CERN Accelerating science

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2017-11-18
06:51
Field Quality Measurements in the FNAL Twin-Aperture 11 T Dipole for LHC Upgrades / Strauss, T (Fermilab) ; Apollinari, G (Fermilab) ; Barzi, E (Fermilab) ; Chlachidze, G (Fermilab) ; Di Marco, J (Fermilab) ; Nobrega, F (Fermilab) ; Novitski, I (Fermilab) ; Stoynev, S (Fermilab) ; Turrioni, D (Fermilab) ; Velev, G (Fermilab) et al.
FNAL and CERN are developing an 11 T Nb3Sn dipole suitable for installation in the LHC to provide room for additional collimators. Two 1 m long collared coils previously tested at FNAL in single-aperture dipole configuration were assembled into the twin-aperture configuration and tested including magnet quench performance and field quality. [...]
FERMILAB-CONF-16-520-TD; NAPAC-2016-MOPOB41.- 2017 - 4 p. - Published in : 10.18429/JACoW-NAPAC2016-MOPOB41 Fulltext: PDF; External links: FERMILABCONF; JACoW

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2017-11-15
09:56
Beam test performance of the APV5 chip / de Fez-Laso, M D M (Imperial Coll., London) ; Bonaccorso, C (Imperial Coll., London) ; Gill, K (Imperial Coll., London) ; Hall, G (Imperial Coll., London) ; Iles, G (Imperial Coll., London) ; MacEvoy, B (Imperial Coll., London) ; Millmore, M (Imperial Coll., London) ; Potts, A (Imperial Coll., London) ; Raymond, M (Imperial Coll., London) ; French, M (Rutherford) et al.
The performance of the latest prototype of the radiation hard front end chip to be used by the CMS collaboration for analogue readout of the microstrip tracker has been evaluated with a silicon microstrip detector in a beam at CERN. The circuit, developed by the RD20 collaboration, consists of 128 channels of amplifier, pipeline memory, analogue signal processor and a serial multiplexer. [...]
CMS-TN-96-051; IC-HEP-96-2; IC-HEP-96-02.- 1996 - 22 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 382 (1996) 533-544

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2017-11-14
06:56
Pushing the intensity envelope at the ATLAS linac / Mustapha, Brahim (Argonne) ; Dickerson, Clayton (Argonne) ; Hendricks, Matthew (Argonne) ; Ostroumov, Peter (Argonne) ; Pardo, Richard (Argonne) ; Scott, Robert (Argonne) ; Zinkann, Gary (Argonne)
The ATLAS linac at Argonne National Laboratory has recently been upgraded for higher beam intensity and transport efficiency. Following the installation of the new RFQ, we have performed a high-intensity run using a 40Ar⁸⁺ beam. [...]
2016 - 3 p. - Published in : 10.18429/JACoW-HIAT2015-WEPB05 Fulltext: PDF;
In : 13th International Conference on Heavy Ion Accelerator Technology, Yokohama, Japan, 07-11 Sep 2015, pp.WEPB05

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2017-11-14
06:56
The ATLAS Intensity upgrade: Project overview and online operating experience / Pardo, Richard (Argonne) ; Barcikowski, Albert (Argonne) ; Conway, Zachary (Argonne) ; Dickerson, Clayton (Argonne) ; Hendricks, Matthew (Argonne) ; Kelly, Michael (Argonne) ; Kim, Sang-Hoon (Argonne) ; Luo, Yong (Argonne) ; MacDonald, Stephen (Argonne) ; Mustapha, Brahim (Argonne) et al.
ATLAS, the world's first accelerator to use RF superconductivity for ion acceleration, has undergone a major facility upgrade with the goals of significantly increased stable-beam current for experiments and improved transmission for all beams. The dominant components of the upgrade are a) new CW-RFQ to replace the first three low β resonators, b) a new cryostat of seven β=0.077 quarter-wave resonators demonstrating world-record accelerating fields, c) an improved cryogenics system, and d) the retirement of the original tandem injector. [...]
2016 - 3 p. - Published in : 10.18429/JACoW-HIAT2015-WEM1C03 Fulltext: PDF;
In : 13th International Conference on Heavy Ion Accelerator Technology, Yokohama, Japan, 07-11 Sep 2015, pp.WEM1C03

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2017-11-14
06:56
Integrating the TRACK beam simulation code to improve ATLAS operations / Dickerson, Clayton (Argonne) ; Mustapha, Brahim (Argonne) ; Peters, Christopher (Argonne)
At the Argonne Tandem Linear Accelerator System (ATLAS) we are integrating TRACK, three dimensional particle tracking software that numerically integrates the equations of motion, into the accelerator control system. ATLAS delivers a variety of ions (1 - 238 AMU) at various energies (1 - 15 MeV/u) to multiple targets. [...]
2016 - 3 p. - Published in : 10.18429/JACoW-HIAT2015-WEM1C02 Fulltext: PDF;
In : 13th International Conference on Heavy Ion Accelerator Technology, Yokohama, Japan, 07-11 Sep 2015, pp.WEM1C02

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2017-11-14
06:56
Status and operation of the ATLAS superconducting accelerator / Hendricks, Matthew (Argonne) ; Krupa, Anthony (Argonne) ; Pardo, Richard (Argonne)
ATLAS (the Argonne Tandem Linac Accelerator System) is a super conducting heavy ion accelerator which can accelerate nearly all stable, and some unstable, isotopes between protons and uranium with a charge to mass range of 1/1 to 1/7. The maximum energy ranges of these accelerated ions are 7-17 MeV per nucleon with intensities ranging from a few thousand ions/second to microampere currents. [...]
2016 - 3 p. - Published in : 10.18429/JACoW-HIAT2015-WEM1C01 Fulltext: PDF;
In : 13th International Conference on Heavy Ion Accelerator Technology, Yokohama, Japan, 07-11 Sep 2015, pp.WEM1C01

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2017-11-14
06:56
A fast, compact particle detector for tuning radioactive beams at ATLAS / Dickerson, Clayton (Argonne) ; Deibel, Catherine (LSU, Baton Rouge (main)) ; DiGiovine, Brad (Argonne) ; Hoffman, Calem (Argonne ; ANL, APS) ; Lai, Jianping (LSU, Baton Rouge (main)) ; Lin, Ling-Ying (Argonne) ; Pardo, Richard (Argonne) ; Rehm, Ernst (Argonne ; Argonne, PHY ; Harvard-Smithsonian Ctr. Astrophys. ; MIT) ; Santiago-Gonzalez, Daniel (LSU, Baton Rouge (main) ; Argonne (main) ; Louisiana State U.) ; Savard, Guy (Argonne ; Argonne, PHY ; Chicago U.)
Radioactive ion beams (RIB) at the Argonne Tandem Linear Accelerator System (ATLAS) are produced either from the in-flight method at 5-15 MeV/u for A < 30, or via reacceleration of fission fragments from the CAlifornium Rare Isotope Breeder Upgrade (CARIBU) at 4-10 MeV/u for 80 < A < 160. These RIB are typically accompanied by contaminant beams >100x more intense. [...]
2016 - 3 p. - Published in : 10.18429/JACoW-HIAT2015-MOPA29 Fulltext: PDF;
In : 13th International Conference on Heavy Ion Accelerator Technology, Yokohama, Japan, 07-11 Sep 2015, pp.MOPA29

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2017-11-09
07:57
Compensation of third-harmonic field error in LHC main dipole magnets / Arpaia, Pasquale (Sannio ; CERN) ; Buzio, Marco (CERN) ; Fiscarelli, Lucio (Sannio U. ; CERN) ; Montenero, Giuseppe (Sannio U. ; CERN) ; Garcia Perez, Juan (CERN) ; Walckiers, Louis (CERN)
One of the main requirements for the operations of the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) is a suitable correction of multipole errors in magnetic field. [...]
2010. - 4 p.

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2017-11-08
12:21
MD 979: Beta-beating measurements on colliding beams / Goncalves Jorge, Patrik ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (University of Applied Sciences (DE)) ; Langner, Andy Sven (CERN) ; Medina Medrano, Luis Eduardo (Universidad de Guanajuato (MX)) ; Olexa, Jakub (CERN) et al.
The HL-LHC high brightness beams will give a large β-beating due to the head-on and long-range interactions since a beam-beam parameter of 0.01 per Interaction Point (IP) is expected. [...]
CERN-ACC-NOTE-2017-0060.
- 2017. - 13 p.
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2017-10-28
06:31
Recherche générique de nouvelle physique dans le canal eµ de l'expérience CMS du LHC / Vannerom, David
This work consists of a new physics search beyond the Standard Model using data collected by the CMS detector of the proton-proton collider LHC at CERN [...]
CERN-THESIS-2014-422. - 119 p.

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