Keyword: software
Paper Title Other Keywords Page
MOCO01 Online Touschek Beam Lifetime Measurement Based on the Precise Bunch-By-Bunch Beam Charge Monitor SRF, storage-ring, injection, electron 35
 
  • B. Gao, F.Z. Chen, Y.B. Leng
    SSRF, Shanghai, People’s Republic of China
  • Y.M. Zhou
    SINAP, Shanghai, People’s Republic of China
 
  Beam current and lifetime are the most important parameters to characterize the beam and machine quality of an electron storage ring. In order to describe the behavior of all electron bunches completely and accurately, a precisely bunch-by-bunch charge monitor has been developed at SSRF. Method called two-point equilibrium sampling is introduced to avoid the influence of longitudinal oscillation on the sampling point, thanks to this, the resolution of the BCM was below 0.2 pC. Utilizing the advantages of BCM’s high refresh rate and high resolution, the system can meet the requirement of monitor the bunch-by-bunch beam lifetime, measure touschek lifetime and vacuum lifetime. In this paper, experiments and and analysis will be described in detail.  
slides icon Slides MOCO01 [18.156 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-MOCO01  
About • paper received ※ 03 September 2019       paper accepted ※ 08 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUBO01 Screen materials for high precision measurements electron, site, embedded, GUI 1
 
  • B. Walasek-Höhne, P. Forck
    GSI, Darmstadt, Germany
  • R. Ischebeck
    PSI, Villigen PSI, Switzerland
  • G. Kube
    DESY, Hamburg, Germany
 
  Funding: This project has received funding from the European Union’s Horizon 2020 programme under Grant Agreement No 730871.
Scintillation screens made of various inorganic materials are widely used for transverse beam profile diagnostics at all kinds of accelerators. The monitor principle is based on the particles’ energy loss and its conversion to visible light. The resulting light spot is a direct image of the two-dimensional beam distribution. For large beam sizes standard optical techniques can be applied, while for small beam sizes dedicated optical arrangements have to be used to prevent for image deformations. In the modern linac based light sources scintillator usage serves as an alternative way to overcome limitations related to coherent OTR emission. Radiation damages and intensity based saturation effects, in dependence of the screen material, have to be modelled. In this talk, an introduction to the scintillation mechanism in inorganic materials will be given including practical demands and limitations. An overview on actual applications at hadron and electron accelerators will be discussed as summary of the Joint ARIES-ADA Workshop on ’Scintillation Screens and Optical Technology for transverse Profile Measurements’ held in Kraków, Poland.
 
slides icon Slides TUBO01 [27.172 MB]  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPP015 Wire Scanner Diagnostic System controls, diagnostics, ion-source, hardware 321
 
  • S. Grulja, S. Cleva, R. De Monte, M. Ferianis
    Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
 
  Elettra Sincrotrone Trieste Research Center (Elettra) is one of the Italian Institutions, together with Istituto Nazionale di Fisica Nucleare (INFN) and Consiglio Nazionale delle Ricerche (CNR), committed to the realization of the Italian in-kind contributions for the European Spallation Source. One part of the Elettra in-kind contributions to the proton accelerator is the construction of acquisition system for ESS Wire Scanner (WS).This paper presents an overview of the diagnostic system of the ESS Wire Scanner, including the first measurements with beam performed at CERN on LINAC4.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP015  
About • paper received ※ 04 September 2019       paper accepted ※ 07 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPP037 Studies of the Time Structure of Ionisation Beam Profile Measurements in the ISIS Extracted Proton Beamline simulation, space-charge, proton, electron 407
 
  • C.C. Wilcox, W.A. Frank, A. Pertica, R.E. Williamson
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
 
  Ionisation Profile Monitors (IPMs) are used at the ISIS neutron and muon source to perform non-destructive transverse beam profile measurements. An in-house particle tracking code, combined with 3D CST modelling of the electric fields within the monitors, has been used to improve understanding of the various error sources within the IPMs, and shows close agreement with profile measurements in the synchrotron. To allow for detailed benchmarking studies, an IPM has been installed in Extracted Proton Beamline 1 (EPB1), enabling comparison with secondary emission (SEM) grid measurements. However, the IPM measurements taken in EPB1 show increased levels of profile broadening at operational beam intensities, which are not reproduced by SEM measurements or simulation. To investigate these differences, studies of the time structure of measured profiles are being performed. This paper details the development of new, high-speed multichannel data acquisition electronics, required to perform these studies. Resulting measurements are discussed, along with an analysis of the data’s time structure and a comparison with that predicted by the IPM code.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP037  
About • paper received ※ 04 September 2019       paper accepted ※ 11 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPP044 Multiple Synchrotron Light Monitors for Transverse Matching and Monitoring at CEBAF emittance, synchrotron, quadrupole, radiation 436
 
  • B.G. Freeman, J. Gubeli, M.G. Tiefenback
    JLab, Newport News, Virginia, USA
 
  Funding: DOE Contract No. DE-AC05-06OR23177
Beam setup at the Continuous Electron Beam Accelerator Facility (CEBAF) involves threading beam through the machine, monitoring global transfer functions to identify and address cumulative lattice errors. Transverse beam emittance may grow by as much as two orders of magnitude, mediated by synchrotron radiation. Re-matching the enlarged beam phase space into successive re-circulation arcs minimizes this emittance growth but requires knowledge of the actual beam distribution. This is now accomplished through quadrupole scans using wire profile monitors, the most time-consuming activity in our setup process. We propose to use Synchrotron Light Monitors (SLMs) to image the beam at homologous points in the four super-period recirculation arc lattices. Benefits include real-time monitoring of beam parameters and reduced elapsed time for initial setup. These SLMs will be installed in Arc 7 of the CEBAF machine, where Synchrotron Radiation contributes moderately to emittance growth. One of four required SLMs will be installed and commissioned this year, with the rest being installed next year.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-TUPP044  
About • paper received ※ 04 September 2019       paper accepted ※ 08 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WECO02 Towards an Adaptive Orbit-Response-Matrix Model for Twiss-Parameter Diagnostics and Orbit Correction at Delta betatron, storage-ring, electron, feedback 477
 
  • S. Koetter, T. Weis
    DELTA, Dortmund, Germany
 
  At DELTA, a 1.5-GeV electron storage ring operated by the TU Dortmund University, preliminary tests of an adaptive orbit-response-matrix model were conducted. Closed orbit perturbations corrected by the slow orbit feedback can be buffered and used to update a fit of the bilinear-exponential model with dispersion (BE+d model). This model is a representation of the orbit-response matrix depending on the beta functions, the betatron phases and the tunes in both planes. This work introduces a new fitting recipe to obtain good estimates of the aforementioned quantities and evaluates a BE+d-model represented orbit-response matrix for orbit correction. Numerical studies are shown along with measurement results.  
slides icon Slides WECO02 [0.657 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WECO02  
About • paper received ※ 04 September 2019       paper accepted ※ 08 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPP034 Optics-Measurement-Based BPM Calibration optics, factory, collider, dipole 604
 
  • A. García-Tabarés Valdivieso, R. Tomás
    CERN, Geneva, Switzerland
 
  Beam position monitors (BPMs) are key elements in accelerator operation, providing essential information about different beam parameters that are directly related to the accelerator performance. In order to obtain an accurate conversion from an induced voltage to the center of charge position, the BPMs have to be calibrated prior to its installation in the accelerator. This calibration procedure can only be performed when the accelerator is in a period of non-activity and does not completely reproduce the exact conditions that occur during the machine operation. Discrepancies observed during the optics measurements at the Large Hadron Collider and the Proton Synchrotron Booster show that the impact of the BPM calibration factors on the optics functions was greater than expected from the design values and tolerances. Measurement of the optics functions allows obtaining extra information on BPM calibration together with its associated uncertainty and resolution. The optics measurement based calibration allows further developing new techniques for computing optics functions that are biased by a possible miss-calibration such as beta function, dispersion function and beam action.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP034  
About • paper received ※ 04 September 2019       paper accepted ※ 10 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPP045 Development of an Automated BPM Test Bench linac, controls, instrumentation, diagnostics 649
 
  • M. Schwarz, H. Podlech
    IAP, Frankfurt am Main, Germany
  • H. Höltermann, B. Koubek, U. Ratzinger, W. Schweizer, D. Strehl, C. Trageser
    BEVATECH, Frankfurt, Germany
 
  The Institute for Applied Physics (IAP) of Goethe University Frankfurt has a long history in developing DTL-cavities and further essential components of particle accelerators from design and simulation up to tuning and final testing. In recent times, the development of beam diagnostic components for the hadron accelerator projects has become increasingly important. Bevatech is designing and setting up linear accelerators, RF and vacuum technology for research laboratories and enterprises worldwide. In a joint effort a simple, efficient and mobile beam position monitor (BPM) test bench has been developed and will be further improved for future tests and the calibration of beam position monitors. It is fully automated using single-board computers and microcontrollers to obtain the essential calibration data like electrical offset, button sensitivity and the 2D response map. In addition, initial tests with the implementation and evaluation of the Libera signal processing units Single Pass H and Spark were promising.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-WEPP045  
About • paper received ※ 03 September 2019       paper accepted ※ 10 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THAO03 ROSE - a Rotating 4D Emittance Scanner emittance, MMI, quadrupole, electronics 668
 
  • M.T. Maier, L. Groening, C. Xiao
    GSI, Darmstadt, Germany
  • A. Bechtold
    NTG, Gelnhausen, Germany
  • J.M. Maus
    NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany
 
  The detector system ROSE, allowing to perform 4D emittance measurements on heavy ion beams independent of their energy and time structure, has been built and successfully commissioned in 2016 at GSI in Darmstadt, Germany. This method to measure the four dimensional emittance has then been granted a patent in 2017. The inventors together with the technology transfer department of GSI have found an industrial partner to modify ROSE into a fully standalone, mobile emittance scanner system. This is a three step process involving the ROSE hardware, the electronics ROBOMAT and the software working packages. The electronics was commissioned at the ECR test bench of the Heidelberg ion therapy facility HIT in June 2019. Currently our main focus is on the development of the 4D software package ROSOFT. This contribution presents the actual status and introduces the multiple possibilities of this 4D emittance scanner.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2019-THAO03  
About • paper received ※ 03 September 2019       paper accepted ※ 10 September 2019       issue date ※ 10 November 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)