Reduction of Resonant Slow Extraction Losses with Shadowing of Septum Wires by a Bent Crystal

Velotti, Francesco; Fraser, Matthew; Goddard, Brennan; Kain, Verena; Scandale, Walter; Stoel, Linda

doi:10.18429/JACoW-IPAC2017-MOPIK050

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RIS citation export for MOPIK050: Reduction of Resonant Slow Extraction Losses with Shadowing of Septum Wires by a Bent Crystal

TY - CONF
AU - Velotti, F.M.
AU - Fraser, M.A.
AU - Goddard, B.
AU - Kain, V.
AU - Scandale, W.
AU - Stoel, L.S.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Reduction of Resonant Slow Extraction Losses with Shadowing of Septum Wires by a Bent Crystal
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - A new experiment, SHiP, is being studied at CERN to investigate the existence of three Heavy Neutral Leptons in order to give experimental proof to the proposed neutrino minimal Standard Model. High-intensity slow-extraction of protons from the SPS is a pre-requisite for SHiP. The experiment requires a resonant extraction with in a 7.2 s cycle, and about 4·10¹³ protons extracted at 400 GeV in a 1 s flat-top, to achieve the needed 2·10²⁰ protons on target in five years. Although the SPS has delivered this in the past to the CNGS experiment with fast extraction, for SHiP beam losses and activation of the SPS electrostatic extraction septum (ZS) could be a serious performance limitation, since the target number of protons to resonantly extract per year is a factor of two higher than ever achieved before and a factor of four than ever reached with the third-integer slow extraction. In this paper, a novel extraction technique to significantly reduce the losses at the ZS is proposed, based on the use of a bent crystal to shadow the septum wires. Theoretical concepts are developed, the performance gain quantified and a possible layout proposed.
PB - JACoW
CP - Geneva, Switzerland
SP - 631
EP - 634
KW - extraction
KW - proton
KW - simulation
KW - collimation
KW - septum
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-MOPIK050
UR - http://jacow.org/ipac2017/papers/mopik050.pdf
ER -