CERN Accelerating science

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Internal Note
Report number CERN-ACC-NOTE-2019-0049
Title LHeC optics with β∗ = 10 cm and L∗ = 15 m
Author(s) Cruz Alaniz, Emilia (University of Liverpool (GB)) ; Martin, Roman ; Tomas Garcia, Rogelio (CERN)
Corporate author(s) CERN. Geneva. ATS Department
Imprint 13 Nov 2019. - 17 p.
Subject category Accelerators and Storage Rings
Keywords LHeC ; interaction region design ; dynamic aperture
Abstract New proton optics have been designed for LHeC taking into account new final focus magnet designs and ensuring a full compatibility with HL-LHC version 1.3. The distance between the interaction point (IP) and the first quadrupole has been increased to 15 m to alleviate synchrotron radiation. The smallest β∗ found compatible with magnet aperture is β∗ = 10 cm. Chromaticity correction is demonstrated down to β∗ = 7 cm with acceptable Dynamic Aperture (DA). Ideas and challenges are discussed for β∗ = 5 cm and a new possible final focus based on quadrupole doublets.
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 Δημιουργία εγγραφής 2019-11-13, τελευταία τροποποίηση 2019-11-14

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