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TY - CONF AU - Salemme, R. AU - Abdolvand, A. AU - Baglin, V. AU - Calatroni, S. AU - Chiggiato, P. AU - Di Girolamo, B. AU - Garcia-Tabares Valdivieso, E. AU - Jenninger, B. AU - Prever-Loiri, L. AU - Sitko, M. AU - Wackerow, S. ED - Koscielniak, Shane ED - Satogata, Todd ED - Schaa, Volker RW ED - Thomson, Jana TI - First Beam Test of Laser Engineered Surface Structures (LESS) at Cryogenic Temperature in CERN SPS Accelerator J2 - Proc. of IPAC2018, Vancouver, BC, Canada, April 29-May 4, 2018 C1 - Vancouver, BC, Canada T2 - International Particle Accelerator Conference T3 - 9 LA - english AB - Electron cloud mitigation is an essential requirement for accelerators of positive particles with high intensity beams to guarantee beam stability and limited heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) are being considered, within the High Luminosity upgrade of the LHC collider at CERN (HL-LHC), as an option to reduce the Secondary Electron Yield (SEY) of the surfaces facing the beam, thus suppressing the elec-tron cloud phenomenon. As part of this study, a 2.2 m long Beam Screen (BS) with LESS has been tested at cryogenic temperature in the COLD bore EXperiment (COLDEX) facility in the SPS accelerator at CERN. In this paper, we describe the manufacturing procedure of the beam screen, the employed laser treatment technique and discuss our first observations in COLDEX confirming electron cloud suppression. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2616 EP - 2619 KW - electron KW - laser KW - vacuum KW - cryogenics KW - multipactoring DA - 2018/06 PY - 2018 SN - 978-3-95450-184-7 DO - 10.18429/JACoW-IPAC2018-WEPMG005 UR - http://jacow.org/ipac2018/papers/wepmg005.pdf ER -