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PACMAN

Title
A Study on Particle Accelerator Components Metrology and Alignment to the Nanometre scale
Funding
EC | FP7 | SP3 | PEOPLE
Call
FP7-PEOPLE-2013-ITN
Contract (GA) number
606839
Start Date
2013/09/01
End Date
2017/08/31
Open Access mandate
no
Special Clause 39
no
Organizations
Conseil Europeen pour la Recherche Nucleaire
More information
Detailed project information (CORDIS)

 

  • Challenges in measuring the longitudinal field Challenges in measuring the longitudinal field

    Arpaia , Pasquale; Caiazza, Domenico; Petone, Carlo; Russenschuck, Stephan (2015)
    Projects: EC | PACMAN (606839)
    A vibrating wire is used to measure the longitudinal profile of the magnetic flux density in the aperture of a non-periodical structure such as a quadrupole accelerator magnet. Limitations in terms of measurement repeatability and uncertainty are observed. The possible causes are investigated by experimental characterization of the measurement system. Uncertainty sources are identified and particular cases are reported in which the mathematical assumptions are no longer valid. The chall...

    CHARACTERISATION AND MEASUREMENT TO THE SUB-MICRON SCALE OF A REFERENCE WIRE POSITION: CARACTERISATION ET MESURE SUB-MICROMETRIQUE DE LA POSITION D’UN FIL DE REFERENCE

    SANZ , Claude; CHERIF , Ahmed; MAINAUD DURAND , Hélène; MORANTZ , Paul; SHORE , Paul (2015)
    Projects: EC | PACMAN (606839)
    L’étude suivante est réalisée dans le cadre du projet PACMAN (a study on Particle Accelerator Components Metrology and Alignment to the Nanometre scale) : une étude sur la métrologie et l’alignement à l’échelle nanométrique des composants d’un accélérateur de particules. C’est un programme Marie Curie supporté par la Commission Européenne et hébergé par le CERN. Le but de ce programme est de faire travailler en équipe de jeunes chercheurs sur le développement d’un banc de pré-alignement pour ...

    Design of the 15 GHz BPM test bench for the CLIC test facility to perform precise stretchedwire RF measurements

    Silvia Zorzetti, Silvia; Fanucci, Luca; Galindo Muño, Natalia; Wendt, Manfred (2015)
    Projects: EC | PACMAN (606839)
    The Compact Linear Collider (CLIC) requires a low emittance beam transport and preservation, thus a precise control of the beam orbit along up to 50 km of the accelerator components in the sub-m regime is required. Within the PACMAN3 (Particle Accelerator Components Metrology and Alignment to the Nanometer Scale) PhD training action a study with the objective of pre-aligning the electrical centre of a 15 GHz cavity beam position monitor (BPM) to the magnetic centre of the main beam quadrupole...

    Rotating-coil calibration in a reference quadrupole, considering roll-angle misalignment and higher-order harmonics

    Arpaia, Pasquale; Buzio, Marco; Köster, Oliver; Russenschuck, Stephan; Severino, Giordana (2016)
    Projects: EC | PACMAN (606839)
    A method is proposed for calibrating the radius of a rotating coil sensor by relaxing the metrological constraints on alignment and field errors of the reference quadrupole. A coil radius calibration considering a roll-angle misalignment of the measurement bench, the magnet, and the motor-drive unit is analyzed. Then, the error arising from higher-order harmonic field imperfections in the reference quadrupole is assessed. The method is validated by numerical field computation for both the hig...

    Calibrating the sensing-coil radius by feed-down from a harmonic reference

    Arpaia, Pasquale; Buzio, Marco; Koster, Oliver; Russenschuck, Stephan; Severino, Giordana (2015)
    Projects: EC | PACMAN (606839)
    A method for calibrating the radius of rotating, harmonic sensing coils is proposed that allows relaxing constraints on alignment and field errors of the reference quadrupole magnet. Radius calibration considering roll angle misalignment between the measurement bench, the magnet, and the motor-drive unit is studied first. We then study the calibration error when a harmonic field error of higher order is present in the calibration magnet. This also yields a calibration whena sextupole magne...

    Status of PACMAN Project at CERN

    Catalan-Lasheras, Nuria; Mainaud-Durand, Hélène; Modena , Michele (2015)
    Projects: EC | PACMAN (606839)
    Though the Large Hadron Collider (LHC) at CERN is just at the start of a program expected to run for 20 additional years, CERN is studying the next generation of colliders, like the Compact Linear Collider (CLIC). This project proposes an electron-positron collider with a length close to 50 km and with a centre of mass energy of 3 TeV at the collision point. One of the main challenges is the sub-micrometric size of the beams, down to a few nanometres at the interaction point. As a consequence...

    PERFORMANCE OF THE STRETCHED- AND VIBRATING-WIRE: PERFORMANCE OF THE STRETCHED- AND VIBRATING-WIRE LOCATING QUADRUPOLE MAGNETIC AXES

    Arpaia, Pasquale; Caiazza, Domenico; Petrone, Carlo; Russenschuck, Stephan (2015)
    Projects: EC | PACMAN (606839)
    A systematic comparison of performance of stretched-wire and vibrating-wire methods for measuring the magnetic axis of a reference quadrupole magnet is presented. The compatibility of the two measurements is demonstrated and the precision of the two methods is compared as a function of the magnet gradient. Furthermore, a correction technique for the influence of non-uniform background fields is proposed for the vibrating-wire method. Experimental results are given for a normal-conducting quad...

    New potential for the Leitz Infinity Coordinate Measuring Machine

    Sanz, Claude; a; Cherif, Ahmed; MAINAUD DURAND , Hélène; Schneider, Jurgen; Steffens, Norbert; Morantz , Paul; Shore , Paul (2015)
    Projects: EC | PACMAN (606839)
    The following study is realised within the frame of the PACMAN project: a study on Particle Accelerator Components Metrology and Alignment to the Nanometre scale, which is a Marie Curie program supported by the European commission and hosted by CERN (European Organisation for Nuclear Research). The aim of this program is to develop and build a pre-alignment bench on which each component is aligned to the required level in one single step using a stretched wire. During the operation, the centr...

    PACMAN study of FSI and micro-triangulation for the pre-alignment of CLIC

    Kamugasa, William Solomon; Vlachakis, Vasileios (2015)
    Projects: EC | PACMAN (606839)
    The alignment precision of linear colliders is extremely demanding owing to the very narrow beam size at the interaction point. Unlike circular colliders, particles in linear colliders have only one chance to collide and are hence tightly focused to maximise the number of interactions per collision. The PACMAN* project is dedicated to study the integration of both fiducialization and alignment of the components on a common support. FSI (Frequency Scanning Interferometry) and Micro-triangulati...
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