Keyword: insertion-device
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TUPMK002 First Tests of the Apple II Undulator for the LOREA Insertion Device and Front End vacuum, undulator, simulation, optics 1488
 
  • J. Campmany, L.G.O. Garcia-Orta, J. Marcos, Z. Martí, V. Massana, M. Quispe
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  
  ALBA syn­chro­tron is cur­rently in­stalling the new beam­line LOREA (Low-En­ergy Ul­tra-High-Res­o­lu­tion An­gu­lar Pho­toe­mis­sion for Com­plex Ma­te­ri­als at ALBA). It op­er­ates in the range of 10 - 1500 eV with po­lar­ized light. To pro­duce the light for the beam­line, an Apple II un­du­la­tor with a pe­riod of 125 mm has been cho­sen. It can op­er­ate as an un­du­la­tor at low en­er­gies and as a wig­gler at high en­er­gies, pro­vid­ing a wide en­ergy range. The de­vice was built by KYMA, de­liv­ered on Feb­ru­ary 2017 and in­stalled in Au­gust 2017. We pre­sent the mag­netic mea­sure­ments made dur­ing SAT as well as the sim­u­la­tions of the in­flu­ence of the ID in the elec­tron beam dy­nam­ics and the first mea­sure­ments with beam. On the other hand, the high de­mand­ing char­ac­ter­is­tics of the beam­line lead to a de­vice pro­vid­ing high power and wide beam in some work­ing modes. This sit­u­a­tion has been a chal­lenge for the Front End (FE) ther­mal load. It has been built by the com­pa­nies RMP and TVP, and the FE mod­ules have been in­stalled in the tun­nel along au­tumn 2017. We pre­sent the Site Ac­cep­tance Tests re­sults as well as the tech­ni­cal so­lu­tions adopted, es­pe­cially in terms of me­chan­i­cal de­sign and used ma­te­ri­als.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUPMK002  
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THPAK077 Feasibility of Non-Metal Vacuum Chamber for Storage Rings impedance, vacuum, cavity, insertion 3411
 
  • T.-Y. Lee
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  This paper stud­ies if the vac­uum cham­ber of an elec-tron stor­age ring can be made of di­elec­tric non-meta ma­te­ri­als such as ce­ram­ics or glass. The pur­pose of this study is to sub­stan­tially re­duce the broad­band imped-ance of the vac­uum cham­ber and con­se­quently mit­i­gate sin­gle bunch in­sta­bil­i­ties. This the­o­ret­i­cal study ex­am­ines how these ma­te­ri­als can re­duce the im­ped­ance and pro-poses how to re­solve tech­ni­cal prob­lems to occur.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK077  
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THPMF067 Design and Tests of Switchable Period Length Superconducting Undulator Coils undulator, photon, insertion, synchrotron 4226
 
  • T. Holubek, S. Casalbuoni, S. Gerstl, N. Glamann, A.W. Grau, C.A.J. Meuter, D. Saez de Jauregui
    KIT, Eggenstein-Leopoldshafen, Germany
  
  Sev­eral pho­ton beam­lines in dif­fer­ent syn­chro­tron make use of un­du­la­tors with switch­able pe­riod length, which offer a larger tun­abil­ity of the emit­ted pho­tons en­ergy. Su­per­con­duct­ing tech­nol­ogy al­lows switch­ing the pe­riod length by chang­ing the sign of the cur­rent in sep­a­rately pow­ered sub­set of wind­ings. We pre­sent here the de­sign and tests per­formed in liq­uid he­lium of switch­able pe­riod length su­per­con­duct­ing un­du­la­tor coils per­form­ing pe­riod dou­bling from 17 mm to 34 mm.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPMF067  
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