May 7 – 12, 2023
Venice, Italy
Europe/Zurich timezone

Demonstration of non-local crystal shadowing at the CERN SPS

MOPA098
May 8, 2023, 4:30 PM
2h
Salone Adriatico

Salone Adriatico

Poster Presentation MC2.T12: Beam Injection/Extraction and Transport Monday Poster Session

Speaker

Pablo Andreas Arrutia Sota (Oxford University)

Description

The main SPS users are the experiments installed in North
experimental Area (NA) which are served with a continuous 4.8 s long
spill of protons and heavy ions. A third-integer resonant slow extraction is used to provide a uniform, long spill. Such a technique
comes at the cost of particles directly hitting the electrostatic septum
wires and activating the surrounding of the extraction
channel. In recent years, silicon bent crystals have been exploited to shadow
the wires of the septum blade and reduce the beam induced activation.
It was then demonstrated the experimental success of local shadowing in
the SPS and a way to further reduce losses with a non-local
installation of the crystal. After the last yearly stop, a new Si bent
crystal was installed in LSS4 of the SPS. In this paper, the first
results from measurements with beam are reported together with
limitations and possible upgrades of the present installation.

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Primary author

Francesco Velotti (European Organization for Nuclear Research)

Co-authors

Brennan Goddard (European Organization for Nuclear Research) Eloise Matheson (European Organization for Nuclear Research) Luigi Salvatore Esposito (European Organization for Nuclear Research) Marco Calviani (European Organization for Nuclear Research) Mario Di Castro (European Organization for Nuclear Research) Mathieu Donze (European Organization for Nuclear Research) Matthew Fraser (European Organization for Nuclear Research) Pablo Andreas Arrutia Sota (Oxford University) Regis Seidenbinder (European Organization for Nuclear Research) Santiago Solis Paiva (European Organization for Nuclear Research) Verena Kain (European Organization for Nuclear Research)

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