Author: Navarro Fernandez, A.
Paper Title Page
MOPAB120 Beam Instrumentation for the CERN LINAC4 and PSB Half Sector Test 408
 
  • F. Roncarolo, J.C. Allica Santamaria, M. Bozzolan, C. Bracco, S. Burger, G.J. Focker, G. Guidoboni, L.K. Jensen, B. Mikulec, A. Navarro Fernandez, U. Raich, J.B. Ruiz, L. Søby, J. Tan, W. Viganò, C. Vuitton, C. Zamantzas
    CERN, Geneva, Switzerland
  • T. Hofmann
    Royal Holloway, University of London, Surrey, United Kingdom
 
  The construction, installation and initial commissioning of CERN's LINAC4 was completed in 2016 with H ions successfully accelerated to its top energy of 160 MeV. The accelerator is equipped with a large number of beam diagnostic systems that are essential to monitor, control and optimize the beam parameters. A general overview of the installed systems and their functional specifications will be followed by a summary of the most relevant results. This includes transverse profile monitors (wire scanners, wire grids and a laser profile monitor), beam position and phase monitors (whose ToF measurements were essential for adjusting RF cavity parameters), beam loss monitors, beam current transformers and longitudinal beam shape monitors. This contribution will also cover the beam instrumentation for the so-called PSB Half Sector Test, which has been temporarily installed in the LINAC4 transfer line to study H stripping efficiency. At this facility it was possible to test the new H0/H beam current monitor, designed to monitor the stripping efficiency and an essential element of the beam interlock system when the LINAC4 is connected to the PSB in 2019.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB120  
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MOPIK041 Commissioning of the Stripping Foil Units for the Upgrade of the PSB H Injection System 595
 
  • C. Bracco, S. Burger, V. Forte, B. Goddard, G. Guidoboni, L.O. Jorat, B. Mikulec, A. Navarro Fernandez, R. Noulibos, F. Roncarolo, P. Van Trappen, W.J.M. Weterings
    CERN, Geneva, Switzerland
 
  The PSB will be extensively upgraded during the next long shutdown of the CERN accelerator complex, to double the brightness of the stored beams. The existing multi-turn injection will be replaced by a charge exchange system designed for the 160 MeV hydrogen ions provided by Linac4. Part of the injection equipment has been temporarily installed along the Linac4-to-PSB transfer line and tested with beam. This allowed to gain experience with the system, test the related diagnostics and benchmark calculations with measurements. An additional permanent stripping foil test stand is also installed right after the Linac and will be used to characterise new foils for possible future applications. The main outcomes, issues and applied or planned mitigations are presented for both installations.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK041  
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MOPIK047 Commissioning and Results of the Half-Sector Test Installation with 160 MeV H beam from Linac4 619
 
  • B. Mikulec, D. Aguglia, J.C. Allica Santamaria, C. Baud, C. Bracco, S. Burger, G. Guidoboni, L.O. Jorat, C. Martin, A. Navarro Fernandez, R. Noulibos, F. Roncarolo, J.L. Sanchez Alvarez, J. Tan, T. Todorcevic, P. Van Trappen, W.J.M. Weterings, C. Zamantzas
    CERN, Geneva, Switzerland
 
  During the Long Shutdown 2 (LS2) at CERN in 2019/20, the Proton Synchrotron Booster (PSB) will undergo a profound upgrade in the framework of the LHC Injector Upgrade (LIU) project involving also the connection to the new Linac4 injector. The 160 MeV Linac4 H' injection entails a complete replacement of the PSB injection section, including a stripping foil system, injection chicane, an H0/H' dump and novel beam instrumentation. The equivalent of half of this new injection chicane was temporarily installed in the Linac4 transfer line to evaluate the performance of the equipment and prepare controls, interlocks and applications for the connection. Outcomes of this so-called Half-Sector Test (HST) are presented in this paper.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPIK047  
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