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Title: Experimental verification for a collimator with in-jaw beam position monitors
Authors: Wollmann, Daniel
Aberle, Oliver
Assmann, Ralph W.
Bertarelli, Alessandro
Boccard, Christian
Bruce, Roderik
Burkart, Florian
Cauchi, Marija
Dallocchio, Alessandro
Deboy, Daniel
Gasior, Marek
Jones, Rhodri
Kain, Verena
Lari, Luisella
Nosych, Andriy A.
Redaelli, Stefano
Rossi, Adriana
Valentino, Gianluca
Keywords: Colliders (Nuclear physics)
Nuclear physics
Large Hadron Collider (France and Switzerland)
Issue Date: 2012
Publisher: JACoW
Citation: Wollmann, D., Aberle, O., Assmann, R. W., Bertarelli, A., Boccard, C., Bruce, R., ... & Gasior, M. (2012). Experimental verification for a collimator with in-jaw beam position monitors. 52nd ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Beijing. 146-150.
Abstract: At present the beam based alignment of the LHC collimators is performed by touching the beam halo with the two jaws of each device. This method requires dedicated fills at low intensities that are done infrequently because the procedure is time consuming. This limits the operational flexibility in particular in the case of changes of optics and orbit configuration in the experimental regions. The system performance relies on the machine reproducibility and regular loss maps to validate the settings. To overcome these limitations and to allow a continuous monitoring of the beam position at the collimators, a design with in-jaw beam position monitors was proposed and successfully tested with a mock-up collimator in the CERN-SPS. Extensive beam experiments allowed to determine the achievable accuracy of the jaw alignment for single and multi-turn operation. In this paper the results of these experiments are discussed. The measured alignment accuracy is compared to the accuracies achieved with the present collimators in the LHC.
ISBN: 9783954501182
Appears in Collections:Scholarly Works - FacICTCCE

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