| Zugriffsnummer | 37178 |
| Dokumenttyp | Bericht |
| Sprache | Englisch |
| Titel | A new high voltage measurement system for the ESR Electron cooler |
| Autor(in); Institution |
Ullmann, Johannes; Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, GERMANY; Helmholtz Institute (HI), Jena, GERMANY
Geppert, Christopher; Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, GERMANY
Krämer, Jörg; Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, GERMANY
Meisner, Johann; 2.3, Elektrische Energiemesstechnik, PTB-Braunschweig
Sanchez, Rodolfo M.; GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GERMANY
Schmidt, Matthias; 2.3, Elektrische Energiemesstechnik, PTB-Braunschweig
Steck, Markus; GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GERMANY
Stöhlker, Thomas; Helmholtz Institute (HI), Jena, GERMANY; GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, GERMANY
Nörtershäuser, Wilfried; Technische Universität Darmstadt, Institut für Kernphysik, Darmstadt, GERMANY; Helmholtz Institute (HI), Jena, GERMANY
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| Quelle/Jahr | Annual Report 2015, Helmholtz Institute Jena:(2016), 59 - 59 |
| Herausgeber(in) |
Seipt, Daniel; Helmholtz Institute (HI), Jena, GERMANY
Günther, Marc M.; Helmholtz Institute (HI), Jena, GERMANY
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| URL | |
| Verlag | Jena: Helmholtz Institute |
| Freie Schlagworte | high voltage measurement ; ESR ; Electron cooler |
| Zusammenfassung | In storage rings like the ESR, ions are stored at relativistic velocities. Laser spectroscopy experiments like the LIBELLE1 experiment need to account for the large Doppler shift of the Laser wavelength in the laboratory frame to the co-moving frame of the ions. This requires a precise knowledge of the ions' velocity. The most precise method for such a velocity determination is a measurement of the electron cooler voltage [1]. A requirement for electron cooling to take place is a low relative velocity of ions and electrons. In thermal equilibrium of ion and electron beam, which is reached after few seconds of cooling time, the velocities of both beams can be assumed equal. The electrons’ velocity is mainly determined by the acceleration potential between the cathode in the electron gun and the grounded drift tubes wherein electrons and ions are superimposed. To obtain the true velocity of the ions, a correction of space charge effects in the electron beam needs to be performed via analytical [2] or experimental methods. |
