Contact
Advanced seminar, SS23
Physics with stored and cooled ions
Central Seminar Room
Usually every fortnight, Wednesday 15:00
Seminar program
| Date: | 19 Apr 2023 - 15:30 ! Hybrid Seminar ! Central Seminar Room and Zoom (Meeting ID: 696 9911 6953, Passcode: 256923) |
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| Speaker: | Prof. Dr. Jean-Philippe Karr, Université d'Evry-Val d'Essonne, France |
| Title: | Perspectives in hydrogen molecular ion spectroscopy |
Abstract
It was first suggested in 1976 that the spectroscopy of hydrogen molecular ions could be a promising method to improve the determination of the proton-electron mass ratio. This has been achieved in recent years as precisions in the few-ppt range were achieved both in experiment, using Doppler-free spectroscopy of sympathetically cooled HD+ ions in radiofrequency (Paul) traps, and in theory, using high-precision variational solutions of the three-body Schrödinger equation and systematic calculation of QED corrections in the nonrelativistic QED approach.Next-generation experiments will be performed on single molecular ions, either in RF traps, using quantum-logic spectroscopy, or in Penning traps, as investigated at the MPIK Heidelberg. Among other perspectives, they allow for improved measurements of the hyperfine splitting and of the bound electron's g-factor. After a general introduction, I will discuss the theoretical status and perspectives regarding these two quantities.
| Date: | 10 May 2023 - Hybrid Seminar ! Central Seminar Room and Zoom (Meeting-ID: 915 1204 2752, Kenncode: 758933) |
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| Speaker: | PD Dr. Sven Sturm, MPIK |
| Title: | Comparing positron and electron with the Lepton Symmetry Experiment (LSyM) |
| Date: | 25 May 2023 - Thursday ! Hybrid Seminar ! Central Seminar Room and Zoom (Meeting-ID: 915 1204 2752, Kenncode: 758933) |
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| Speaker: | Dr. Michele Sguazzin, LP2i Bordeaux |
| Title: | Study of surrogate reactions at heavy ion storage rings |
| Date: | 14 Jun 2023 - postponed ! |
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| Speaker: | Dr. Damian Müll, MPIK |
| Title: | Studies of the cooling behavior of isolated Al4- molecules in the CSR |
| Date: | 02 Aug 2023 - Hybrid Seminar ! Central Seminar Room and Zoom (Meeting-ID: 915 1204 2752, Kenncode: 758933) |
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| Speaker: | Caroline Rodenbeck, KIT, Karlsruhe |
| Title: | Determining the absolute energy scale of KATRIN |