A5018455239- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Spacecraft and Cryogenic Technologies
- Gyrotron and Vacuum Electronics Research
- Nuclear Physics and Applications
- Energy Harvesting in Wireless Networks
- Magnetic Properties of Alloys
- Physics of Superconductivity and Magnetism
- Magnetic confinement fusion research
- Advanced Power Generation Technologies
- Geophysics and Gravity Measurements
- Rocket and propulsion systems research
- Superconducting and THz Device Technology
- Particle Detector Development and Performance
- Combustion and Detonation Processes
- Catalytic Processes in Materials Science
- Advanced Combustion Engine Technologies
- Analytical Chemistry and Sensors
- Astro and Planetary Science
- Heat transfer and supercritical fluids
Uppsala University
2014-2024
In the framework of Future Circular Collider Study a new septum magnet concept ("SuShi") has been developed, and prototype was built at Wigner RCP, tested FREIA facility Uppsala University. The uses canted cosine theta (CCT)-like superconducting passive shield to create zero-field high-field region within its aperture. SuShi is first CCT with both winding layers simultaneously impregnated wax. Details construction will be presented, special emphasis on wax impregnation procedure which deals...
A horizontal cryostat to test superconducting cavities and magnets at liquid helium temperatures is installed FREIA (Facility for REsearch Instrumentation Accelerator de- velopment) Uppsala University, Sweden. The allows full testing of spoke elliptical accelerating without the need a specialized cry- omodulepercavity. Becausehorizontalcryostatsarecustom- built, their number in accelerator world very limited. one kind as it has been designed be versatile: able house either two ESS...
The FREIA laboratory is a Facility for REsearch Instrumentation and Accelerator Development at Uppsala University, Sweden, constructed recently to develop test accelerator components. Initially it will the RF system spoke cavities of ESS linac prototype nominal power. For this purpose we installed helium liquefaction plant soon recieve versatile horizontal cryostat two 352 MHz power stations, one based on tetrodes other solid state technology. Beyond these developments house neutron...
The FREIA Laboratory at Uppsala University, Sweden, has completed the evaluation of 13 double-spoke cavity cryomodules for ESS. This is first time cavities will be deployed in a real machine. paper summarizes testing procedures and statistics results lessons learned.
Uppsala University is constructing a large scale facility, called FREIA (Facility for Research Instrumentation and Accelerator Development). includes helium liquefier an accelerator test facility has the capacity to superconducting radio-frequency (RF) cavities with same RF system power level as in accelerator. A central element of horizontal cryostat connected closed loop liquefier. This can house two fully equipped (tuners, piezo, coupler, tank) perform full high tests operate at...
The FREIA Facility for Research Instrumentation and Accelerator Development at Uppsala University, Sweden, has reached the stage where testing of superconducting cavities European Spallation Source (ESS) is starting. new helium liquefaction plant been commissioned now supplies a custom-made, versatile horizontal cryostat, HNOSS, with liquid up to 140 l/h. cryostat designed built house two accelerating cavities, or, later on, other equipment such as magnets or crab cavities. A prototype...
Abstract In the framework of Future Circular Collider Study a new septum magnet concept, nicknamed ‘SuShi’ has been developed, and prototype was built at Wigner Research Center for Physics, tested FREIA facility Uppsala University in April 2023. The concept uses canted cosine theta (CCT)-like superconducting passive shield to create zero-field high-field region within its aperture. SuShi is first CCT with both winding layers simultaneously impregnated wax. This paper describes powering test...
As part of the development ESS spoke linac, FREIA Laboratory at Uppsala University, Sweden, hasbeen equipped with a superconducting cavity test facility. The cryogenic tests single ...
Abstract The FREIA Laboratory at Uppsala University focuses on superconducting technology and accelerator development. It actively supports the development of European Spallation Source, CERN, MAX IV, among others. has developed test facilities for such as a double-cavity horizontal cryostat, vertical cryostat with novel magnetic field compensation scheme, stand short cryomodules. Accelerating cavities have been tested in crab-cavities cryomodules ESS cryomodule stand. High power...
The dependence of cavity quality factor Q0 on acceler- ating gradient gives insight into the intrinsic limit RF surface impedance that determines performance. In this paper we propose a high-precision method measur- ing SRF cavities. A common way to study perfor- mance an is build oscillator around it referred as self-excited loop. standard approach, by tuning loop phase for maximum field level in and measuring forward reflected waves, one finds coupling. Then, performing time-decay mea-...
The European Spallation Source (ESS) is an accelerator-driven neutron spallation source built in Sweden. It will deliver the first protons to a rotating tungsten target by 2019 and reach full 5 MW average beam power following years. superconducting Spoke cavities are considered compact structures at low frequencies having excellent RF performance both medium velocity regimes, therefore ESS include total of 26 double-spoke cavities. testing prototype cavity high has been conceded Uppsala...
The Gersemi cryogenic test bench, installed at FREIA laboratory Uppsala University, was used for the first time in 2021 to power a superconducting magnet. As part of HL-LHC program, this cryostat offers an operating temperature between 4.2K and 1.9K. Its satellite equipment such as converters acquisition system allow two magnet coils be powered up 2 kA provide protection through robust quench detection energy extraction units. This report describes Gersemi's operational experiment safety...
A superconducting Double Spoke Resonator (DSR) is the technology of choice in a low energy section high power proton linear accelerator. At FREIA laboratory Uppsala University, we have tested two DSRs prototype cryomodule for European Spallation Source (ESS) project. It showed that conditioning process these cavity packages would be key series production tests. In this paper, present procedure developed, and also describe results with special focus on cross-contamination observed between...