CERN Accelerating science

SPS and CNGS

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2018-10-17
06:01
Beam measurement of the high frequency impedance sources with long bunches in the CERN Super Proton Synchrotron / Lasheen, A (CERN ; Orsay) ; Argyropoulos, T (CERN) ; Bohl, T (CERN) ; Esteban Müller, J  F (CERN) ; Timko, H (CERN) ; Shaposhnikova, E (CERN)
Microwave instability in the Super Proton Synchrotron (SPS) at CERN is one of the main limitations to reach the requirements for the High Luminosity-LHC project (increased beam intensity by a factor 2). To identify the impedance source responsible of the instability, beam measurements were carried out to probe the SPS impedance. [...]
2018 - 13 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 034401 Fulltext: PDF;

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2018-10-16
06:47
Comprehensive study of beam focusing by crystal devices / Scandale, W (CERN) ; Arduini, G (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Petrucci, S (CERN) ; Redaelli, S (CERN) et al.
This paper is devoted to an experimental study of focusing and defocusing positively charged particle beams with the help of specially bent single crystals. Four crystals have been fabricated for this purpose. [...]
2018 - 11 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 014702 Fulltext: PDF;

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2018-10-12
14:26
Natural sources of geomagnetic field variations / Heilig, Balázs (Mining and Geological Survey of Hungary, Tihany, Hungary) ; Beggan, Ciarán (British Geological Survey, United Kingdom) ; Lichtenberger, János (Eötvös University, Budapest, Hungary)
The Earth’s magnetic field is a dynamic system and varies on a wide spectrum of timescales from microseconds to hundreds of millions of years. [...]
CERN-ACC-2018-0033 ; CLIC-Note-1083.
- 2018. - 16 p.
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2018-10-11
14:05
Beam 2 Crystal Characterization Measurements with Proton Beams in the LHC / Rossi, Roberto (Sapienza Universita e INFN, Roma I (IT)) ; Aberle, Oliver (CERN) ; Andreassen, Odd Oyvind (CERN) ; Butcher, Mark (CERN) ; Dionisio Barreto, Cristovao Andre (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (University of Manchester (GB)) ; Montesano, Simone ; Lamas Garcia, Inigo (CERN) ; Redaelli, Stefano (CERN) et al.
In 2017, two new crystals were installed, with their goniometers, in the counterclockwise Beam 2 (B2) line [...]
CERN-ACC-NOTE-2018-0067.
- 2018. - 11 p.
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2018-10-11
05:15
Slow Extraction of Charged Ion Pulses from the REXEBIS / Bidault, Niels (CERN) ; Rodriguez, Jose Alberto (CERN) ; Lozano, Miguel (CERN) ; Sadovich, Sergey (CERN)
The Isotope mass Separator On-Line DEvice (ISOLDE) facility located at CERN, produces and transports Radioactive Ion Beams (RIBs) at low or high energy through the REX/HIE-ISOLDE linear accelerator, for nuclear physics, astrophysics, solid-state physics and applied-physics purposes. Increasing the charge state of the ions is a prerequisite for efficient acceleration and is accomplished by an Electron Beam Ion Source (REXEBIS). [...]
arXiv:1808.02713.- 2018-09-21 - Published in : AIP Conf. Proc. 2011 (2018) 070009 Fulltext: PDF;
In : International Conference on Ion Sources, CERN Geneva , Geneva, Switzerland, 15 - 20 Oct 2017, pp.070009

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2018-10-10
10:18
Thermal control for the two-beam module of the compact linear collider with computational fluid dynamics simulations of conjugate heat transfer problems, with subsidiary finite-element simulations / Lam, Edmond (ETH Zurich (CH)) ; Vamvakas, Alex (National Technical Univ. of Athens (GR)) ; Aicheler, Markus (Helsinki Institute of Physics (FI)) ; Vainola, Jukka Ilmari (Helsinki Institute of Physics (FI)) ; Doebert, Steffen (CERN)
Conjugate heat transfer simulations were performed for the two-beam module of the Compact Linear Collider (CLIC). [...]
CERN-ACC-2018-0031 ; CLIC-Note-1081.
- 2018. - 130 p.
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2018-10-03
17:32
Beam diagnostics of the transfer lines / Schneider, G C
CERN-PS-BT-83-04.
- 1983. - 80 p.
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2018-09-29
06:15
Application of Machine Learning for the IPM-Based Profile Reconstruction / Sapinski, Mariusz (Darmstadt, GSI) ; Singh, Rahul (Darmstadt, GSI) ; Storey, James (CERN) ; Vilsmeier, Dominik (Darmstadt, GSI)
One of the most reliable devices to measure the transverse beam profile in hadron machines is Ionization Profile Monitor (IPM). This type of monitor can work in two modes: collecting electrons or ions. [...]
2018 - 6 p. - Published in : 10.18429/JACoW-HB2018-THA2WE02 Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.THA2WE02

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2018-09-29
06:15
Requirements and Results for Quadrupole Mode Measurements / Oeftiger, Adrian (CERN)
Direct space charge may be quantified, and hence the beam brightness observed, by measuring the quadrupolar beam modes in the CERN Proton Synchrotron (PS). The spectrum of the transverse beam size oscillations (i.e. [...]
2018 - 6 p. - Published in : 10.18429/JACoW-HB2018-THA1WE02 Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.THA1WE02

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2018-09-29
06:15
Effect of the Extraction Kickers on the Beam Stability in the CERN SPS / Farricker, Aaron (CERN) ; Beck, Mario (CERN) ; Repond, Joël (CERN) ; Vollinger, Christine (CERN)
Longitudinal beam instability in the CERN SPS is a major limitation in the ability to achieve the bunch intensities required for the goals of the High-Luminosity LHC project (HL-LHC). One of the major drivers in limiting the intensity of the machine is the broadband contribution to the beam-coupling impedance due to the kicker magnets. [...]
2018 - 6 p. - Published in : 10.18429/JACoW-HB2018-TUP2WA05 Fulltext: PDF;
In : 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejeon, Korea, 17 - 22 Jun 2018, pp.TUP2WA05

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