Date/time: Monday 22nd July, 13:00-17:00
ICEC Course 1:
Cryostats for accelerator superconducting devices
Room: Plénière B
Time: 13:00-14:45
Teacher: Vittorio Parma, CERN SY-RF/SRF Section.
Email: vittorio.parma@cern.ch
Vittorio is a senior engineer and applied physicist with more than 25 years of experience at CERN. He has worked on the cryostats of the LHC superconducting magnets covering the entire project from preliminary design to industrial construction, installation, and commissioning of the LHC machine. He has led for more than 15 years the unit in charge of Cryostats at CERN. Vittorio has also led the development of cryomodules for accelerators SRF applications, including those of HIE Isolde and the prototype for the Superconducting Proton Linac (SPL).
He is now in charge of the development of the cryomodules for the SRF system of the electron-positron Future Circular Collider (FCCee). Vittorio regularly gives lectures and training courses on cryogenic engineering and cryostat design at CERN and in other laboratories.
Abstract:
This course gives an overview of the requirements for cryostats for accelerator superconducting devices and the specificities for superconducting magnets and superconducting cavities. It includes understanding operational and cryogenic safety aspects. Several design solutions and choice of materials from past and present accelerators will be covered. Ongoing trends for future large accelerators and smaller applications will be illustrated.
ICEC Course 2:
Cryocooler based cooling options, from principles to performance to system integration
Room: Plénière B
Time: 15:15-17:00
Teacher: Torsten Koettig, CERN TE/CRG-CL Section.
Email: torsten.koettig@cern.ch
Torsten is an engineer and applied physicist specialized in low temperature research and development He has gained more than 20 years of experience in cryogenics, consulting and advising in European and American research laboratories including project representation in international collaborations.
His educational background of a major of supply engineering with focus on air conditioning and clean room heat exchanger systems provided a profound basis of the additional study of physics and the first contact with cryogenics in his master thesis by designing and building high cooling power coaxial pulse tube refrigerators. The main component of a pulse tube refrigerator, the regenerator material and structure, got his attention for the PhD topic with thin film coatings and integration of cooling options in non-metallic cryostats. Following his PhD, Torsten received a Fellowship at CERNs Central Cryogenic Laboratory (Cryolab) where he stayed 3 years working on mini-channel two-phase flow cooling and heat transfer studies at ultra-low temperature interfaces.
Stages of his professional career were as research scientist/engineer at Lawrence Berkely National Laboratory studying upgrades of test infrastructure for Nb3Sn magnet developments and cooling strategies for the planned Next Generation Light Source (LINAC cavity cooling). This field of large-scale cryogenics was pursued by Torsten as cryogenic engineer at ESS Sweden for cavity cooling and cryomodule testing infrastructures.
From 2013 onwards, Torsten is the responsible scientist for the CERN Cryolab, working on various R&D topics for accelerator magnets and cavity cooling as well as detector upgrades and small test stands. Especially novel cooling strategies are actively researched by Torsten together with the guided team of young engineers and scientists.
Abstract:
The course will give a brief introduction to the cryocooler principles and its main components, which is required to understand the interaction of the cooling source with the cooling object in question. The course will be organized in 2 parts. The first part will cover a recap of the cryocooler principle for JT, Stirling, GM and Pulse tube. Cryocooler components and their performance influence will be covered, as well as cooling power vs. interface temperatures and staging. A comparison of application fields to cryocooler cooling technologies will be illustrated with application examples from 80 K down to milli Kelvin. Limitations of cryocooler applications (mechanical vibrations, temperature oscillation electromagnetic interaction and instabilities) will conclude this part. The second part will be dedicated to novel concepts of cooling links, covering free fluid circulation loops (gravity assisted), and He forced flow circuits. Components like high-effectiveness counter-flow HEXs, and circulators will be illustrated. Ways of boosting the cooling power of cryocoolers vs. physical separation to cooling interface will be explained. An overall comparison between He refrigerators and cryocoolers will conclude this course, completed with general advice and references.
ICMC Course 1:
Materials selection for cryogenic applications
Room: Plénière C
Time: 13:00-14:45
Teacher: Ignacio Aviles Santillana
Email: ignacio.aviles.santillana@cern.ch
Ignacio is materials engineer with a strong focus on cryogenic materials. With more than 13 years of experience at CERN’s materials, metrology, and NDT section, currently holds the position of Lead Engineer for the ITER – CERN collaboration. In this leadership capacity, Ignacio oversees studies related to materials and components, managing everything from materials selection and procurement to fabrication and assembly qualifications both for CERN and ITER components. During his PhD studies, Ignacio made significant contributions to the study on fracture toughness at cryogenic temperatures of austenitic stainless steel, and initiated collaborations with reference laboratories in the field such as KIT, TIPC and NHMFL. He has also been active in the SRF community in the fabrication of superconducting cavities of SPL, HIE-ISOLDE and more recently, HL-LHC crab cavities. Ignacio gives lectures on materials for particle accelerators for the CERN Accelerator School and for other research institutes such as PSI.
Abstract:
This course offers participants a comprehensive exploration of materials specifically designed for cryogenic applications. With a focus on understanding the unique properties and characteristics of materials at extreme low temperatures, attendees will delve into the essential criteria and considerations for selecting the most appropriate materials. By examining the behavior and performance of these materials in cryogenic environments, participants will gain invaluable insights and knowledge, allowing them to make informed decisions to ensure optimal performance, durability, and safety in various cryogenic applications.
ICMC Course 2:
Cryogenic Materials & Magnet Technology for High Energy Physics Detectors
Room: Plénière C
Time: 15:15-17:00
Teacher: Prof. dr. ir. Herman H.J. ten Kate, University of Twente, Enschede, The Netherlands.
Email: h.h.j.tenkate@utwente.nl
Webpage: https://www.utwente.nl/en/tnw/ems/
Herman ten Kate is emeritus professor at the University of Twente where he was educated and started his carrier in 1980; since 1997 occupying the Chair of Industrial Application of Superconductivity. In addition, he worked at CERN from 1996 until his retirement in April 2020 as Magnet System Project Leader for the ATLAS Experiment, comprising the world’s largest operational superconducting magnet of a solenoid and three huge toroids. With his team he also supported other detector magnet developments for the Future Circular Collider, linear colliders as CLIC/ILC, antimatter detector PANDA, neutrino detector BabyMIND and solar axions detector IAXO. After retirement he continued his work for guiding PhD students, magnet review committees, and supporting R&D projects with industries and institutes around the globe.
Abstract:
This course covers the design and construction of superconducting magnets for particle detectors, in particular those for the LHC and future FCC particle colliders. The lecture is intended for physicists and engineers working in the areas of structural and functional cryogenics materials as well as superconductor properties meant to be used in magnet technology. Addressed are basic principles, physical parameters, as well as tools used for superconducting magnet design. The course will start by presenting the properties and characteristics of superconducting wires and cables as well as structural cryogenic materials. The main concepts related to electro-magnetic and structural detector magnet design as well as cooling techniques will be outlined. The lecture deals with the mechanics and fabrication techniques of a superconducting detector magnet, focusing on coils and the structural components aimed at containing the electro-magnetic forces and managing the stress.