Name: TTC/ARIES topical workshop on flux trapping and magnetic shielding
Start: 2018-11-08T07:30:00+01:00
End: 2018-11-09T17:00:00+01:00
Location: CERN

TTC/ARIES topical workshop on flux trapping and magnetic shielding

from Thursday, November 8, 2018 (7:30 AM) to Friday, November 9, 2018 (5:00 PM)

Monday, November 5, 2018
Tuesday, November 6, 2018
Wednesday, November 7, 2018
Thursday, November 8, 2018
8:15 AM
8:15 AM - 9:00 AM
Contributions

8:15 AM Registration

8:45 AM Welcome & logistics - Frank Gerigk (CERN)
9:00 AM Part 1
Part 1
9:00 AM - 10:15 AM
Room: 31/3-004 - IT Amphitheatre
Contributions

9:00 AM Measurement of magnetic shielding performance and permeability of soft magnetic alloys for SRF - Sakakibara (Othama CO)

9:25 AM Small magnetic field measurements and control at CERN - Marco Buzio (CERN)

9:50 AM Magnetic field management in cryomodules and vertical cryostats at CEA-Saclay - Juliette Plouin (CEA)
10:15 AM Coffee Break
Coffee Break
10:15 AM - 10:30 AM
Room: 31/3-004 - IT Amphitheatre
10:30 AM Part 2
Part 2
10:30 AM - 11:25 AM
Room: 31/3-004 - IT Amphitheatre
Contributions

10:30 AM Magnetic field management for SRF - Saravan Chandrasekaran (FNAL)

11:05 AM Characterisation of the magnetic shield efficiency for the ESS double spoke cavities - Vateanui Sansine (Institut de Physique nucléaire d'orsay)

11:20 AM Q&A on Magnetic shielding
11:25 AM Part 1
Part 1
11:25 AM - 12:30 PM
Room: 31/3-004 - IT Amphitheatre
Contributions

11:25 AM Review of magnetic flux expulsion - Sam Posen (Fermilab)

11:50 AM Can the present techniques for cavity flux expulsion efficiency measurements be unified? - Rongli Geng (Jefferson Lab) Shichun Huang (IMP)

12:05 PM Efficiency measurements with MO, AMR, and Fluxgates - Julia-Marie Köszegi (HZB)

12:20 PM Discussion
12:30 PM Lunch
Lunch
12:30 PM - 2:00 PM
2:00 PM Part 2
Part 2
2:00 PM - 3:50 PM
Room: 31/3-004 - IT Amphitheatre
Contributions

2:00 PM Microscopic investigation of flux expulsion at FNAL - Martina Martinello (Fermilab - IIT)

2:10 PM Study on temperature dependent EBSD measurements - Kensei Umemori (KEK)

2:20 PM Update on Experimental Study of Flux Expulsion and Cold Work - Sam Posen (Fermilab)

2:30 PM Discussion on the impact of material on expulsion efficiency

2:40 PM Flux epulsion experiments with a 704 MHz elliptical cavity - Anton Evgeniev Ivanov (CERN)

2:50 PM Flux expulsion experiments with QWR at RIKEN - Kensei Umemori (KEK)

3:00 PM Discussion on non 1.3 GHz experiments

3:10 PM LCLS-II Cryomodule expulsion - Sam Posen (Fermilab)

3:20 PM LCLS-II TD material batch study on flux expulsion - Ari Palczewski (Thomas Jefferson National Accelerator Facility)

3:30 PM Status of flux trapping related activities at DESY - Detlef Reschke (DESY) Joern Schaffran (Deutsches Elektronen-Synchrotron (DE)) Marc Wenskat (Deutsches Elektronen-Synchrotron DESY)

3:40 PM Discussion on 1.3 GHz experiments
3:50 PM Coffee Break
Coffee Break
3:50 PM - 4:10 PM
Room: 31/3-004 - IT Amphitheatre
4:10 PM Part 3
Part 3
4:10 PM - 6:00 PM
Room: 31/3-004 - IT Amphitheatre
Contributions

4:10 PM Angular dependency of flux expulsion - Felix Kramer (HZB)

4:20 PM How is trapped flux affected by the cavity geometry - David Longuevergne (IPNO)

4:30 PM Discussion on geometrical aspects

4:40 PM Pinning studies for SC magnets and insights for SRF - Damian Hampshire (Durham University)

5:05 PM General discussion on possible future experiments
6:00 PM Workshop Dinner
Workshop Dinner
6:00 PM - 9:00 PM
Friday, November 9, 2018
9:00 AM Part 1
Part 1
9:00 AM - 10:30 AM
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

9:00 AM Introduction to the session - Akira Miyazaki (University of Manchester (GB))

9:03 AM Trapped flux sensitivity studies as a function of: treatment, RF field and frequency - Martina Martinello (Fermilab - IIT)

9:20 AM Overview of flux trapping at Cornell - James Maniscalco (Cornell University)

9:37 AM Sensitivity to trapped flux in high-purity large-grain niobium based on cavity measurements - Rongli Geng (Jefferson Lab)

9:54 AM Flux trapping investigation in superconducting samples via the quadrupole resonator - Marco Arzeo (CERN)

10:11 AM Reports on sensitivity measurements at KEK - Kensei Umemori (KEK)

10:18 AM Optimization of High Temperature N2 Doping for Minimization of Sensitivity to Trapped Flux and Maximization of Quench Fields - Daniel Bafia (Fermi National Accelerator Laboratory)
10:30 AM Coffee Break
Coffee Break
10:30 AM - 11:00 AM
Room: 30/7-018 - Kjell Johnsen Auditorium
11:00 AM Part 2
Part 2
11:00 AM - 12:30 PM
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

11:00 AM Dissipation caused by oscillating vortices in the SRF cavities - Alexander Gurevich (Old Dominion University)

11:25 AM Trapped flux sensitivity in the low amplitude radio-frequency regime - Mattia Checchin (FNAL)

11:42 AM A simple model for the RF field dependence of the trapped flux sensitivity based on a non-linear pinning force - Ruggero Vaglio (1950)

11:59 AM Vortex dynamics and hysteretic flux losses due to pinning - Danilo Liarte (Cornell University)

12:16 PM Discussion
12:30 PM Lunch
Lunch
12:30 PM - 2:00 PM
2:00 PM
2:00 PM - 3:00 PM
Room: 31/3-004 - IT Amphitheatre
Contributions

2:00 PM Wrap-up : Magnetic shielding - Mika Masuzawa (KEK) Saravan Chandrasekaran (FNAL)

2:20 PM Wrap up: expulsion efficiency - David Longuevergne (IPNO) Julia Koeszegi (HZB) Kensei Umemori (KEK)

2:40 PM Wrap-up :sensitivity to trapped flux - Akira Miyazaki (University of Manchester (GB)) Mattia Checchin (FNAL)
3:00 PM

3:00 PM - 4:30 PM

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