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Patrizia Azzi (INFN Padova (IT))08/10/2020, 09:00
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Jean Francois Croteau08/10/2020, 09:30
Seamless SRF cavities have been proposed to improve performances (i.e. higher quality factor at high accelerating gradients) and reduce the risk of a quench in the vicinity of the equatorial weld. However, the anisotropic mechanical properties of high–purity niobium tubes with large grains or the low ductility of small-grained tubes remain important limiting factors during forming.
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An... -
Stewart Bristow Leith08/10/2020, 10:00
Future particle accelerators require performance figures which push the boundaries of what is achievable with current SRF technologies. In this light, research has been completed into the creation of HiPIMS Nb thin films deposited onto copper as a means of achieving these performance figures.
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The results from the parametrical investigation into HiPIMS Nb thin films deposited onto copper... -
Ayse Özdem Sezgin (University of Siegen), Michael Vogel (University of Siegen), Xin Jiang (University of Siegen), Isabel Gonzales Diaz-Palacio (University of Hamburg), Robert Zierold (University of Hamburg), Stewart Bristow Leith (University of Siegen)08/10/2020, 11:00
While unbounded collective human mind continues to push beyond the boundaries in uncovering myriad mysteries of our universe, highly performing particle accelerators become indispensable tool to conduct successful experiments to shed light on such fundamental scientific inquires. On the path towards more efficient and sustainable particle accelerators, overcoming performance bottleneck of the...
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Mrs Alice Moros (Technische Universität Wien)08/10/2020, 11:30
The microstructural characterization represents an essential aspect for helping the enhancement of the material superconducting properties. Within the huge CERN project related to the realization of the FCC-hh, we focused on the microstructural analysis of superconducting materials envisioned as suitable candidates for some of its fundamental components: Nb3Sn for the bending...
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Dorothea Fonnesu (CERN)08/10/2020, 12:00
The FCC Study is an international collaboration established, in the search for physics beyond the Standard Model, to investigate the feasibility of a new circular collider having LHC as main injector. To this end, the development of ad-hoc SRF cavities represents a major challenge, for which superconducting (SC) film coated copper cavities are one of the pursuable solutions. Among the several...
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Dmitry Tikhonov (Helmholtz-Zentrum Berlin für Materialien und Energie)08/10/2020, 12:30
The niobium-coated copper cavities are interesting candidates for replacing bulk niobium cavities in future facilities (e.g. FCC). Such cavities, ideally, should overcome some accelerator design problems related to bulk Nb cavities. However, Nb/Cu films tend to show more extreme “Q-slope” effect, and have other disadvantages compared to bulk-Nb cavities, which currently limit their application...
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Michael Benedikt (CERN)08/10/2020, 14:30
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Lorena Vega Cid (Centro de Investigaciones Energéti cas Medioambientales y Tecno)08/10/2020, 15:00
This work will provide an insight into the CERN R&D programme on superconducting thin films. The aim is to find coating techniques and/or new materials with enhanced RF performance applicable to SRF cavities. The main lines of research at CERN consist of Nb on Cu technology, historically used in our accelerators, and A15 on Cu, to find new superconducting materials with potential application...
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Dr Pablo Vidal Garcia (CERN)08/10/2020, 15:30
In this work, an alternative method to compute the effect of losses on superconductors based on the Lossy Transmission Line Theory is introduced rigorously. In contrast to the application of the well-known perturbative methods at the dielectric-superconductor interface to obtain the equivalent surface currents, this new approach lies in analyzing the decaying propagative waves along the...
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Mrs Vanessa Garcia Diaz (INFN-LNL, Università degli Studi di Ferrara)08/10/2020, 16:30
One of the well-known difficulties concerning the performances of the Nb coated Cu cavities, is the reproducibility of the results. Two cavities fabricated by the same method and sputtered with the same deposition parameters, may present different performances during the RF characterization. Two main approaches are taken into consideration for this research: substrate and film reproducibility....
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Sofiya Savelyeva08/10/2020, 16:50
The proton-proton Future Circular Collider (FCC-hh) is a concept of the high energy accelerator being considered as a successor of the Large Hadron Collider. It is being designed to reach the centre-of-mass energy of 100 TeV in the ring with the circumference of 100 km, which is approximately 7 times higher than the energy of the Large Hadron Collider. To build this accelerator, the existing...
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Maxime Pierre Podeur08/10/2020, 17:10
To better understand the challenges and opportunities associated with the design and operation of radial compressors with light gases, a closed loop test facility has been designed, built and commissioned at the ITSM. The test facility has been developed to operate with air as well as with helium-neon gas mixtures of varying mixing ratios ranging from pure neon to pure helium.
The test...
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Paul Libeyre (ITER)09/10/2020, 09:00
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Ms Paola Mauceri (ASG Superconductors)09/10/2020, 09:30
The Magnesium Diboride (MgB2), is a material known since early 1950's, but, whose superconducting (SC) properties were defined in 2001, positioning this as a High-Temperature superconductor material (Tc= 39-40 K). The absence of weak-link and the simple crystalline structure allows to produce wires using the powder in tube (PIT) technique, allowing the industrial development and application....
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Johannes Gnilsen09/10/2020, 10:00
Several present and future-relevant technologies are based on high magnetic fields provided by the superior current carrying properties of high temperature superconductors (HTS) at low temperatures. Up to 600 m long YBCO coated conductors are commercially produced. Defects, material faults and magnetic fields suppress the critical current, Ic, and determine the maximum loss-free current...
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Lorenzo Ferrari Barusso (Unige - INFN)09/10/2020, 11:00
Transition edge sensors (TES) play a key role in current projects of future X-rays space
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telescopes as are foreseen as detectors for the focal plane instrument. In order to full exploit
their sensitivity in the space environment, they need an active cryogenic anticoincidence
detector (CryoAC) to reject the background due to cosmic charged particles. As signal given by
the interaction of... -
Andrea Traverso (Istituto Nazionale di Fisica Nucleare)09/10/2020, 11:30
The first step towards high critical currents in Bi-2212 wires was the comprehension that the supercurrent is blocked over long lengths by filament-diameter bubbles growing from the porosity of the powders during the partial melting phase. The Over Pressure (OP) process led to the realization of dense Bi-2212 wires with a $J_E$ performance far beyond the minimum application requirements, but...
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Mr Giovanni Succi (CERN)09/10/2020, 12:00
Current and temperature distribution and re-distribution phenomena in multi-strand superconducting cables are a topic of research since the beginning of this technology, and can be of major relevance for the operating margin and performance of accelerator magnets. My work at the MSC Group at CERN is based on the problem of current distribution in a Nb3Sn Rutherford cable subjected to a local...
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Aisha Saba09/10/2020, 12:30
The properties of thallium based superconductors are under exploration for the potential coating of the beam screen of the future circular collider (FCC). The FCC’s (100 km in circumference) study revolves around achieving 100 T-eV center-of-mass energy through the collision of beams (steered by 16 T magnetic field produced by superconducting magnets). One of the most important tasks is beam...
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