ELFT HÍRADÓ

[Daniel Barna <barna.daniel AT wigner.mta.hu>]

*From:*Johannes Gutleber
*Sent:* 03 August 2017 10:57
*To:* fcc-study-members (Future Circular Colliders study members) 
<fcc-study-members AT cern.ch>
*Cc:* easitrain-office (EASITrain project and administrative matters 
office) <easitrain-office AT cern.ch>
*Subject:* EASITRAIN EU Project - open positions for 15 Early Stage 
Researchers

Dear FCC colleagues,

the *EASITRAIN* Horizon 2020 EU Marie Curie project will start on 
October 1, 2017.

There are 15 open positions for Early Stage Researchers for 3 years in 
the domains of

- superconducting wires

- superconducting thin films

- cryogenics for superconducting magnets

- cryogenic refrigeration systems

- high-speed forming

- business development of applications for superconductors and cryogenic 
refrigeration systems

A detailed *list of topics and employing organisations can be found 
here: http://easitrain.web.cern.ch/Vacancies.html*

*Please take note of the eligibility conditions:*

*- must have a university degree that grants access to a doctoral programme*

*- must not have a PhD degree at start of contract appointment*

*- less than 4 years of full-time research experience including training 
periods*

*- must not have resided or carried out their main activity (work, 
studies, etc.) in the country of the employing organisation for more 
than 12 months in the 3 years immediately prior to the reference date. *

*- applicants for CERN positions cannot have been at CERN for more than 
12 months in the 3 years immediately prior to the reference date. *

*- proficiency in English is required.*

*The hiring deadline is October 2, 2017!*

Please spread the news and if you know potential candidates, please ask 
them to directly

*get in contact with Emilie David from the EASITRAIN project office 
(easitrain.office AT cern.ch <mailto:easitrain.office AT cern.ch>).*

The summary of the open positions is included below for your convenience.

Wish you an excellent day.

Johannes Gutleber


   OPEN POSITIONS

------------------------------------------------------------------------

*Fellow*

        

*Host institution (Supervisor), Country*

        

*WP*

        

*PhD enrolment*

        

*Start date*

        

*Duration*

        

*Title*

ESR1

        

CERN (J. Bremer), Switzerland

        

2

        

Technical University Vienna, Austria

        

M6

        

36M

        

Cryogenic properties of Nb3Sn and NbN superconductors on substrate

*Objectives:* Experimentally qualify a method used by CERN and INFN-LNL 
to deposit layers and the reproducibility at required quality. To this 
end, de-velop a test station to characterise the superconducting 
material layer on the substrate and experimentally analyse the quality 
of the super-conducting layer performance under a wide temperature range 
from 300 K down to 4.2 K (e.g. measurement of RRR, critical temperature, 
magnetic penetration depth). Based on the data, develop a model and 
implement a numerical simulation to predict the influence of thermal 
properties such as heat capacity, heat conduction and heat transfer 
towards the substrate on the performance of the superconducting layer. 
Analyse the results with ESR14 (USIEGEN) and ESR10 (INFN-LNL).

ESR2

        

Bruker (A. Usoskin), Germany

        

2

        

Technical University Vienna, Austria

        

M6

        

36M

        

Assessment of high-performance superconducting wires at low temperatures

*Objectives:* Assess the effectiveness of current density improvement in 
superconducting wires at low temperatures (1.9 - 4.2 K) due to grain 
refinement and impurity doping aiming at Jc=1500 A/mm2 at 4.2 K and 16 
T. Identify mechanisms in the conductor manufacturing and pre-material 
properties to control the effects. To this end, design and produce wire 
samples, measure transport and RRR and analyse the results. Assess 
optimization potential by high-resolution scanning Hall probe microscopy 
and magnetic force microscopy that will reveal the distribution of 
magnetic flux to help quantifying the critical current density 
homogeneity within the superconducting sub-elements of multifilamentary 
wires. The objectives are attained in close collaboration with ESR1 
(CERN), ESR12 and ESR13 (TUW), both necessary and complementary 
characterisations.

ESR3

        

CEA (B. Baudouy), France

        

4

        

Université Paris Saclay, France

        

M6

        

36M

        

Cryogenic and thermal properties of superconducting magnet coils

*Objectives:* Model and experimentally validate the heat transfer in 
helium under different thermodynamic conditions (superfluid, 
supercritical, normal) in channels with hydraulic diameters from a few 
mm down to micrometers in steady state and transient conditions. Perform 
thermal measurements on actual insulated coils using the “stack” method 
developed by CEA-SACM in cooperation with CERN. Implement the numerical 
model and software tool to be able to predict the thermal behaviour of 
superconducting magnet coils. Cooperate with ESR4 at CEA-SBT on the 
integration of the tool with an overall cryogenic system modelling and 
simulation.

ESR4

        

CEA (F. Millet), France

        

4

        

Université Grenoble Alpes, France

        

M6

        

36M

        

Cooling architectures and cryogen distribution in superconducting magnets

*Objectives:* Develop an overview of different cooling architectures in 
cooperation with ESR3 at CEA Saclay and establish a library of reference 
components for all parts of the cryogenic cooling system including 
cryoplant and cryogen distribution to the devices (e.g. magnets, 
radiofrequency cavities, current leads). In cooperation with ESR3, 
establish an extensible efficien-cy model and develop a simulation tool 
for different architectures and cooling schemes and determine the 
cooling limits of selected design options. Integrate the potentials and 
constraints from TUD (ESR11) and USTUTT (ESR15). Based on the findings, 
optimise the process and model-based control for large-scale 
refrigeration and distribution applications.

ESR5

        

Vienna University of Economy (P. Keinz), Austria

        

4

        

Vienna University of Economy, Austria

        

M6

        

36M

        

Success factors for transfer of knowledge from science to market

*Objectives:* Evaluate state-of-the-art Collaborative Innovation 
Management methods and assess how these methods can be implemented to 
foster knowledge transfer and exchange in a high-tech environment. The 
focus lies on transferring technological competences devel-oped by 
organisations for fundamental research to commercially viable 
applications. Generate recommendations for the design and man-agement of 
collaborative innovation endeavours. Assess the potentials of the 
technologies in this ITN together with the industrial partners and 
develop a credible roadmap for the most promising technology 
advancements towards industrial and societal applications. The ESR 
visits all non-academic partners for the work.

ESR6

        

CNR-SPIN (E. Bellingeri), Italy

        

3

        

University of Genoa, Italy

        

M4

        

36M

        

Production of high temperature superconducting Thallium-based thin-film 
coatings

*Objectives:* Explore viable routes for the production of different 
phases of the Tl-1212 and Tl-1223 systems. To this end, prepare first 
poly-crystalline thick films from powder on various different substrates 
(e.g. silver) such as ink technique or electroplating and optimise the 
pro-duction towards the fabrication of coatings from the optimised 
precursors and plated substrate. Quantify and minimise Tl losses and 
improve super-conducting properties in an iterative process with TUW 
(ESR12 and ESR13) by performing oxygen and high-pressure treatment.

ESR7

        

COLUMBUS (G. Grasso), Italy

        

3

        

University of Genoa, Italy

        

M6

        

36M

        

Development of MgB2 wire for high-field magnet applications

*Objectives:* Develop a novel MgB2 wire, which is suitable for use in 
high field magnets at required current densities in fields above 10 
Tesla, operated at liquid helium temperature (~ 4 K), extending today’s 
state-of-the-art conductor only suitable for use in fields below 5 T. 
Assess the likelihood to extend operation up to 16 Tesla. Work in 
cooperation with TUW (ESR12, ESR13) to understand the key performance 
indicators determining the wire performances and optimise the production 
process.

ESR8

        

HZB (J. Knobloch), Germany

        

2

        

University Siegen, Germany

        

M6

        

36M

        

Radiofrequency properties of superconducting Nb3Sn and NbN thin films

*Objectives:* Determine the radiofrequency properties 
(high-radiofrequency surface resistance in the nΩ range, obtainable RF 
field gradient) of A15 and B1 compounds low-temperature superconductor 
thin films by measuring surface resistance of material samples at 
different tem-peratures (2.5 K and 4 K) at three different, fixed RF 
frequencies. Measure penetration depth of superconducting material into 
the sub-strate with at least two complementary methods. Consequently, 
analyse the production recipes (ESR14 USIEGEN, ESR1 CERN) and 
manu-facturing methods (ESR9 I-CUBE, ESR10 INFN-LNL) and examine impacts 
on to the measured radiofrequency property results. Identify the coating 
parameters impacting the RF performance most and establish a dependency 
model.

ESR9

        

I-CUBE (G. Avrillaud), France

        

3

        

CEMEF Mines Paris Tech, France

        

M7

        

36M

        

High velocity forming of superconducting structures with bulk Nb and Cu 
substrate

*Objectives:* Determine forming limits at high strain rates of 
high-velocity Electro-Hydraulic Forming (EHF) for Cu structures as 
substrate for superconducting coating and for bulk superconducting Nb. 
Develop a model for the impact of the method on the superconducting 
perfor-mances of the final product, in particular in terms of 
correlation with the microstructure (ESR12, TUW), RRR under cryogenic 
conditions (ESR1, CERN) and compare to alternative forming methods 
(ESR10, INFN-LNL). Due to the high strain operation lasting only for 
millisec-onds, analyse the mechanical properties after the process in 
the entire temperature range from 300 K to 4 K.

ESR10

        

INFN Legnaro National Laboratory (V. Palmieri), Italy

        

3

        

University Padova, Italy

        

M6

        

36M

        

Advanced surface coating techniques for superconducting radiofrequency 
cavities

*Objectives:* Develop a novel coating technique for A15 and B1 compounds 
based on high-rate ion coupled magnetron sputtering of Cu structures. 
Define and set up a test bench to assess the effectiveness of the 
manufacturing approach for radiofrequency performance at cryogenic 
operation temperature of 1.8 K. Measure complete, 6 GHz cavities with 
respect to their radiofrequency behaviour in cooperation with HZB 
(ESR8). Understand the role of film purity and the absence of defects 
versus the role of the thermal boundary resistance at the film/Cu 
substrate interface in cooperation with CERN (ESR1) by modulating the 
superconductor penetration into the Cu substrate and its influence on 
the Q-slope. Derive correlations of radiofrequency performances of 
thin-film cavities to the parameters of the sputtering process and the 
associated deposition conditions. Identify impacts of the forming 
process in cooperation with I-CUBE (ESR9).

ESR11

        

Technical University Dresden (C. Haberstroh), Germany

        

4

        

Technical University Dresden, Germany

        

M6

        

36M

        

Development and efficiency assessment of a reference Nelium 
refrigeration cycles

*Objectives:* Identify and describe a reference Neon-Helium (Nelium) 
mixture refrigeration cycle for a target temperature range of 20-70 K, 
indicating the Carnot efficiency for the refrigerator. Specify the 
suitable refrigerants and their composition. Based on the cycle 
speci-fications for different Nelium mixture ratios and overall magnet 
cooling requirements obtained from CERN and CEA (ESR4), develop a 
cooling system architecture and list suitable candidate components for 
the different configura-tions in view of building the system in 
co-operation with USTUTT (ESR15): turbo compressors, motors, 
turbo-expanders, heat exchangers and circulators. In the frame of a 
con-tract with an industrial supplier, specify and build a 
turbo-compressor test setup in cooperation with ESR15 in the 10-30 kW 
range with Nelium supply and gather data to understand limitations, 
derive scaling laws, estimate suitable unit sizes of refrigeration power 
and the associated required input power specifications. De-velop a cost 
model and estimate the costs for different cooling systems, depending on 
target temperature and cooling power.

ESR12

        

Technical University Vienna (J. Bernardi), Austria

        

2

        

Technical University Vienna, Austria

        

M6

        

36M

        

Microstructural characterisation of superconducting materials Nb3Sn, 
NbN, MgB2 and Tl-1223

*Objectives:* Measure the impact of manufacturing processes and ionizing 
radiation on the superconducting materials in wires (ESR2, ESR7, ESR13) 
and thin films (ESR6, ESR14). For this purpose, prepare the brittle 
samples using TEM lamella preparation by Focused Ion Beam as alternative 
to the classical methods (grinding, polishing, ion beam thinning). 
Characterise the microstructure by electron microscopy (SEM, TEM), 
analyse diffusion characteristics from filaments to metal matrix and 
investigate the chemical homogeneity across the filaments. For Tl-1223 
coatings, the development of texture by grain alignment will be a key 
observable.

ESR13

        

Technical University Vienna (M. Eisterer), Austria

        

2

        

Technical University Vienna, Austria

        

M6

        

36M

        

Characterisation of superconducting properties of Thallium-based 
coatings and MgB2 wires

*Objectives:* Understand in-depth the physics governing current 
transport in Tl-based coatings with ESR6 (CNR-SPIN) and in MgB2 wires 
with ESR7 (Columbus). Reveal correlations of superconducting properties 
with material features. Assess local properties (grain boundary 
transparency, presence of secondary phases and cracks, local texture) 
using scanning probe studies. Optimise large-area, high-resolution 
magnetic field mapping system to complement data from existing Scanning 
Hall Probe Microscopy by increasing scan range and spatial resolution. 
Perform transport measurements and SQUID magnetometry in high fields up 
to 15 Tesla, with the KHM method to allow for sepa-ration of inter- and 
intragranular currents. Examine micro- and nanostructure by SEM/TEM to 
facilitate correlation between material features and superconducting 
properties.

ESR14

        

University Siegen (X. Jiang), Germany

        

3

        

University Siegen, Germany

        

M4

        

36M

        

Production of superconducting Nb3Sn and NbN thin films

*Objectives:* Synthesise A15 and B1 (e.g. Nb3Sn, NbN) low-temperature 
superconducting thin film coatings on Cu substrates for radiofrequency 
characterization at HZB (ESR8). Select representative microstructural 
and electrical properties for subsequent quality assessment as function 
of substrate type (Al2O3 or Cu) and temperature; adjust film thickness 
and N2 flow rate. Analyse and optimise the synthesis process with 
respect to radiofrequency performance by correlating essential process 
parameters with the thin film structure and its characteristics.

ESR15

        

University Stuttgart (D. Vogt), Germany

        

4

        

University Stuttgart, Germany

        

M6

        

36M

        

Assessment and optimisation of efficient turbo compressors for light 
gases (Neon-Helium mixtures)

*Objectives:* Design a turbo compressor for the operation with light 
gases (Neon/Helium mixtures) and perform aerodynamic and structural 
analysis of the system. Study the thermodynamic cycles for large 
cryogenic loads and their impacts on the working medium and the impact 
on the machine induced by operation at low Mach numbers and the light 
gas in cooperation with TUD (ESR11). Quantify static and dynamic 
stresses, qualify different materials and propose design solutions that 
are suitable for operation with light gases. Give guidelines for the 
aerodynamic and mechanical design of the compressor and the 
manufacturing techniques to be applied.