|
1.
|
|
|
2.
|
Flux Expulsion Lens: Concept and Measurements
/ Koettig, T (CERN) ; Turner, Daniel (CERN) ; Gallifa Terricabras, Adrià (CERN) ; González Díaz-Palacio, Isabel (U. Hamburg (main)) ; Hillert, Wolfgang (U. Hamburg (main)) ; Koettig, Torsten (U. Hamburg (main)) ; Macpherson, Alick (CERN) ; Rosaz, Guillaume (CERN) ; Stapley, Niall (CERN) ; Wenskat, Marc (U. Hamburg (main))
A magnetic flux expulsion lens (MFEL) has been designed and built at CERN. This device uses closed topology conduction cooling of samples to quantify magnetic flux expulsion of superconductors, and allows for systematic measurements of the cooling dynamics and the magnetic response during the superconducting transition. [...]
2023 - 6 p.
- Published in : JACoW SRF 2023 (2023) MOPMB003
Fulltext: PDF;
In : 21st International Conference on Radio-Frequency Superconductivity (SRF 2023), Grand Rapids, MI, United States, 22 - 30 Jun 2023, pp.MOPMB003
|
|
|
3.
|
Effect of Irradiation Temperature and Atmosphere on Aging of Epoxy Resins for Superconducting Magnets
/ Parragh, David Mate (CERN) ; Scheuerlein, Christian (CERN) ; Martin, Noémie (Lyon U.) ; Piccin, Roland (CERN) ; Ravotti, Federico (CERN) ; Pezzullo, Giuseppe (CERN) ; Koettig, Torsten (CERN) ; Lellinger, Dirk (Unlisted, DE)
The superconducting magnets of future particle accelerators will be exposed to high
irradiation doses at cryogenic temperatures. To investigate the effect of irradiation temperature
and atmosphere on the aging behavior, we have characterized the changes in thermomechanical
properties of six epoxy resins for potential use in superconducting magnets after irradiation up to
20 MGy in ambient air, inert gas, and liquid helium. [...]
2024 - 15 p.
- Published in : MDPI Polymers 16 (2024) 407
Fulltext: PDF;
|
|
|
4.
|
|
|
5.
|
CERN Based $T_{c}$ Measurement Station for Thin-Film Coated Copper Samples and Results on Related Studies
/ Fonnesu, Dorothea (CERN ; Siegen U.) ; Bremer, Johan (CERN) ; Koettig, Torsten (CERN) ; Laín-Amador, Lucia (CERN) ; Pereira Carlos, Carlota (CERN) ; Rosaz, Guillaume (CERN) ; Vaaranta, Antti (Helsinki U.)
In the framework of the Future Circular Collider (FCC) Study, the development of thin-film coated superconducting radio-frequency (SRF) cavities capable of providing higher accelerating fields (10 to 20 MV/m against 5 MV/m of LHC) represents a major challenge. The development of a test stand commissioned at CERN for the inductive measurement of the critical temperature (T$_{c}$c) of SC thin-film deposited on copper samples for SRF application is presented in this work. [...]
2022 - 4 p.
- Published in : JACoW SRF 2021 (2022) 105-108
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.105-108
|
|
|
6.
|
NA62 Liquid Krypton Purity Monitor
/ Bremer, Johan (CERN) ; Bryman, Douglas (British Columbia U. ; TRIUMF) ; Danielsson, Hans (CERN) ; Falaleev, Valeri (Dubna, JINR ; INFN, Perugia) ; Koettig, Torsten (CERN) ; Kurchaninov, Leonid (TRIUMF) ; Liberadzka-Porret, Joanna (CERN) ; Onufrena, Aleksandra (CERN) ; Velghe, Bob (TRIUMF)
A system for determining the purity of liquid krypton employed in the NA62 rare kaon decay experiment at CERN was developed based on the use of a time projection chamber. The attenuation of drifting ionization electrons from absorption of 511 keV gamma rays in liquid krypton was measured to estimate the purity. [...]
arXiv:2210.16232.-
2023-10-10 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1057 (2023) 168764
Fulltext: 2210.16232 - PDF; Publication - PDF;
|
|
|
7.
|
Versatile Beamline Cryostat for the Cryogenic Current Comparator (CCC) for FAIR
/ Haider, David (Darmstadt, GSI) ; De Gersem, Herbert (Darmstadt, Tech. U.) ; Golm, Jessica (Jena U. ; CERN) ; Koettig, Torsten (CERN) ; Kurian, Febin (Darmstadt, GSI) ; Marsic, Nicolas (Darmstadt, Tech. U.) ; Müller, Wolfgang (Darmstadt, Tech. U.) ; Schmelz, Matthias ; Schwickert, Marcus (Darmstadt, GSI) ; Sieber, Thomas (Darmstadt, GSI) et al.
The Cryogenic Current Comparator (CCC) extends the measurement range of traditional non-destructive current monitors used in accelerator beamlines down to a few nano-amperes of direct beam current. This is achieved by a cryogenic environment of liquid helium around the beamline, in which the beam’s magnetic field is measured with a Superconducting Quantum Interference Device (SQUID), which is itself enclosed in a superconducting shielding structure. [...]
2019 - 4 p.
- Published in : 10.18429/JACoW-IBIC2019-MOPP007
Fulltext: PDF;
In : 8th International Beam Instrumentation Conference (IBIC 2019), Malmo, Sweden, 8 - 12 Sep 2019, pp.MOPP007
|
|
|
8.
|
Conceptual Design of the Cryostat for a Highly Radiation Transparent 2 T Superconducting Detector Solenoid for FCC-ee+
/ Ilardi, Veronica (CERN ; Twente U., Enschede) ; Dudarev, Alexey (CERN) ; Silva, Helder (CERN) ; Koettig, Torsten (CERN) ; Busch, Lennard N (CERN ; KIT, Karlsruhe) ; Borges de Sousa, Patricia (CERN) ; Ten Kate, Herman H. J. (CERN)
The Future Circular Collider electron-positron version (FCC-ee$^{+}$) may be the next step towards a next generation of particle colliders. It may include an Experiment for probing ee$^{+}$ collisions using the IDEA (International Detector for Electron-positron Accelerator), or a similar detector, requiring a solenoid enclosing the inner tracking detector. [...]
2020 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 30 (2020) 4500405
|
|
|
9.
|
Thermal Mapping of SRF Cavities by Second Sound Detection With Transition Edge Sensors and Oscillating Superleak Transducers
/ Vandoni, Giovanna (CERN) ; Furci, Hernan (Ecole Polytechnique, Lausanne) ; Koettig, Torsten (CERN) ; Macpherson, Alick (CERN) ; Turaj, Katarzyna (CERN) ; Vega Cid, Lorena (CERN)
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 Nb crab cavities for HiLumi or 704 MHz 5-cell high-gradient cavities. [...]
SRF2019.-
2019 - 5 p.
- Published in : (2019) , pp. 1184-1188
Fulltext: PDF;
In : 19th International Conference on RF Superconductivity, Dresden, Germany, 30 Jun - 05 Jul 2019, pp.1184-1188
|
|
|
10.
|
Characterisation of the radiation hardness of cryogenic bypass diodes for the HL-LHC inner triplet quadrupole circuit
/ Wollmann, Daniel (CERN) ; Bernhard, Axel (KIT, Karlsruhe) ; Cangialosi, Chiara (CERN) ; Cerutti, Francesco (CERN) ; D'Angelo, Giorgio (CERN) ; Danzeca, Salvatore (CERN) ; Denz, Reiner (CERN) ; Favre, Mathieu (CERN) ; Garcia Alia, Ruben (CERN) ; Hagedorn, Dietrich (CERN) et al.
The powering layout of the new HL-LHC Nb$_3$Sn triplet circuits is the use of cryogenic bypass diodes, where the diodes are located inside an extension to the magnet cryostat, operated in superfluid helium and exposed to radiation. Therefore, the radiation hardness of different type of bypass diodes has been tested at low temperatures in CERN’s CHARM irradiation facility during the operational year 2018. [...]
CERN-ACC-2019-265.-
2019 - 4 p.
- Published in : 10.18429/JACoW-IPAC2019-THPTS067
Fulltext from publisher: PDF;
In : 10th International Particle Accelerator Conference, Melbourne, Australia, 19 - 24 May 2019, pp.THPTS067
|
|