Search

Your search keyword '"SAITO, Hirobumi"' showing total 14 results
Start Over Author "SAITO, Hirobumi" Topic business
14 results on '"SAITO, Hirobumi"'

1. LET dependence of single event transient pulse-widths in SOI logic cell

Author

Makino, Takahiro, Kobayashi, Daisuke, Hirose, Kazuyuki, Yanagawa, Yoshimitsu, Saito, Hirobumi, Ikeda, Hirokazu, Takahashi, Daisuke, Ishii, Shigeru, Kusano, Masaki, Onoda, Shinobu, Hirao, Toshio, and Ohshima, Takeshi

Subjects
Logic circuitry -- Properties, Business, Electronics, Electronics and electrical industries
Abstract

Single event transient (SET) pulse-widths were measured as a function of linear energy transfer (LET) by using pulse capture circuits and simulated with mixed-mode 3-D device simulations. We found that the carrier recombination process dominates the LET dependence of the pulse-widths. Index Terms--Logic cell, single event transient, SOI.

Published
2009

2. Waveform observation of digital single-event transients employing monitoring transistor technique

Author

Kobayashi, Daisuke, Hirose, Kazuyuki, Yanagawa, Yoshimitsu, Ikeda, Hirokazu, Saito, Hirobumi, Ferlet-Cavrois, Veronique, McMorrow, Dale, Gaillardin, Marc, Paillet, Philippe, Arai, Yasuo, and Ohno, Morifumi

Subjects
Waveforms -- Analysis, Integrated circuits -- Analysis, Semiconductor chips -- Analysis, Standard IC, Business, Electronics, Electronics and electrical industries
Abstract

Waveforms of digital single-event transients, radiation-induced voltage transients in logic gates, can be observed by connecting two transistors to a target logic gate. Additional transistors monitor voltage transients through their drain currents, which can be measured using the conventional 50-[ohm] transmission-line technique widely used for measuring transient currents in single elementary transistors. Experimental results obtained in pulsed-laser irradiation tests demonstrate the validity of the observation technique and clearly reveal the pulse evolution as a function of the laser pulse energy. Index Terms--Integrated circuit radiation effects, pulsed laser irradiation, semiconductor device radiation effects, single event transients (SETs), soft errors, waveform observations.

Published
2008

3. Scan-architecture-based evaluation technique of SET and SEU soft-error rates at each flip-flop in logic VLSI systems

Author

Yanagawa, Yoshimitsu, Kobayashi, Daisuke, Ikeda, Hirokazu, Saito, Hirobumi, and Hirose, Kazuyuki

Subjects
Very-large-scale integration -- Analysis, Integrated circuits -- Analysis, Semiconductor chips -- Analysis, Standard IC, Business, Electronics, Electronics and electrical industries
Abstract

A scan flip-flop (FF) is designed to observe both single event transient (SET) and single event upset (SEU) soft errors in logic VLSI systems. The SET and SEU soft errors mean the upset caused by latching an SET pulse that originates in combinational logic blocks and the upset caused by a direct ion hit to the FF, respectively. An irradiation test method using the scan FF is proposed to obtain SET and SEU soft-error rates at each FF distributed in logic VLSI systems. A test chip is designed using a 0.2-[micro]m fully-depleted silicon-on-insulator standard cell library. The basic concepts have been validated with Verilog timing simulations. The cell-level implementation costs of the proposed scan FF are estimated to be reasonable. Index Terms--Integrated circuit radiation effects, irradiation test, logic VLSI system, scan architecture, single event transient, single event upset.

Published
2008

4. Feasibility study of a table-based SET-pulse estimation in logic cells from heavy-ion-induced transient currents measured in a single MOSFET

Author

Kobavashi, Daisuke, Hirose, Kazuyuki, Makino, Takahiro, Ikeda, Hirokazu, and Saito, Hirobumi

Subjects
Metal oxide semiconductor field effect transistors -- Properties, Metal oxide semiconductor field effect transistors -- Testing, Heavy ions -- Influence, Ionizing radiation -- Influence, Business, Electronics, Electronics and electrical industries
Abstract

A table-based technique for estimating single-event transient pulses is evaluated in the most crucial case for bulk MOSFET technologies where an ion penetrates the drain region. A device model of a bulk MOSFET is built in a 2-D numerical device simulation framework, and heavy-ion-induced transient currents flowing through its drain terminal are calculated. From the currents, single-event transient voltage pulses in an inverter are estimated with the table-based estimation technique. The results are compared with ones simulated in the mixed mode with the same device model and circuit configuration. The estimated are comparable to the results in the mixed-mode device simulations. Moreover, the estimation accuracy can be improved using a drain-capacitance compensation technique. An extrapolation technique based on the drain-voltage dependency of heavy-ion-induced transient currents is also presented to reduce the experimental costs for modeling. Index Terms--Graphical derivation, heavy ions, integrated circuit radiation effects, look-up table modeling, semiconductor device radiation effects, single event transients (SETs), transient currents.

Published
2007

5. Estimation of single event transient voltage pulses in VLSI circuits from heavy-ion-induced transient currents measured in a single MOSFET

Author

Kobayashi, Daisuke, Saito, Hirobumi, and Hirose, Kazuyuki

Subjects
Integrated circuits -- Analysis, Semiconductor chips -- Analysis, Metal oxide semiconductor field effect transistors -- Analysis, Standard IC, Business, Electronics, Electronics and electrical industries
Abstract

Described is an estimation technique of single event transient voltage pulses in VLSI circuits from heavy-ion-induced transient currents measured in a single MOSFET. Waveforms of the transient voltage pulses are fully estimated by using transient current data obtained in various drain voltage conditions. Modeling of the irradiated device behavior for use in device/circuit simulations is not required. The concept is validated using a 2-D mixed-mode device simulation. Index Terms--Estimation, graphical derivation, heavy ions, integrated circuit radiation effects, semiconductor device radiation effects, simulation, single event transients (SETs), transient currents, voltage pulses.

Published
2007

6. Time-domain component analysis of heavy-ion-induced transient currents in fully-depleted SOI MOSFETs

Author

Kobayashi, Daisuke, Aimi, Masahiro, Saito, Hirobumi, and Hirose, Kazuyuki

Subjects
Metal oxide semiconductor field effect transistors -- Research, Silicon-on-isolator -- Research, Heavy ions -- Atomic properties, Business, Electronics, Electronics and electrical industries
Abstract

Current components of heavy-ion-induced transient currents in a 0.2-[micro]m fully-depleted SOI MOSFET are analyzed in the time domain. The analysis demonstrates that the transient currents have another slow-decay current component that is different from the two conventional current components: a prompt discharge current and a slow-decay parasitic bipolar current. The slow-decay component revealed here is a flow of deposited carriers stored in the body region to maintain quasi-neutrality, and it drastically widens the transient pulse. Index Terms--Heavy ions, parasitic bipolar transistor, silicon on insulator (SOI) technology, single event transients, time domain analysis, transient currents.

Published
2006

7. Performance analysis of edge-feed rectangular parallel plate slot-array antenna panel for compact space-borne x-band sar system

Author

Pyne, Budhaditya, Ravindra, Vinay, Prilando Rizki, Akbar, Saito, Hirobumi, and HIROKAWA, JIRO

Subjects
Beam waveguide antenna, Physics, Coaxial antenna, business.industry, 020208 electrical & electronic engineering, Antenna measurement, 020206 networking & telecommunications, Slot antenna, 02 engineering and technology, Antenna factor, Antenna efficiency, Radiation pattern, law.invention, Optics, law, 0202 electrical engineering, electronic engineering, information engineering, Dipole antenna, business
Abstract

In this paper, we discuss the design scheme of a waveguide feeder for a wideband rectangular parallel plate slot-array antenna for a high resolution synthetic aperture radar sensor on-board a 100kg micro-satellite, scheduled to be launched in 2020. We analyze the performance of the edge-feed system with two waveguide feeders for each antenna panel. HFSS simulation results show that the edge-feed system reduces the undesired Poynting vector tilt in the parallel plate and achieves good antenna gain and efficiency with larger bandwidth, thereby giving it an edge over the conventional end-feed system However, the two-feeder antenna system increases the weight and active reflection and due to asymmetric design, phase opposition is difficult to achieve, thereby leading to structural complexity.

Published
2017

8. A Dual-Polarization $X$ -Band Traveling-Wave Antenna Panel for Small-Satellite Synthetic Aperture Radar

Author

Ravindra, Vinay, Akbar, Prilando Rizki, Zhang, Miao, Hirokawa, Jiro, Saito, Hirobumi, and Oyama, Akira

Subjects
Physics, Coaxial antenna, business.industry, Antenna measurement, Antenna aperture, 0211 other engineering and technologies, Turnstile antenna, 020206 networking & telecommunications, 02 engineering and technology, Traveling-wave antenna, Antenna factor, Radiation pattern, Optics, polarimetric synthetic aperture radar (SAR), slot antennas, 0202 electrical engineering, electronic engineering, information engineering, Electrical and Electronic Engineering, Antenna (radio), business, Linear antenna arrays, optimization, 021101 geological & geomatics engineering
Abstract

This paper investigated the possibility of using an $X$ -band traveling-wave antenna for application in synthetic aperture radar (SAR) on a small-satellite platform. A rectangular slotted parallel-plate antenna panel capable of radiating dual polarization over the same physical aperture was selected for this purpose. The design procedure, which provides for an optimal antenna pattern in a SAR application, is described. A meta-heuristic multiobjective optimization algorithm was applied to synthesize an appropriate far-field pattern, which enhances the quality of the SAR image. Subsequently, the optimization results were used to build a more realistic model of the antenna panel in electromagnetic simulation software. An antenna panel was fabricated, and its electrical characteristics were measured. The fabricated prototype weighed 1310 g and measurements showed nearly 50% aperture efficiency for both circular polarizations [34.6-dBic right-hand circular polarized (RHCP), 34.5-dBic left-hand circular polarized (LHCP), and peak gain at 9.65 GHz], with low side-lobes. A beam shift of 2.1° was observed between the RHCP and LHCP beams at the design center frequency and was later analyzed to be the result of an error in the modeling of the adhesive layer.

Published
2017

9. Design of a center-feed waveguide feeder for wideband rectangular parallel-plate slot-array antenna on-board space-borne X-band SAR system

Author

Pyne, Budhaditya, Akbar, Prilando, Saito, Hirobumi, Zhang, Miao, Jiro Hirokawa, Ando, Makoto, and IEEE

Subjects
Synthetic aperture radar, Engineering, HFSS, business.industry, Acoustics, 020208 electrical & electronic engineering, Bandwidth (signal processing), X band, 020206 networking & telecommunications, Slot antenna, 02 engineering and technology, Optics, 0202 electrical engineering, electronic engineering, information engineering, Power dividers and directional couplers, Standing wave ratio, Wideband, business
Abstract

In this paper, we aim to design a waveguide feeder for a parallel plate slot array antenna for a high resolution Synthetic Aperture Radar system on-board a 100 kg micro-satellite called Micro-XSAR, scheduled to be launched by Japan Aerospace Exploration Agency by 2020. In order to increase the antenna beam-width and thereby mitigate the frequency-dependent beam-shift, we employ center feeding using a two-way power divider named the τ-junction instead of the conventional end-feed design. Further, we re-model the t-junction by adding a pair of inductive walls to get double resonance instead of existing single resonance to significantly suppress reflection and hence substantially enhance the bandwidth. The HFSS simulation results show that by employing double resonance, we can increase the bandwidth upto 300 MHz thereby increasing our SAR image resolution from 3 meters to 1 meter which validates our innovative idea.

Published
2016

10. Cylindrical cavity microwave power combiner with microstrip line inputs and rectangular waveguide output

Author

Ravindra, Vinay, Saito, Hirobumi, Jiro Hirokawa, Zhang, Miao, and IEEE

Subjects
Physics, Optics, High power amplifier, business.industry, Amplifier, RF power amplifier, Microwave power, Bandwidth (signal processing), Electrical engineering, Insertion loss, Power dividers and directional couplers, business, Microstrip
Abstract

A compact microwave power combiner for combining output from six solid-state power amplifiers is studied. The combiner consists of 6 standard microstrip line inputs from high power amplifier, resonant cylindrical cavity and one standard rectangular waveguide output. The effect of input power amplifier failure is also studied and simulation results are described. Insertion loss of less than 0.3 dB over 200 MHz bandwidth in X-Band is simulated.

Published
2015

11. The space infrared telescope for cosmology and astrophysics: SPICA A joint mission between JAXA and ESA

Author

SWINYARD, Bruce, NAKAGAWA, Takao, MERKEN, Patrick, ROYER, Pierre, SOUVERIJNS, Tim, VANDENBUSSCHE, Bart, WAELKENS, Christoffel, DAVIS, Peter, DI FRANCESCO, James, HALPERN, Mark, HOUDE, Martin, JOHNSTONE, Doug, JONCAS, Gilles, NAYLOR, David, PLUME, Rene, SCOTT, Douglas, ABERGEL, A., BENSAMMAR, S., BRAINE, J., BUAT, V., BURGARELLA, D., CAIS, Ph., DOLE, H., DUBAND, L., ELBAZ, D., GERIN, M., GIARD, M., GOICOECHEA, J., JOBLIN, C., JONES, A., KNEIB, J. P., LAGACHE, Guilaine, MADDEN, S., PONS, R., PAJOT, F., RAMBAUD, D., RAVERA, L., RISTORCELLI, I., RODRIGUEZ, L., VIVES, S., ZAVAGNO, Annie, GEIS, Norbert, KRAUSE, Oliver, LUTZ, Dieter, POGLITSCH, Albrecht, RAAB, Walfried, STEGMAIER, Jutta, STURM, Eckhard, TUFFS, Richard, LEE, Hyung Mok, KOO, Bon-Chul, IM, Myungshin, PAK, Soojong, HAN, Wonyong, PARK, Jang-Hyun, NAM, Uk-Won, JIN, Ho, LEE, Dae-Hee, YUK, In-Soo, LEE, Sungho, AIKAWA, Yuri, ARIMOTO, Nobuo, DOI, Yasuo, ENYA, Keigo, FUKAGAWA, Misato, FURUSHO, Reiko, HASEGAWA, Sunao, HAYASHI, Masahiko, HONDA KANAGAWA, Mitsuhiko, IDA, Shigeru, IMANISHI, MASATOSHI, INUTSUKA, Shu-Ichiro, IZUMIURA, Hideyuki, KAMAYA, Hideyuki, KANEDA, Hidehiro, KASUGA, Toshihiro, KATAZA, Hirokazu, KAWABATA, Koji, KAWADA, Mitsunobu, KAWAKITA, Hideyo, KII, Tsuneo, KODA, Jin, KODAMA, Tadayuki, KOKUBO, Eiichiro, KOMATSU, Keiji, MATSUHARA, Hideo, MATSUMOTO, Toshio, MATSUURA, Shuji, MIYATA, Takashi, MIYATA, Murakam, NAGATA, Hirohisa, NAGATA, Tetsuya, NAKAJIMA, Tadashi, NAOTO, Kobayashi, NISHI, Ryoichi, NODA, Atsushi, OKAMOTO, Atsushi, OKAMOTO, Yoshiko K., OMUKAI, Kazuyuki, ONAKA, Takashi, OOTSUBO, Takafumi, OUCHI, Masami, SAITO, Hirobumi, SATO, Yoichi, SAKO, Shigeyuki, SEKIGUCHI, Tomohiko, SHIBAI, Hiroshi, SUGITA, Hiroyuki, SUGITANI, Koji, SUSA, Hajime, PYO, Tae-Soo, TAMURA, Motohide, UEDA, Yoshihiro, UENO, Munetaka, WADA, Takehiko, WATANABE, Jun'Ichi, YAMADA, Toru, YAMAMURA, Issei, YOSHIDA, Naoki, YOSHIMI, Kitamura, YUI, Yukari, BENEDETTINI, Milena, CERULLI, Riccardo, DI GIORGIO, Anna, MOLINARI, Sergio, ORFEI, Renato, PEZZUTO, Stefano, PIAZZO, Lorenzo, SARACENO, Paolo, SPINOGLIO, Luigi, DE GRAAUW, Thijs, DE KORTE, Piet, HELMICH, Frank, HOEVERS, Henk, HUISMAN, Robert, SHIPMAN, Russell, VAN DER TAK, Floris, VAN DER WERF, Paul, WILD, Wolfgang, ACOSTA-PULIDO, Jose, CERNICHARO, Jose, HERREROS, Jose, MARTIN-PINTADO, Jesus, NAJARRO, Francisco, PEREZ-FOURMON, Ismael, RAMON PARDO, Juan, GOMEZ, Francisca, CASTRO RODRIGUEZ, Nieves, ADE, Peter, BARLOW, Mike, CLEMENTS, David, FERLET, Marc, FRASER, Helen, GRIFFIN, Douglas, GRIFFIN, Matthew, HARGRAVE, Peter, ISAAK, Kate, IVISON, Robert, MANSOUR, Malik, LANIESSE, Jonathan, MAUSKOPF, Phillip, MOROZOV, Dmitry, OLIVER, Seb, ORLANDO, Angiola, PAGE, Mathew, POPESCU, Cristina, SERJEANT, Stephen, SUDIWALA, Rashmi, RIGOPOULOU, Dimitra, WALKER, Ian, WHITE, Glenn, VITI, Serena, WINTER, Berend, BOCK, Jamie, BRADFORD, Matt, HARWIT, Martin, HOLMES, Warren, Institut Méditerranéen d'Ecologie et de Paléoécologie (IMEP), Université Paul Cézanne - Aix-Marseille 3-Centre National de la Recherche Scientifique (CNRS)-Avignon Université (AU)-Université de Provence - Aix-Marseille 1, Institute of Atomic Physics, Université de Roumanie, Groundwater Tracing Unit, Department of Geological Sciences, School of Environmental Sciences [Norwich], University of East Anglia [Norwich] (UEA), Institut de Recherche en Immunologie et en Cancérologie [UdeM-Montréal] (IRIC), Université de Montréal (UdeM), Department of Zoology, University of Otago [Dunedin, Nouvelle-Zélande], Transplantation Biology Group, Imperial College London, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Observatoire de Paris - Site de Paris (OP), Centre National de la Recherche Scientifique (CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), FORMATION STELLAIRE 2009, Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux (L3AB), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB), Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Radioastronomie (LRA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Processus mentaux et activation cérébrale, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-IFR19-Institut National de la Santé et de la Recherche Médicale (INSERM), IFR des neurosciences de Lyon (IFNL), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier le Vinatier [Bron]-Hospices Civils de Lyon (HCL)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Centre d'étude spatiale des rayonnements (CESR), Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, British Antarctic Survey (BAS), Natural Environment Research Council (NERC), Department of Radio and Space Science [Göteborg], Chalmers University of Technology [Göteborg], Laboratoire Astrophysique de Toulouse-Tarbes (LATT), Centre National de la Recherche Scientifique (CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Services communs OMP (UMS 831), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée (DAPNIA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Solar Influences Data Analysis Center [Brussels] (SIDC), Royal Observatory of Belgium [Brussels] (ROB), Propriétés Optiques des Matériaux et Applications (POMA), Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Observatoire Astronomique de Marseille Provence (OAMP), Université de Provence - Aix-Marseille 1-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Department of Physiology, The University of Hong Kong (HKU), School of Environmental Systems Engineering (SESE), The University of Western Australia (UWA), Centre for Water Research (CWR), Macaulay Institute, Centre Science des Matériaux et des Structures (SMS-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), Département Mécanique et Procédés d'Elaboration (MPE-ENSMSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-SMS, Department of Obstetrics and Gynecology [Stanford], Stanford Medicine, Stanford University-Stanford University, Korea Astronomy and Space Science Institute (KASI), Okayama University, Jack Baskin School of Engineering (UCSC), University of California [Santa Cruz] (UCSC), University of California-University of California, Adobe Systems Inc. (Adobe Advanced Technology Labs), Adobe Systems Inc., Defence Evaluation and Research Agency (DERA), Ministry of Defence (UK) (MOD)-Propulsion and Performance Department, Centre for Air Transport and the Environment (CATE), Manchester Metropolitan University (MMU), Department of Chemistry, Williams Hall-Kent State University, School of Earth and Atmospheric Sciences [Atlanta], Georgia Institute of Technology [Atlanta], Department of Earth and Planetary Sciences [Kobe], Kobe University, National Institute of Agro-Environmental Sciences (NIAES), Department of Earth System Science and Technology [Fukuoka] (ESST), Kyushu University [Fukuoka], Tokyo Institute of Technology [Tokyo] (TITECH), Department of Information and Communication Engineering, Graduate School of Information Science and Technology-The University of Tokyo (UTokyo), Department of Physics and Earth Sciences, University of the Ryukyus [Okinawa], Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Center for Climate System Research [Kashiwa] (CCSR), The University of Tokyo (UTokyo), School of Humanities [Univ of Toyama], University of Toyama, Department of Mechanical System (Hiroshima University), Hiroshima University, High Temperature Plasma Center [Tokyo], Discrete Optimization Laboratory, Toyohashi University of Technology, Hatakeyama Laboratory, University of Electro-Communications [Tokyo] (UEC)-Tohoku University [Sendai], Institute of Industrial Science (IIS), Institut de génétique et biologie moléculaire et cellulaire (IGBMC), Université Louis Pasteur - Strasbourg I-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Science and Technology Research Center (MCC), Mitsubishi Chemical Corporation, Institute for Solid State Physics [Tokyo] (ISSP), University of Electro-Communications [Tokyo] (UEC), Faculty of Science and Engineering [Waseda], Waseda University, Department of Civil Engineering, Chuo University (Chuo University), Frontier Collaborative Research Center (FCRC), Istituto di Fisica dello Spazio Interplanetario (IFSI), Consiglio Nazionale delle Ricerche (CNR), Antarctic Research a European Network for Astrophysics (ARENA), Institut de biologie et chimie des protéines [Lyon] (IBCP), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), SRON Netherlands Institute for Space Research (SRON), Max-Planck-Institut für Radioastronomie (MPIFR), Departamento de Astrofísica Molecular e Infrarroja (DAMIR), Instituto de Estructura de la Materia (IEM), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centro de Investigaciones Biológicas (CSIC), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Laboratoire d'océanographie et de biogéochimie (LOB), Université de la Méditerranée - Aix-Marseille 2-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Ecosystèmes Littoraux et Cotiers, Université de Lille, Sciences et Technologies-Centre National de la Recherche Scientifique (CNRS), Royal Observatory Edinburgh (ROE), University of Edinburgh, Processus d'Activation Sélective par Transfert d'Energie Uni-électronique ou Radiatif (UMR 8640) (PASTEUR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Département de Chimie - ENS Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Ecole Supérieure des Affaires (ESA), Université Pierre Mendès France - Grenoble 2 (UPMF), Service de Neurologie [CHU Pitié-Salpêtrière], IFR70-CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Neurologie et thérapeutique expérimentale, Institut National de la Santé et de la Recherche Médicale (INSERM)-IFR70-Université Pierre et Marie Curie - Paris 6 (UPMC), Department of Physics, University of Wales, Engineering Department, University of Cambridge [UK] (CAM), SLAC National Accelerator Laboratory (SLAC), Stanford University, Université Paul Cézanne - Aix-Marseille 3-Université de Provence - Aix-Marseille 1-Avignon Université (AU)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales [Paris] (CNES), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire aquitain des sciences de l'univers (OASU), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Laboratoire d'Astrophysique de Bordeaux [Pessac] (LAB), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université de Lyon-Université de Lyon-Hospices Civils de Lyon (HCL)-Centre Hospitalier le Vinatier [Bron]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université d'Angers (UA)-Centre National de la Recherche Scientifique (CNRS), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), University of California [Santa Cruz] (UC Santa Cruz), University of California (UC)-University of California (UC), Kyushu University, Waseda University [Tokyo, Japan], National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Pierre et Marie Curie - Paris 6 (UPMC)-IFR70-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut de Recherche en Immunologie et en Cancérologie (IRIC), Université de Montréal [Montréal], PSL Research University (PSL)-PSL Research University (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), École normale supérieure - Paris (ENS Paris)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université de Cergy Pontoise (UCP), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Services communs OMP - UMS 831 (UMS 831), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Toulouse III - Paul Sabatier (UT3), Royal Observatory of Belgium [Brussels], Université de Franche-Comté (UFC)-Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Technologie de Belfort-Montbeliard (UTBM), Division of Reproductive Biology, Stanford University [Stanford], Okayama University [Okayama], Graduate School of Information Science and Technology-The University of Tokyo, The University of Tokyo, Department of linguistic [Toyama], Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), École normale supérieure - Paris (ENS Paris)-École normale supérieure - Paris (ENS Paris)-Centre National de la Recherche Scientifique (CNRS), Service de neurologie 1 [CHU Pitié-Salpétrière], Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Pitié-Salpêtrière [APHP], Stanford Linear Accelerator Center (SLAC), Astronomy, Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Université Fédérale Toulouse Midi-Pyrénées-Météo-France -Institut de Recherche pour le Développement (IRD)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), The University of Tokyo (UTokyo)-Graduate School of Information Science and Technology, Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Pitié-Salpêtrière [AP-HP], and Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Sorbonne Université (SU)

Subjects
[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Infrared telescope, UNIVERSE, Astrophysics, Spica, Astrophysics::Cosmology and Extragalactic Astrophysics, POLYCYCLIC AROMATIC-HYDROCARBON, 7. Clean energy, 01 natural sciences, Space missions, Cosmology, Space exploration, law.invention, STAR-FORMATION, 010309 optics, Telescope, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Spitzer Space Telescope, law, 0103 physical sciences, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Physics, Infrared astronomy, SPECTRUM, Spacecraft, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], SUBMILLIMETER GALAXIES, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, Astronomy and Astrophysics, MODEL, SPITZER, PAHS, Space and Planetary Science, Infrared, Physics::Space Physics, IR, Astrophysics::Earth and Planetary Astrophysics, business, EMISSION
Abstract

International audience; The Space Infrared telescope for Cosmology and Astrophysics (SPICA) is planned to be the next space astronomy mission observing in the infrared. The mission is planned to be launched in 2017 and will feature a 3.5 m telescope cooled to 30 microns wavelength). We describe the scientific advances that will be made possible by this large increase in sensitivity and give details of the mission, spacecraft and focal plane conceptual design.

Published
2009

12. A Gyrotron with a High Q Cavity for Plasma Scattering Diagnostics

Author

Danly, Bruce G., Mulligan, W. J., Temkin, R. J., Woskoboinikow, Paul, and Saito, Hirobumi

Subjects
Physics, Nuclear and High Energy Physics, Scattering, Thomson scattering, business.industry, Bandwidth (signal processing), Plasma, Condensed Matter Physics, law.invention, Nuclear magnetic resonance, Optics, law, Gyrotron, Plasma diagnostics, business, Electrical efficiency, Excitation
Abstract

A 137-GHz gyrotron with a high Q (~6000) cavity has been built and tested in short-pulse operation. Output power of 0.1-20 kW and efficiency of up to 26 percent were observed at 65-kV, 0.03-1.4-A operation in the TE031 mode. Frequency pulling of 2-kHz/V was measured. This small frequency pulling value indicates that a long pulse or CW gyrotron with high stability (

Published
1985

13. A Gyrotron with a Minimum Q Cavity

Author

Kreischer, K.E., Danly, B. G., Tran, T. M., Temkin, R. J., and Saito, Hirobumi

Subjects
Physics, business.industry, Electron, Radius, law.invention, Power (physics), Resonator, Wavelength, Optics, law, Gyrotron, Cathode ray, Reflection (physics), Electrical and Electronic Engineering, business
Abstract

In order to reduce the wall loading of a gyrotron cavity, a gyrotron with a minimum Q cavity is proposed and experimentally tested at 140 GHz. The minimum Q is defined as Qmin = 4π(L/λ)2, where L and λ are the effective cavity length and the wavelength. A non-linear uptaper, the radius of which gradually changes with respect to the axial direction, is used to minimize the reflection at the output taper of the open resonator. The detailed performance is investigated by means of self-consistent gyrotron theory. It is found that the electron beam significantly modifies the RF axial field profile in comparison with the cold cavity profile through the interaction between the electrons and the RF field. The maximum experimental efficiency of 37% is achieved at 150 kW and is compared with the results of self-consistent gyrotron theory. These theoretical and experimental results show the feasibility of the minimum Q cavity, especially for high power and high frequency gyrotrons.

Published
1986

14. The linear theory of the circular free-electron laser

Author

Wurtele, J. S. and Saito, Hirobumi

Subjects
Physics, business.industry, Wiggler, General Engineering, Free-electron laser, Laser, Instability, Magnetic field, law.invention, Optics, Negative mass, law, Dispersion relation, Cathode ray, Physics::Accelerator Physics, Atomic physics, business
Abstract

Accepted: 1987-04-06, 資料番号: SA1002145000

Published
1987

Catalog

Books, media, physical & digital resources
See catalog results