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1.
Design, construction, and beam tests of a rotatable collimator prototype for high-intensity and high-energy hadron accelerators / Markiewicz, T (SLAC) ; Bong, E (SLAC) ; Keller, L (SLAC) ; Smith, J (SLAC) ; Aberle, O (CERN) ; Accettura, C (CERN) ; Bertarelli, A (CERN) ; Berthome, E (CERN) ; Biancacci, N (CERN) ; Butcher, M (CERN) et al.
A rotatable-jaw collimator design was conceived as a solution to recover from catastrophic beam impacts which would damage a collimator at the Large Hadron Collider (LHC) or its High-Luminosity upgrade (HL-LHC). One such rotatable collimator prototype was designed and built at SLAC and delivered to CERN for tests with LHC-type circulating beams in the Super Proton Synchrotron (SPS). [...]
2019 - 15 p. - Published in : Phys. Rev. Accel. Beams 22 (2019) 123002
2.
Positron driven muon source for a muon collider / Alesini, D. (Frascati) ; Antonelli, M. (Frascati) ; Biagini, M.E. (Frascati) ; Boscolo, M. (Frascati) ; Blanco-García, O.R. (Frascati) ; Ciarma, A. (Frascati) ; Cimino, R. ; Iafrati, M. ; Giribono, A. (Frascati) ; Guiducci, S. (Frascati) et al.
The design of a future multi-TeV muon collider needs new ideas to overcome the technological challenges related to muon production, cooling, accumulation and acceleration. [...]
arXiv:1905.05747.
- 2019. - 18 p.
Fulltext
3.
Muon Accumulator Ring Requirements for a Low Emittance Muon Collider from Positrons on Target / Boscolo, Manuela (Frascati) ; Antonelli, Mario (Frascati) ; Blanco-García, Oscar (Frascati) ; Collamati, Francesco (INFN, Rome) ; Guiducci, Susanna (Frascati) ; Keller, Lewis (SLAC) ; Liuzzo, Simone (ESRF, Grenoble) ; Raimondi, Pantaleo (ESRF, Grenoble) ; Schulte, Daniel (CERN)
Very low emittance muon beams can be produced by direct annihilation of about 45~GeV positrons on atomic electrons in a thin target. With such a muon beam source, a mu+mu- collider can be designed in the multi-TeV range at very high luminosities. [...]
CERN-ACC-2018-073.- 2018 - 4 p. - Published in : 10.18429/JACoW-IPAC2018-MOPMF087 Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.MOPMF087
4.
Studies of a scheme for low emittance muon beam production from positrons on target / Collamati, Francesco (INFN, Rome) ; Antonelli, Mario (Frascati) ; Boscolo, Manuela (Frascati) ; Biagini, Marica (Frascati) ; Blanco-Garcia, Oscar (Frascati) ; Variola, Alessandro (Frascati) ; Bacci, Alberto (INFN, Milan) ; Liuzzo, Simone (ESRF, Grenoble) ; Raimondi, Pantaleo (ESRF, Grenoble) ; Chaikovska, Iryna (Orsay, LAL) et al.
A new scheme to produce muon beams characterised by very low emittance, in such a way to avoid the need for cooling, using a positron beam of about 45 GeV interacting on electrons on target is being studied by our group. This scheme is challenging and innovative, and needs a full design study to be developed. [...]
SISSA, 2018 - 8 p. - Published in : PoS EPS-HEP2017 (2017) 531 Fulltext: PDF; External link: PoS server
In : 2017 European Physical Society Conference on High Energy Physics, Venice, Italy, 05 - 12 Jul 2017, pp.531
5.
Linear Collider Physics Resource Book for Snowmass 2001 - Part 1: Introduction / Abe, T. (SLAC) ; Arkani-Hamed, N. (LBL, Berkeley) ; Asner, D. (LLNL, Livermore) ; Baer, H. (Florida State U.) ; Bagger, J. (Johns Hopkins U.) ; Balazs, C. (Hawaii U.) ; Baltay, C. (Yale U.) ; Barker, T. (Colorado U.) ; Barklow, T. (SLAC) ; Barron, J. (Colorado U.) et al.
This Resource Book reviews the physics opportunities of a next-generation e+e- linear collider and discusses options for the experimental program. [...]
hep-ex/0106055 ; BNL-52627 ; CLNS-01-1729 ; LBNL-47813 ; SLAC-R-570 ; UCRL-ID-143810-DR ; LC-REV-2001-074-US ; FERMILAB-PUB-01-058-E.
- 70 p.
Fermilab Library Server (fulltext available) - Full text - Fermilab Library
6.
Linear Collider Physics Resource Book for Snowmass 2001 - Part 4: Theoretical, Accelerator, and Experimental Options / Abe, T. (SLAC) ; Arkani-Hamed, N. (LBL, Berkeley) ; Asner, D. (LLNL, Livermore) ; Baer, H. (Florida State U.) ; Bagger, J. (Johns Hopkins U.) ; Balazs, C. (Hawaii U.) ; Baltay, C. (Yale U.) ; Barker, T. (Colorado U.) ; Barklow, T. (SLAC) ; Barron, J. (Colorado U.) et al.
This Resource Book reviews the physics opportunities of a next-generation e+e- linear collider and discusses options for the experimental program. [...]
hep-ex/0106058 ; BNL-52627 ; CLNS-01-1729 ; FERMILAB-PUB-01-550-E ; LBNL-47813 ; SLAC-R-570 ; UCRL-ID-143810-DR ; LC-REV-2001-074-US.
- 136 p.
Fermilab Library Server (fulltext available) - Full text - Fulltext - Fermilab Library
7.
Studies of a Scheme for Low Emittance Muon Beam Production From Positrons on Target / Boscolo, Manuela (Frascati) ; Antonelli, Mario (Frascati) ; Bacci, Alberto (INFN, Milan) ; Biagini, Maria (Frascati) ; Blanco-García, Oscar (Frascati) ; Chaikovska, Iryna (Orsay, LAL) ; Chehab, Robert (Orsay, LAL) ; Collamati, Francesco (INFN, Rome) ; Iafrati, Matteo (ENEA, Frascati) ; Keller, Lewis (SLAC) et al.
We are studying a new scheme to produce very low emittance muon beams using a positron beam of about 45 GeV interacting on electrons on target. This is a challenging and innovative scheme that needs a full design study. [...]
IPAC-2017-WEOBA3; CERN-ACC-2017-189.- 2017 - 4 p. - Published in : 10.18429/JACoW-IPAC2017-WEOBA3 Fulltext: PDF; External link: JACoW
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.WEOBA3
8.
Construction and bench testing of a prototype rotatable collimator for the LHC / Markiewicz, T (SLAC) ; Bong, E (SLAC) ; Keller, L (SLAC) ; Aberle, O (CERN) ; Bertarelli, A (CERN) ; Gradassi, P (CERN) ; Marsili, A (CERN) ; Redaelli, S (CERN) ; Rossi, A (CERN) ; Salvachua, B (CERN) et al.
A second generation prototype rotatable collimator has been fabricated at SLAC and delivered to CERN for further vacuum, metrology, function and impedance tests. The design features two cylindrical Glidcop jaws designed to each absorb 12 kW of beam in steady state and up to 60 kW in transitory beam loss with no damage and minimal thermal distortion [1]. [...]
CERN-ACC-2014-0181.- Geneva : CERN, 2014 - 4 p. Published version from JaCoW: PDF; External link: 401926
In : 5th International Particle Accelerator Conference, Dresden, Germany, 15 - 20 Jun 2014, pp.178
9.
Recent Progress on the Design of a Rotatable Copper Collimator for the LHC Collimation Upgrade / Smith, J C (SLAC) ; Keller, L (SLAC) ; Lundgren, S (SLAC) ; Markiewicz, T W (SLAC) ; Lari, L (EPFL-ISIC ; CERN)
The Phase II up­grade to the LHC col­li­ma­tion sys­tem calls for com­ple­ment­ing the 30 high ro­bust Phase I graphite col­li­ma­tors with 30 high Z Phase II col­li­ma­tors. One op­tion is to use metal­lic ro­tat­able col­li­ma­tors and this de­sign will be dis­cussed here. [...]
SLAC-PUB-13743.- 2010 Published version from PAC09: PDF;
In : Particle Accelerator Conference 2009, Vancouver, Canada, 04 - 08 May 2009, pp.WE6RFP030
10.
Comparison of carbon and HI-Z primary collimators for the LHC phase II collimation system   / Keller, L (SLAC) ; Markiewicz, T (SLAC) ; Smith, J (SLAC) ; Assmann, R (CERN) ; Bracco, C (CERN) ; Weiler, T (Karlsruhe, Inst. Technol. )
WP: 8: Collimators & materials for higher beam power beam
Task: 8.1: ColMat Coordination & Communication

A current issue with the LHC collimation system is single-diffractive, off-energy protons from the primary collimators that pass completely through the secondary collimation system and are absorbed immediately downbeam in the cold magnets of the dispersion suppressor section. [...]
EuCARD-CON-2010-066.
- 2010.
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61 Keller, L
16 Keller, L D
20 Keller, L P
1 Keller, L.P.
1 Keller, Laura Gioia Andrea
1 Keller, Laurie
1 Keller, Laurie S
9 Keller, Lewis
1 Keller, Lindsay
2 Keller, Luke
7 Keller, Luke D
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