Browsing by Author "Morantz, Paul"

Browsing by Author "Morantz, Paul"

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  • Evaluation of the performance variation of porous air pads on discontinuous surfaces 
    Sanz, Claude; Morantz, Paul; Lunt, Alexander J. G.; Shore, Paul; Chérif, Ahmed; Schneider, Jürgen; Mainaud-Durand, Hélène; Steffens, Norbert (Elsevier, 2019-10-31)
    A new high accuracy position measurement system has been developed. It measures the position of a 0.1 mm diameter copper-beryllium wire that informs alignment of energy beams in advanced particle accelerators. This new ...
  • Fast figuring of large optics by reactive atom plasma 
    Castelli, Marco; Jourdain, Renaud; Morantz, Paul; Shore, Paul (2012-09-13)
    The next generation of ground-based astronomical observatories will require fabrication and maintenance of extremely large segmented mirrors tens of meters in diameter. At present, the large production of segments required ...
  • Form measurement of a 0.1 mm diameter wire with a chromatic confocal sensor, with associated uncertainty evaluation 
    Sanz, Claude; Giusca, Claudiu; Morantz, Paul; Marin, Antonio; Chérif, Ahmed; Schneider, Jürgen; Mainaud-Durand, Hélène; Shore, Paul; Steffens, Norbert (IOP Publishing, 2018-06-07)
    The accurate characterisation of a copper–beryllium wire with a diameter of 0.1 mm is one of the steps to increase the precision of future accelerators' pre-alignment. Novelties in measuring the wire properties were found ...
  • Grinding metre scale mirror segments for the E-ELT ground based telescope 
    Comley, Paul; Morantz, Paul; Shore, Paul; Tonnellier, Xavier (Technische Rundschau, Hallwag Publishers; 1999, 2011-04-21)
    The next generation of ground based telescopes require many hundreds of metre scale off-axis mirrors. In this paper the grinding of a 1.45m scale Zerodur® mirror segment for the European Extremely Large Telescope (E-ELT) ...
  • A method for assessing measurement precision and stability of optical probes 
    Norman, James; Tonnellier, Xavier; Morantz, Paul (European Society for Precision Engineering and Nanotechnology, 2016-06-30)
    The current strategy for measuring non-specular metre-scale surfaces – for instance segmented freeform optics post-grinding – in the mid- frequency bandwidths (S-filter), involves the use of contact probe based systems ...
  • Micro-scale finishing of the surface and form of a Ti-6Al-4V lightweight rotor obtained by laser powder bed fusion used for air bearing 
    Sanz, Claude; Gerard, Romain; Morantz, Paul; Chérif, Ahmed; Shore, Paul; Mainaud-Durand, Hélène; Lunt, Alexander J. G. (Elsevier, 2018-07-26)
    The European Organisation for Nuclear Research, CERN, is in the process of designing and testing parts for the next generation of linear accelerators. In order to operate the experiments, the pre-alignment precision of the ...
  • Microwaves enable activated plasma figuring for ultra-precision fabrication of optics 
    Bennett, Adam; Jourdain, Renaud; Kirby, Paul; MacKay, P.; Shore, Paul; Nicholls, John R.; Morantz, Paul (European Society for Precision Engineering and Nanotechnology, 2016-06-30)
    Activated plasma figuring using microwaves aims at providing highly efficient activated energy beams for rapid fabrication of optics. The chemical nature of this type of energy beam leads to targeting silicon-based ...
  • New potential for the Leitz Infinity Coordinate Measuring Machine 
    Sanz, Claude; Cherif, Ahmed; Mainaud-Durand, Hélène; Schneider, Jürgen; Steffens, Norbert; Morantz, Paul; Shore, Paul (Euspen, 2015-06-01)
    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 ...
  • A novel accelerometer based feedback concept for improving machine dynamic performance 
    Abir, Jonathan; Morantz, Paul; Longo, Stefano; Shore, Paul (Elsevier, 2016-11-10)
    Small size ultra-precision Computer Numerical Control (CNC) machines require high dynamic performance. Flexible frame phenomena can limit the machine dynamic performance, particularly in small size machines. A novel ...
  • Numerical and experimental modal analysis applied to an optical test system designed for the form measurements of metre-scale optics 
    Golano, P. G.; Zanotti Fragonara, Luca; Morantz, Paul; Jourdain, Renaud (Hindawi Publishing, 2018-11-04)
    The work focuses on the structural design and performances of a unique optical test system (OTS) used for measuring metre-scale optical surfaces. The investigation was carried out through a modal analysis. Two sets of ...
  • Optimized estimator for real-time dynamic displacement measurement using accelerometers 
    Abir, Jonathan; Longo, Stefano; Morantz, Paul; Shore, Paul (Elsevier, 2016-07-30)
    This paper presents a method for optimizing the performance of a real-time, long term, and accurate accelerometer based displacement measurement technique, with no physical reference point. The technique was applied in a ...
  • Position sensor for active magnetic bearing with commercial linear optical encoders 
    Tantau, Mathias; Morantz, Paul; Shore, Paul (Elsevier, 2021-05-19)
    Active magnetic bearings are used in a number of applications but their disadvantage is the high asynchronous error due to sensor noise amplification. In this paper a new radial position sensor for active magnetic bearings ...
  • Precision grinding for rapid fabrication of segments for extremely large telescopes using the Cranfield BoX 
    Tonnellier, Xavier; Morantz, Paul; Shore, Paul; Comley, Paul (International Society for Optical Engineering; 1999, 2012-07-11)
    An ultra precision large optics grinding machine, BoX®, was developed and produced at Cranfield University. BoX® offers a rapid and economic solution for grinding large off-axis aspherical and free-form optical components. ...
  • Production of electronics and photovoltaics using a reel-to-reel process 
    Graham, A.; Morantz, Paul; Comley, Paul (European Society for Precision Engineering and Nanotechnology, 2016-06-30)
    Reel to reel manufacturing is a mature technology that involves the passing of a flexible substrate or web continuously through one or more processes. The web is typically much longer than it is wide, and the width in turn ...
  • Sub-surface damage issues for effective fabrication of large optics 
    Tonnellier, Xavier; Shore, Paul; Morantz, Paul; Baldwin, A.; Walker, D.; Yu, G.; Evans, R. (2008-07-14)
    A new ultra precision large optics grinding machine, BoX®has been developed at Cranfield University. BoX®islocated at the UK's Ultra Precision Surfaces laboratory at the OpTIC Technium. This machine offers a rapidand ...
  • Subsurface damage in precision ground ULE® and Zerodur® surfaces 
    Tonnellier, Xavier; Morantz, Paul; Shore, Paul; Baldwin, A.; Evans, R.; Walker, D. D. (Optical Society of America (OSA), 2007-09-17)
    The total process cycle time for large ULE®and Zerodur®optics can be improved using a precise and rapid grinding process, with low levels of surface waviness and subsurface damage. In this paper, the amounts of defects ...
  • Surface quality of a 1m Zerodur part using an effective grinding mode 
    Tonnellier, Xavier; Shore, Paul; Morantz, Paul; Orton, D. (2012-07-11)
    A new ultra precision large optics grinding machine, BoX(R), has been developed at Cranfield University. This machine is located at the UK's Ultra Precision Surfaces laboratory at the OpTIC Technium, North Wales. This ...
  • Virtual metrology frame technique for improving dynamic performance of a small size machine tool 
    Abir, Jonathan; Longo, Stefano; Morantz, Paul; Shore, Paul (Elsevier, 2016-11-16)
    This paper presents a novel concept, a virtual metrology frame, for enhancing the dynamic performance of a machine tool with a flexible structural frame. The dynamic properties of a machine are directly affected by the ...