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ATS Notes

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2019-05-17
16:29
Magnetic Waveform Measurements of the PSB Extraction Kicker KFA14L1 and Future LIU Emittance Growth Estimates / Fraser, Matthew Alexander (CERN) ; Albright, Simon (CERN) ; Antoniou, Fanouria (CERN) ; Di Giovanni, Gian Piero (CERN) ; Dutheil, Yann (CERN) ; Forte, Vincenzo ; Huschauer, Alexander (CERN) ; Roncarolo, Federico (CERN)
Understanding the different sources of emittance dilution along the LHC injector chain is an import-ant part of providing the high brightness proton beams demanded by the LHC Injectors Upgrade (LIU) project. [...]
CERN-ACC-NOTE-2019-0019. - 2019.
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2019-05-16
15:36
Landau Damping for TMCI: with vs. without Transverse Damper / Metral, Elias (CERN)
The Landau damping of the Transverse Mode-Coupling Instability (TMCI) is discussed both without and with a resistive transverse damper. [...]
CERN-ACC-NOTE-2019-0018. - 2019. - 21 p.
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2019-05-16
12:10
Properties of the electromagnetic fields generated by a circular-symmetric e-cloud pinch in the ultra-relativistic limit / Iadarola, Giovanni (CERN)
The electromagnetic fields generated by an electron cloud in the beam pipe of a particle accelerator introduce additional forces in the dynamics of the particle beams, which can be responsible of beam instabilities, beam losses and transverse emittance blow-up [...]
CERN-ACC-NOTE-2019-0017. - 2019. - 10 p.
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2019-05-03
14:42
SPS quadrupole dog-leg and alignment post LS2 / Velotti, Francesco Maria (CERN) ; Bartosik, Hannes (CERN) ; Bestmann, Patrick (CERN) ; Carlier, Etienne (CERN) ; Cornelis, Karel (CERN) ; Galleazzi, Frederic (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Pasquino, Chiara (CERN)
This document describes the functions of the horizontal and vertical dog-legs in the SPS and the effect of their removal for the injection and dump systems, following the LIU-SPS beam dump upgrade
CERN-ACC-NOTE-2019-0015. - 2019. - 10 p.
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2019-04-24
09:32
Beam Characterization of Linac 4's ISO3 / Noll, Daniel (CERN) ; Lallement, Jean-Baptiste (CERN) ; Lombardi, Alessandra (CERN)
After the second LHC long shutdown, Linac4 will become the new injector for proton beams to CERN's chain of accelerators [...]
CERN-ACC-NOTE-2019-0014. - 2019.

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2019-04-23
14:00
An Overview of PyHEADTAIL / Oeftiger, Adrian (CERN)
The macro-particle tracking code PyHEADTAIL simulates collective beam dynamics [...]
CERN-ACC-NOTE-2019-0013. - 2019. - 12 p.
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2019-04-08
17:53
MD3284: Partially Stripped Ions in the LHC / Schaumann, Michaela (CERN) ; Abramov, Andrey (University of London (GB)) ; Alemany Fernandez, Reyes (CERN) ; Argyropoulos, Theodoros (CERN) ; Bartosik, Hannes (CERN) ; Biancacci, Nicolo (CERN) ; Bohl, Thomas (CERN) ; Bracco, Chiara (CERN) ; Bruce, Roderik (CERN) ; Burger, Stephane (CERN) et al.
On 25 July 2018 partially stripped lead ions with one remaining electron (208Pb81+) were injected, accelerated and stored in the LHC for the first time in the scope of MD3284. [...]
CERN-ACC-NOTE-2019-0012. - 2019.

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2019-04-04
11:29
MD3288: Instability latency with controlled noise / Furuseth, Sondre (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Metral, Elias (CERN) ; Valuch, Daniel (CERN) ; Salvant, Benoit (CERN) ; Amorim, David (Universite Grenoble-Alpes (FR)) ; Mounet, Nicolas (CERN) ; Soderen, Martin (CERN) ; Antipov, Sergey (CERN) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) et al.
During this MD, performed on June 14th and July 26th, 2018, the latency of single bunch instabilities was tested with an external controllable noise produced by the ADT kicker. [...]
CERN-ACC-NOTE-2019-0011. - 2019. - 29 p.
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2019-03-26
15:47
Improvements to the SPS Slow Extraction for High Intensity Operation / Balhan, Bruno (CERN) ; Bestmann, Patrick (CERN) ; Bjorkman, Daniel (CERN) ; Borburgh, Jan (CERN) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Di Castro, Mario (CERN) ; Donze, Mathieu (CERN) ; Esposito, Luigi Salvatore (CERN) ; Fraser, Matthew Alexander (CERN) et al.
Slow extraction using the third-integer resonance and thin electrostatic septa as used in the SPS to serve the North Area is a process with inherent beam loss. [...]
CERN-ACC-NOTE-2019-0010. - 2019. - 87 p.
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2019-03-26
09:47
Effect of Crab cavity HOMs on the coupled-bunch stability of HL-LHC / Antipov, Sergey (CERN) ; Biancacci, Nicolo (CERN) ; Komppula, Jani Paavo Olavi ; Metral, Elias (CERN) ; Salvant, Benoit (CERN) ; Burov, Alexey (Fermi National Accelerator Lab. (US))
High frequency High Order Modes can significantly affect the coupled-bunch stability in a circular accelerator. [...]
CERN-ACC-NOTE-2019-0009. - 2019.

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Fokus na:
LHC MD Notes (122)