IPAC2013 - List of Authors (Gasior, M.)

Paper	Title	Page
THPFI063	Development and Beam Tests of an Automatic Algorithm for Alignment of LHC Collimators with Embedded BPMs	3439
	G. Valentino University of Malta, Information and Communication Technology, Msida, Malta R.W. Aßmann DESY, Hamburg, Germany R. Bruce, M. Gasior, D. Mirarchi, A.A. Nosych, S. Redaelli, B. Salvachua, N.J. Sammut CERN, Geneva, Switzerland
	Collimators with embedded Beam Position Monitor (BPM) buttons will be installed in the LHC during the upcoming long shutdown period. During the subsequent operation, the BPMs will allow the collimator jaws to be kept centered around the beam trajectory. In this manner, the best possible beam cleaning efficiency and machine protection can be provided at unprecedented higher beam energies and intensities. A collimator alignment algorithm is proposed to center the jaws automatically around the beam. The algorithm is based on successive approximation, as the BPM measurements are affected by non-linearities, which vary with the distance between opposite buttons, as well as the difference between the beam and the jaw centers. The successful test results, as well as some considerations for eventual operation in the LHC are also presented.

Paper

Title

Page

Development and Beam Tests of an Automatic Algorithm for Alignment of LHC Collimators with Embedded BPMs

3439

G. Valentino
University of Malta, Information and Communication Technology, Msida, Malta
R.W. Aßmann
DESY, Hamburg, Germany
R. Bruce, M. Gasior, D. Mirarchi, A.A. Nosych, S. Redaelli, B. Salvachua, N.J. Sammut
CERN, Geneva, Switzerland

Collimators with embedded Beam Position Monitor (BPM) buttons will be installed in the LHC during the upcoming long shutdown period. During the subsequent operation, the BPMs will allow the collimator jaws to be kept centered around the beam trajectory. In this manner, the best possible beam cleaning efficiency and machine protection can be provided at unprecedented higher beam energies and intensities. A collimator alignment algorithm is proposed to center the jaws automatically around the beam. The algorithm is based on successive approximation, as the BPM measurements are affected by non-linearities, which vary with the distance between opposite buttons, as well as the difference between the beam and the jaw centers. The successful test results, as well as some considerations for eventual operation in the LHC are also presented.