CERN Accelerating science

CLIC Notes

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2018-10-12
14:35
RF design of accelerating structure for the main linac of the klystron-based first stage of CLIC at 380 GeV / Liu, Jiayang (Tsinghua University, Beijing, China; CERN, Geneva, Switzerland) ; Grudiev, Alexej (CERN)
An alternative klystron-based scenario for the first stage of Compact Linear Collider (CLIC) at 380 GeV center-of-mass energy was proposed. [...]
CERN-ACC-2018-0034 ; CLIC-Note-1082.
- 2018. - 16 p.
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2018-10-12
14:26
Natural sources of geomagnetic field variations / Heilig, Balázs (Mining and Geological Survey of Hungary, Tihany, Hungary) ; Beggan, Ciarán (British Geological Survey, United Kingdom) ; Lichtenberger, János (Eötvös University, Budapest, Hungary)
The Earth’s magnetic field is a dynamic system and varies on a wide spectrum of timescales from microseconds to hundreds of millions of years. [...]
CERN-ACC-2018-0033 ; CLIC-Note-1083.
- 2018. - 16 p.
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2018-10-10
10:18
Thermal control for the two-beam module of the compact linear collider with computational fluid dynamics simulations of conjugate heat transfer problems, with subsidiary finite-element simulations / Lam, Edmond (ETH Zurich (CH)) ; Vamvakas, Alex (National Technical Univ. of Athens (GR)) ; Aicheler, Markus (Helsinki Institute of Physics (FI)) ; Vainola, Jukka Ilmari (Helsinki Institute of Physics (FI)) ; Doebert, Steffen (CERN)
Conjugate heat transfer simulations were performed for the two-beam module of the Compact Linear Collider (CLIC). [...]
CERN-ACC-2018-0031 ; CLIC-Note-1081.
- 2018. - 130 p.
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2018-10-09
10:57
High power testing of a prototype clic structure: Td26cc r05 n3 / Lucas, Thomas Geoffrey (University of Melbourne (AU)) ; Volpi, Matteo (University of Melbourne (AU)) ; Giansiracusa, Paul Joseph (University of Melbourne (AU)) ; Rassool, Roger Paul (Australian Synchrotron (AU)) ; Argyropoulos, Theodoros (CERN) ; Bursali, Hikmet (CERN) ; Catalan-Lasheras, Nuria (CERN) ; Grudiev, Alexej (CERN) ; Mcmonagle, Gerard (CERN) ; Syrachev, Igor (CERN) et al.
Testing of high gradient accelerating structure prototypes for the Compact Linear Collider is ongoing at CERN. [...]
CERN-ACC-2018-0030 ; CLIC-Note-1080.
- 2018. - 9 p.
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2018-10-09
10:39
Radiation damage to permanent magnet materials: A survey of experimental results / Shepherd, Ben (ASTeC, STFC Daresbury Laboratory, Warrington, UK)
A large fraction of the total power consumption of the CLIC machine is taken up by electro- magnets. [...]
CERN-ACC-2018-0029 ; CLIC-Note-1079.
- 2018. - 9 p.
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2018-10-02
09:31
Effect of an externally applied magnetic field on the breakdown rate in ultra-high vacuum measured in the "large electrode system" at CERN / Shipman, Nicholas (CERN) ; Profatilova, Iaroslava (CERN) ; Perez Fontenla, Ana Teresa (CERN) ; Wuensch, Walter (CERN) ; Calatroni, Sergio (CERN)
The influence of external magnetic fields of up to 0.5 T on the breakdown rate between copper electrodes, subjected to pulsed DC voltages in ultra-high vacuum, is investigated. [...]
CERN-ACC-2018-0028 ; CLIC-Note-1078.
- 2017. - 13 p.
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2017-10-18
06:37
Ultimate Field Gradient in Metallic Structures / Wuensch, Walter (CERN)
Significant progress has been made over the past decade by studies of normal-conducting linear colliders, NLC/JLC (Next/Japanese Linear Collider) and CLIC (Compact Linear Collider), to raise achievable accelerating gradient from the range of 20-30 MV/m up to 100-120 MV/m. The gain has come through a greatly increased understanding of high-power rf phenomena, development of quantitative high-gradient rf design methods, refinements in cavity fabrication techniques and through development of high peak rf power sources. [...]
CERN-ACC-2017-111; CLIC-Note-1111.- 2017 - 6 p. - Published in : 10.18429/JACoW-IPAC2017-MOYCA1 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOYCA1

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2017-10-18
06:37
Tuning-Based Design Optimization of CLIC Final Focus System at 3 TeV / Plassard, Fabien (CERN) ; Bambade, Philip (Orsay, LAL) ; Latina, Andrea (CERN) ; Marín, Eduardo (CERN) ; Schulte, Daniel (CERN) ; Tomás, Rogelio (CERN)
The tuning aims to mitigate static imperfections of the Final Focus System (FFS) for emittance preservation at the Interaction Point (IP). A simulation campaign on the nominal CLIC FFS at 3 TeV have shown the need of rethink the design in order to ease the tuning of the machine. [...]
CERN-ACC-2017-133; CLIC-Note-1108.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-MOPIK099 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPIK099

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2017-10-14
06:11
Design and Construction of a High-Gradient RF Lab at IFIC-Valencia / Vnuchenko, Anna (Valencia U., IFIC) ; Argyropoulos, Theodoros (Valencia U., IFIC) ; Blanch Gutiérrez, Cesar (Valencia U., IFIC) ; Catalán Lasheras, Nuria (CERN) ; Esperante Pereira, Daniel (Valencia U., IFIC) ; Faus-Golfe, Angeles (Orsay, LAL) ; Giner Navarro, Jorge (Valencia U., IFIC) ; McMonagle, Gerard (CERN) ; Syratchev, Igor (CERN) ; Wuensch, Walter (CERN)
The IFIC High-Gradient (HG) Radio Frequency (RF) laboratory is designed to host a high-power infrastructure for testing HG S-band normal-conducting RF accelerating structures and has been under construction since 2016. The main objective of the facility is to develop HG S-band accelerating structures and to contribute to the study of HG phenomena. [...]
CERN-ACC-2017-263; CLIC-Note-1110.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-THPIK081 Fulltext: thpik081_2 - PDF; thpik081 - PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.THPIK081

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2017-10-06
06:51
Diffraction Radiation for Non-Invasive, High-Resolution Beam Size Measurements in Future Linear Colliders / Bergamaschi, Michele (CERN ; JAI, UK ; Royal Holloway, U. of London) ; Aryshev, Alexander (KEK, Tsukuba) ; Karataev, Pavel (Royal Holloway, U. of London ; JAI, UK) ; Kieffer, Robert (CERN) ; Kruchinin, Konstantin (Royal Holloway, U. of London ; JAI, UK) ; Lefèvre, Thibaut (CERN) ; Mazzoni, Stefano (CERN) ; Terunuma, Nobuhiro (KEK, Tsukuba)
Next generation linear colliders such as the Compact Linear Collider (CLIC) or the International Linear Collider (ILC) will accelerate particle beams with extremely small emittance. The high current and small size of the beam (micron-scale) due to such small emittance require non-invasive, high-resolution techniques for beam diagnostics. [...]
CERN-ACC-2017-293; CLIC-Note-1109.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-MOPAB111 Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPAB111

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