HB2014 - List of Authors (Redaelli, S.)

Paper

Title

Page

The High Luminosity Challenge: Potential and Limitations of High-Intensity High-Brightness Beams in the LHC and its Injectors

1

R. De Maria, G. Arduini, D. Banfi, J. Barranco, H. Bartosik, E. Benedetto, R. Bruce, O.S. Brüning, R. Calaga, F. Cerutti, H. Damerau, L.S. Esposito, S.D. Fartoukh, M. Fitterer, R. Garoby, S.S. Gilardoni, M. Giovannozzi, B. Goddard, B. Gorini, K. Hanke, G. Iadarola, M. Lamont, M. Meddahi, B. Mikulec, N. Mounet, E. Métral, Y. Papaphilippou, T. Pieloni, S. Redaelli, L. Rossi, G. Rumolo, E.N. Shaposhnikova, G. Sterbini, E. Todesco, R. Tomás, F. Zimmermann
CERN, Geneva, Switzerland
A. Valishev
Fermilab, Batavia, Illinois, USA

Funding: Research supported by EU FP7 HiLumi LHC - Grant Agreement 284404 and by DOE via the US-LARP program.
High-intensity and high-brightness beams are key ingredients to maximize the integrated luminosity of the LHC and exploit its full potential. This contribution will describe the optimization of the beam and machine parameters to maximize the integrated luminosity for the LHC experiments, by taking into account the expected intensity and brightness reach of the LHC and its injector chain and the capabilities of the detectors for the next run and foreseen upgrade scenarios.

Slides MOXLR01 [2.574 MB]

MOPAB43

Studies on Heavy Ion Losses from Collimation Cleaning at the LHC

138

P.D. Hermes, R. Bruce, J.M. Jowett, S. Redaelli, B. Salvachua, G. Valentino, D. Wollmann
CERN, Geneva, Switzerland

The LHC collimation system protects superconducting magnets from beam losses. By design, it was optimized for the high-intensity proton challenges but so far provided adequate protection also during the LHC heavy-ion runs with 208 Pb 82+ ions up to a beam energy of 4 Z TeV. Ion beam cleaning brings specific challenges due to different physical interactions with the collimator materials and might require further improvements for operation at 7 Z TeV. In this article, we study heavy-ion beam losses leaking out of the LHC collimation system, both in measurement and simulations. The simulations are carried out using both ICOSIM, with a simplified ion physics model implemented, and SixTrack, including more detailed starting conditions from FLUKA but without including online scattering in subsequent collimator hits. The results agree well with measurements overall, although some discrepancies are present. The reasons for the discrepancies are investigated and, on this basis, the requirements for an improved simulation tool are outlined.

THO4AB03

Novel Materials for Collimators at LHC and its Upgrades

438

A. Bertarelli, F. Carra, A. Dallocchio, M. Garlaschè, L. Gentini, P. Gradassi, M. Guinchard, E. Quaranta, S. Redaelli, A. Rossi, O. Sacristan De Frutos
CERN, Geneva, Switzerland
E. Quaranta
Politecnico/Milano, Milano, Italy

Funding: The research leading to these results has received funding from the European Commission under the FP7 Research Infrastructures project EuCARD-2, grant agreement no.312453
Collimators for last-generation particle accelerators like the LHC, must be designed to withstand the close interaction with intense and energetic particle beams, safely operating over an extended range of temperatures in harsh environments, while minimizing the perturbing effects, such as instabilities induced by RF impedance, on the circulating beam. The choice of materials for collimator active components is of paramount importance to meet these requirements, which are to become even more demanding with the increase of machine performances expected in future upgrades, such as the High Luminosity LHC (HL-LHC). Consequently, a far-reaching R&D program has been launched to develop novel materials with excellent thermal shock resistance and high thermal and electrical conductivity, replacing or complementing materials used for present collimators. Molybdenum Carbide - Graphite and Copper-Diamond composites have been so far identified as the most promising materials. The manufacturing methods, properties and application potential of these composites will be reviewed along with the experimental program which is to test their viability when exposed to high intensity particle beams.

Slides THO4AB03 [9.405 MB]

Paper	Title	Page
MOXLR01	The High Luminosity Challenge: Potential and Limitations of High-Intensity High-Brightness Beams in the LHC and its Injectors	1
	R. De Maria, G. Arduini, D. Banfi, J. Barranco, H. Bartosik, E. Benedetto, R. Bruce, O.S. Brüning, R. Calaga, F. Cerutti, H. Damerau, L.S. Esposito, S.D. Fartoukh, M. Fitterer, R. Garoby, S.S. Gilardoni, M. Giovannozzi, B. Goddard, B. Gorini, K. Hanke, G. Iadarola, M. Lamont, M. Meddahi, B. Mikulec, N. Mounet, E. Métral, Y. Papaphilippou, T. Pieloni, S. Redaelli, L. Rossi, G. Rumolo, E.N. Shaposhnikova, G. Sterbini, E. Todesco, R. Tomás, F. Zimmermann CERN, Geneva, Switzerland A. Valishev Fermilab, Batavia, Illinois, USA
	Funding: Research supported by EU FP7 HiLumi LHC - Grant Agreement 284404 and by DOE via the US-LARP program. High-intensity and high-brightness beams are key ingredients to maximize the integrated luminosity of the LHC and exploit its full potential. This contribution will describe the optimization of the beam and machine parameters to maximize the integrated luminosity for the LHC experiments, by taking into account the expected intensity and brightness reach of the LHC and its injector chain and the capabilities of the detectors for the next run and foreseen upgrade scenarios.
	Slides MOXLR01 [2.574 MB]

MOPAB43	Studies on Heavy Ion Losses from Collimation Cleaning at the LHC	138
	P.D. Hermes, R. Bruce, J.M. Jowett, S. Redaelli, B. Salvachua, G. Valentino, D. Wollmann CERN, Geneva, Switzerland
	The LHC collimation system protects superconducting magnets from beam losses. By design, it was optimized for the high-intensity proton challenges but so far provided adequate protection also during the LHC heavy-ion runs with 208 Pb 82+ ions up to a beam energy of 4 Z TeV. Ion beam cleaning brings specific challenges due to different physical interactions with the collimator materials and might require further improvements for operation at 7 Z TeV. In this article, we study heavy-ion beam losses leaking out of the LHC collimation system, both in measurement and simulations. The simulations are carried out using both ICOSIM, with a simplified ion physics model implemented, and SixTrack, including more detailed starting conditions from FLUKA but without including online scattering in subsequent collimator hits. The results agree well with measurements overall, although some discrepancies are present. The reasons for the discrepancies are investigated and, on this basis, the requirements for an improved simulation tool are outlined.

THO4AB03	Novel Materials for Collimators at LHC and its Upgrades	438
	A. Bertarelli, F. Carra, A. Dallocchio, M. Garlaschè, L. Gentini, P. Gradassi, M. Guinchard, E. Quaranta, S. Redaelli, A. Rossi, O. Sacristan De Frutos CERN, Geneva, Switzerland E. Quaranta Politecnico/Milano, Milano, Italy
	Funding: The research leading to these results has received funding from the European Commission under the FP7 Research Infrastructures project EuCARD-2, grant agreement no.312453 Collimators for last-generation particle accelerators like the LHC, must be designed to withstand the close interaction with intense and energetic particle beams, safely operating over an extended range of temperatures in harsh environments, while minimizing the perturbing effects, such as instabilities induced by RF impedance, on the circulating beam. The choice of materials for collimator active components is of paramount importance to meet these requirements, which are to become even more demanding with the increase of machine performances expected in future upgrades, such as the High Luminosity LHC (HL-LHC). Consequently, a far-reaching R&D program has been launched to develop novel materials with excellent thermal shock resistance and high thermal and electrical conductivity, replacing or complementing materials used for present collimators. Molybdenum Carbide - Graphite and Copper-Diamond composites have been so far identified as the most promising materials. The manufacturing methods, properties and application potential of these composites will be reviewed along with the experimental program which is to test their viability when exposed to high intensity particle beams.
	Slides THO4AB03 [9.405 MB]