh background conditions as well as commissioning and testing of the fully-populated PXD2 during Long Shutdown 1.  
  Address [Ahlburg, P.; Bernlochner, F.; Dingfelder, J.; Farkas, R.; Giakoustidis, G.; Khan, M.; Krueger, H.; Paschen, B.; Schmitz, J.; Wermes, N.] Univ Bonn, D-53115 Bonn, Germany, Email: jannes.schmitz@uni-bonn.de  
  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 (down) WOS:001306604900001 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6252  
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Author Vijande, J.; Carmona, V.; Lliso, F.; Ballester, F.; Perez-Calatayud, J. doi  openurl
  Title An efficient component of the redundancy calibration program to ensure equipment stability by assaying HDR Ir-192 sources at the time of replacement Type Journal Article
  Year 2024 Publication Journal of Applied Clinical Medical Physics Abbreviated Journal J. Appl. Clin. Med. Phys  
  Volume Issue Pages 5pp  
  Keywords brachytherapy  
  Abstract BackgroundBrachytherapy (BT) treatments involving temporary high-dose rate (HDR) sources are extensively employed in clinical practice. Ensuring the consistency of all measurement equipment at the hospital level is crucial, requiring a robust redundancy and consistency program. This enables the institution to verify the stability of the dosimetry system over time.PurposeTo describe, justify, and analyze a component of the redundancy program of the calibration protocols followed by the Radiotherapy Department of the Hospital Universitari i Polit & egrave;cnic La Fe (Val & egrave;ncia, Spain) during the last 10 years for the case of HDR BT as an additional component to ensure long term stability of the measurement equipment.MethodsAt the time the HDR BT source is replaced, its Air Kerma Strength (SK) is measured. By comparing this value with the one obtained at the time of installation (corrected by decay), a clear determination of the stability of the measurement equipment can be performed.ResultsDifference between SK,vendor and SK,hosp as a function of the measurement date is reported for a 10 years' period. All measurements are well within the +/- 3% tolerance level recommended in current international guidelines. Percentage differences of SK,hosp values at the time of replacement compared to SK,hosp ones at the time when the source was installed are within the +/- 0.5% range, reflecting oscillations around a null deviation.ConclusionsThe method proposed allows any hospital to ensure a redundancy component of the long-term stability of all equipment involved in BT measurements in a very simple and time efficient manner. Additionally, it enables the hospital to maintain a detailed log of historical differences, facilitating the identification and correction of potential systematic deviations over time.  
  Address [Vijande, Javier; Ballester, Facundo] Univ Valencia UV, Dept Fis Atom Mol & Nucl, Burjassot, Spain, Email: Javier.Vijande@uv.es  
  Corporate Author Thesis  
  Publisher Wiley Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1526-9914 ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001306138000001 Approved no  
  Is ISI yes International Collaboration no  
  Call Number IFIC @ pastor @ Serial 6250  
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Author Fu, B.W.; Ghoshal, A.; King, S.F.; Hossain Rahat, M. url  doi
openurl 
  Title Type-I two-Higgs-doublet model and gravitational waves from domain walls bounded by strings Type Journal Article
  Year 2024 Publication Journal of High Energy Physics Abbreviated Journal J. High Energy Phys.  
  Volume 08 Issue 8 Pages 237 - 25pp  
  Keywords Cosmology of Theories BSM; Early Universe Particle Physics; Multi-Higgs Models; Phase Transitions in the Early Universe  
  Abstract The spontaneous breaking of a U(1) symmetry via an intermediate discrete symmetry may yield a hybrid topological defect of domain walls bounded by cosmic strings. The decay of this defect network leads to a unique gravitational wave signal spanning many orders in observable frequencies, that can be distinguished from signals generated by other sources. We investigate the production of gravitational waves from this mechanism in the context of the type-I two-Higgs-doublet model extended by a U(1)R symmetry, that simultaneously accommodates the seesaw mechanism, anomaly cancellation, and eliminates flavour-changing neutral currents. The gravitational wave spectrum produced by the string-bounded-wall network can be detected for U(1)R breaking scale from 1012 to 1015 GeV in forthcoming interferometers including LISA and Einstein Telescope, with a distinctive f3 slope and inflexion in the frequency range between microhertz and hertz.  
  Address [Fu, Bowen] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, Shanghai 200240, Peoples R China, Email: bowen_fu@sjtu.edu.cn;  
  Corporate Author Thesis  
  Publisher Springer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1029-8479 ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001304494000002 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6244  
Permanent link to this record
 

 
Author Belle II VTX Collaboration (Babeluk, M. et al).; Marinas, C.; Mazorra de Cos, J. doi  openurl
  Title The DMAPS upgrade of the Belle II vertex detector Type Journal Article
  Year 2024 Publication Nuclear Instruments & Methods in Physics Research A Abbreviated Journal Nucl. Instrum. Methods Phys. Res. A  
  Volume 1064 Issue Pages 169428 - 5pp  
  Keywords Belle II; Belle II VTX; CMOS Pixel Sensor; Depleted Monolithic Active Pixel Sensor; DMAPS; Vertex detector; Radiation damage; Particle tracking detectors; Radiation-hard detectors  
  Abstract The Belle II experiment at KEK in Japan considers an upgrade for the vertex detector system in line with the accelerator upgrade for higher luminosity at long shutdown 2 planned for 2028. One proposal for the upgrade of the vertex detector called VTX aims to improve background robustness and reduce occupancy using small and fast pixels. VTX accommodates the OBELIX depleted monolithic active CMOS pixel sensor (DMAPS) on all five proposed layers. OBELIX is specifically developed for the VTX application and based on the TJ-Monopix2 chip initially developed to meet the requirements of the outer layers of the ATLAS inner tracker (ITk). This paper will review recent tests of the TJ-Monopix2 chip as well as various design aspects of the OBELIX-1 chip currently under development.  
  Address [Babeluk, M.; Bergauer, T.; Finck, C.; Irmler, C.] Austrian Acad Sci, Inst High Energy Phys, A-1050 Vienna, Austria, 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 (down) WOS:001304265000001 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6246  
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Author Yu, J.J.; Mollaebrahimi, A.; Ayet, S.; Dickel, T.; Plass, W.R.; Wilsenach, H.; Beck, S.; Ge, Z.; Geissel, H.; Hornung, C.; Jacobs, A.; Kripko-Koncz, G.; Kwiatkowski, A.A.; Narang, M.; Scheidenberger, C.; Sequeira, J.; Walls, C. doi  openurl
  Title A compact ion source combining electron-impact and thermal ionization for multiple-reflection time-of-flight mass spectrometry Type Journal Article
  Year 2024 Publication Review of Scientific Instruments Abbreviated Journal Rev. Sci. Instrum.  
  Volume 95 Issue 8 Pages 083309 - 7pp  
  Keywords  
  Abstract A compact ion source combining electron impact and thermal ionization has been developed and commissioned in two Multiple-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF-MS) setups at the Fragment Separator Ion Catcher at the GSI Helmholtz Centre for Heavy Ion Research, Darmstadt, Germany, and at TRIUMF's Ion Trap for Atomic and Nuclear science at TRIUMF Canada's particle accelerator center, Vancouver, Canada. The ion source is notable for its compact dimensions of 50 mm in height and 68 mm in diameter. The ion source is currently in daily operation at both facilities. Design, simulations, and results of combining ions from thermal and electron-impact ionization of different gases (perfluoropropane and sulfur hexafluoride) are presented in this work. The systematic effects of heating power on the thermal source were studied in detail. The source has demonstrated stable and long-term production of reference ions over a wide mass range for the MR-TOF-MS. This versatile ion source has also been used to optimize and investigate the transport of ions with different chemical reactivity and ionization potentials.  
  Address [Yu, Jiajun; Dickel, Timo; Plass, Wolfgang R.; Ge, Zhuang; Geissel, Hans; Hornung, Christine; Narang, Meetika; Scheidenberger, Christoph] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany, Email: j.yu@gsi.de  
  Corporate Author Thesis  
  Publisher AIP Publishing Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0034-6748 ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001302922200008 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6245  
Permanent link to this record
 

 
Author Araujo Filho, A.A.; Hassanabadi, H.; Reis, J.A.A.S.; Lisboa-Santos, L. url  doi
openurl 
  Title Fermions with electric dipole moment in curved space-time Type Journal Article
  Year 2024 Publication International Journal of Modern Physics A Abbreviated Journal Int. J. Mod. Phys. A  
  Volume 39 Issue 19n20 Pages 2450078 - 16pp  
  Keywords Fermions; curved spacetime; electric dipole momentum; thermodynamics  
  Abstract This paper explores the relativistic behavior of spin-half particles possessing an Electric Dipole Moment (EDM) in a curved space-time background induced by a spiral dislocation. A thorough review of the mathematical formulation of the Dirac spinor in the framework of quantum field theory sets the foundation for our investigation. By deriving the action that governs the interaction between the spinor field, the background space-time, and an external electric field, we establish a framework to study the dynamics of the system. Solving the resulting wave equation reveals a set of coupled equations for the radial components of the Dirac spinor, which give rise to a modified energy spectrum attributed to the EDM. To validate our findings, we apply them to the geometric phase and thermodynamics.  
  Address [Araujo Filho, A. A.] Univ Valencia, Ctr Mixto Univ Valencia, CSIC, Dept Fis Teor, Valencia 46100, Spain, Email: dilto@fisica.ufc.br;  
  Corporate Author Thesis  
  Publisher World Scientific Publ Co Pte Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0217-751x ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001302405200007 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6243  
Permanent link to this record
 

 
Author Ochoa-Oregon, S.A.; Renteria-Estrada, D.F.; Hernandez-Pinto, R.J.; Sborlini, G.F.R.; Zurita, P. url  doi
openurl 
  Title Using analytic models to describe effective PDFs Type Journal Article
  Year 2024 Publication Physical Review D Abbreviated Journal Phys. Rev. D  
  Volume 110 Issue 3 Pages 036019 - 12pp  
  Keywords  
  Abstract Parton distribution functions play a pivotal role in hadron collider phenomenology. They are nonperturbative quantities extracted from fits to available data, and their scale dependence is dictated by the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution equations. In this article, we discuss machineassisted strategies to efficiently compute parton distribution functions (PDFs) explicitly incorporating the scale dependence. Analytical approximations to the PDFs as functions of x and Q2, including up to next-to-leading-order effects in quantum chromodynamics, are obtained. The methodology is tested by reproducing the HERAPDF2.0 set and implementing the analytical expressions in benchmarking codes. It is found that the computational time cost of evaluating the distributions is reduced by similar to 50%, while the precision of the simulations stays well under control.  
  Address [Ochoa-Oregon, S. A.; Hernandez-Pinto, R. J.] Univ Autonoma Sinaloa, Fac Ciencias Fisicomatemat, Ciudad Univ, Culiacan 80000, Sinaloa, Mexico  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2470-0010 ISBN Medium  
  Area Expedition Conference  
  Notes (down) WOS:001302041300004 Approved no  
  Is ISI yes International Collaboration yes  
  Call Number IFIC @ pastor @ Serial 6237  
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