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Next GoLP VIP Seminar by Patric Muggli

On Thursday, 16th of February at 11:30 am, there will be a GoLP VIP Seminar by Patric Muggli (Max Planck Insitute for Physics, Munich, Germany). The event will take place at Anfiteatro Abreu Faro – Complexo I at IST.

Title: AWAKE: a platform for plasma wakefield acceleration and beam/plasma interaction experiments

Abstract: The main ambition of AWAKE [1] is to develop a plasma wakefield accelerator [2] driven by high-energy proton (p+) bunches available at CERN to produce high-energy electron (e-) bunches with parameters suitable for particle physics applications [3]. The mid-term plan [4] calls for self-modulaSon (SM) of the long and narrow, 400GeV p+ bunch in a first plasma so it can drive wakefields with large amplitude (~1GV/m) in a second, hundreds of meters-long plasma. In that plasma, an externally-injected e- bunch can gain hundreds of GeVs of energy and can be used, for example, for dark photon searches. SM (axisymmetric mode) [5] in the first plasma (that of current experiments) can develop as an instability or be seeded using the relaSvisSc ionization front propagating with the short laser pulse that creates the plasma [6]. The laser pulse ionizes a 10m-long column of rubidium vapor. SM can also be seeded by wakefields driven by a short e- bunch traveling ahead of the p+ bunch [7]. When the two bunches are misaligned, wakefields seed (non-axisymmetric mode) hosing (H) of the long p+ bunch [8]. Seeding makes the development of SM and H, of associated wakefields, and of their effect on the p+ bunch, reproducible from event to event [6,7]. When the p+ bunch is also made wide, the current filamentation instability (CFI) can develop [9]. The various stages of CFI (filamentation, merging, shock) could be observed along the long bunch.

I will introduce AWAKE and its goals, the experimental parameters, and setup. I will show experimental results obtained so far, especially regarding SM, H, and e- acceleration. I will also show hints of CFI occurrence. I will describe plans for the next experiments, in particular those with a discharge plasma source [10] developed in collaboration with IST. The discharge source is a possible candidate for the very long plasma needed for the future of AWAKE.

 

csm_Patric-Muggli_4a93244e84 Short bio of the speaker: Patric is the leader of the Future Accelerators Group/AWAKE at the Max Planck Insitute for Physics (MPP), in Munich, Germany since April 2011. As Physics and Experiment Coordinator, he is leading the experimental program on the AWAKE at CERN. He is the chair of the Physics and Experiment Board. As of January 1st, 2023, he is the spokesperson of the experiment. He is a Fellow of the American Physical Society and of IEEE, and a member of the panel on advanced and novel accelerators within the International Committee for Future Accelerators (ICFA). He received the 2011 ParScle Accelerator Science and Technology Award.

 

 

 

Bibliografy:

1. P. Muggli et al. (AWAKE CollaboraSon), Plasma Physics and Controlled Fusion, 60(1) 014046 (2017)
2. P. Chen et al., PRL 54, 693 (1985)
3. A. Caldwell et al., Eur. Phys. J. C 76: 463 (2016)
4. P. Muggli (AWAKE CollaboraSon), J. Phys.: Conf. Ser. 1596 012008 (2020)
5. N. Kumar et al., PRL 104, 255003 (2010)
[6. AWAKE CollaboraSon, PRL 122, 054802 (2019), F. Batsch et al. (AWAKE CollaboraSon), PRL 126,164802 (2021)
7. L. Verra et al. (AWAKE CollaboraSon), PRL 129, 024802 (2022)
8. D. H. Whilum et al., Phys. Rev. Lel. 67, 991 (1991)
9. A. Bret et al., Laser and ParScle Beams, 31(3), 487 (2013)
10. N. Lopes et al., Proceedings IPAC 2023