|
1
|
Funkner S, Niehues G, Nasse MJ, Bründermann E, Caselle M, Kehrer B, Rota L, Schönfeldt P, Schuh M, Steffen B, Steinmann JL, Weber M, Müller AS. Revealing the dynamics of ultrarelativistic non-equilibrium many-electron systems with phase space tomography. Sci Rep 2023; 13:4618. [PMID: 36944670 PMCID: PMC10030633 DOI: 10.1038/s41598-023-31196-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 03/07/2023] [Indexed: 03/23/2023] Open
Abstract
The description of physical processes with many-particle systems is a key approach to the modeling of numerous physical systems. For example in storage rings, where ultrarelativistic particles are agglomerated in dense bunches, the modeling and measurement of their phase-space distribution is of paramount importance: at any time the phase-space distribution not only determines the complete space-time evolution but also provides fundamental performance characteristics for storage ring operation. Here, we demonstrate a non-destructive tomographic imaging technique for the 2D longitudinal phase-space distribution of ultrarelativistic electron bunches. For this purpose, we utilize a unique setup, which streams turn-by-turn near-field measurements of bunch profiles at MHz repetition rates. To demonstrate the feasibility of our method, we induce a non-equilibrium state and show that the phase-space distribution microstructuring as well as the phase-space distribution dynamics can be observed in great detail. Our approach offers a pathway to control ultrashort bunches and supports, as one example, the development of compact accelerators with low energy footprints.
Collapse
Affiliation(s)
- Stefan Funkner
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Gudrun Niehues
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michael J Nasse
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Erik Bründermann
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Michele Caselle
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Benjamin Kehrer
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Lorenzo Rota
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
- SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Patrik Schönfeldt
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
- DLR (Deutsches Zentrum für Luft und Raumfahrt) Institute of Networked Energy Systems, Carl-von-Ossietzky-Str.15, 26129, Oldenburg, Germany
| | - Marcel Schuh
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Bernd Steffen
- Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany
| | | | - Marc Weber
- Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | | |
Collapse
|
|
2
|
Abstract
Coherent synchrotron radiation from an electron storage ring is observed in the THz spectral range when the bunch length is shortened down to the sub-mm-range. With increasing stored current, the bunch becomes longitudinally unstable and modulates the THz emission in the time domain. These micro-instabilities are investigated at the electron storage ring BESSY II by means of cross-correlation of the THz fields from successive bunches. The investigations allow deriving the longitudinal length scale of the micro bunch fluctuations and show that it grows faster than the current-dependent bunch length. Our findings will help to set the limits for the possible time resolution for pump-probe experiments achieved with coherent THz synchrotron radiation from a storage ring.
Collapse
|