CERN Accelerating science

All PS Complex

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2021-05-08
18:18
Beam Loss Reduction by Barrier Buckets in the CERN Accelerator Complex / Vadai, Mihaly
For a future intensity increase of the fixed-target beam in the accelerator complex at CERN, new techniques to reduce beam loss are required [...]
CERN-THESIS-2021-043 -

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2021-04-22
12:04
A pulsed high-voltage decelerator system to deliver low-energy antiprotons / Husson, A (IJCLab, Orsay) ; Kim, B H (Seoul Natl. U., Dept. Phys. Astron.) ; Welker, A (CERN) ; Charlton, M (Swansea U.) ; Choi, J J (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M (UNIST, Ulsan) ; Cladé, P (Paris, Lab. Kastler Brossel) ; Comini, P (IRFU, Saclay) ; Crépin, P -P (Paris, Lab. Kastler Brossel) ; Crivelli, P (Zurich, ETH-CSCS/SCSC) et al.
The GBAR (Gravitational Behavior of Antihydrogen at Rest) experiment at CERN requires efficient deceleration of 100 keV antiprotons provided by the new ELENA synchrotron ring to synthesize antihydrogen. This is accomplished using electrostatic deceleration optics and a drift tube that is designed to switch from -99 kV to ground when the antiproton bunch is inside – essentially a charged particle “elevator” – producing a 1 keV pulse. [...]
2021 - 7 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1002 (2021) 165245

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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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