Conceptual Design of the Cryostat for a Highly Radiation Transparent 2 T Superconducting Detector Solenoid for FCC-ee+
Autor: | T. Koettig, Patricia Borges de Sousa, H. Silva, Lennard N. Busch, Herman H.J. ten Kate, Veronica Ilardi, Alexey Dudarev |
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Přispěvatelé: | Energy, Materials and Systems |
Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
Cryostat
Materials science Physics::Instrumentation and Detectors Solenoid Superconducting magnet 01 natural sciences Radiation length Optics Thermal conductivity 0103 physical sciences Insulation testing Electrical and Electronic Engineering 010306 general physics Aerogel Large Hadron Collider Calorimeter (particle physics) business.industry Detector Condensed Matter Physics n/a OA procedure Electronic Optical and Magnetic Materials Physics::Accelerator Physics business |
Zdroj: | IEEE transactions on applied superconductivity, 30(4):8998405. IEEE |
ISSN: | 1051-8223 |
Popis: | 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. An innovative 2 T superconducting solenoid with 4 m bore and 6 m long has been accepted as baseline. Positioning the solenoid in between tracker and calorimeter requires an ultra-thin and highly radiation transparent cold mass. Likewise, a thin and radiation transparent cryostat is needed. The set value for the solenoid's maximum radiation length is 1 × X0. The cryostat is designed as a sandwich of thin Aluminum alloy inner and outer shells, eventually locally reinforced, for achieving vacuum tightness, and layers of innovative insulation material providing lowest thermal conductivity and sufficient mechanical resistance. Cryogel Z, a composite blanket of silica aerogel and reinforcing fibers, has a density of 160 kg/m3 and would allow a 250 mm cryostat thickness. As an alternative, glass spheres (e.g., K1 type, manufactured by 3M, with a $\text{65}\,\mu \text{m}$ diameter and a 125 kg/m3 density), or similar material, can be dispersed between the vacuum vessel thin-walls providing structural support. Besides the cryostat conceptual design, we outline the setup developed at CERN to represent the real-case cryostat and to measure the heat load transferred through the above-mentioned materials and we present the test results for Cryogel Z. |
Databáze: | OpenAIRE |
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