1.
|
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
|
|
2.
|
SPS Slow Extracted Spill Quality During the 2016 Run
/ Kain, Verena (CERN) ; Bauche, Jeremie (CERN) ; Catherine, Pascal (CERN) ; Cornelis, Karel (CERN) ; Fraser, Matthew (CERN) ; Gatignon, Laurent (CERN) ; Genton, Charles-Mathieu (CERN) ; Goddard, Brennan (CERN) ; Kahle, Karsten (CERN) ; Magrans de Abril, Marc (CERN) et al.
The flux of particles slow extracted with the 1/3 integer resonance from the Super Proton Synchrotron at CERN should ideally be constant over the length of the extraction plateau, for optimum use of the beam by the fixed target experiments. The extracted intensity is controlled in feed-forward correction of the horizontal tune via the main SPS quadrupoles. [...]
CERN-ACC-2017-121.-
2017 - 4 p.
- Published in : 10.18429/JACoW-IPAC2017-MOPIK049
Fulltext: PDF;
In : 8th International Particle Accelerator Conference, Copenhagen, Denmark, 14 - 19 May 2017, pp.MOPIK049
|
|
3.
|
Model and measurements of CERN-SPS slow extraction spill re-shaping - the burst mode slow extraction
/ Pari, Michelangelo (Padua U. ; INFN, Padua ; CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Stoel, Linda (CERN) ; Velotti, Francesco (CERN)
The ENUBET (Enhanced NeUtrino BEams from kaon Tagging) Project aims at reaching a new level of precision of the short-baseline neutrino cross section measurement by using an instrumented decay tunnel. The North Area (NA) experimental facility of the CERN Super Proton Synchrotron (SPS) offers the required infrastructure for the experiment. [...]
CERN-ACC-2019-101.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP035
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP035
|
|
4.
|
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
|
|
5.
|
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
|
|
6.
|
Performance of Transverse Beam Splitting and Extraction at the CERN Proton Synchrotron in the Framework of Multi-turn Extraction
/ Sterbini, Guido (CERN) ; Borburgh, Jan (CERN) ; Damjanovic, Sanja (CERN) ; Gilardoni, Simone (CERN) ; Giovannozzi, Massimo (CERN) ; Hernalsteens, Cédric (CERN ; Ecole Polytechnique, Lausanne) ; Hourican, Michael (CERN) ; Huschauer, Alexander (CERN ; TU Vienna) ; Kahle, Karsten (CERN) ; Le Godec, Gilles (CERN) et al.
Considerable progress has been made in 2015 in the setting up of the multi-turn extraction (MTE) in the CERN Proton Synchrotron (PS). A key ingredient in this novel extraction technique is the beam splitting in transverse phase space. [...]
CERN-ACC-2016-174.-
2016 - 4 p.
- Published in : 10.18429/JACoW-IPAC2016-THPMR043
Published version from JACoW: PDF;
In : 7th International Particle Accelerator Conference, Busan, Korea, 8 - 13 May 2016, pp.THPMR043
|
|
7.
|
Beam Dynamics Simulations of the Effect of Power Converter Ripple on Slow Extraction at the CERN SPS
/ Prieto, Javier (CERN) ; Fraser, Matthew (CERN) ; Goddard, Brennan (CERN) ; Kain, Verena (CERN) ; Stoel, Linda (CERN) ; Velotti, Francesco (CERN)
The SPS provides slowly extracted protons at 400 GeV/c to CERN's North Area Fixed Target experiments over spills of duration from 1-10 seconds. Low frequency ripple on the current in the main magnets originating from their power converters is a common issue that degrades the slow-extracted spill quality. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-TUPAF050
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.TUPAF050
|
|
8.
|
The New 20 kA 80 V Power Supply for the 520 MeV H$^-$ Cyclotron at TRIUMF
/ Carrozza, Saverino (OCEM, Bologna) ; Bastos, Miguel (CERN) ; Bondesan, Luca (OCEM, Bologna) ; Burnet, Jean-Paul (CERN) ; Bylinski, Yu (TRIUMF) ; Hudson, Gregory (CERN) ; King, Quentin (CERN) ; Le Godec, Gilles (CERN) ; Leung, Arthur (TRIUMF) ; Louie, Dan (TRIUMF) et al.
The new 20 kA, 80 V power supply for the main magnet of the 520 MeV H⁻ Cyclotron at TRIUMF was awarded to OCEM. It has replaced the original system (commissioned in 1976) based on a series pass regulator. [...]
2018 - 4 p.
- Published in : 10.18429/JACoW-IPAC2018-THPAL062
Fulltext: PDF;
In : 9th International Particle Accelerator Conference, Vancouver, Canada, 29 Apr - 4 May 2018, pp.THPAL062
|
|
9.
|
Crystal for slow extraction loss-reduction of the SPS electrostatic septum
/ Esposito, Luigi Salvatore (CERN) ; Addesa, Francesca (INFN, Rome) ; Afonin, Alexander (Serpukhov, IHEP) ; Bestman, Patrick (CERN) ; Borg, Johan (Imperial Coll., London) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Chesnokov, Yuri (Serpukhov, IHEP) ; Denisov, Alexander (St. Petersburg, INP) ; Di Castro, Mario (CERN) et al.
The use of a bent crystal was investigated in order to reduce the losses at the CERN Super Proton Synchrotron (SPS) electrostatic septum (ZS) during the slow extraction of 400 GeV/c protons toward the North Area. The crystal, installed a few meters upstream of the ZS, bends protons that would otherwise impinge on the ZS wires. [...]
CERN-ACC-2019-179.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-WEPMP028
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.WEPMP028
|
|
10.
|
Demonstration of loss reduction using a thin bent crystal to shadow an electrostatic septum during resonant slow extraction
/ Velotti, Francesco (CERN) ; Addesa, Francesca (INFN, Rome) ; Afonin, Alexander (Serpukhov, IHEP) ; Bestmann, Patrick (CERN) ; Borg, Johan (Imperial Coll., London) ; Butcher, Mark (CERN) ; Calviani, Marco (CERN) ; Chesnokov, Yuri (Serpukhov, IHEP) ; Denisov, Alexander (St. Petersburg, INP) ; Di Castro, Mario (CERN) et al.
A proof-of-principle experiment demonstrating the feasibility of using a thin, bent crystal aligned upstream of an extraction septum (ES) to increase the efficiency of the third-integer resonant slow extraction process has been carried out at the CERN Super Proton Synchrotron (SPS). With the primary aim of reducing the beam loss and induced radio-activation of the SPS, the crystal was aligned to both the beam and the septum to reduce by up to 40% the beam intensity impinging the ES and increase the intensity entering the external transfer line. [...]
CERN-ACC-2019-218.-
2019 - 5 p.
- Published in : 10.18429/JACoW-IPAC2019-THXXPLM2
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THXXPLM2
|
|