نتایج جستجو برای: electron spectrometer

تعداد نتایج: 327383  

Journal: :Analytical sciences : the international journal of the Japan Society for Analytical Chemistry 2008
Takuhiro Kakiuchi Eiichi Kobayashi Koji K Okudaira Narihiko Fujita Masatoshi Tanaka Kazuhiko Mase

We have developed a miniature electron ion coincidence (EICO) analyzer mounted on a conflat flange with an outer diameter of 114 mm. It consists of a cylindrical mirror analyzer (CMA), a time-of-flight ion mass spectrometer (TOF-MS), a commercially available linear motion feed through, and a tilt adjustment mechanism. Each sample surface was irradiated by synchrotron radiation, and the energies...

Journal: :Frontiers in Physics 2022

We study resonant two-photon ionization of helium atoms via the 1 s 3 p , 4 and 5 P states using 15 th harmonic a titanium-sapphire laser for excitation weak fraction field ionization. The phase photoelectron wavepackets is measured by an attosecond interferometric technique, 17 harmonic. perform experiments with angular resolution velocity map imaging spectrometer high energy magnetic bottle e...

Journal: :Physical review letters 2013
F Albert B B Pollock J L Shaw K A Marsh J E Ralph Y-H Chen D Alessi A Pak C E Clayton S H Glenzer C Joshi

We present the first measurements of the angular dependence of the betatron x-ray spectrum produced by electrons inside the cavity of a laser-wakefield accelerator. Electrons accelerated up to 300 MeV energies produce a beam of broadband, forward-directed betatron x-ray radiation extending up to 80 keV. The angular resolved spectrum from an image plate-based spectrometer with differential filte...

Journal: :Physical review letters 2013
M Aguilar G Alberti B Alpat A Alvino G Ambrosi K Andeen H Anderhub L Arruda P Azzarello A Bachlechner F Barao B Baret A Barrau L Barrin A Bartoloni L Basara A Basili L Batalha J Bates R Battiston J Bazo R Becker U Becker M Behlmann B Beischer J Berdugo P Berges B Bertucci G Bigongiari A Biland V Bindi S Bizzaglia G Boella W de Boer K Bollweg J Bolmont B Borgia S Borsini M J Boschini G Boudoul M Bourquin P Brun M Buénerd J Burger W Burger F Cadoux X D Cai M Capell D Casadei J Casaus V Cascioli G Castellini I Cernuda F Cervelli M J Chae Y H Chang A I Chen C R Chen H Chen G M Cheng H S Chen L Cheng N Chernoplyiokov A Chikanian E Choumilov V Choutko C H Chung C Clark R Clavero G Coignet V Commichau C Consolandi A Contin C Corti M T Costado Dios B Coste D Crespo Z Cui M Dai C Delgado S Della Torre B Demirkoz P Dennett L Derome S Di Falco X H Diao A Diago L Djambazov C Díaz P von Doetinchem W J Du J M Dubois R Duperay M Duranti D D'Urso A Egorov A Eline F J Eppling T Eronen J van Es H Esser A Falvard E Fiandrini A Fiasson E Finch P Fisher K Flood R Foglio M Fohey S Fopp N Fouque Y Galaktionov M Gallilee L Gallin-Martel G Gallucci B García J García R García-López L García-Tabares C Gargiulo H Gast I Gebauer S Gentile M Gervasi W Gillard F Giovacchini L Girard P Goglov J Gong C Goy-Henningsen D Grandi M Graziani A Grechko A Gross I Guerri C de la Guía K H Guo M Habiby S Haino F Hauler Z H He M Heil J Heilig R Hermel H Hofer Z C Huang W Hungerford M Incagli M Ionica A Jacholkowska W Y Jang H Jinchi M Jongmanns L Journet L Jungermann W Karpinski G N Kim K S Kim Th Kirn R Kossakowski A Koulemzine O Kounina A Kounine V Koutsenko M S Krafczyk E Laudi G Laurenti C Lauritzen A Lebedev M W Lee S C Lee C Leluc H León Vargas V Lepareur J Q Li Q Li T X Li W Li Z H Li P Lipari C H Lin D Liu H Liu T Lomtadze Y S Lu S Lucidi K Lübelsmeyer J Z Luo W Lustermann S Lv J Madsen R Majka A Malinin C Mañá J Marín T Martin G Martínez F Masciocchi N Masi D Maurin A McInturff P McIntyre A Menchaca-Rocha Q Meng M Menichelli I Mereu M Millinger D C Mo M Molina P Mott A Mujunen S Natale P Nemeth J Q Ni N Nikonov F Nozzoli P Nunes A Obermeier S Oh A Oliva F Palmonari C Palomares M Paniccia A Papi W H Park M Pauluzzi F Pauss A Pauw E Pedreschi S Pensotti R Pereira E Perrin G Pessina G Pierschel F Pilo A Piluso C Pizzolotto V Plyaskin J Pochon M Pohl V Poireau S Porter J Pouxe A Putze L Quadrani X N Qi P G Rancoita D Rapin Z L Ren J S Ricol E Riihonen I Rodríguez U Roeser S Rosier-Lees L Rossi A Rozhkov D Rozza A Sabellek R Sagdeev J Sandweiss B Santos P Saouter M Sarchioni S Schael D Schinzel M Schmanau G Schwering A Schulz von Dratzig G Scolieri E S Seo B S Shan J Y Shi Y M Shi T Siedenburg R Siedling D Son F Spada F Spinella M Steuer K Stiff W Sun W H Sun X H Sun M Tacconi C P Tang X W Tang Z C Tang L Tao J Tassan-Viol Samuel C C Ting S M Ting C Titus N Tomassetti F Toral J Torsti J R Tsai J C Tutt J Ulbricht T Urban V Vagelli E Valente C Vannini E Valtonen M Vargas Trevino S Vaurynovich M Vecchi M Vergain B Verlaat C Vescovi J P Vialle G Viertel G Volpini D Wang N H Wang Q L Wang R S Wang X Wang Z X Wang W Wallraff Z L Weng M Willenbrock M Wlochal H Wu K Y Wu Z S Wu W J Xiao S Xie R Q Xiong G M Xin N S Xu W Xu Q Yan J Yang M Yang Q H Ye H Yi Y J Yu Z Q Yu S Zeissler J G Zhang Z Zhang M M Zhang Z M Zheng H L Zhuang V Zhukov A Zichichi P Zuccon C Zurbach

A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8 × 10(6) positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to ∼ 250  GeV, but, from 20 to 250 GeV, the slope decreases by an...

Journal: :Physical review letters 2010
Hideaki Habara Kazuhide Ohta Kazuo A Tanaka G Ravindra Kumar M Krishnamurthy Subhendu Kahaly Sudipta Mondal Manoj Kumar Bhuyan R Rajeev Jian Zheng

We present direct measurements of the absolute energy distribution of relativistic electrons generated in intense, femtosecond laser interaction with a solid. Cherenkov emission radiated by these electrons in a novel prism target is spectrally dispersed to obtain yield and energy distribution of electrons simultaneously. A crucial advance is the observation of high density electron current as p...

2014
E. Silver T. Lin J. Beeman E. E. Haller

A cryogenic microcalorimeter x-ray spectrometer is coupled to an FEI XL30 environmental scanning electron microscope (ESEM). The microcalorimeter is designed to obtain high resolution broadband xray spectra in the energy range of 150 eV to 10 keV. An x-ray optic enhances the solid angle for x-ray energies between 150 eV and 2300 eV. This enables precise microanalysis with relatively low energy ...

Journal: :Journal of physics. Condensed matter : an Institute of Physics journal 2009
M Muñoz-Navia C Winkler R Patel M Birke F O Schumann J Kirschner

The electron pair emission from a W(001) surface was studied using a coincidence time-of-flight spectrometer. The aim of this study was to compare the pair emission upon electron impact and upon photon absorption. The energy distributions are markedly different for these two experiments. From this we conclude that the photon-stimulated pair emission carries a significant contribution from a dou...

Journal: : 2023

قدرت تفکیک دستگاه طیف‌نگار جرمی به صورت مستقیم شدت یون خروجی و انرژی آن بستگی دارد. مقدار تولید شده جریان باریکه الکترونی وابسته است. از جمله وظایف مدار کنترل چشمه برخورد تنظیم برای رسیدن بهینه می‌باشد. در ساخت پارامترهایی نظیر تثبیت آن، دقیق پتانسل الکتریکی لنز الکترودهای یونی بسیار حایز اهمیت این مقاله با قابلیت انتشار الکترون، پتانسیل نقاط طراحی ساخته شد. کنترلر بر روی طیف نگار 44Varian MAT ...

2006
David R. Smith David M. Walton Richard Ingley Andrew D. Holland Mark Cropper Peter Pool

This paper describes a qualification programme for Electron-Multiplication Charge Coupled Devices (EMCCDs) for use in space applications. While the presented results are generally applicable, the programme was carried out in the context of CCD development for the Radial Velocity Spectrometer (RVS) instrument on the European Space Agency’s cornerstone Gaia mission. We discuss the issues of devic...

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