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 : CERN Yellow Rep. Conf. Proc. 9 (2020) 323-329
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 : CERN Yellow Rep. Conf. Proc. 9 (2020) 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 : CERN Yellow Rep. Conf. Proc. 9 (2020) 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 : CERN Yellow Rep. Conf. Proc. 9 (2020) 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 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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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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2021-01-25 08:28 |
Αναλυτική εγγραφή - Παρόμοιες εγγραφές
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2021-01-15 11:59 |
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2021-01-13 13:50 |
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2020-12-16 17:05 |
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