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.
The importance of alignment for emittance preservation will be high-lighted.
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.
The talk will introduce the technical objectives of the project as well as the first results obtained.
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...
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....
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...
In the Advanced RF application on the NI platform presentation the following topics are covered:
• 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...
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...
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.
Nowadays, the printed circuit boards (PCB) technology is the predominant...
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...
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...
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.
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...
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.
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 $10^{34}$ ...
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...
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».
In spite of the young global disaffection with all the...
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.
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.
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...
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...
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...
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...
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...
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...
For the High-Energy Storage Ring (HESR) of the future Facility of Antiproton and Ion Research (FAIR) 44 bending magnets are being produced.
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...
