CERN Accelerating science

sLHC Project Notes

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ANSYS modeling of thermal contraction of SPL HOM couplers during cool-down / Papke, K (CERN)
During the cool-down the HOM coupler as well as the cavity inside the cryo module experience a thermal contraction. For most materials between room temperature and liquid helium temperatures, the changes in dimension are in the order of a few tenths of a percent change in volume. [...]
sLHC-Project-Note-0044; CERN-sLHC-Project-Note-0044.- Geneva : CERN, 2016 Fulltext: PDF;

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Drift Tube Linac Conditioning of Tank1 / Shafqat, N (Pakistan Atomic Energy Commission) ; Ramberger, S (-) ; Toor, W A (Pakistan Atomic Energy Commission)
Tank1 of the Drift Tube Linac (DTL) of the Linac4 has been conditioned at the Linac4 tunnel. The tank was tuned for resonance at 352.2 MHz, and stable operation has been achieved with 725 µs long RF pulses at a repetition rate of 1 Hz [...]
sLHC-Project-Note-0043; CERN-sLHC-Project-Note-0043.- Geneva : CERN, 2014 - 6 p. Fulltext: PDF;

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Design of the DC-DC power stage of the capacitor charger for MAXIDISCAP power converters / Cravero, Jean-Marc
This technical report presents the design of the DC-DC power stage of the capacitor charger for MAXIDISCAP power converters. The power stage is based on a half bridge series resonant converter in Discontinuous Conduction Mode (DCM). [...]
sLHC-Project-Note-0042; CERN-sLHC-Project-Note-0042.- Geneva : CERN, 2013 - 29 p. Fulltext: PDF;

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Upgrade of the TCDQ: A dumping protection system for the LHC / Antonakakis, T ; Maglioni, C
In the context of the LHC, an asynchronous beam dump could be destructive. In order to ensure the safety of the machine and its surroundings a model of the TCDQ dump has been designed [...]
sLHC-Project-Note-0041; CERN-sLHC-Project-Note-0041.- Geneva : CERN, 2012 - 16 p. Fulltext: PDF;

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Various approaches to electromagnetic field simulations for RF cavities / Liu, C (Technische Universität Darmstadt) ; Müller, W F O (Technische Universität Darmstadt) ; Ackermann, W (Technische Universität Darmstadt) ; Weiland, T (Technische Universität Darmstadt)
In the Superconducting Proton Linac (SPL) cavity, it is very important to calculate the eigenmodes precisely, because many higher order modes (HOMs) can lead to particle beam instabilities. We used and compared three different ways to calculate the eigenmodes in the SPL cavity: field simulation with hexahedron mesh in time domain, field simulation with hexahedron mesh in frequency domain and field simulation with tetrahedral mesh and higher order curvilinear elements [...]
sLHC-Project-Note-0040; CERN-sLHC-Project-Note-0040.- Geneva : CERN, 2012 Fulltext: PDF;

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On the possibility of accelerating protons to 50 MeV in LINAC4 and delivering them to the PSB / Lombardi, A ; Vretenar, M
During the LIU kick-off meeting of December 1st 2010 [1] the question was asked whether in case of a major irreparable fault of LINAC2 a sufficient number of protons could be produced by LINAC4 and what beams could be guaranteed by the PSB under these working conditions. A study was made and the results presented at the IEFC workshop [2] [...]
sLHC-Project-Note-0039; CERN-sLHC-Project-Note-0039.- Geneva : CERN, 2012 - 7 p. Fulltext: PDF;

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SPL Transfer Line / Posocco, P A ; Eshraqi, M (ESS Lund) ; Lombardi, A
The study of the longitudinal properties of the beam accelerated by SPL at the injection of the following accelerator is very important to optimize its performance. Therefore we connected the latest version of SPL (5 GeV) to the PS2 with a transfer line previously designed by the TE/ABT-BTP Section making it an example of how to transport the SPL beam out of the very densely built Meyrin site to a place where a following accelerator can be realized..
sLHC-Project-Note-0038; CERN-sLHC-Project-Note-0038.- Geneva : CERN, 2012 Fulltext: PDF;

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Cost estimate for the High Power SPL (HP-SPL) / Gerigk, F
This note gives a cost estimate for the construction of a 5GeV, 4MW High Power H− Linac (SPL) on the CERN site..
sLHC-Project-Note-0037; CERN-sLHC-Project-Note-0037.- Geneva : CERN, 2012 Fulltext: PDF;

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Slim elliptical cavity at 800 MHz for local crab crossing / Ficcadenti, L ; Tuckmantel, J
A slim highly eccentric elliptical Crab cavity with vertical deflection at 800 MHz, compatible to beam line distances everywhere in the LHC ring, was designed. It is a good fall-back solution in case of problems with new compact 400 MHz designs. [...]
sLHC-Project-Note-0036; CERN-sLHC-Project-Note-0036.- Geneva : CERN, 2011 Fulltext: PDF;

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Transverse Emittance reconstruction in presence of space charge and application to the 50 MeV beam of Linac4 / Garcia Tudela, M ; Lombardi, A ; Posocco, P A
During the commissioning stage of Linac4 a test bench is planned to be used in order to characterize the 50 MeV beam after the DTL. Among other parameters, it will be possible to measure the transverse emittance using both the 3 monitors and the quadrupole scan method. [...]
sLHC-Project-Note-0035; CERN-sLHC-Project-Note-0035.- Geneva : CERN, 2011 - 28 p. Fulltext: PDF;

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