CERN Accelerating science

Projects, Upgrade and Consolidation Projects

Последно добавени:
2017-01-19
18:14
ATS MD’s in 2016 / Fartoukh, Stephane (CERN) ; Albert, Markus (CERN) ; Le Borgne, Yannick (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Garcia-Tabares Valdivieso, Ana (Ministere des affaires etrangeres et europeennes (FR)) ; Fuchsberger, Kajetan (CERN) ; Giachino, Rossano (CERN) et al.
This report presents a summary of the Achromatic Telescopic Squeezing (ATS) scheme related activities which took place in 2016, where a new generation of ATS pre-squeezed and telescopic optics was successfully probed, namely: (i) down to a beta* of 10 cm with pilot bunches, and (ii) with more emphasis at intermediate beta* values of 40 cm or 33 cm where collisions were established with nominal bunches, the triplet aperture was measured and collimation measurements with pre-squeezed or moderately telescopic ATS optics were conducted..
CERN-ACC-2017-0003.
- 2016. - 25 p.
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2017-01-16
16:04
MD 1266: Injection of "high performance reach" 80b 25 ns beam / Bartmann, Wolfgang (CERN) ; Fraser, Matthew Alexander (CERN) ; Iadarola, Giovanni (CERN) ; Kain, Verena (CERN) ; Velotti, Francesco Maria (CERN) ; Muller, Jeremy Alfred
This note summarises the measurements and observations performed during the LHC Machine Development concerning the injection of batches of 80 bunches for future “high performance reach” of the LHC [...]
CERN-ACC-NOTE-2017-0003.
- 2017. - 9 p.
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2017-01-16
15:58
MD 1242: Injection and emittance preservation / Bartosik, Hannes (CERN) ; Bravin, Enrico (CERN) ; Iadarola, Giovanni (CERN) ; Kain, Verena (CERN) ; Trad, Georges (CERN) ; Velotti, Francesco Maria (CERN)
This note summarises the measurements and observations performed during the LHC Machine Development concerning the injection and emittance preservation studies with BCMS beam [...]
CERN-ACC-NOTE-2017-0002.
- 2017. - 9 p.
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2016-12-14
09:45
Longitudinal Space Charge in the SPS / Lasheen, Alexandre (CERN)
Longitudinal instabilities due to the SPS beam coupling impedance are a major issue for future projects and it is essential to have an accurate SPS impedance model to study them. [...]
CERN-ACC-NOTE-2016-0074.
- 2016.
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2016-12-06
17:23
Conceptual design report on a charge breeder for HIE-ISOLDE / Shornikov, Andrey (CERN) ; Beebe, Edward (Brookhaven) ; Breitenfeldt, Martin (CERN) ; Pitters, Johanna (CERN) ; Mertzig, Robert (CERN) ; Pikin, Alexander (Brookhaven) ; Wenander, Fredrik (CERN)
In this conceptual design report the possible options for an upgrade of the REX/HIE-ISOLDE charge breeder are discussed. [...]
CERN-ACC-NOTE-2016-0073 ; arXiv:1701.00687.
- 2016. - 35 p.
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2016-12-02
17:20
Parameters for aperture calculations at injection for HL-LHC* / Bruce, Roderik (CERN) ; Bracco, Chiara (CERN) ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Redaelli, Stefano (CERN) ; Tomas Garcia, Rogelio (CERN) ; Velotti, Francesco Maria (CERN) ; Wenninger, Jorg (CERN)
Accurate evaluations of the margins of available aperture in the LHC and HL-LHC are very important, in order to judge if proposed optics and hardware are adequate, and to push the machine performance. [...]
CERN-ACC-2016-0328.
- 2016. - 25 p.
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2016-10-26
11:21
Cavity Voltage Phase Modulation MD / Mastoridis, Themistoklis (California Polytechnic State Univ. (US)) ; Baudrenghien, Philippe (CERN) ; Molendijk, John (CERN) ; Timko, Helga (CERN)
The LHC RF/LLRF system is currently configured for extremely stable RF voltage to minimize transient beam loading effects. [...]
CERN-ACC-NOTE-2016-0061.
- 2016. - 6 p.
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2016-09-26
17:46
Case study of a magnetic system for low-energy machines / Schoerling, Daniel (CERN)
The extra low-energy antiproton ring (ELENA) is a CERN particle decelerator with the purpose to deliver antiprotons at lowest energies aiming to enhance the study of antimatter. The hexagonal shaped ring with a circumference of about 30 m will decelerate antiprotons from momenta of 100 to 13.7 MeV/c. [...]
CERN-ACC-2016-0114.- Geneva : CERN, 2016 - 17 p. - Published in : Phys. Rev. Spec. Top. Accel. Beams 19 (2016) 1-17 APS Open Access article: PDF; Fulltext: PDF;

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2016-07-25
11:01
Intensity effects in the formation of stable islands in phase space during the multi-turn extraction process at the CERN PS / machida, Shinji (Rutherford) ; Prior, Chris (Rutherford) ; Gilardoni, Simone (CERN) ; Giovannozzi, Massimo (CERN) ; Hirlander, Simon (CERN ; TU Vienna) ; Huschauer, Alexander (CERN ; TU Vienna)
The CERN PS utilises a Multi-Turn Extraction (MTE) scheme to stretch the beam pulse length to optimise the filling process of the SPS. [...]
CERN-ACC-2016-0102.
- 2016. - 6 p.
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2016-07-20
14:05
Transverse beam splitting made operational: Recent progress of the multi-turn extraction at the CERN proton synchrotron / Huschauer, Alexander (CERN) ; Borburgh, Jan (CERN) ; Damjanovic, Sanja (CERN) ; Gilardoni, Simone (CERN) ; Giovannozzi, Massimo (CERN) ; Hourican, Michael (CERN) ; Kahle, Karsten (CERN) ; Michels, Olivier (CERN) ; Sterbini, Guido (CERN) ; Hernalsteens, Cedric (CERN) et al.
Following a successful commissioning period, the Multi-Turn Extraction (MTE) at the CERN Proton Synchrotron (PS) has been applied for the fixed-target physics programme at the Super Proton Synchrotron (SPS) since September 2015. [...]
CERN-ACC-2016-0100.
- 2016. - 7 p.
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