Journal of Instrumentation最新文献

{"title":"Simulation study of total ionizing dose effect of gamma radiation on 15 nm bulk FinFET","authors":"J.Q. Fan, T.H. Hou, Q. Zhao, F. Zhang, K. Li, J. Fang, J.H. Hao, Z.W. Dong","doi":"10.1088/1748-0221/18/10/p10027","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10027","url":null,"abstract":"Abstract FinFET is a new mainstream semiconductor device that is widely used in space applications. This paper studies the effects of radiation damage typically encountered in space applications by simulating the effects of total ionizing dose (TID) from 0 to 1 Mrad on a 15 nm n-type bulk FinFET. In particular we have simulated the effects of radiation damage on the transfer characteristic curve, threshold voltage and subthreshold swing of the FinFET. We have also varied some device process parameters such as gate length, fin width and fin height in order to assess their impact on the device susceptibility to radiation damage and our results show that the device structure with longer gate length, wider fin width and taller fin height have better performance. In addition, the higher channel doping concentration, the use of SiO 2 in the gate, and the low device operating temperature can also effectively reduce the TID effects.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136169169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conceptual study of a Compton polarimeter for the upgrade of the SuperKEKB collider with a polarized electron beam","authors":"D. Charlet, T. Ishibashi, A. Martens, M. Masuzawa, F. Mawas, Y. Peinaud, D. Zhou, F. Zomer","doi":"10.1088/1748-0221/18/10/p10014","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10014","url":null,"abstract":"Abstract The physics scope of the Belle II experiment currently acquiring data at the SuperKEKB collider will expand with a polarized electron beam upgrade, as recently proposed. Among the required elements for this upgrade, a real time diagnosis of the polarization is necessary to ensure it is large for all bunches in the accelerator during its regular operation. This will be realized by inserting a Compton polarimeter in the accelerator. Its conceptual design is described and no show-stopper for its integration has been identified. An estimation of the sensitivity of the polarimeter is made by means of toy Monte-Carlo studies. The proposed design accounts for the constraint to preserve the performance of the SuperKEKB accelerator and to cope with the short time separation of successive bunches. We show that the polarimeter will measure for each bunch the polarization within five minutes with a statistical precision below 1% and systematic uncertainties below 0.5%. It has the capability of providing this information online on a similar timescale. This work paves the way towards future implementation of real-time Compton polarimetry in several future projects.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135809846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Treating detector systematics via a likelihood free inference method","authors":"L. Fischer, R. Naab, A. Trettin","doi":"10.1088/1748-0221/18/10/p10019","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10019","url":null,"abstract":"Abstract Estimating the impact of systematic uncertainties in particle physics experiments is challenging, especially since the detector response is unknown analytically in most situations and needs to be estimated through Monte Carlo (MC) simulations. Typically, detector property variations are parameterized in ways that implicitly assume a specific physics model, which can introduce biases on quantities measured by an analysis. In this paper, we present a method to recover a model-independent, event-wise estimation of the detector response variation by applying a likelihood-free inference method to a set of MC simulations representing discrete detector realizations. The method provides a re-weighting scheme for every event, which can be used to apply the effects of detector property variations fully decoupled from the assumed physics model. Using a toy MC example inspired by fixed-baseline neutrino oscillation experiments, we demonstrate the performance of our method. We show that it fully decouples the modeling of the detector response from the physics parameters to be measured in a MC forward-folding analysis.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135849976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design optimization of a Dual-Interlocked-Cell in 65 nm CMOS tolerant to Single Event Upsets","authors":"F. Márquez, F.R. Palomo, F. Muñoz, D. Fougeron, M. Menouni","doi":"10.1088/1748-0221/18/10/p10023","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10023","url":null,"abstract":"Abstract Dual-Interlocked-Cell (DICE) latches are tolerant to Single Event Effects (SEE) by design owing to intrinsic redundancy. In nanometric technologies, as in the 65 nm scale, there are new SEE vulnerabilities associated with charge sharing between nodes. Herein we present a systematic analysis of the robustness against radiation using a simulation software tool for analog and mixed-signal circuits (AFTU) that emulates the possible effects generated by particle impacts. In this paper, we evaluate the influence of SEE on circuit performance using this tool as an RHbD assessment for designers. An exhaustive study of the possible vulnerabilities of the DICE architecture is performed, including an evaluation of the proximity between critical nodes at the layout level. As a result, we propose several modifications to the cell implementation to optimize its robustness against Single Event Upsets (SEU). An assortment of five designs with different variations of the original DICE scheme was sent for fabrication on a new chip and tested under ion beams, with promising results showing a clear improvement in the SEU sensitivity of the cell. The best results come from a redesign of the load circuitry to avoid a SET2SEU effect and full interleaved layout to avoid charge sharing effects after a single event.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135921933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linear approximation to the statistical significance autocovariance matrix in the asymptotic regime","authors":"V. Ananiev, A.L. Read","doi":"10.1088/1748-0221/18/10/p10018","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10018","url":null,"abstract":"Abstract Approximating significance scans of searches for new particles in high-energy physics experiments as Gaussian fields is a well-established way to estimate the trials factors required to quantify global significances. We propose a novel, highly efficient method to estimate the covariance matrix of such a Gaussian field. The method is based on the linear approximation of statistical fluctuations of the signal amplitude. For one-dimensional searches the upper bound on the trials factor can then be calculated directly from the covariance matrix. For higher dimensions, the Gaussian process described by this covariance matrix may be sampled to calculate the trials factor directly. This method also serves as the theoretical basis for a recent study of the trials factor with an empirically constructed set of Asmiov-like background datasets. We illustrate the method with studies of a H → γγ inspired model that was used in the empirical paper.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135849807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Realization and simulations of the new SPES Beam Cooler","authors":"A. Ruzzon, M. Maggiore, C. Roncolato, G. Ban, J.F. Cam, C. Gautier, C. Vandamme","doi":"10.1088/1748-0221/18/10/p10031","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10031","url":null,"abstract":"Abstract One of the aim of the new project Selective Production of Exotic Species (SPES) is to produce and select new, neutron reach, isotopes [1,2,3,4]. The technique adopted to produce these species is the Isotope Selection On Line (ISOL) that postpones the separation of the isotopes after the beam production, using a High-Resolution Mass Spectrometer (HRMS). In order to allow a good separation of isotopes , the transverse emittance and the energy spread of the beam should have very low values, for this reason the Beam Cooler (BC) is located between the ISOL target, i.e. the beam source, and the HRMS. In the SPES project, where heavy isotopes are expected (mass number >100), the spectrometer resolution must be preferably higher than dm/m = 5 × 10 -5 and thus the features of the beam at the entrance of the HRMS should be at least ε n 95% < 8.3 × 10 -3 π mm mrad and σ E < 1.5 eV. BC devices are devoted to improve the beam features in terms of emittance and energy spread. A new BC has been designed and realized by the Laboratoire de Physique Corpuscolaire (LPC) at Caen, France, for the SPES facility at Laboratori Nazionali di Legnaro (LNL), near Padova, Italy. BCs cool down the beam thanks to a dissipative process in which the thermal energy passes from the beam ions to another medium whose constituent is typically much lighter, Helium gas in our case. This process takes place inside a confinement system that on the one hand to limit the spread of the cooling medium, and on the other to allow the beam to continue along the required trajectory, in the presented device it is a row of radio frequency quadrupoles in an almost closed chamber. Some specifications of the BC described in this document: the RFQ is 723 mm long, its internal radius is 5 mm; the RFQ is included in the gas chamber which is 730 mm×280 mm×220 mm. Before it there is the injection part composed by, following the beam trajectory, a grounded pipe (388 mm long) and three focusing electrodes. On the opposite side there is the extraction part with two focusing electrodes. This document presents the main features of the new BC together with the results of a preliminary study where the beam dynamic has been simulated. The analysis embeds also the investigation of the gas distribution inside and outside the BC. The beam dynamic simulations are based on the Simion code [5] while the estimation of the gas distribution is computed with MolFlow+ [6]. Simulations show that accurately setting the BC leads to a large improvement of the emittance while the energy spread still needs to be improved. Limiting the gas pressure in the acceleration zone seems to allow the required final boost.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136093092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An ultra-light helium cooled pixel detector for the Mu3e experiment","authors":"Thomas Theodor Rudzki, Heiko Augustin, David Maximilian Immig, Ruben Kolb, Lukas Mandok","doi":"10.1088/1748-0221/18/10/c10022","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/c10022","url":null,"abstract":"The Mu3e experiment searches for the lepton flavour violating decay μ + → e + e - e + with a target sensitivity of 1 event in 1016 decays. To achieve this goal, the experiment must minimize the material budget. The pixel detector uses High-Voltage Monolithic Active Pixel Sensors (HV-MAPS) which are thinned down to 50 μm. Combined with gaseous helium as low density coolant, this results in only X/X 0 ≈ 0.1% per tracking layer. Both helium cooling and HV-MAPS are a novelty for particle physics experiments. Here, the work on successfully cooling a pixel tracker using gaseous helium, and performance data of the final HV-MAPS used by Mu3e, the MuPix11, is presented. The thermal studies focus on the two inner tracking layers, the Mu3e vertex detector, and the first operation of a functional thin pixel detector cooled with gaseous helium. Miniature turbo compressors are found to be sufficient to cool thin silicon pixel detectors at heat densities of up to 350 mW/cm2. The presented results demonstrate the feasibility of using HV-MAPS combined with gaseous helium as a coolant for an ultra-thin pixel detector exploring new frontiers in lepton flavor.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136094043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design considerations for an ultrahigh-bandwidth Phase Contrast Imaging system applied to fusion grade devices","authors":"A. Marinoni, J.C. Rost, M. Porkolab","doi":"10.1088/1748-0221/18/10/c10005","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/c10005","url":null,"abstract":"The PCI diagnostic is an internal reference interferometer that creates an image of absolutely calibrated electron density fluctuations integrated along the line of sight of the probing light beam. While conventional PCI diagnostics installed on fusion experiments worldwide employ light of wavelength equal to 10.59 $mu$~m, the same system using light at 1.55 $mu$~m wavelength would extend the spectral response in wave-number and frequency by factors of seven and over one hundred, respectively, thereby potentially providing quantitative measurements of the internal structure of density perturbations induced by either turbulent or radio-frequency waves, simultaneously covering ion to electron gyro-radius scales up to the GHz frequency region. Based on a previously developed 1.55 $mu$~m PCI prototype system, constraints to the design for such a diagnostic in fusion grade devices are presented and compared to those faced with the conventional method.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135760864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clustering fusion algorithm for selection of historical beam steady-state transmission data in CAFe facility","authors":"Z.G. Cao, Y.H. Guo, X.H Yang, C.M. Yan, M.Y. Hou","doi":"10.1088/1748-0221/18/10/p10013","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/p10013","url":null,"abstract":"Abstract Accelerator-driven systems (ADS) are promising technologies for nuclear waste transmutation and energy production. The China ADS Front-end Superconducting Demo Linac (CAFe) is a prototype of the China Initiative Accelerator Driven System (CiADS), which aims to verify the feasibility of key technologies of CiADS. In this article, a novel method for historical data screening of the beam transport in the medium energy beam transport (MEBT) section of CAFe is presented. A clustering fusion algorithm based on unsupervised learning and beam transmission characteristics is designed to extract a large number of samples with the beam in steady-state transmission from historical beam data. A deep neural network model was constructed to fit the beam transport characteristics and verify the reliability of the screened data samples. The method can improve the efficiency and accuracy of data analysis and provide valuable insights for the optimization and control of beam transport in CAFe.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135809696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A search for a muon to electron conversion in COMET","authors":"Yuki Fujii","doi":"10.1088/1748-0221/18/10/c10010","DOIUrl":"https://doi.org/10.1088/1748-0221/18/10/c10010","url":null,"abstract":"Abstract The COMET experiment at J-PARC, Japan, aims to search for muon to electron conversion with aluminium nuclei, achieving a sensitivity four orders of magnitude higher than the current upper limit at a 90% confidence level. The proton beam line has recently been completed, and muons have been successfully transported through the curved solenoid in the Phase-alpha of the experiment. In this paper, we will present preliminary results from the Phase-alpha beam measurement, the status of the intermediate sensitivity experiment (COMET Phase-I), and the ultimate goal of COMET Phase-II.","PeriodicalId":16184,"journal":{"name":"Journal of Instrumentation","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135849813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}