A Non-Destructive Beam Monitoring System Based on an LTS-SQUID
| Autor: | Hansjörg Reeg, Paul Seidel, R. Geithner, Marcus Schwickert, R. Neubert, W. Vodel, R. von Hahn |
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| Rok vydání: | 2011 |
| Předmět: |
Physics
Frequency response business.industry Detector Particle accelerator Condensed Matter Physics Electronic Optical and Magnetic Materials Cryogenic current comparator Magnetic field law.invention SQUID Nuclear magnetic resonance Optics law Electromagnetic coil Physics::Accelerator Physics Electrical and Electronic Engineering business Beam (structure) |
| Zdroj: | IEEE Transactions on Applied Superconductivity. 21:444-447 |
| ISSN: | 1558-2515 1051-8223 |
| Popis: | Monitoring of beam currents in particle accelerators without affecting the beam guiding elements, interrupting the beam or influencing its profile is a major challenge in accelerator technology. A solution to this problem is the detection of the magnetic field generated by the moving charged particles. We present a non-destructive beam monitoring system for particle beams in accelerators based on the Cryogenic Current Comparator (CCC) principle. The CCC consists of a high-performance low-temperature DC superconducting quantum interference device (LTS DC-SQUID) system, a toroidal pick-up coil, and a meander-shaped superconducting niobium shield. This device allows the measurement of continuous as well as pulsed beam currents in the nA-range. The resolution and the frequency response of the detector strongly depend on the toroidal pick-up coil and its embedded ferromagnetic core. Investigations of both the temperature and frequency dependence of the relative permeability and the noise contribution of several nanocrystalline ferromagnetic core materials are crucial to optimize the CCC with respect to an improved signal-to-noise ratio and extended transfer bandwidth. |
| Databáze: | OpenAIRE |
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