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12/06/2016, 19:00
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Mr Joe Woodford (National Instruments)13/06/2016, 09:00
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Dr Hermann Schmickler (CERN)13/06/2016, 09:10
As introductory talk to the workshop the whole logical chain from the required luminosity performance of CLIC over optimization of the total power consumption down to smallest possible beam emittances and their preservation in the main linac will be explained on a basic level.
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The importance of alignment for emittance preservation will be high-lighted. -
Andrea Latina (CERN)13/06/2016, 09:35
Misalignments of accelerator components can affect the beam transport through several processes, and lead to emittance growth, beam losses, and beam break-up. In future particle accelerators like CLIC, where the beam size is of a nanometer scale, the effect of the smallest imperfection can be the most dangerous and harm the machine operability. In this talk the main mechanisms for emittance...
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Dr Helene Mainaud Durand (CERN)13/06/2016, 10:00
The PACMAN project is a study on Particle Components' Metrology and Alignment to the Nanometer scale. It is an Innovative Doctoral Program, funded by the EC and CERN where 10 students work towards a PhD thesis. It is a muti-disciplinary project with 16 industrial and academic partners.
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The talk will introduce the technical objectives of the project as well as the first results obtained. -
Bertrand Koehler (ESO)13/06/2016, 11:00Paper and Poster
The European Extremely Large Telescope (E-ELT) is a 39m diameter optical/infrared telescope to be located on Cerro Armazones about 25 km away from the current ESO VLT Observatory at Cerro Paranal, Chile. After initial conceptual studies and a formal approval of the Programme by ESO Council back in 2012, the actual start of construction was actually authorised in 2014 when the required funding...
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Dr Andrew Lewis (National Physical Laboratory)13/06/2016, 11:30
In 2012 a consortium of parties interested in Large Volume Metrology was formed to submit a Potential Research Topic into the European Metrology Research Programme. The topic was subsequently selected for the second stage of the call process and a project consortium consisting of 5 National Metrology Institutes, 3 Universities and 3 unfunded industrial partners was formed to bid into the call....
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Dr Wim Symens (ASML)13/06/2016, 12:00
Lithographic steppers and scanners are highly complex machines used to manufacture integrated circuits (ICs). These devices use an optical system to form an image of a pattern on a quartz plate, called the reticle, onto a photosensitive layer on a substrate, called the wafer. The circular wafer can contain many ICs, typically 100 or more, and needs to be repositioned from exposure to exposure....
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Micha Dehler (PSI)13/06/2016, 14:00
State of the art free electron laser and linear collider
projects require a tight control of emittance dilution
caused by transverse wake field of misaligned components. An attractive option in RF structures are wake field
monitors (WFMs), measuring directly internal transverse
higher order modes.In collaboration between CERN, PSI and
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Sincrotrone Trieste, X band structures with... -
Natalia Galindo Munoz (CERN)13/06/2016, 14:20
To reach a high accelerating gradient of 100 MV/m, the CLIC project under study at CERN uses a 23 cm long tapered normal-conducting travelling wave Accelerating Structure (AS) operating at 12 GHz. To preserve beam emittance at the 1 nm vertical-size collision point, 7 μm accuracy is required in the pre-alignment of the AS wrt the supporting girder. We have developed a dedicated test bench...
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Mr Adam Cseh (National Instruments)13/06/2016, 14:40
In the Advanced RF application on the NI platform presentation the following topics are covered:
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• NI’s RF offering: overview of NI’s RF instruments, platforms and software tools
• PXIe-5668R: the widest band Vector Signal Analyser with Real-Time Spectrum Analysis capability. Supporting phase coherent applications and full bandwidth streaming.
• PXIe-5646R: The Vector Signal Transceiver... -
Ms Silvia Zorzetti (CERN)13/06/2016, 15:00
The Beam Position Monitor (BPM) studied in the frame of the PACMAN project and used for CLIC is a passive resonant cavity operating at about 15GHz, optimized for holding both good spatial (<50nm) and temporal resolutions (<50ns). This BPM has been fully characterized with stretched-wire techniques on a standalone test bench. The nanometric spatial resolution has also been observed through an...
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Prof. Stewart Takashi Boogert (Royal Holloway, University of London)13/06/2016, 15:20
Radio frequency resonant cavity beam position monitors (CBPMs) offer stable nano-meter scale (10s to 100s nm) resolution measurement of transverse beam positions in particle accelerators. The performance of these devices depends critically on system considerations, such as calibration and operation. This talk outlines the main issues with stably operating CBPMS, RF processing, calibration and...
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Ms Giordana Severino (CERN)13/06/2016, 16:10
The rotating coil is one of the preeminent methods used to characterize the magnets’ harmonics content and magnetic center. The rotating coil technique for magnetic measurements of accelerator magnets uses complex patterns of passive coil transducers with the aim to reach the most accurate and precise measurements.
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Nowadays, the printed circuit boards (PCB) technology is the predominant... -
Mr Domenico Caiazza (CERN)13/06/2016, 16:30
To achieve the tight alignment requirements demanded for CLIC, its components need to be pre-aligned on a common support within the micrometer range. Among these components, the main beam quadrupoles will be pre-aligned with respect to their magnetic axis by using the vibrating-wire technique. The measurement method and the characteristics of the PACMAN stretched-wire system will be...
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Dr Gael Le Bec (ESRF)13/06/2016, 16:50
The European Synchrotron Radiation Facility (ESRF) has started a major upgrade: the present storage ring will be dismantled in 2019 and will be replaced by a new one. More than 1000 magnets, with apertures ranging from 25 mm up to 37 mm, will be installed. Most of these magnets will be measured with Single Stretched Wire (SSW) benches developed in house.
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The basis of SSW alignment and some... -
Dr Stephane Sanfilippo (Paul Scherrer Institut)13/06/2016, 17:10
The talk will be mainly focused on the magnetic measurement techniques and systems used at the Paul Scherrer Institut (PSI) to characterize the field quality and qualify the magnetic elements (magnets and undulators) needed in the large scale facilities. In the frame work of the Swiss Free Electron laser (SwissFEL), the next facility in construction at PSI, the techniques for magnetic...
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Dr Heinrich Schwenke (Etalon AG)14/06/2016, 09:00
The presentation will report recent developments and applications of the Absolute Multiline Technology. Examples are the deformation measurements of telescopes or the monitoring of large CMM. It will also introduce a company/institute wide installation to deliver the "absolute meter" to different applications.
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Mr Solomon William Kamugasa (CERN)14/06/2016, 09:20
We present our strategy for fiducialising CLIC components within the final PACMAN alignment bench using Frequency Scanning Interferometry (FSI). We have developed a device to enable Absolute Multiline Technology perform absolute distance measurement to targets in different directions from the same point. This allows us to employ the multilateration technique to determine the coordinates of...
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Dr Michael Campbell (NPL)14/06/2016, 09:40
Two questions for which people ask for help from NPL are: ‘How good is my instrument?’ and ‘what are the uncertainties associated with my measurements?’ At NPL we felt an instrument was needed which would inherently answer these questions with every measurement. Therefore we have built a coordinate measurement system that is self-calibrating with compensation for systematic errors, calculates...
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Dr Samuel Lévêque (ESO)14/06/2016, 10:00
The “Absolute Multiline” has recently been tested on the Very Large Telescope (VLT) to monitor the Rigid Body Motion between its primary and secondary mirrors by forming an optical hexapod. This test is part of a more general evaluation of the adequacy, performance and robustness of such a measuring technique for monitoring the inter-mirror position of the future European Extremely Large...
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Prof. Christophe Guy R Collette (Libre Université de Bruxelles)14/06/2016, 10:50
This talk presents an active vibration isolation strategy combining centralized interferometric inertial control and decentralized force control loops. The strategy will be illustrated on simple models, and then applied to isolate an extended structure from ground vibration. Preliminary experimental results will be presented and discussed.
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Mr David Tshilumba (CERN)14/06/2016, 11:10
The objective of this research project is the design of a long range nano-positioning system for the CLIC electromagnets ($m ≅ 80kg$).
CLIC (Compact Linear Collider) is a next generation particle collider under study at CERN. The accelerator will operate beams of nanometric size ($1 nm$ ×$40 nm$) and produce a high density of collisions at the interaction cross section ($2$ x $10^{34}$ ...
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Mr Peter Novotny (CERN)14/06/2016, 11:30
Specific requirements for vibrational characterisation and isolation of big scientific projects like CLIC have led to the development of the seismic sensors which utilise different types of sub-nanometric displacement transducers to measure relative displacement between an inertial mass and the sensor housing. Considering the nature of accelerator environment, magnetic based transducers are...
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Ms Jennifer Watchi (Université Libre de Bruxelles)14/06/2016, 11:50
Precision engineering tasks require active isolation systems that are efficient especially at low frequencies. The limitations of such control systems include the resolution of the sensor used and the magnetic coupling between the sensor and the actuator. In order to bypass these limitations, inertial sensors using Michelson interferometer are being developed. A first prototype has been built...
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Dr Marco Pisani (INRIM)14/06/2016, 12:10
After an introduction on the principles of laser interferometry, the most popular interferometers (Michelson and Fabry-Perot) will be briefly described. Then, practical realization set-up (homodyne, heterodyne synthetic wavelength) and related application fields will be discussed. Finally, particular attention will be given to short distance interferometers and to the techniques used to...
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Prof. Martine Lumbreras (University of Lorraine)14/06/2016, 14:00Paper and Poster
In the Strategy for equality between women and men 2010-2015 (European Commission 2010) the link with gender balance and competitiveness is again emphasised: «The prevailing gender imbalance in science and research is still a major obstacle to the European objective of increasing competitiveness and maximising innovation potential».
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In spite of the young global disaffection with all the... -
Mr Botond Barabas (National Instruments)14/06/2016, 14:30
Botond Barabás, manager of the National Instruments Hungary Innovation Program is going to present the background of the program and the possibilities it holds for young researchers across Europe. Through this program early stage researchers and hardware startups can validate their ideas by building a proof of concept based on NI’s technology.
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Ben Hughes (NPL)15/06/2016, 08:15
This short presentation will cover the concept of the metrology loop and introduce some examples of error sources that can affect dimensional measurement systems and how these errors can be mitigated.
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Ms Claude Sanz (CERN)15/06/2016, 08:35
The PACMAN project's aim is to develop and build a pre-alignment bench on which components are assembled and aligned to the required accuracy using a stretched wire. During the process of this measurement, the centre of a stretched wire is aligned with respect to the reference axis of the components. The Cu-Be wire with a diameter of 0.1 mm considered for this task has been evaluated. The...
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Prof. Thomas Touzé (HES-SO : UAS Western Switzerland)15/06/2016, 08:55
In underground geodetic networks, the orientation along the tunnel is generally limited in precision and reliability by, on one hand, the "corridor" configuration of the network and, on the other hand, by lateral refraction effects. As a stretched wire, if it is protected from air drafts, belongs to a section of a catenary function inside a vertical plan, it can be used as a precise and...
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Mr Vasileios Vlachakis (CERN)15/06/2016, 09:15
In the frame of the Particle Accelerator Components’ Metrology and Alignment to the Nanometre scale (PACMAN) project, we develop the micro-triangulation method for the magnet fiducialization. The wire detection algorithm and the wire reconstruction algorithm are the most important parts of this study. High accuracy robotic theodolites observe the stretched wire, used for the determination of...
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Dr Markus Aicheler (Helsinki Institute of Physics (FI))15/06/2016, 10:05
In this presentation we will show the path which the CLIC module has come over the last years, where we are today and finally, where we plan to go and how we plan to go there. In particular, the state of the module design with respect to the CDR version from 2012 and the experimental work for the study will be presented. Additionally, we will highlight how PACMAN influences our future...
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Prof. Lee Margetts (University of Manchester)15/06/2016, 10:25
The finite element method is a well established technique used to predict the performance of engineering materials, components and structures under a range of environmental and loading conditions (Smith et al, 2014). In recent work, the authors have investigated why cracks in nuclear graphite bricks do not appear in the same location as predicted by simulation. We have shown that one of the...
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Mr Iordan Petrov Doytchinov (CERN)15/06/2016, 10:45
Presentation
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Helene Mainaud Durand (CERN)15/06/2016, 11:05
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Mr Gianni Caiafa (Universita e INFN, Napoli (IT))
For accelerator magnets such as capture solenoids, fragment separator dipoles and insertion quadrupoles, it is important to measure not only the integrated field errors but also the local field distributions in the magnet extremities. In three-dimensional field problems the transversal multipole coefficients do not constitute a complete orthogonal function set. This gives rise to...
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Mr Alessandro Parrella (Instituto Superior Tecnico (PT))
In recent years, the need for replacing the materials for the construction of several accelerator components has arisen from the framework of the high-luminosity upgrade for the Large Hadron Collider (HL-LHC). To address this, new materials have been considered, and a proper characterization of their magnetic properties has become essential. This poster describes the magnetic measurement...
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Mr Jan Henry Hetzel (Forschungszentrum Jülich)
For the High-Energy Storage Ring (HESR) of the future Facility of Antiproton and Ion Research (FAIR) 44 bending magnets are being produced.
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For beam dynamics simulations the precise knowledge of the harmonic content of their magnetic field is of major importance.
As the magnets are strongly bent (approximately 8.2 degrees with a total length of approximately 4.5 m) a measurement based on a... -
Mr Luca Sabato (Universita del Sannio (IT))
Bunch length measurement in linear accelerators can be carried out using a Radio Frequency Deflector (RFD). A RFD provides a transverse kick (vertical or horizontal) to the beam introducing a correlation between the longitudinal and the transverse coordinates of the bunch. Therefore, the bunch length can be obtained by means of a transverse beam size measurement on a screen, placed after the...
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Ms Claude Sanz (CERN)
A rotatory mount is being designed in CERN to determine the position of the axis of a 0.1 mm in diameter stretched wire with a sub-micron accuracy.
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As part of its role as world-wide leader in high energy particle physics, CERN studies the feasibility of a Compact Linear Collider (CLIC). One of the biggest challenges of this electron-positron collider is the alignment required for all the...
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