CERN Accelerating science

LHC Project Reports

Proton-Nucleus Collisions at the LHC: Scientific Opportunities and Requirements / Salgado, C A (Santiago de Compostela U., IGFAE ; Santiago de Compostela U.) ; Alvarez-Muniz, J (Santiago de Compostela U., IGFAE) ; Arleo, F (Annecy, LAPTH) ; Armesto, N (Santiago de Compostela U., IGFAE) ; Botje, M (NIKHEF, Amsterdam) ; Cacciari, M (Paris, LPTHE) ; Campbell, J (Fermilab) ; Carli, C (CERN) ; Cole, B (Nevis Labs, Columbia U.) ; D'Enterria, D (CERN ; ICC, Barcelona U. ; ICREA, Barcelona) et al.
Proton-nucleus (p+A) collisions have long been recognized as a crucial component of the physics programme with nuclear beams at high energies, in particular for their reference role to interpret and understand nucleus-nucleus data as well as for their potential to elucidate the partonic structure of matter at low parton fractional momenta (small-x). Here, we summarize the main motivations that make a proton-nucleus run a decisive ingredient for a successful heavy-ion programme at the Large Hadron Collider (LHC) and we present unique scientific opportunities arising from these collisions. [...]
arXiv:1105.3919; CERN-PH-TH-2011-119; LHC-PROJECT-REPORT-1181.- Geneva : CERN, 2012 - 33 p. - Published in : J. Phys. G 39 (2012) 015010 External link: Preprint

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The commissioning of the instrumentation for the LHC tunnel cryogenics / Avramidou, R ; Anastasopoulos, K ; Bamis, C ; Casas-Cubillos, J ; Dragoneas, A ; Fampris, X ; Fernandez-Penacoba, G ; Gomes, P ; Gousiou, E ; Jeanmonod, N et al.
The Large Hadron Collider (LHC) at CERN is a superconducting accelerator and proton-proton collider of circumference of 27 km, lying about 100 m underground. [...]
LHC-PROJECT-Report-1182 ; CERN-LHC-PROJECT-Report-1182.
- 2007. - 11 p.
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Betatron Halo Machine induced background for LHCb at 7 TeV / Appleby, R B (CERN) ; Corti, G (CERN) ; Lieng, M ; Macina, D (CERN) ; Talanov, V (CERN)
The physics performance of the LHCb experiment of the LHC will be affected by the experimental background conditions arising from the machine. [...]
LHC-PROJECT-Report-1180 ; CERN-LHC-PROJECT-Report-1180.
- 2010. - 15 p.
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The Impact of Vacuum Gate Valves on the LHC Beam / Appleby, R B (CERN) ; Brugger, M (CERN) ; Cerutti, F (CERN) ; Ferrari, A (CERN) ; Mauri, M (CERN) ; Vlachoudis, V (CERN)
The LHC vacuum sector valves are located in the straight sections of the LHC ring, and designed to sectorize the LHC vacuum. [...]
LHC-PROJECT-Report-1179 ; CERN-LHC-PROJECT-Report-1179.
- 2009. - 15 p.
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Cold Leak Tests of LHC Beam Screens / Collomb-Patton, C (CERN) ; Cruikshank, P (CERN) ; Jenninger, B (CERN) ; Kos, N (CERN)
In order to guide the high energy proton beams inside its two 27 km long vacuum rings, the Large Hadron Collider (LHC) at CERN, Geneva, makes use of superconducting technology to create the required magnetic fields. More than 4000 beam screens, cooled at 7 20 K, are inserted inside the 1.9 K beam vacuum tubes to intercept beam induced heat loads and to provide dynamic vacuum stability. [...]
LHC-PROJECT-Report-1178; CERN-LHC-PROJECT-Report-1178.- Geneva : CERN, 2009 - 6 p. - Published in : Vacuum 84 (2009) 293-297
In : 12th Joint Vacuum Conference, 10th European Vacuum Conference and 7th Annual Meeting of the German Vacuum Society, Balatonalmadi, Hungary, 22 - 26 Sep 2008, pp.293-297

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Beam losses from ultra-peripheral nuclear collisions between $^{208}$Pb$^{82+}$ ions in the Large Hadron Collider and their alleviation / Bruce, R (CERN) ; Gilardoni, S (CERN) ; Jowett, J (CERN) ; Bocian, D (Fermilab)
Electromagnetic interactions between colliding heavy ions at the Large Hadron Collider (LHC) at CERN will give rise to localized beam losses that may quench superconducting magnets, apart from contributing significantly to the luminosity decay. To quantify their impact on the operation of the collider, we have used a three-step simulation approach, which consists of optical tracking, a Monte-Carlo shower simulation and a thermal network model of the heat flow inside a magnet. [...]
arXiv:0908.2527; LHC-PROJECT-Report-1177.- Geneva : CERN, 2009 - 17 p. - Published in : Phys. Rev. Spec. Top. Accel. Beams 12 (2009) 071002 APS Published version, local copy: PDF; External link: Preprint

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LHC Circulating Beam Accidents for near-beam Detectors / Appleby, R B (CERN)
The LHC stored beam contains 362 MJ of energy at the top beam energy of 7 TeV, offering considerable risk to the accelerator components and detectors of the machine. [...]
LHC-PROJECT-Report-1176 ; CERN-LHC-PROJECT-Report-1176.
- 2009. - 18 p.
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ALICE Injected Beam Accidents / Appleby, R B (CERN)
The ALICE (point 2) interaction region is sensitive to beam orbit errors arising from magnet setting errors on injection. [...]
LHC-PROJECT-Report-1175 ; CERN-LHC-PROJECT-Report-1175.
- 2009. - 20 p.
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LHCb Injected Beam Accidents / Appleby, R B (CERN)
The LHCb (point 8) interaction region is sensitive to beam orbit errors arising from magnet setting errors on injection. [...]
LHC-PROJECT-Report-1174 ; CERN-LHC-PROJECT-Report-1174.
- 2009. - 27 p.
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SM18 Magnet Tests Overview : Efficiency Analysis and Critique / Chohan, V (CERN)
Testing of superconducting magnets for Large Hadron Collider (LHC) is nearing completion in SM18 Test Facility. [...]
LHC-PROJECT-Report-1173 ; CERN-LHC-PROJECT-Report-1173.
- 2007. - 10 p.
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