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CERN Accelerating science

All PS Complex

Posledne pridané:
2021-03-26
12:11
Local beating corrections with orbit bumps in the LHC / Wolf, Dominik Werner
The purpose of this Master thesis is to explore further possibilities to increase the Luminosity of the Large Hadron Collider (LHC) by improving the optics correction [...]
CERN-THESIS-2021-024 - 104 p.

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2021-03-23
12:42
The Linac4 Source Autopilot / Hrabia, Michal (CERN) ; Noll, Daniel (ESS - European Spallation Source (SE)) ; Peryt, Maciej (CERN) ; Scrivens, Richard (CERN)
The Linac4 Source Autopilot improves the stability, uptime and monitoring of the Linac4 source, by using high level automation to control and monitor the device parameters of the source. [...]
CERN-ACC-NOTE-2021-0011.
- 2021. - 17 p.
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2021-03-09
17:55
Linac4 source extraction re-design for higher current operation / Bellodi, Giulia (CERN) ; De Grandsaignes D'Hauterives, Herve Josselin (Université Paris-Saclay (FR)) ; Noll, Daniel (ESS - European Spallation Source (SE))
At the end of LS2, Linac4 will become the new injector of proton beams to the entire CERN accelerator complex. [...]
CERN-ACC-NOTE-2021-0009.
- 2021. - 11 p.
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2021-03-05
14:18
Development of a beam position monitor for co-propagating electron and proton beams / Senes, Eugenio
Novel acceleration technologies promise a large improvement in particle accelerator performance, but pose a number of technical challenges due to the use of several beams and the beam parameters involved [...]
CERN-THESIS-2020-294 - 140 p.

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2021-02-19
06:13
Identification of impedance sources responsible for longitudinal beam instabilities in the CERN PS / Lasheen, A (CERN) ; Damerau, H (CERN) ; Favia, G (CERN) ; Kozlowski, P (CERN) ; Popovic, B (CERN)
Longitudinal instabilities in the CERN PS are an important limitation to obtain the expected beam intensity and longitudinal emittance at the PS extraction in the framework of the LHC Injector Upgrade (LIU) project. The observed coupled-bunch instabilities lead to dipolar and quadrupolar oscillations, as well as to an uncontrolled longitudinal emittance blow-up for proton beams. [...]
2020 - 7 p. - Published in : 10.23732/CYRCP-2020-009.323 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.323-329 (CERN-2020-009)

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2021-02-17
06:31
Active methods of suppressing longitudinal multi-bunch instabilities / Bertin, F (CERN) ; Damerau, H (CERN) ; Favia, G (CERN) ; Lasheen, A (CERN)
Longitudinal multi-bunch instabilities limit the beam intensity and quality reach of hadron synchrotrons. In case the impedance source driving the instability is well known, for example an RF cavity, active feedback can be set up locally to reduce its effect on the beam. [...]
2020 - 6 p. - Published in : 10.23732/CYRCP-2020-009.197 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.197 (CERN-2020-009)

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2021-02-17
06:31
Low impedance design with example of kickers (including cables) and potential of metamaterials / Zannini, C (CERN) ; Barnes, M.J. (CERN) ; Biancacci, N (CERN) ; Danisi, A (CERN) ; Koukovini-Platia, E (CERN) ; Métral, E (CERN) ; Rumolo, G (CERN) ; Salvant, B (CERN)
Unmatched terminations of single elements were recently identified to be responsible for beam instabilities in the CERN PSB and LEIR machines. Impedance models are needed to estimate the impedance of similar devices and to assess potential intensity limitations. [...]
2020 - 8 p. - Published in : 10.23732/CYRCP-2020-009.167 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.167 (CERN-2020-009)

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2021-02-17
06:31
Source of horizontal instability at the CERN Proton Synchrotron Booster / Koukovini-Platia, E (CERN) ; Barnes, M J (CERN) ; Bartosik, H (CERN) ; Rumolo, G (CERN) ; Sermeus, L (CERN) ; Zannini, C (CERN)
The CERN Proton Synchrotron Booster (PSB) has been known to suffer from horizontal instabilities since its early operation. These instabilities appear at specific beam energies and range of working points. [...]
2020 - 6 p. - Published in : 10.23732/CYRCP-2020-009.148 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.148 (CERN-2020-009)

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2021-02-17
06:31
Diagnostics with quadrupolar pick-ups / Oeftiger, A (Darmstadt, GSI ; CERN)
The spectrum of a quadrupolar pick-up gives access to coherent second-order modes of a beam in a non-invasive way. The signature of bunched beams not only features the first-order and second-order dipolar modes, but also most notably (1.) bands of even envelope modes, (2.) odd (skew) envelope modes and (3.) coherent dispersion modes. [...]
2020 - 7 p. - Published in : 10.23732/CYRCP-2020-009.130 Fulltext: PDF;
In : ICFA mini-Workshop on Mitigation of Coherent Beam Instabilities in Particle Accelerators (MCBI 2019), Zermatt, Switzerland, 23 - 27 Sep 2019, pp.130 (CERN-2020-009)

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2021-02-09
06:14
Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance / Biancacci, N (CERN) ; Métral, E (CERN) ; Migliorati, M (INFN, Rome ; Rome U.)
A destabilizing effect of the detuning impedance has been recently observed in simulations of the CERN Proton Synchrotron (PS) at the injection energy: while without the detuning impedance the instability is faster in the vertical plane as expected (due to the elliptical shape of the vacuum chamber), with detuning impedance the instability appears to be faster in the horizontal plane. In order to understand the detuning impedance destabilizing effect, we study the collective behavior for the simpler case of a coasting beam with PS-like parameters and a simplified impedance model. [...]
2021 - 7 p. - Published in : Phys. Rev. Accel. Beams 23 (2021) 124402 Fulltext from Publisher: PDF;

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