Pb thin films were prepared at room temperature and in high vacuum by thermal evaporation and pulsed laser deposition techniques. Films deposited by both the techniques were investigated by scanning electron microscopy to determine their surface topology. The structure of the films was studied by X-ray diffraction in θ–2θ geometry. The photoelectron performances in terms of quantum efficiency were deduced by a high vacuum photodiode cell before and after laser cleaning procedures. Relatively high quantum efficiency (>10−5) was obtained for all the deposited films, comparable to that of corresponding bulk. Finally, film to substrate adhesion was also evaluated using the Daimler–Benz Rockwell-C adhesion test method. Weak and strong points of these two competitive techniques are illustrated and discussed. ; Funding Agencies|Istituto Nazionale di Fisica Nucleare (INFN)||Swedish Government Strategic Research Area Grant in Materials Science (SFO Mat-LiU)||
CompactLight (XLS) is an International Collaboration of 24 partners and 5 third parties, funded by the European Union through the Horizon 2020 Research and Innovation Programme. The main goal of the project, which started in January 2018 with a duration of 36 months, is the design of an hard X-ray FEL facility beyond today's state of the art, using the latest concepts for bright electron photo-injectors, high-gradient accelerating structures, and innovative short-period undulators. The specifications of the facility and the parameters of the future FEL are driven by the demands of potential users and the associated science cases. In this paper we will give an overview on the ongoing activities and the major results achieved until now.
In: Assmann , R W , Weikum , M K , Akhter , T , Alesini , D , Alexandrova , A S , Anania , M P , Andreev , N E , Andriyash , I , Artioli , M , Aschikhin , A , Audet , T , Bacci , A , Barna , I F , Bartocci , S , Bayramian , A , Beaton , A , Beck , A , Bellaveglia , M , Beluze , A , Bernhard , A , Biagioni , A , Bielawski , S , Bisesto , F G , Bonatto , A , Boulton , L , Brandi , F , Brinkmann , R , Briquez , F , Brottier , F , Bründermann , E , Büscher , M , Buonomo , B , Bussmann , M H , Bussolino , G , Campana , P , Cantarella , S , Cassou , K , Chancé , A , Chen , M , Chiadroni , E , Cianchi , A , Cioeta , F , Clarke , J A , Cole , J M , Costa , G , Couprie , M E , Cowley , J , Croia , M , Cros , B , Crump , P A , D'Arcy , R , Dattoli , G , Del Dotto , A , Delerue , N , Del Franco , M , Delinikolas , P , De Nicola , S , Dias , J M , Di Giovenale , D , Diomede , M , Di Pasquale , E , Di Pirro , G , Di Raddo , G , Dorda , U , Erlandson , A C , Ertel , K , Esposito , A , Falcoz , F , Falone , A , Fedele , R , Ferran Pousa , A , Ferrario , M , Filippi , F , Fils , J , Fiore , G , Fiorito , R , Fonseca , R A , Franzini , G , Galimberti , M , Gallo , A , Galvin , T C , Ghaith , A , Ghigo , A , Giove , D , Giribono , A , Gizzi , L A , Grüner , F J , Habib , A F , Haefner , C , Heinemann , T , Helm , A , Hidding , B , Holzer , B J , Hooker , S M , Hosokai , T , Hübner , M , Ibison , M , Incremona , S , Irman , A , Iungo , F , Jafarinia , F J , Jakobsson , O , Jaroszynski , D A , Jaster-Merz , S , Joshi , C , Kaluza , M , Kando , M , Karger , O S , Karsch , S , Khazanov , E , Khikhlukha , D , Kirchen , M , Kirwan , G , Kitégi , C , Knetsch , A , Kocon , D , Koester , P , Kononenko , O S , Korn , G , Kostyukov , I , Kruchinin , K O , Labate , L , Le Blanc , C , Lechner , C , Lee , P , Leemans , W , Lehrach , A , Li , X , Li , Y , Libov , V , Lifschitz , A , Lindstrøm , C A , Litvinenko , V , Lu , W , Lundh , O , Maier , A R , Malka , V , Manahan , G G , Mangles , S P D , Marcelli , A , Marchetti , B , Marcouillé , O , Marocchino , A , Marteau , F , Martinez de la Ossa , A , Martins , J L , Mason , P D , Massimo , F , Mathieu , F , Maynard , G , Mazzotta , Z , Mironov , S , Molodozhentsev , A Y , Morante , S , Mosnier , A , Mostacci , A , Müller , A S , Murphy , C D , Najmudin , Z , Nghiem , P A P , Nguyen , F , Niknejadi , P , Nutter , A , Osterhoff , J , Oumbarek Espinos , D , Paillard , J L , Papadopoulos , D N , Patrizi , B , Pattathil , R , Pellegrino , L , Petralia , A , Petrillo , V , Piersanti , L , Pocsai , M A , Poder , K , Pompili , R , Pribyl , L , Pugacheva , D , Reagan , B A , Resta-Lopez , J , Ricci , R , Romeo , S , Rossetti Conti , M , Rossi , A R , Rossmanith , R , Rotundo , U , Roussel , E , Sabbatini , L , Santangelo , P , Sarri , G , Schaper , L , Scherkl , P , Schramm , U , Schroeder , C B , Scifo , J , Serafini , L , Sharma , G , Sheng , Z M , Shpakov , V , Siders , C W , Silva , L O , Silva , T , Simon , C , Simon-Boisson , C , Sinha , U , Sistrunk , E , Specka , A , Spinka , T M , Stecchi , A , Stella , A , Stellato , F , Streeter , M J V , Sutherland , A , Svystun , E N , Symes , D , Szwaj , C , Tauscher , G E , Terzani , D , Toci , G , Tomassini , P , Torres , R , Ullmann , D , Vaccarezza , C , Valléau , M , Vannini , M , Vannozzi , A , Vescovi , S , Vieira , J M , Villa , F , Wahlström , C G , Walczak , R , Walker , P A , Wang , K , Welsch , A , Welsch , C P , Weng , S M , Wiggins , S M , Wolfenden , J , Xia , G , Yabashi , M , Zhang , H , Zhao , Y , Zhu , J & Zigler , A 2020 , ' EuPRAXIA Conceptual Design Report ' , European Physical Journal: Special Topics , vol. 229 , no. 24 , pp. 3675-4284 . https://doi.org/10.1140/epjst/e2020-000127-8
This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over the last four years in a unique collaboration of 41 laboratories within a Horizon 2020 design study funded by the European Union. EuPRAXIA is the first European project that develops a dedicated particle accelerator research infrastructure based on novel plasma acceleration concepts and laser technology. It focuses on the development of electron accelerators and underlying technologies, their user communities, and the exploitation of existing accelerator infrastructures in Europe. EuPRAXIA has involved, amongst others, the international laser community and industry to build links and bridges with accelerator science — through realising synergies, identifying disruptive ideas, innovating, and fostering knowledge exchange. The Eu-PRAXIA project aims at the construction of an innovative electron accelerator using laser- and electron-beam-driven plasma wakefield acceleration that offers a significant reduction in size and possible savings in cost over current state-of-the-art radiofrequency-based accelerators. The foreseen electron energy range of one to five gigaelectronvolts (GeV) and its performance goals will enable versatile applications in various domains, e.g. as a compact free-electron laser (FEL), compact sources for medical imaging and positron generation, table-top test beams for particle detectors, as well as deeply penetrating X-ray and gamma-ray sources for material testing. EuPRAXIA is designed to be the required stepping stone to possible future plasma-based facilities, such as linear colliders at the high-energy physics (HEP) energy frontier. Consistent with a high-confidence approach, the project includes measures to retire risk by establishing scaled technology demonstrators. This report includes preliminary models for project implementation, cost and schedule that would allow operation of the full Eu-PRAXIA facility within 8—10 years.
