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 8 November 2018 (07:30) to Friday 9 November 2018 (17:00)

Monday 5 November 2018
Tuesday 6 November 2018
Wednesday 7 November 2018
Thursday 8 November 2018
08:15
08:15 - 09:00
Contributions

08:15 Registration

08:45 Welcome & logistics - Frank Gerigk (CERN)
09:00 Part 1
Part 1
09:00 - 10:15
Room: 31/3-004 - IT Amphitheatre
Contributions

09:00 Measurement of magnetic shielding performance and permeability of soft magnetic alloys for SRF - Sakakibara (Othama CO)

09:25 Small magnetic field measurements and control at CERN - Marco Buzio (CERN)

09:50 Magnetic field management in cryomodules and vertical cryostats at CEA-Saclay - Juliette Plouin (CEA)
10:15 Coffee Break
Coffee Break
10:15 - 10:30
Room: 31/3-004 - IT Amphitheatre
10:30 Part 2
Part 2
10:30 - 11:25
Room: 31/3-004 - IT Amphitheatre
Contributions

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

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

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

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

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

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

12:20 Discussion
12:30 Lunch
Lunch
12:30 - 14:00
14:00 Part 2
Part 2
14:00 - 15:50
Room: 31/3-004 - IT Amphitheatre
Contributions

14:00 Microscopic investigation of flux expulsion at FNAL - Martina Martinello (Fermilab - IIT)

14:10 Study on temperature dependent EBSD measurements - Kensei Umemori (KEK)

14:20 Update on Experimental Study of Flux Expulsion and Cold Work - Sam Posen (Fermilab)

14:30 Discussion on the impact of material on expulsion efficiency

14:40 Flux epulsion experiments with a 704 MHz elliptical cavity - Anton Evgeniev Ivanov (CERN)

14:50 Flux expulsion experiments with QWR at RIKEN - Kensei Umemori (KEK)

15:00 Discussion on non 1.3 GHz experiments

15:10 LCLS-II Cryomodule expulsion - Sam Posen (Fermilab)

15:20 LCLS-II TD material batch study on flux expulsion - Ari Palczewski (Thomas Jefferson National Accelerator Facility)

15:30 Status of flux trapping related activities at DESY - Detlef Reschke (DESY) Joern Schaffran (Deutsches Elektronen-Synchrotron (DE)) Marc Wenskat (Deutsches Elektronen-Synchrotron DESY)

15:40 Discussion on 1.3 GHz experiments
15:50 Coffee Break
Coffee Break
15:50 - 16:10
Room: 31/3-004 - IT Amphitheatre
16:10 Part 3
Part 3
16:10 - 18:00
Room: 31/3-004 - IT Amphitheatre
Contributions

16:10 Angular dependency of flux expulsion - Felix Kramer (HZB)

16:20 How is trapped flux affected by the cavity geometry - David Longuevergne (IPNO)

16:30 Discussion on geometrical aspects

16:40 Pinning studies for SC magnets and insights for SRF - Damian Hampshire (Durham University)

17:05 General discussion on possible future experiments
18:00 Workshop Dinner
Workshop Dinner
18:00 - 21:00
Friday 9 November 2018
09:00 Part 1
Part 1
09:00 - 10:30
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

09:00 Introduction to the session - Akira Miyazaki (University of Manchester (GB))

09:03 Trapped flux sensitivity studies as a function of: treatment, RF field and frequency - Martina Martinello (Fermilab - IIT)

09:20 Overview of flux trapping at Cornell - James Maniscalco (Cornell University)

09:37 Sensitivity to trapped flux in high-purity large-grain niobium based on cavity measurements - Rongli Geng (Jefferson Lab)

09:54 Flux trapping investigation in superconducting samples via the quadrupole resonator - Marco Arzeo (CERN)

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

10:18 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 Coffee Break
Coffee Break
10:30 - 11:00
Room: 30/7-018 - Kjell Johnsen Auditorium
11:00 Part 2
Part 2
11:00 - 12:30
Room: 30/7-018 - Kjell Johnsen Auditorium
Contributions

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

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

11:42 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 Vortex dynamics and hysteretic flux losses due to pinning - Danilo Liarte (Cornell University)

12:16 Discussion
12:30 Lunch
Lunch
12:30 - 14:00
14:00
14:00 - 15:00
Room: 31/3-004 - IT Amphitheatre
Contributions

14:00 Wrap-up : Magnetic shielding - Mika Masuzawa (KEK) Saravan Chandrasekaran (FNAL)

14:20 Wrap up: expulsion efficiency - David Longuevergne (IPNO) Julia Koeszegi (HZB) Kensei Umemori (KEK)

14:40 Wrap-up :sensitivity to trapped flux - Akira Miyazaki (University of Manchester (GB)) Mattia Checchin (FNAL)
15:00

15:00 - 16:30