CERN Accelerating science

Internal Note
Report number	CERN-ACC-NOTE-2017-0060
Title	MD 979: Beta-beating measurements on colliding beams
Author(s)	Goncalves Jorge, Patrik ; Barranco Garcia, Javier (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Pieloni, Tatiana (EPFL - Ecole Polytechnique Federale Lausanne (CH)) ; Buffat, Xavier (CERN) ; Carlier, Felix Simon (Technische Universiteit Delft (NL)) ; Coello De Portugal - Martinez Vazquez, Jaime Maria (Universitat Politecnica Catalunya (ES)) ; Fol, Elena (University of Applied Sciences (DE)) ; Langner, Andy Sven (CERN) ; Medina Medrano, Luis Eduardo (Universidad de Guanajuato (MX)) ; Olexa, Jakub (CERN) ; Tomas Garcia, Rogelio (CERN) ; Valuch, Daniel (CERN) ; Wegscheider, Andreas (Hamburg University (DE))
Corporate author(s)	CERN. Geneva. ATS Department
Publication	2017
Imprint	08 Nov 2017
Number of pages	13
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Keywords	HL-LHC ; FCC-hh ; beam-beam ; AC dipole ; ADT ; β-heating
Abstract	The HL-LHC high brightness beams will give a large β-beating due to the head-on and long-range interactions since a beam-beam parameter of 0.01 per Interaction Point (IP) is expected. The β-heating induced by two head-on collision reaches 15%. A third IP, i.e. IP8, could bring the β-heating up to 24%. The aim of the Machine Development (MD) study was to test optics measurements with AC dipole and ADT on colliding beams at injection and to implement a correction of the β-heating due to to head-on collision in the two experiments IP1&5. Int his note, we summarize the first results of this test performed in the LHC.
Submitted by	[email protected]