Recommissioning of the CERN Injector Complex Beam Instrumentation
7
R. Veness
CERN, Meyrin, Switzerland
During the last two years, the CERN injector complex has been completely renovated with the aim of providing high intensity and smaller emittance beams to the LHC. A new Linac providing H− has been constructed and major upgrades in the Proton Synchrotrons (PS Booster ring, PS ring and Super PS ring) have been performed. A full suite of new beam diagnostics has been implemented and commissioned. This includes fast wire scanners, beam gas ionization monitors, quadrupolar pick-ups and diamond beam loss detectors. New radiation-hard beam position monitoring system was also successfully deployed in the SPS. This talk will present an overview of the performance of the newly built instruments.
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Summary of the ARIES Workshop on Materials and Engineering Technologies for Particle Accelerator Beam Diagnostic Instruments
16
P. Forck
GSI, Darmstadt, Germany
D. Eakins
University of Oxford, Oxford, United Kingdom
U. Iriso
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
O.R. Jones, R. Veness
CERN, Meyrin, Switzerland
G. Kube, K. Wittenburg
DESY, Hamburg, Germany
V. Schlott
PSI, Villigen PSI, Switzerland
Funding:This project has received funding from the European Union’s Horizon 2020 Research and Innovation programme under Grant Agreement No 730871. ARIES* is an EU-sponsored programme for accelerator research and innovation. An international Workshop was held online as part of this programme in June 2021 on the topic of ’Materials and Engineering Technologies for Particle Accelerator Beam Diagnostic Instruments’. The aim of the Workshop was to bring together instrument designers, experts and industry and research groups to review the state of the art in the field, present designs and discuss future challenges, whilst also developing and strengthening collaborations between groups. There were sessions covering ’Instrument design and operation’, ’Novel materials and applications’ and ’New technology and components’ over the three half-days of the on-line meeting. This paper will review the key topics presented at the workshop along with a summary of discussions held and proposed directions for future studies. * https://aries.web.cern.ch
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Commissioning of Timepix3 Based Beam Gas Ionisation Profile Monitors for the CERN Proton Synchrotron
172
H.S. Sandberg, D. Bodart, S. Jensen, S. Levasseur, G. Schneider, J.W. Storey, R. Veness
CERN, Meyrin, Switzerland
W. Bertsche
UMAN, Manchester, United Kingdom
S.M. Gibson
Royal Holloway, University of London, Surrey, United Kingdom
K. Satou
KEK, Ibaraki, Japan
A pair of operational Beam Gas Ionisation (BGI) profile monitors was installed in the CERN Proton Synchrotron (PS) at the beginning of 2021. These instruments use Timepix3 hybrid pixel detectors to continuously measure the beam profile throughout the cycle in the horizontal and vertical planes. In the weeks following their installation, both BGI’s were commissioned in situ by equalizing and tuning the thresholds of the Timepix3 detectors. First measurements were taken during the beam commissioning period, demonstrating the operational readiness of the instruments. Sextupolar components originating from the magnetic shield in the vertical BGI magnet were later discovered and required compensation to reduce their effect on the PS beams. With the compensation in place, operational measurements could be started and provided new insights into the dynamics of the PS beam cycles.
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J. Emery, W. Andreazza, D. Belohrad, S. Di Carlo, J.C. Esteban Felipe, A. Goldblatt, D. Gudkov, A. Guerrero, S. Jackson, G.O. Lacarrere, M. Martin Nieto, A.T. Rinaldi, F. Roncarolo, C. Schillinger, R. Veness
CERN, Meyrin, Switzerland
A novel generation of fast Beam Wire Scanners (BWS), developed in the framework of the LHC Injectors Upgrade (LIU), has been recently deployed in the 3 LHC injector synchrotrons, accelerating protons from 160 MeV to 450 GeV, during the 2019-2020 LHC long shutdown. The monitors feature high precision motor controller, high resolution wire position monitoring and wide dynamic range secondary particles detectors. This contribution will document the commissioning of the 17 new systems during the accelerator complex restart in 2021, which is an exciting and challenging phase in the life cycle of an instrument. A summary of the so far achieved levels of reliability, reproducibility, detectors/DAQ bandwidth and overall accuracy, will be used to revisit the options for further improving the systems’ performance in the future.
The HL-LHC Beam Gas Vertex Monitor - Performance and Design Optimisation Using Simulations
249
B. Kolbinger, H. Guerin, O.R. Jones, R. Kieffer, T. Lefèvre, A. Salzburger, J.W. Storey, R. Veness, C. Zamantzas
CERN, Meyrin, Switzerland
S.M. Gibson, H. Guerin
Royal Holloway, University of London, Surrey, United Kingdom
The Beam Gas Vertex (BGV) instrument is a novel non-invasive beam profile monitor and part of the High Luminosity Upgrade of the Large Hadron Collider (LHC) at CERN. Its aim is to continuously measure emittance and transverse beam profile throughout the whole LHC cycle, which has not yet been achieved by any other single device in the machine. The BGV consists of a gas target and a forward tracking detector to reconstruct tracks and vertices resulting from beam-gas interactions. The beam profile is inferred from the spatial distribution of the vertices, making it essential to achieve a very good vertex resolution. Extensive simulation studies are being performed to provide a basis for the design of the future BGV. The goal of the study is to ascertain the requirements for the tracking detector and the gas target within the boundary conditions provided by the feasibility of integrating it into the LHC, budget and timescale. This contribution will focus on the simulations of the forward tracking detector. Based on cutting-edge track and vertex reconstruction methods, key parameter scans and their influence on the vertex resolution will be discussed.
