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Stabilization of a high-order harmonic generation seeded extreme ultraviolet free electron laser by time-synchronization control with electro-optic sampling

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High Power Laser Science and Engineering 2015年第2期3卷 1-10页

作者： H.Tomizawa T.Sato K.Ogawa K.Togawa T.Tanaka T.Hara M.Yabashi H.Tanaka T.Ishikawa T.Togashi S.Matsubara Y.Okayasu T.Watanabe E.j.takahashi K.Midorikawa M.Aoyama K.Yamakawa S.Owada A.Iwasaki K.Yamanouchi RIKEN SPring-8 Center japan Synchrotron Radiation Research Institute RIKEN Center for Advanced Photonics japan Atomic Energy Agency The University of Tokyo

A fully coherent free electron laser(FEL) seeded with a higher-order harmonic(HH) pulse from high-order harmonic generation(HHG) is successfully operated for a sufficiently prolonged time in pilot user experiments by using a timing drift feedback. For HHG-seeded FELs, the seeding laser pulses have to be synchronized with electron bunches. Despite seeded FELs being non-chaotic light sources in principle, external laser-seeded FELs are often unstable in practice because of a timing jitter and a drift between the seeding laser pulses and the accelerated electron bunches. Accordingly,we constructed a relative arrival-timing monitor based on non-invasive electro-optic sampling(EOS). The EOS monitor made uninterrupted shot-to-shot monitoring possible even during the seeded FEL operation. The EOS system was then used for arrival-timing feedback with an adjustability of 100 fs for continual operation of the HHG-seeded FEL. Using the EOS-based beam drift controlling system, the HHG-seeded FEL was operated over half a day with an effective hit rate of 20%–30%. The output pulse energy was 20 μj at the 61.2 nm wavelength. Towards seeded FELs in the water window region, we investigated our upgrade plan to seed high-power FELs with HH photon energy of 30–100 e V and lase at shorter wavelengths of up to 2 nm through high-gain harmonic generation(HGHG) at the energy-upgraded SPring-8Compact SASE Source(SCSS) accelerator. We studied a benefit as well as the feasibility of the next HHG-seeded FEL machine with single-stage HGHG with tunability of a lasing wavelength.

关键词： arrival-timing monitor electro-optic sampling(EOS)

A Custom-Tailored Multi-TW Optical Electric Field for Gigawatt Soft-X-Ray Isolated Attosecond Pulses

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Ultrafast Science 2021年第1期1卷 48-60页

作者： Bing Xue Yuuki Tamaru Yuxi Fu Hua Yuan Pengfei Lan Oliver D.Mücke Akira Suda Katsumi Midorikawa Eiji j.takahashi RIKEN Center for Advanced Photonics RIKEN2-1 HirosawaWakoSaitama 351-0198Japan Tokyo University of Science 2641 YamazakiNoda-shiChiba-ken 278-8510Japan School of Physics and Wuhan National Laboratory of Optoelectronics Huazhong University of Science and TechnologyWuhanHubei 430074China Center for Free-Electron Laser Science CFEL Deutsches Elektronen-Synchrotron DESYNotkestraße 8522607 HamburgGermany

Since the first isolated attosecond pulse was demonstrated through high-order harmonics generation(HHG)in 2001,researchers’interest in the ultrashort time region has ***,one realizes a limitation for related research such as attosecond *** bottleneck is concluded to be the lack of a high-peak-power isolated attosecond pulse ***,currently,generating an intense attosecond pulse would be one of the highest priority *** this paper,we review our recent work of a TW-class parallel three-channel waveform synthesizer for generating a gigawatt-scale soft-X-ray isolated attosecond pulse(IAP)using *** employing several stabilization methods,we have achieved a stable 50 mj three-channel opticalwaveform synthesizer with a peak power at the multi-TW *** optical-waveform synthesizer is capable of creating a stable intense optical field for generating an intense continuum harmonic beam thanks to the successful stabilization of all the ***,the precision control of shot-to-shot reproducible synthesized waveforms is *** the HHG process employing a loose-focusing geometry,an intense shot-to-shot stable supercontinuum(50–70 eV)is generated in an argon gas *** continuum spectrum supports an IAP with a transform-limited duration of 170 as and a submicrojoule pulse energy,which allows the generation of a GW-scale *** supercontinuum in the soft-X-ray region with higher photon energy of approximately 100–130 eV is also generated in neon gas from the *** transform-limited pulse duration is 106 ***,the enhancement of HHG output through optimized waveform synthesis is experimentally proved.

关键词： intense generating stabilization

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烟雾病诊断标准——2021修订版

中国脑血管病杂志 2023年第12期20卷 862-865页

作者： Kuroda S Fujimura M takahashi j 日本烟雾病(Willis环自发性闭塞)研究委员会董晓(译) 褚学红(译) 刘圆圆(译) 吉训明(译) 吴川杰(译) 不详首都医科大学宣武医院神经内科北京100053 首都医科大学宣武医院神经外科北京100053

该诊断标准中,烟雾病(Willis环自发性闭塞)研究委员会详细阐述了《烟雾病诊断标准——2021修订版》的变化及其科学依据,便于对2021修订版诊断标准更好地普及和推广。该修订版覆盖了烟雾病的方方面面,包括烟雾病的概念、影像学诊断标准... 详细信息

该诊断标准中,烟雾病(Willis环自发性闭塞)研究委员会详细阐述了《烟雾病诊断标准——2021修订版》的变化及其科学依据,便于对2021修订版诊断标准更好地普及和推广。该修订版覆盖了烟雾病的方方面面,包括烟雾病的概念、影像学诊断标准、类烟雾病(烟雾综合征)的概念等。

关键词：烟雾病诊断标准脑血管造影磁共振成像

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通气搅拌发酵罐加压时的氧吸收率

发酵科技通讯 1983年第1期 58-62页

作者： S·SATO S·MUKATAKA H·KATAOKA j·takahashi 张敏华

通气搅拌发酵罐加压至5.9大气压,以亚硫酸氧化法测定其氧吸收率,以说明压力对氧吸收率的影响。供给一定量流速的空气时,氧吸收率比例地增加至压力P的0.4～0.8次方,而容积氧传递系数随压力的增加而减低。供给相同表面线速度的空气时,氧... 详细信息

通气搅拌发酵罐加压至5.9大气压,以亚硫酸氧化法测定其氧吸收率,以说明压力对氧吸收率的影响。供给一定量流速的空气时,氧吸收率比例地增加至压力P的0.4～0.8次方,而容积氧传递系数随压力的增加而减低。供给相同表面线速度的空气时,氧吸收率比例地增加至压力的1.1次方,而容积氧传递系数比例地增加至P0.1。考虑到受压力影响下的容积氧传递系数（Kd）推荐下面的经验公式:Kd=2.8×10-8(P0.1(μGP0.35(N1.8)这里μGP是表面空气线速度,N是叶轮转速。

关键词：氧吸收率空气氧摄取率工业气体

Measurements of dihadron correlations relative to the event plane in Au+Au collisions at√^(S)NN=200 GeV

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Chinese Physics C 2021年第4期45卷 198-241页

作者： H.Agakishiev M.M.Aggarwal Z.Ahammed A.V.Alakhverdyants I.Alekseev j.Alford B.D.Anderson C.D.Anson D.Arkhipkin G.S.Averichev j.Balewski D.R.Beavis N.K.Behera R.Bellwied M.j.Betancourt R.R.Betts A.Bhasin A.K.Bhat H.Bichsel j.Bieleik j.Bielcikova B.Biritz L.C.Bland W.Borowski j.Bouchet E.Braidot A.V.Brandin A.Bridgeman S.G.Brovko E.Bruna S.Bueltmann I.Bunzarov T.P.Burton X.Z.Cai H.Caines M.Calderon de la Barca Sanchez D.Cebra R.Cendejas M.C.Cervantes Z.Chajecki P.Chaloupka S.Chattopadhyay H.F.Chen j.H.Chen j.Y.Chen L.Chen j.Cheng M.Cherney A.Chikanian K.E.Choi W.Christie P.Chung M.j.M.Codrington R.Corliss j.G.Cramer H.j.Crawford S.Dash A.Davila Leyva L.C.De Silvat R.R.Debbe T.G.Dedovich A.A.Derevschikov R.Derradi de Souza L.Didenko P.Djawotho S.M.Dogra X.Dong j.L.Drachenberg j.E.Draper j.C.Dunlop L.G Efimov M.Elnim j.Engelage G Eppley M.Estienne L.Eun O.Evdokimov R.Fatemi j.Fedorisin A.Feng R.G.Fersch P.Filip E.Finch V.Fine Y.Fisyak C.A.Gagliardi D.R.Gangadharan A.Geromitsos F.Geurts P.Ghosh Y.N.Gorbunov A.Gordon O.Grebenyuk D.Grosnick S.M.Guertin A.Gupta W.Guryn B.Haag O.Hajkova A.Hamed L-X.Han j.W.Harris j.P.Hays-Wehle M.Heinz S.Heppelmann A.Hirsch E.Hjort G.W.Hoffmann D.j.Hofiman B.Huang H.Z.Huang T.j.Humanic L.Huo G.Igo P.jacobs W.W.jacobs C.jena F.jin j.joseph E.G.judd S.Kabana K.Kang j.Kapitan K.Kauder H.Ke D.Keane A.Kechechyan D.Kettler D.P.Kikola j.Kiryluk A.Kisiel V.Kizka A.G.Knospe D.D.Koetke T.Kollegger j.Konzer I.Koralt L.Koroleva W.Korsch L.Kotchenda V.Kouchpil P.Kravtsov K.Krueger M.Krus L.Kumar P.Kurnadi M.A.C.Lamont j.M.Landgraf S.LaPointe j.Lauret A.Lebedev R.Lednicky j.H.Lee W.Leight M.j.LeVine C.Lil L.Li N.Li W.Li X.Li X.Li Y.Li Z.M.Li M.A.Lisa F.Liu H.Liu j.Liu T.Ljubicic W.j.Llope R.S.Longacre W.A.Love Y.Lu E.V.Lukashov X.Luo G.L.Ma Y.G.Mai D.P.Mahapatra R.Majka O.I.Mall L.K.Mangotra R.Manweiler S.Margetis C.Markert H.Masui H.S.Matis Yu.A.Matulenko D.MeDonald T.S.McShane A.Meschanin R.Milner N.G.Minaev S.Mioduszewski A.Mischke M.K.Mitrovski B.Mohanty M.M.Mondal B.Morozov D.A.Morozov M.G.Munhoz M Argonne National Laboratory Argonnellinois 60439USA Brookhaven National Laboratory UptonNew York 11973USA University of Califomia BerkeleyCaliformnia 94720USA University of California DavisCalifornia 95616USA University of Califormnia Los AngelesCalifomia 90095USA Universidade Estadual de Campinas Sao PauloBrazil University of Illinois at Chicago ChicagoIlinois 60607USA Creighton University OmahaNebraska 68178USA Czech Technical University in Prague FNSPEPrague11519Czech Republic Nuclear Physics Institute AS CR 25068 Rez/PragueCzech Republic University of Frankfurt FrankfurtGermany Institute of Physics Bhubaneswar 751005India Indian Institute of Technology MumbaiIndia Indiana University BloomingtonIndiana 47408USA Alikhanov Instiute for Theoretical and Experimental Physics MoscowRussia University of jammu Jammu 180001India joint Institute for Nuclear Research Dubna141980Russia Kent State University KentOhio 44242USA University of Kentucky LexingtonKentucky40506-0055USA Institute of Modern Physics LanzhouChina Lawrence Berkeley National Laboratory BerkeleyCalifornia 94720USA Massachusetts Institute of Technology CambridgeMA 02139-4307USA Mx-Planck-Institut fir Physik MunichGermany Michigan State University East LansingMichigan 48824USA Moscow Engineering Physics Institute Moscow Russia NIKHEF and Utrecht University AmsterdamThe Netherlands Ohio State University ColumbusOhio 43210USA Old Dominion University NorfolkVA23529USA Panjab University Chandigarh 160014India PennsyIvania State University University ParkPennsylvania 16802USA Institute of High Energy Physics ProtvinoRussia Purdue University West LafayetteIndiana 47907USA Pusan National University PusanRepublic of Korea University of Rajasthan Jaipur 302004India Rice University HoustonTexas 77251USA Universidade de Sao Paulo Sao PauloBrazil University of Science&Technology of China Hefei 230026.China Shandong University JinanShandong 250100China Shanghai Institute of Applied Physics Shanghai 201800Chi

Dihadron azimuthal correlations containing a high transverse momentum(pr)trigger particle are sensit-ive to the properties of the nuclear medium created at RHIC through the strong interactions occurring between the traversing parton and the medium,*** measurements revealed a strong modification to di-hadron azimuthal correlations in Au+Au collisions with respect to ptp and d+Au *** modification in-creases with the collision centrality,suggesting a path-length or energy density dependence to the je-quenching *** paper reports STAR measurements of dihadron azimuthal correlations in mid-central(20%-60%)Au+Au collisions at√^(S)NN=200 GeV as a function of the trigger particle's azimuthal angle relative to the event plane,Ф_(s)=|Ф_(t)-ψ_(Ep)|.The azimuthal correlation is studied as a function of both the trigger and associated particle *** subtractions of the combinatorial background and anisotropic flow,assuming Zero Yield At Minimum(ZYAM),are *** correlation results are first discussed with subtraction of the even harmonic(elliptic and quadrangu-lar)flow *** away-side correlation is strongly modifed,and the modification varies withФ_(s),with a double-peak structure for out-of-plane trigger *** near-side ridge(long range pseudo-rapidity△_(η)correla-tion)appears to drop with increasingФ_(s)while the jet-like component remains approximately *** correla-tion functions are further studied with the subtraction of odd harmonic triangular flow background arising from *** is found that the triangular flow,while responsible for the majority of the amplitudes,is not sufficient to explain theφs-dependence of the ridge or the away-side double-peak *** dropping ridge withФ_(s)could be attributed to aФ_(s)-dependent lliptie anisotropy;however,the physics mechanism of the ridge remains an open *** with aФ_(s)-dependent elliptic flow,the away-side correlation structure

关键词： relativistic heavy ion collisions dihadron correlations jet-medium interactions anisotropic flow background event plane

血浆亲环蛋白A水平对冠状动脉疾病患者预后的影响

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中华高血压杂志 2017年第2期25卷 199-199页

作者： Ohtsuki T Satoh K Omura j Kikuchi N Satoh T Kurosawa R Nogi M Sunamura S Yaoita N Aoki T Tatebe S Sugimura K takahashi j Miyata S Shimokawa H 刘莉叶鹏

氧化应激状态下,血管平滑肌细胞、炎症细胞分泌亲环蛋白A（cyclophilin A,CyPA）,并激活血小板功能。最近研究表明,血浆CyPA水平是诊断冠状动脉疾病的新型生物标志物。血浆CyPA水平对这些患者的预后是否有影响仍未阐明。方法：连续纳入... 详细信息

氧化应激状态下,血管平滑肌细胞、炎症细胞分泌亲环蛋白A（cyclophilin A,CyPA）,并激活血小板功能。最近研究表明,血浆CyPA水平是诊断冠状动脉疾病的新型生物标志物。血浆CyPA水平对这些患者的预后是否有影响仍未阐明。方法：连续纳入接受诊断性冠状动脉造影的患者511例,测定血浆CyPA水平、高敏C反应蛋白（high-sensitivity C-reactive protein,hsCRP）和血浆脑钠尿肽水平,

关键词：冠状动脉疾病亲环蛋白A 血浆患者预后血管平滑肌细胞高敏C反应蛋白 protein

Challenges for beyond 5G:ultra-densification of radio access network

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通信学报 2020年第11期41卷 1-11页

作者： Fumiyuki Adachi Ryo takahashi Hidenori Matsuo Research Organization of Electrical Communication Tohoku UniversitySendai 980-8577Japan

Ultra-densification of radio access network(RAN)is a key to efficiently support the exponentially growing mobile data traffic in 5 G ***,extremely high frequency band like mm Wave band was utilized to solve the bandwidth shortage ***,untra-dense reusing the same radio resource produced severe *** the mm Wave link was very harsh due to frequent blockage by *** a new RAN architecture needed to be introduced to realize ultra-reliable communications in such a severe radio propagation *** architecture of distributed MIMO based RAN was ***,enhanced interference coordination(e IC)was ***,the effectiveness of distributed MIMO based RAN with e IC by computer simulation was showed.

关键词： 5G advanced systems distributed MIMO radio access network interference coordination cooperative signal transmission

On a New Geometric Constant Related to the Modulus of Smoothness of a Banach Space

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Acta Mathematica Sinica,English Series 2014年第9期30卷 1526-1538页

作者： Yasuji takahashi Mikio KATO Department of System Engineering Okayama Prefectural University Department of Mathematics Faculty of EngineeringShinshu University

We shall introduce a new geometric constant A（X） of a Banach space X, which is closely related to the modulus of smoothness px （T）, and investigate it in relation with the constant As （X） by Baronti et al., the von Neumann-jordan constant CNj（X） and the james constant j（X）. A sequence of recent results on these constants as well as some other geometric constants will be strengthened and improved.

关键词： Constant A(X) von Neumann-jordan constant james constant modulus of smoothness modulus of convexity uniform non-squareness

Urban climate in the Tokyo metropolitan area in japan

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journal of Environmental Sciences 2017年第9期29卷 54-62页

作者： jun Matsumoto Fumiaki Fujibe Hideo takahashi Research Center for Climatology Department of Geography Tokyo Metropolitan University Department of Coupled Ocean-Atmosphere-Land Processes Research JAMSTEC

Long-term climate changes related with urbanization in Tokyo, japan, and recent temperature and heavy rainfall distribution in the Tokyo metropolitan area are reviewed. A relatively high temperature increase in annual mean temperature at the rate of 3.0°C/century was detected in Tokyo for the period 1901–2015. Some observational evidence showed the existence of both thermal and mechanical effects of urbanization on recent heavy rainfall occurrences, and modeling studies also support precipitation enhancement. Urban influences were recognized in other climatological elements, such as number of fog days, relative humidity, and wind circulation.

关键词： Heat island Cool island Heavy rainfall Fog Humidity Sea breeze