Explanipedia

SRF Cryogenic Test Facility for the HL-LHC Open

L. Tavian, G. Vandoni, W. Venturini Delsolaro · 2024

Several test stands were assembled for testing integrated operation of individual components with and without beam. Amongst these, at CERN, the SPS SRF test stands allows to qualify crab cavity modules with beam, while the test facilities …

Temperature measurement on copper surfaces for superconducting thin film cavity applications Open

A. Bianchi, G. Vandoni, Walter Venturini Delsolaro · 2023

Superconducting radio-frequency (SRF) thin film cavities on copper substrates are employed in several particle accelerators. However, these SRF cavities historically featured a progressive performance degradation with the accelerating fiel…

Temperature Measurement on Copper Surfaces for Superconducting Thin Film Cavity Applications Open

A. Bianchi, G. Vandoni, Walter Venturini Delsolaro · 2023

Superconducting radio-frequency (SRF) thin film cavities on copper substrates are employed in several particle accelerators. However, these SRF cavities historically featured a progressive performance degradation with the accelerating fiel…

Synthesis of Nb and Alternative Superconducting Film to Nb for SRF Cavity as Single Layer Open

Řeža Valizadeh, Claire Antoine, Eduard Chyhyrynets, P. Goudket, Adrian Hannah , et al. · 2022

"Bulk niobium (Nb) has been the material of choice for superconducting RF (SRF) cavities but for further improvement in cavity RF performance, one may have to turn to films of Nb and to other superconducting materials deposited on copper a…

Main Highlights of ARIES WP15 Collaboration Open

O.B. Malyshev, P. Goudket, Řeža Valizadeh, Claire Antoine, O. Azzolini , et al. · 2022

An international collaboration of research teams from CEA (France), CERN (Switzerland), INFN/LNL (Italy), HZB and USI (Germany), IEE (Slovakia), RTU (Latvia) and STFC/DL (UK), are working together on better understanding of how to improve …

First demonstration of the use of crab cavities on hadron beams Open

R. Calaga, A. Alekou, Fanouria Antoniou, R. B. Appleby, L Arnaudon , et al. · 2021

Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at the interaction point (IP). A first demonstration experiment of crabbing with hadron beams was successfully carrie…

Machine Protection Experience from Beam Tests with Crab Cavity Prototypes in the CERN SPS Open

Björn Hans Filip Lindström, Hannes Bartosik, Thomas Bohl, A. Butterworth, R Calaga , et al. · 2019

Crab cavities (CCs) constitute a key component of the High Luminosity LHC (HL-LHC) project. In case of a failure, they can induce significant transverse beam offsets within tens of microseconds, necessitating a fast removal of the circulat…

Quench localisation in SRF cavity tests with transition edge sensors Open

H. Furci, G. Vandoni, A. Macpherson, Simon Barriere, Alejandro Castilla , et al. · 2019

Transition edge sensors (TES) have recently been developed at CERN as second sound detectors for quench localisation on superconducting radio frequency (SRF) cavities. After validation of the concept of heat source localisation by TES in t…

Heat source localisation by trilateration of helium II second sound detected with transition edge sensors thermometry Open

H. Furci, Tobias Stegmaier, T. Koettig, G. Vandoni · 2019

The detection of second sound in He-II can be exploited during superconducting\ncavity testing to locate the germ of a quench. The sudden appearance of a hotspot generates this\nwave in the helium II bath, which is routinely detected by Os…

An SRF Test Stand in High Intensity and High Energy Proton Beams Open

G. Vandoni, Kurt Artoos, V. Baglin, K. Brodzinski, R. Calaga , et al. · 2019

In the framework of HL-LHC, a new infrastructure was installed in 2018, to test SRF structures in the proton beams of the SPS. Scope of the test stand is to study the operational performance of crab cavities for HL-LHC – more generally, SR…

Thermal Mapping of SRF Cavities by Second Sound Detection With Transition Edge Sensors and Oscillating Superleak Transducers Open

G. Vandoni, H. Furci, T. Koettig, A. Macpherson, Katarzyna Turaj , et al. · 2019

The SRF cavity testing facilities at CERN include four vertical cryostat stations in SM18 and a cryostat for small cavities in the Cryolab. A large range of structures are tested, from Nb thin film cavities for HIE-Isolde and LHC, to bulk …

Emittance growth in coast in the SPS at CERN Open

Fanouria Antoniou, A. Alekou, Hannes Bartosik, Thomas Bohl, R. Calaga , et al. · 2018

The HL-LHC prototype crab-cavities are installed in the CERN SPS, which, for the first time, will allow for a comprehensive beam test with high energy protons. As the time available for experimental beam dynamics studies with the crab cavi…

The SPS Tests of the HL-LHC Crab Cavities Open

R. Calaga, Ofelia Capatina, G. Vandoni · 2018

Two superconducting crab cavities in the framework of the High Luminosity (HL-LHC) LHC were built to test for the first time with proton beams in the Super Proton Synchrotron (SPS) at CERN. These tests will address the operation of the cra…

Transition edge sensors for quench localization in SRF cavity tests Open

H. Furci, Zsolt Kovács, T. Koettig, G. Vandoni · 2017

Transition Edge Sensors (TES) are bolometers based on the gradual superconducting transition of a thin film alloy. In the frame of improvement of non-contact thermal mapping for quench localisation in SRF cavity tests, TES have been develo…

Status of the HIE-ISOLDE project at CERN Open

Fraser, Yacine Kadi, D. Voulot, E. Siesling, A. P. Bernardes , et al. · 2017

The HIE-ISOLDE project represents a major upgrade of the ISOLDE nuclear facility with a mandate to significantly improve the quality and increase the intensity and energy of radioactive nuclear beams produced at CERN. The project will expa…

HIE-ISOLDE SC Linac Progress and Commissioning in 2016 Open

Walter Venturini Delsolaro, D. Smekens, Jean-Christophe Gayde, U. Wagner, José Rodríguez , et al. · 2017

The HIE-ISOLDE project (High Intensity and Energy ISOLDE) reached an important milestone in October 2015 when the first physics run was carried out with radioactive Zn beams at 4 MV/m. This is a first stage in the upgrade of the REX post-a…

Thermal Design and Performance results of the first High-Beta Cryo-module for HIE-ISOLDE at CERN Open

Luca Valdarno, N. Delruelle, Yann Leclercq, V. Parma, G. Vandoni , et al. · 2015

The High Energy and Intensity HIE-ISOLDE is a facility under construction at CERN whose target is ultimately, after the installation of six cryo-modules, to produce radioactive ion beams at 10MeV/u maximum energy in order to significantly …

Compact Crab Cavity Cryomodule : Deliverable: D4.4 Open

Kurt Artoos, S.A.E. Langeslag, A. Macpherson, Thomas C. Jones, Luca Dassa , et al. · 2015

Propagation of Radioactive Contaminants Along the Isolde Beamline Open

R. Kersevan, Marton Ady, A. Dorsival, Alexandre Gottberg, Maddalena Maietta , et al. · 2015

The vacuum system of RIB facilities is entirely hermetical, with storage of effluents and controlled release to atmosphere after a decay time. In Isolde, distributed primary pumping is sectorized in three parts, but all effluents are conve…

Crab Cavity and Cryomodule Development for HL-LHC Open

Federico Carra, S. Belomestnykh, Shrikant Pattalwar, A. Boucherie, A. Macpherson , et al. · 2015

The HL-LHC project aims at increasing the LHC luminosity by a factor 10 beyond the design value. The installation of a set of RF Crab Cavities to increase bunch crossing angle is one of the key upgrades of the program. Two concepts, Double…

Design of Dressed Crab Cavities for the HL-LHC Upgrade Open

Carlo Zanoni, S. Belomestnykh, Shrikant Pattalwar, Federico Carra, Graeme Burt , et al. · 2015

The HL-LHC upgrade relies on a set of RF crab cavities for reaching its goals. Two parallel concepts, the Double Quarter Wave (DQW) and the RF Dipole (RFD), are going through a comprehensive design process along with preparation of fabrica…

Status of the SRF Systems at HIE-ISOLDE Open

Walter Venturini Delsolaro, L Arnaudon, Kurt Artoos, Caterina Bertone, Jean-Alexandre Bousquet , et al. · 2015

The HIE-ISOLDE project has been approved by CERN in 2009 and gained momentum after 2011. The final energy goal of the upgrade is to boost the radioactive beams of REX-ISOLDE from the present 3 MeV/u up to 10 MeV/u for A/q up to 4.5. This i…

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