SPS Slow Extracted Spill Quality During the 2016 Run

Kain, Verena; Bauche, Jeremie; Catherine, Pascal; Cornelis, Karel; Fraser, Matthew; Gatignon, Laurent; Genton, Charles-Mathieu; Goddard, Brennan; Kahle, Karsten; Magrans de Abril, Marc; Michels, Olivier; Stoel, Linda; Velotti, Francesco

doi:10.18429/JACoW-IPAC2017-MOPIK049

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RIS citation export for MOPIK049: SPS Slow Extracted Spill Quality During the 2016 Run

TY - CONF
AU - Kain, V.
AU - Bauche, J.
AU - Catherine, P.
AU - Cornelis, K.
AU - Fraser, M.A.
AU - Gatignon, L.
AU - Genton, C.M.
AU - Goddard, B.
AU - Kahle, K.
AU - Magrans de Abril, M.
AU - Michels, O.
AU - Stoel, L.S.
AU - Velotti, F.M.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - SPS Slow Extracted Spill Quality During the 2016 Run
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - 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. The Mains power supply noise at 50 Hz and harmonics is also corrected in feed-forward by small amplitude tune modulation at the respective frequencies with a dedicated additional quadrupole circuit. In 2016 the spill quality could be much improved with respect to the situation of the previous year with more performant algorithms. In this paper the improved tools are described and the characteristics of the SPS slow extracted spill in terms of macro structure and typical frequency content are shown. Other sources of perturbation were, however, also present in 2016 which frequently caused the spill quality to be much reduced. The different effects are discussed and possible or actual solutions detailed. Finally, the evolution of the spill quality during characteristic periods in the 2016 run is presented.
PB - JACoW
CP - Geneva, Switzerland
SP - 627
EP - 630
KW - target
KW - extraction
KW - quadrupole
KW - power-supply
KW - experiment
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-MOPIK049
UR - http://jacow.org/ipac2017/papers/mopik049.pdf
ER -