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Title |
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| MOOCA01 |
High Power Test Results of the SPARC C-Band Accelerating Structures |
39 |
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- D. Alesini, M. Bellaveglia, M.E. Biagini, R. Boni, P. Chimenti, R. Clementi, G. Di Pirro, R. D. Di Raddo, M. Ferrario, A. Gallo, V.L. Lollo
INFN/LNF, Frascati (Roma), Italy
- M. Brönnimann, R. Kalt, T. Schilcher
PSI, Villigen PSI, Switzerland
- L. Ficcadenti
INFN-Roma, Roma, Italy
- L. Palumbo
URLS, Rome, Italy
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The energy upgrade of the SPARC photo-injector at LNF-INFN (Italy) from 150 to more than 240 MeV will be done by replacing a low gradient S-Band accelerating structure with two C-band structures. The structures are Traveling Wave (TW) and Constant Impedance (CI), have symmetric axial input couplers and have been optimized to work with a SLED RF input pulse. In the paper we present the results of the low and high power RF tests on the two final fabricated structures that shown the feasibility of the operation at accelerating gradients larger than 35 MV/m.
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Slides MOOCA01 [6.242 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-MOOCA01
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| MOOCA02 |
RF Design and Operation of a Modular Cavity for Muon Ionization Cooling R&D |
42 |
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- Y. Torun
IIT, Chicago, Illinois, USA
- D.L. Bowring, M.A. Palmer, K. Yonehara
Fermilab, Batavia, Illinois, USA
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Funding: Supported by the US Department of Energy Office of Science through the Muon Accelerator Program.
Ionization cooling channel designs call for the operation of high-gradient, normal-conducting RF cavities in multi-Tesla solenoidal magnetic fields. However, strong magnetic fields have been shown in some cases to limit the maximum achievable gradient in RF cavities. This gradient limit is characterized by RF breakdown and damage to the cavity surface. To study this issue, we have developed an experimental program at Fermilab's MuCool Test Area (MTA) based on a modular pillbox cavity operating at 805 MHz. The modular cavity design allows for the evaluation of different cavity geometries and materials – such as beryllium – which may ameliorate or circumvent RF breakdown triggers. We present a summary of recent results and plans for the future of the MTA normal conducting RF cavity program.
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Slides MOOCA02 [32.552 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-MOOCA02
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| MOOCA03 |
Design of High-power Graphene Beam Window |
45 |
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- H.J. Wang, H.T. Jing, H. Qu, J.Y. Tang
IHEP, Beijing, People's Republic of China
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Beam window is a key device in high-intensity hadron beam applications, and it is usually used to separate air or other gas environments in the end of beam vacuum duct. Compared with the usually-used window materials such as Inconel alloy, Aluminum alloy and so on, the graphene has extremely high thermal conductivity, high strength and high transparency to high-energy ions. With the maturation of large-size graphene manufacturing technology, we have studied this new-type window for MW-class proton beam. The thermal analyses by the theoretical formula and simulations based on FEA are presented in this paper. Simultaneously, the scattering effect and the lifetime are also discussed. The preliminary results are promising. The same material can also be possibly applied to other devices such as charge-exchange stripping foils, beam monitors and so on.
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Slides MOOCA03 [1.467 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2014-MOOCA03
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