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Characterisation of SPS slow extraction spill quality degradation
/ Velotti, Francesco (CERN) ; Bartosik, Hannes (CERN) ; Buzio, Marco (CERN) ; Cornelis, Karel (CERN) ; Di Capua, Vincenzo (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN)
The main physics users of the Super Proton Synchrotron (SPS) are the experiments installed in the North Area (NA). They are supplied with slowly extracted protons or heavy ions, exploiting a third integer slow extraction to provide a 4.8 s spill. [...]
CERN-ACC-2019-196.-
2019 - 3 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP034
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP034
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SPS slow extraction losses and activation: update on recent improvements
/ Fraser, Matthew (CERN) ; Balhan, Bruno (CERN) ; Barna, Daniel (Wigner RCP, Budapest) ; Bartosik, Hannes (CERN) ; Bernhard, Johannes (CERN) ; Bertone, Caterina (CERN) ; Björkman, Daniel (CERN) ; Borburgh, Jan (CERN) ; Brugger, Markus (CERN) ; Brunner, Kristóf (Wigner RCP, Budapest) et al.
Annual high intensity requests of over $1 \times 10^{19}$ protons on target (POT) from the CERN Super Proton Synchrotron (SPS) Fixed Target (FT) physics program continue, with the prospect of requests for even higher, unprecedented levels in the coming decade. A concerted and multifaceted R&D; effort has been launched to understand and reduce the slow extraction induced radioactivation of the SPS and to anticipate future experimental proposals, such as SHiP [1] at the SPS Beam Dump Facility (BDF) [2], which will request an additional $4 \times 10^{19}$ POT per year. [...]
CERN-PBC-CONF-2021-002; CERN-ACC-2019-199.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP031
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP031
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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.
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2019. - 10 p.
Full text
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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 ; CERN-PBC-Notes-2021-019.
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2019.
Full text
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Slow Extraction Efficiency Measurements at CERN SPS
/ Fraser, Matthew (CERN) ; Cornelis, Karel (CERN) ; Esposito, Luigi Salvatore (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Roncarolo, Federico (CERN) ; Stoel, Linda (CERN) ; Velotti, Francesco (CERN)
The high efficiency of most slow extraction systems makes quantifying the exact amount of beam lost in the process extremely challenging. This is compounded by the lack of time structure in the extracted beam, as is typically required by the high-energy physics experiments, and the difficulty in accurately calibrating D.C. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF054
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF054
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Observations of SPS Slow-Extracted Spill Quality Degradation and Possible Improvements
/ Velotti, Francesco (CERN) ; Bartosik, Hannes (CERN) ; Cornelis, Karel (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Hirlaender, Simon (CERN) ; Kain, Verena (CERN) ; Michels, Olivier (CERN) ; Pari, Michelangelo (CERN)
The SPS delivers slow extracted proton and heavy ion spills of several seconds to the North Area fixed target experiments with a very high duty factor. Reduced machine reproducibility due to magnetic history and power supply ripples on the main circuits lead however to frequent degradation of the spill duty factor. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF035
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF035
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Identification and Removal of SPS Aperture Limitations
/ Kain, Verena (CERN) ; Alemany-Fernández, Reyes (CERN) ; Bartosik, Hannes (CERN) ; Cettour Cave, Stephane (CERN) ; Cornelis, Karel (CERN) ; Cruikshank, Paul (CERN) ; Ferreira Somoza, Jose (CERN) ; Goddard, Brennan (CERN) ; Pasquino, Chiara (CERN)
The CERN SPS (Super Proton Synchrotron) serves as LHC injector and provides beam for the North Area fixed target experiments. Since the 2016 run automated local aperture scans have been performed with the main focus on the vertical plane where limitations typically arise due to the flat vacuum chambers in most SPS elements. [...]
CERN-ACC-2018-102.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF021
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF021
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Performance of the CERN Low Energy Ion Ring (LEIR) with Xenon beams
/ Alemany-Fernández, Reyes (CERN) ; Albright, Simon (CERN) ; Andujar, Oscar (CERN) ; Angoletta, Maria Elena (CERN) ; Axensalva, Jerome (CERN) ; Bartosik, Hannes (CERN) ; Baud, Guillaume (CERN) ; Biancacci, Nicolo (CERN) ; Bozzolan, Michele (CERN) ; Cettour Cave, Stephane (CERN) et al.
In 2017 the CERN Low Energy Ion Ring demonstrated once more the feasibility of injecting, accumulating, cooling and accelerating a new nuclei, $^{129}$Xe${39+}$. The operation of this new ion species started at the beginning of March with the start up of the xenon ion source and the Linac3. [...]
CERN-ACC-2018-144.-
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF020
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF020
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