Author: Gallo, A.
Paper Title Page
MOPAB257 Effects of Mode Launcher on Beam Dynamics in Next Generation High Brightness C-Band Guns 813
 
  • A. Giribono, D. Alesini, F. Cardelli, G. Di Raddo, M. Ferrario, A. Gallo, J. Scifo, C. Vaccarezza, A. Vannozzi
    INFN/LNF, Frascati (Roma), Italy
  • G. Castorina
    AVO-ADAM, Meyrin, Switzerland
  • L. Ficcadenti
    INFN-Roma, Roma, Italy
  • G. Muti
    Sapienza University of Rome, Rome, Italy
  • G. Pedrocchi
    SBAI, Roma, Italy
  
  High-bright­ness RF photo-in­jec­tors plays nowa­days a cru­cial role in the fields of ra­di­a­tion gen­er­a­tion and ad­vanced ac­cel­er­a­tion schemes. A high gra­di­ent C-band pho­toin­jec­tor con­sist­ing of a 2.5 cell gun fol­lowed by TW sec­tions is here pro­posed as an elec­tron source for ra­di­a­tion user fa­cil­i­ties. The paper re­ports on beam dy­nam­ics stud­ies in the RF in­jec­tor and il­lus­trates the ef­fects on the beam qual­ity of the mode launcher with a focus on the com­pen­sa­tion of the quadru­pole RF com­po­nents.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB257  
About • paper received ※ 19 May 2021       paper accepted ※ 08 June 2021       issue date ※ 16 August 2021  
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TUPAB001 DAΦNE Commissioning for SIDDHARTA-2 Experiment 1322
 
  • C. Milardi, D. Alesini, O.R. Blanco-García, M. Boscolo, B. Buonomo, S. Cantarella, A. D’Uffizi, A. De Santis, C. Di Giulio, G. Di Pirro, A. Drago, L.G. Foggetta, G. Franzini, A. Gallo, S. Incremona, A. Michelotti, L. Pellegrino, L. Piersanti, R. Ricci, U. Rotundo, L. Sabbatini, A. Stecchi, A. Stella, A. Vannozzi, M. Zobov
    INFN/LNF, Frascati, Italy
  • J. Chavanne, G. Le Bec, P. Raimondi
    ESRF, Grenoble, France
  
  DAΦNE, the Fras­cati lep­ton col­lider, has com­pleted the prepara­tory phase in order to de­liver lu­mi­nos­ity to the SID­DHARTA-2 de­tec­tor. DAΦNE col­lid­ing rings rely on a new in­ter­ac­tion re­gion, which im­ple­ments the well-es­tab­lished Crab-Waist col­li­sion scheme, and in­cludes a low-beta sec­tion equipped with newly de­signed per­ma­nent mag­net quadrupoles, and vac­uum com­po­nents. Di­ag­nos­tics tools have been im­proved, es­pe­cially the ones used to keep under con­trol the beam-beam in­ter­ac­tion. The hor­i­zon­tal feed­back in the positron ring has been po­ten­ti­ated in order to achieve a higher positron cur­rent. Lu­mi­nos­ity di­ag­nos­tics have been also up­dated so to be com­pat­i­ble with the new de­tec­tor de­sign. The com­mis­sion­ing was ini­tially fo­cused on re­cov­er­ing the op­ti­mal dy­nam­i­cal vac­uum con­di­tions, out­lin­ing align­ment er­rors, and op­ti­miz­ing ring op­tics. For this rea­son, a de­tuned op­tics, fea­tured by re­laxed low-b con­di­tion at the in­ter­ac­tion point and Crab-Waist Ses­tupoles off, has been ap­plied. In a sec­ond stage a low-b op­tics has been im­ple­mented to test col­li­sions with a pre­lim­i­nary setup of the ex­per­i­ment de­tec­tor. Ma­chine prepa­ra­tion and the first lu­mi­nos­ity re­sults are pre­sented and dis­cussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB001  
About • paper received ※ 19 May 2021       paper accepted ※ 09 June 2021       issue date ※ 10 August 2021  
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WEPAB301 Design of an X-Band LLRF System for TEX Test Facility at LNF-INFN 3371
 
  • L. Piersanti, D. Alesini, M. Bellaveglia, S. Bini, B. Buonomo, F. Cardelli, C. Di Giulio, M. Diomede, A. Falone, G. Franzini, A. Gallo, A. Liedl, S. Pioli, S. Quaglia, L. Sabbatini, M. Scampati, G. Scarselletta, A. Stella
    INFN/LNF, Frascati, Italy
  
  Funding: Latino is a project co-funded by Regione Lazio within POR-FESR 2014-2020 program
In the frame­work of LATINO pro­ject (Lab­o­ra­tory in Ad­vanced Tech­nolo­gies for IN­nO­va­tion) funded by Lazio re­gional gov­ern­ment, a TEst stand for X-band (TEX) is being com­mis­sioned at Fras­cati Na­tional Lab­o­ra­to­ries (LNF) of INFN. TEX is born as a col­lab­o­ra­tion with CERN, aimed at car­ry­ing out high power tests of X-band ac­cel­er­at­ing struc­ture pro­to­types and wave­guide com­po­nents, and it is of para­mount im­por­tance in view of the con­struc­tion of EuPRAXIA@​SPARC_​LAB fa­cil­ity at LNF. In order to gen­er­ate, ma­nip­u­late and mea­sure the RF pulses needed to feed the RF power unit (solid state Scan­di­Nova K400 mod­u­la­tor, CPI 50 MW 50 Hz kly­stron) an X-band low level RF sys­tem has been de­vel­oped, mak­ing use of a com­mer­cial S-band (2.856 GHz) Lib­era dig­i­tal LLRF (man­u­fac­tured by In­stru­men­ta­tion Tech­nolo­gies) with a newly de­signed up/down con­ver­sion stage and a ref­er­ence gen­er­a­tion/dis­tri­b­u­tion sys­tem, which is able to pro­duce co­her­ent ref­er­ence fre­quen­cies for the Amer­i­can S-band (2.856 GHz) and Eu­ro­pean X-band (11.994 GHz). In this paper the main fea­tures of such sys­tems will be re­viewed to­gether with pre­lim­i­nary lab­o­ra­tory mea­sure­ment re­sults. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB301  
About • paper received ※ 19 May 2021       paper accepted ※ 12 July 2021       issue date ※ 27 August 2021  
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WEPAB314 TEX - an X-Band Test Facility at INFN-LNF 3406
 
  • S. Pioli, D. Alesini, F.A. Anelli, M. Bellaveglia, S. Bini, B. Buonomo, S. Cantarella, F. Cardelli, G. Catuscelli, R. Ceccarelli, A. Cecchinelli, F. Chiarelli, P. Ciuffetti, R. Clementi, C. Di Giulio, E. Di Pasquale, G. Di Raddo, M. Diomede, A. Esposito, L. Faillace, A. Falone, G. Franzini, A. Gallo, S. Incremona, A. Liedl, D. Pellegrini, G. Piermarini, L. Piersanti, S. Quaglia, R. Ricci, L. Sabbatini, M. Scampati, G. Scarselletta, A. Stella, R. Zarlenga
    INFN/LNF, Frascati, Italy
  
  Funding: The LATINO project is co-funded by the Regione Lazio within POR-FESR 2014-2020 European activities (public call "Open Research Infrastructures").
We re­port the sta­tus of the de­vel­op­ment of an High Power RF Lab­o­ra­tory in X-Band called TEX (TEst-stand for X-Band). TEX is part of the LATINO (Lab­o­ra­tory in Ad­vanced Tech­nolo­gies for IN­nO­va­tion) ini­tia­tive that is on­go­ing at the Fras­cati Na­tional Lab­o­ra­to­ries (LNF) of the Ital­ian In­sti­tute for Nu­clear Physics (INFN) that cov­ers many dif­fer­ent areas fo­cused on par­ti­cle ac­cel­er­a­tor tech­nolo­gies. TEX is a RF test fa­cil­ity based on solid-state K400 mod­u­la­tor from Scan­di­Nova with a 50MW class X-band (11.996 GHz) kly­stron tube model vkx 8311a op­er­at­ing at 50 Hz. This RF source will op­er­ate as re­source for test and re­search pro­grams such as the RF break­down on RF wave­guide com­po­nents as well as high power test­ing of ac­cel­er­at­ing struc­tures for fu­ture high gra­di­ent lin­ear ac­cel­er­a­tor such as Eu­PRAXIA and CLIC. The high power test­ing will be per­formed in a ded­i­cated brand-new bunker that has been re­cently built. RF sys­tem, vac­uum con­trols and safety equip­ments are cur­rently being in­stalled. The first ac­cel­er­at­ing struc­ture test­ing is sched­uled by be­gin­ning 2022. In this doc­u­ment de­sign and tests for all the sub-sys­tems of the fa­cil­ity will be pre­sented and dis­cussed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB314  
About • paper received ※ 19 May 2021       paper accepted ※ 28 July 2021       issue date ※ 19 August 2021  
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WEPAB398 A C-Band RF Mode Launcher with Quadrupole Field Components Cancellation for High Brightness Applications 3638
 
  • G. Pedrocchi
    SBAI, Roma, Italy
  • D. Alesini, F. Cardelli, A. Gallo, A. Giribono, B. Spataro
    INFN/LNF, Frascati, Italy
  • G. Castorina
    AVO-ADAM, Meyrin, Switzerland
  • L. Ficcadenti
    INFN-Roma, Roma, Italy
  • M. Migliorati, A. Mostacci, L. Palumbo
    Sapienza University of Rome, Rome, Italy
  
  The R&D of high gra­di­ent ra­diofre­quency de­vices is aimed to de­velop in­no­v­a­tive and com­pact ac­cel­er­at­ing stuc­tures based on new man­u­fac­tor­ing tech­niques and ma­te­ri­als in order to pro­duce de­vices op­er­at­ing with the high­est ac­cel­er­at­ing gra­di­ent. Re­cent stud­ies have shown a large in­crease in the max­i­mum sus­tained RF sur­face elec­tric fields in cop­per struc­ture op­er­at­ing at cryo­genic tem­per­a­ture. These novel ap­proaches allow sig­nif­i­cant per­for­mance im­prove­ments of RF pho­toin­jec­tors. In­deed the op­er­a­tion at high sur­face fields re­sults in con­sid­er­able in­crease of elec­tron bril­liance. This re­quires high field qual­ity in the RF pho­toin­jec­tor and specif­i­cally in its poweer cou­pler. In this work we pre­sent a novel power cou­pler for the RF pho­toin­jec­tor. The cou­pler is a com­pact C-band TM01 mode launcher with a four­fold sym­me­try which min­i­mized both the di­pole and the quadru­pole RF field com­po­nents.  
poster icon Poster WEPAB398 [1.799 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB398  
About • paper received ※ 13 May 2021       paper accepted ※ 06 July 2021       issue date ※ 23 August 2021  
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THPAB372 SABINA: A Research Infrastructure at LNF 4505
 
  • L. Sabbatini, D. Alesini, M.P. Anania, M. Bellaveglia, A. Biagioni, B. Buonomo, S. Cantarella, F. Cardelli, E. Chiadroni, G. Costa, G. Di Pirro, F. Dipace, A. Esposito, M. Ferrario, M. Galletti, A. Gallo, A. Ghigo, L. Giannessi, A. Giribono, S. Incremona, L. Pellegrino, L. Piersanti, R. Pompili, R. Ricci, J. Scifo, A. Stecchi, A. Stella, C. Vaccarezza, A. Vannozzi, S. Vescovi, F. Villa
    INFN/LNF, Frascati, Italy
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • A. Cianchi
    INFN-Roma II, Roma, Italy
  • A. Doria, A. Petralia
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • L. Giannessi
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
  • S. Lupi
    Sapienza University of Rome, Roma, Italy
  • S. Macis
    La Sapienza University of Rome, Rome, Italy
  • V. Petrillo
    Universita’ degli Studi di Milano, Milano, Italy
  • V. Petrillo
    INFN-Milano, Milano, Italy
  
  Funding: SABINA is a project co-funded by Regione Lazio within POR-FESR 2014-2020 program.
SABINA (Source of Ad­vanced Beam Imag­ing for Novel Ap­pli­ca­tions) is a pro­ject aimed at the en­hance­ment of the SPAR­C_LAB re­search fa­cil­ity. This en­hance­ment is car­ried out through the fol­low­ing ac­tions: first, the in­crease of the up­time through the con­sol­i­da­tion of tech­no­log­i­cal sys­tems and the re­place­ment of some crit­i­cal equip­ment in order to limit the num­ber and ex­tent of faults; then, the im­prove­ment of the ac­cel­er­a­tor per­for­mances, by re­plac­ing some de­vices with up­dated ones. The ef­fect will be greater re­li­a­bil­ity of the ac­cel­er­a­tor, which will allow it to be opened as a fa­cil­ity for ex­ter­nal users, both in­dus­trial and sci­en­tific, with the goal of in­creas­ing the com­pet­i­tive­ness of in­dus­tries in a broad range of tech­no­log­i­cal areas and en­hanc­ing col­lab­o­ra­tions with re­search in­sti­tu­tions. The two user lines that will be im­ple­mented are a power laser tar­get area and a THz ra­di­a­tion line, by using a ded­i­cated un­du­la­tor. The un­du­la­tor and the THz line are also de­scribed in other con­tri­bu­tions to this con­fer­ence. A brief de­scrip­tion of the pro­ject and po­ten­tial ex­ploita­tions are re­ported. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB372  
About • paper received ※ 24 May 2021       paper accepted ※ 01 July 2021       issue date ※ 20 August 2021  
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