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Cryogenic electrostatic Trap for Fast Ion Beams (CTF)
The CTF was developed by the Stored and Cooled Ions Division of the MPI für Kernphysik to test the technology and techniques necessary to construct the Cryogenic Storage Ring (CSR), and to work as an experimental device in molecular and cluster physics. Whereas in the CSR the stored ion beam will be kept on a closed orbit by electrostatic deflectors, in the CTF the beam is reflected back and forth between two electrostatic mirrors, while being focused laterally by electrostatic lenses. In both devices, the electrodes and the vacuum chambers they are housed in will be cooled to temperatures between 2-10 K. These cold surroundings with their low thermal radiation background allow the initially hot molecular ions to cool to their rovibrational ground state by emission of infrared photons. Additionally, the pressure of the residual gas (mainly hydrogen) ir greatly reduced by cryosorption of the residual hydrogen gas on the surfaces of the cryogenic beam pipe.
Recent Developments
- Dec 2011: We are re-activating our laser system, which will allow more precise control over the ion excitation in the next experiments.
- Oct 2011: We have moved the CTF to vacate room for an RF-pre-trap which is currently being designed.
- June 2011: We have measured the decay law for electron emission from highly excited SF6- molecular anions.
- Feb 2011: We are currently investigating the electron emision from sulfur hexafluoride anions in the cold trap
Earlier news items
Further Information
- People / Contact
- Publications related to the CTF
- Archive of previous CTF News items
- Links
- Media
- Test
