Keyword: vacuum
Paper Title Other Keywords Page
MOP03 Status Overview of the HESR Beam Instrumentation pick-up, controls, instrumentation, impedance 23
  • C. Böhme
    FZJ, Jülich, Germany
  • A.J. Halama, V. Kamerdzhiev, G.R. Rupsch
    GSI, Darmstadt, Germany
  The High Energy Storage Ring (HESR), within the FAIR project, will according to current planning provide anti-proton beams for PANDA and heavy ion beams for a.o. SPARC. With the beam instrumentation devices envisaged in larger quantities, e.g. BPM and BLM, testing is well underway. Other beam instrumentation instruments like Viewer are in late production stage, Scraper is being tested and for the IPM the 1st of series production has started. An overview of the status of the work package beam instrumentation will be presented as well as test bench results of already produced instruments.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP03  
About • Received ※ 08 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 28 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
MOP21 First Results of PEPITES, A New Transparent Profiler Based on Secondary Electrons Emission for Charged Particle Beams electron, proton, radiation, detector 80
  • C. Thiebaux, L. Bernardi, F. Gastaldi, Y. Geerebaert, R. Guillaumat, F. Magniette, P. Manigot, M. Verderi
    LLR, Palaiseau, France
  • É. Delagnes, F.T. Gebreyohannes, O. Gevin
    CEA-IRFU, Gif-sur-Yvette, France
  • F. Haddad, N. Servagent
    SUBATECH, Nantes, France
  • F. Haddad, C. Koumeir, F. Poirier
    Cyclotron ARRONAX, Saint-Herblain, France
  Funding: This study is supported by two programs of the Agence Nationale de la Recherche, ANR-17-CE31-0015 and ANR-11-EQPX-0004.
The PEPITES project* consists of a brand new operational prototype of an ultra-thin, radiation-resistant profiler capable of continuous operation on mid-energy (O(100 MeV)) charged particle accelerators. Secondary electron emission (SEE) is used for the signal because it only requires a small amount of material (10 nm); very linear, it also offers good dynamics. The lateral beam profile is sampled using segmented electrodes, constructed by thin film methods. Gold strips, as thin as the electrical conductivity allows (~ 50 nm), are deposited on an insulating substrate as thin as possible. While crossing the gold, the beam ejects the electrons by SEE, the current thus formed in each strip allows the sampling. SEE was characterized at ARRONAX with 68 MeV proton beams and at medical energies at CPO**. Electrodes were subjected to doses of up to 109 Gy without showing significant degradation. A demonstrator with dedicated electronics (CEA) is installed at ARRONAX and will be used routinely with proton beams of 17-68 MeV for intensities of 100fA to 100nA. An overview of the design and first measurements will be presented, and system performances will be assessed.
*LLR, ARRONAX cyclotron and CEA
**Orsay Protontherapy Center (Institut Curie)
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP21  
About • Received ※ 07 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 30 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
MOP22 Development of New Beam Position Detectors for the NA61/SHINE Experiment detector, proton, experiment, target 84
  • M.U. Urbaniak, Y. Balkova, S.K. Kowalski, S. Puławski, K.W. Wójcik
    University of Silesia in Katowice, Katowice, Poland
  NA61/SHINE is a fixed-target experiment located at CERN Super Proton Synchrotron. The development of new beam position detectors is part of the ongoing upgrade of the detector system. Two types of detectors have been manufactured and tested. The first one is a scintillating fibers detector with photomultiplier as a readout. The scintillating fibers detector consists of two ribbons, which are arranged perpendicularly to each other. Each ribbon is made of two layers of 250 µm diameter fibers. The grouping method was used, which allows using of a single multichannel photomultiplier for one detector. The second type of detector is based on the single-sided silicon strip detector (SSD). In this project, Si strips produced by Hamamatsu (S13804) were used, where the pitch has a width equal to 190 um. The developed detectors must meet several requirements: should work efficiently with proton and lead beams with beam intensity on the level of 100 kHz, the detector’s material on the beamline should be minimized, the detectors should be able to determine the position of X and Y hit of each beam particle with maximum possible accuracy. During my speech I will present the results of our work.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP22  
About • Received ※ 06 September 2022 — Revised ※ 09 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 13 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
MOP34 New X-Rays Diagnostics at ESRF: The X-BPMs and the Halo-Monitor electron, diagnostics, SRF, detector 125
  • E. Buratin, K.B. Scheidt
    ESRF, Grenoble, France
  Two new X-ray diagnostics have been installed in the Front-Ends of the Storage Ring of the ESRF’s Extremely Brilliant Source (EBS) recently. Two independent optical X-BPMs at 23m distance from their bending magnet source-point are giving extremely useful additional information on the vertical beam stability in comparison to the e-BPMs data. A vertical beam Halo-monitor allows to measure permanently and quantitatively the level the electron density at large distance (1-3mm) from the beam core, in a non-destructive manner.  
poster icon Poster MOP34 [1.198 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-MOP34  
About • Received ※ 30 August 2022 — Revised ※ 09 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 27 November 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
TUP04 Beam Loss Monitor for Polish Free Electron Laser (PolFEL): Design and Tests detector, FEL, electron, radiation 225
  • R. Kwiatkowski, R. Nietubyc, J. Szewiński, D.R. Zaloga
    NCBJ, Świerk/Otwock, Poland
  • A.I. Wawrzyniak
    NSRC SOLARIS, Kraków, Poland
  Funding: European Regional Development Fund in the framework of the Smart Growth Operational Programme and Regional Operational Programme for Mazowieckie Voivodeship.
The Beam Loss Monitor (BLM) system is primarily used for machine protection and is especially important in the case of high energy density of accelerated beam, when such a beam could cause serious damages due to uncontrolled loss. PolFEL linear accelerator is designed with the beam parameters, which made BLM an essential system for machine protection. The design of BLM system for PolFEL is composed of several scintillation probes placed along and around the accelerator. The paper reports on design and first tests of prototype detector, which is planned to be used for PolFEL project. The prototype was tested in NCBJ and SOLARIS, using radioactive calibration samples and linear electron accelerator as a sources. We also present results of numerical investigation of radiation generated due to interaction of fast electrons with accelerator components.
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP04  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 19 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
TUP09 Design of the Beam Position Monitor for SOLEIL II impedance, lattice, site, synchrotron 233
  • M. El Ajjouri, F. Alves, A. Gamelin, N. Hubert
    SOLEIL, Gif-sur-Yvette, France
  The Beam Position Monitors for the SOLEIL low emittance upgrade project are in the design phase. Efforts are put on the minimization of the heat load on the button by optimizing the longitudinal impedance and the BPM materials. To validate the mechanical design and tolerances a first prototype has been manufactured and controlled. This paper presents the mechanical design of the BPM, the metrology of the prototype and the lessons learned from this prototyping phase.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP09  
About • Received ※ 10 September 2022 — Revised ※ 11 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 07 November 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
TUP13 Standard Button BPMs for PETRA IV simulation, electron, synchrotron, alignment 249
  • S. Strokov, M. Holz, G. Kube, D. Lipka, S. Vilcins
    DESY, Hamburg, Germany
  A new diffraction limited light source PETRA IV (DESY, Germany) with ultra-low emittance is currently being designed as an upgrade of the 3rd generation light source PETRA III. For transverse beam position measurements, beam position monitors (BPMs) will be used as an essential part of the beam diagnostic system. There will be a total of about 800 BPMs distributed along the 2.3 km storage ring. The inner diameter of the standard beam pipe, and therefore of most of the BPM chambers, will be 20 mm. The primary purpose of the systems is to provide high-resolution measurements of the transverse position of the electron beam. By specification, the impact of the mechanical tolerances on the position readings should be below 150 microns which is essential for the commissioning of the machine. To achieve this goal, the dependence of the accuracy of the beam position measurement on the tolerances of each manufactured part of the BPM was studied. This paper summarizes the development and optimization of each part of the BPM by using EM simulations performed with CST Studio Suite.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP13  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 12 September 2022 — Issue date ※ 01 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
TUP29 ZnO(In) Scintillation Light Spectra Investigation for Heavy Ion Detector Application radiation, heavy-ion, detector, proton 294
  • M. Saifulin, C. Trautmann
    TU Darmstadt, Darmstadt, Germany
  • P. Boutachkov, M. Saifulin, C. Trautmann, B. Walasek-Höhne
    GSI, Darmstadt, Germany
  • E.I. Gorokhova
    GOI, St Petersburg, Russia
  • P. Rodnyi, I.D. Venevtsev
    SPbPU, St. Petersburg, Russia
  Funding: DLR financed this research within the framework of the ERA. Net RUS Plus Project RUSST2017-051
ZnO-based ceramics are known as promising scintillators exhibiting light emission in the ultraviolet (UV) spectral region (~390 nm) and ultrafast decay times (<1 ns). They are of great interest for applications in scintillation counters and screens at high-energy heavy ion accelerators. In this contribution, the deterioration of scintillating properties of ZnO-based ceramics subjected to heavy ion exposure at high doses is investigated. The scintillation light spectra of ZnO(In) as a function of fluence for 4.8 MeV/u 48Ca and 197Au ions were studied. We observed that the deterioration of the scintillation intensity with increasing fluence follows the Birks-Black model.
* The results presented in this contribution are based on the work performed before the 24th of February, 2022.
** (corresponding author)
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-TUP29  
About • Received ※ 08 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 01 November 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
WEP10 Detection of a DC Electric Field Using Electro-Optical Crystals experiment, laser, polarization, space-charge 403
  • A. Cristiano, M. Krupa
    CERN, Meyrin, Switzerland
  • R. Hill
    University of Huddersfield, Huddersfield, United Kingdom
  Standard beam position monitors (BPM) are intrinsically insensitive to beams with no temporal structure, so-called DC beams, which many CERN experiments rely on. We therefore propose a novel detection technique in which the usual BPM electrodes are replaced with electro-optic (EO) crystals. When exposed to an electric field, such crystals change their optical properties. This can be exploited to encode the electric field magnitude onto the polarisation state of a laser beam crossing the crystal. An additional EO crystal, placed outside the vacuum chamber, can be used to control the system’s working point and to introduce a sinusoidal modulation, allowing DC measurements to be performed in the frequency domain. This contribution presents the working principle of this measurement technique, its known limitations, and possible solutions to further increase the system’s performance. Analytical results and simulations for a double-crystal optical chain are benchmarked against the experimental data taken on a laboratory test bench.  
poster icon Poster WEP10 [0.940 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP10  
About • Received ※ 07 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 15 September 2022 — Issue date ※ 03 December 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
WEP12 HL-LHC BPM System Development Status cryogenics, pick-up, electron, electronics 408
  • M. Krupa, I. Degl’Innocenti, D. Gudkov, G. Schneider
    CERN, Meyrin, Switzerland
  • D.R. Bett
    JAI, Oxford, United Kingdom
  The demanding instrumentation requirements of the future High Luminosity LHC (HL-LHC) require 44 newly designed Beam Position Monitors (BPM) to be installed around the ATLAS and CMS experiments in 2026-2028. Three BPM types are now in pre-series production, with two more variants under design. Close to the collision point, a set of cryogenic directive coupler BPMs equipped with a brand new acquisition system based on nearly-direct digitization will resolve the position of the two counter-rotating LHC beams occupying a common vacuum chamber. Other new button and stripline BPMs will provide not only the transverse beam position, but also timing signals for the experiments, and diagnostics for the new HL-LHC crab cavities. This contribution summarizes the HL-LHC BPM specifications, gives an overview of the new BPM designs, reports on the pre-series BPM production status and plans for series manufacturing, outlines the foreseen acquisition system architecture, and highlights the first beam measurements carried out with the proof-of-concept electronics for the directive stripline BPMs.  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP12  
About • Received ※ 09 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 11 September 2022 — Issue date ※ 03 October 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
WEP22 Experimental Investigation of Gold Coated Tungsten Wires Emissivity for Applications in Particle Accelerators detector, experiment, operation, controls 438
  • A. Navarro Fernandez, M. Martin Nieto, F. Roncarolo
    CERN, Meyrin, Switzerland
  The operation of wire grids and wire scanners as beam profile monitors can be heavily affected, both in terms of measurement accuracy and wire integrity, by the thermal response of the wires to the energy deposited by the charged particles. Accurate measurements of material emissivity are crucial, as Radiative Cooling represent the most relevant cooling process. In this work, we present a method for emissivity measurements of gold-coated tungsten wires based on calorimetric techniques. The dedicated electrical setup allowed allowed transient and steady state measurements for temperatures up to 2000 K. A theoretical description of the measurement technique will be followed up by the electrical set up description and a detailed discussion about the measured results and uncertainties.  
poster icon Poster WEP22 [1.586 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-IBIC2022-WEP22  
About • Received ※ 06 September 2022 — Revised ※ 10 September 2022 — Accepted ※ 13 September 2022 — Issue date ※ 16 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)