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2021-01-27
06:31
Chapter 13: Beam instrumentation and long-range beam–beam compensation / Jones, R (CERN) ; Bravin, Enrico (CERN) ; Lefevre, Thibault (CERN) ; Veness, Raymond (CERN)
The extensive array of beam instrumentation with which the LHC is equipped has played a major role in its commissioning, rapid intensity ramp-up and safe and reliable operation. [...]
2020. - 14 p.
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2021-01-27
06:31
Chapter 2: Machine layout and performance / Arduini, G (CERN) ; Bruce, R (CERN) ; De Maria, R (CERN) ; Giovannozzi, M (CERN) ; Iadarola, G (CERN) ; Jowett, J (CERN) ; Métral, E (CERN) ; Papaphilippou, Y (CERN) ; Garcia, R Tomás (CERN)
The goal of the High-luminosity upgrade of the LHC is to deliver an integrated luminosity of at least 250 fb-1 per year (assuming at least 160 days of operation at high-luminosity) in each of the two high-luminosity general-purpose detectors, ATLAS and CMS, located at the interaction points (IP) 1 and 5, respectively. [...]
2020. - 30 p.
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2021-01-27
06:31
Chapter 1: High-Luminosity Large Hadron Collider / Brüning, O (CERN) ; Rossi, L (CERN ; U. Milan (main) ; LASA, Segrate)
The Large Hadron Collider (LHC) was successfully commissioned in 2010 for proton–proton collisions with a 7 TeV centre-of-mass (c.o.m.) energy. [...]
16 p.
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2021-01-27
06:31
Chapter 3: Insertion Magnets / Todesco, E (CERN) ; Ferracin, P (CERN)
In general, magnets will be tested individually in a vertical test station, and then horizontally in the final cold mass assembly within the final cryostat, with the exception of Q2 and D2 whose length does not allow vertical testing. [...]
2020. - 18 p.
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2021-01-27
06:31
Chapter 4: RF systems / Calaga, R (CERN) ; Baudrenghien, P (CERN) ; Capatina, Ofelia (CERN) ; Jensen, Erk (CERN) ; Montesinos, Eric (CERN)
The HL-LHC beams are injected, accelerated, and stored to their nominal energy of 7 TeV by the existing 400 MHz superconducting RF system of the LHC. A novel superconducting RF system consisting of eight cavities per beam for transverse deflection (aka crab cavities) of the bunches will be used to compensate the geometric loss in luminosity due to the non-zero crossing angle and the extreme focusing of the bunches in the HL-LHC. Due to doubling of the beam currents in the HL-LHC era, an optimal detuning scheme (aka full- detuning) is required to cope with the transient beam loading effects. [...]
2020. - 22 p.
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2021-01-27
06:31
Chapter 5: Collimation system / Redaelli, Stefano (CERN) ; Bruce, Roderik (CERN) ; Lechner, Anton (CERN) ; Mereghetti, Alessio (CERN)
A variety of processes can cause unavoidable beam losses during normal and abnormal beam operation. [...]
2020. - 27 p.
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2021-01-27
06:31
Chapter 6: Circuit layout, powering and protection / Rodríguez Mateos, F (CERN) ; Catalão Rolhas da Rosa, T D (CERN) ; Menéndez Cámara, F (CERN) ; Yammine, S (CERN) ; Zerlauth, Markus (CERN)
During LS2 and LS3, the HL-LHC upgrade will impose many changes to the magnet circuits of the LHC long- straight sections at points 1 and 5. [...]
2020. - 14 p.
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2021-01-27
06:31
Chapter 6A: Cold powering of the superconducting circuits / Ballarino, Amalia (CERN) ; Cruikshank, Paul (CERN) ; Fleiter, Jerome Christophe (CERN) ; Leclercq, Yann Raphael Bruno (CERN) ; Parma, V (CERN) ; Yang, Y (U. Southampton (main))
For the HL-LHC project, a novel concept for the cold powering of superconducting magnets has been developed. [...]
2020. - 9 p.
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2021-01-27
06:31
Chapter 6B: Warm powering of the superconducting circuits / Martino, M (CERN) ; Burnet, J-P (CERN) ; Cerqueira Bastos, M   (CERN) ; Herrero Gonzales, V R   (CERN) ; Kuczerowski, N (CERN) ; Pittet, S (CERN) ; Thiesen, H (CERN) ; Thurel, Y (CERN) ; Todd, B (CERN) ; Yammine, S (CERN)
The warm powering of the HL-LHC involves the new circuits of the Inner Triplets and the Separation/Recombination magnets in Point 1 and Point 5, the powering of the 11 T magnets in Point 7, and the final R2E consolidation phase in LS3. [...]
2020. - 14 p.
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2021-01-27
06:31
Chapter 7: Machine protection / Wollmann, D (CERN) ; Denz, R (CERN) ; Lindstrom, B (CERN) ; Ravaioli, E (CERN) ; Rodriguez Mateos, F   (CERN) ; Siemko, A (CERN) ; Uythoven, J (CERN) ; Verweij, A (CERN) ; Will, A (CERN) ; Zerlauth, M (CERN)
Since the previous TDR version 0.1, the hardware development has made significant progress. [...]
2020. - 16 p.
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