The recombination chamber in Large Hadron Collider allows the separated proton beams to merge into a common vacuum chamber surrounding the interaction points. It has been subject of thorough studies concerning its interaction with the circulating beam. In this paper, we present the numerical and experimental results of our investigation on an approximated geometry. We show that in the smooth transitions between pipes of different diameters a trapped mode may exist, both in the real and in the approximated geometry. In the real structure, the mode is weak and not harmful both for the beam stability and power loss. © 2003 Elsevier B.V. All rights reserved.
On trapped modes in the LHC recombination chambers: Numerical and experimental results / D., Brandt; F., Caspers; D., Li; Migliorati, Mauro; Mostacci, Andrea; Palumbo, Luigi; F., Ruggiero; B., Spataro; L., Vos. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 517:1-3(2004), pp. 19-27. [10.1016/j.nima.2003.09.046]
On trapped modes in the LHC recombination chambers: Numerical and experimental results
MIGLIORATI, Mauro;MOSTACCI, Andrea;PALUMBO, Luigi;
2004
Abstract
The recombination chamber in Large Hadron Collider allows the separated proton beams to merge into a common vacuum chamber surrounding the interaction points. It has been subject of thorough studies concerning its interaction with the circulating beam. In this paper, we present the numerical and experimental results of our investigation on an approximated geometry. We show that in the smooth transitions between pipes of different diameters a trapped mode may exist, both in the real and in the approximated geometry. In the real structure, the mode is weak and not harmful both for the beam stability and power loss. © 2003 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
