idw – Informationsdienst Wissenschaft
Nachrichten, Termine, Experten
Nachrichten, Termine, Experten
idw - Informationsdienst
Wissenschaft
Success reported from the AWAKE project: Researchers have succeeded for the first time in generating a wave-shaped plasma field with the aid of a proton beam – an approach which paves the way for a completely new type of particle accelerator. In the future, the scientists involved plan to accelerate electrons on a plasma wave. In the long term, this technology could form the basis for new accelerators.
It is already possible to foresee that the information from existing accelerator experiments is limited. Many unresolved questions regarding the structure of matter or the origin of the universe can only be answered if particles collide at even higher energies. The current record holder is the Large Hadron Collider (LHC) – with a circumference of 27 kilometers it accelerates protons to an energy of up to 13 teraelectronvolts. The record for electrons is around 100 gigaelectronvolts.
In order to reach even higher energies, particularly for electrons, larger installations would have to be built. A smaller, more economical alternative is offered by a completely new concept: This is based on the observation that a plasma, a mixture of charged particles, can establish and maintain strong electric fields.
Objective: To accelerate electrons on a plasma wave
This is what the AWAKE project will take advantage of. “In simple terms, a proton beam generates waves in the plasma – similar to the wake of a speedboat in water,” explains Allen Caldwell, AWAKE spokesperson and Director at the Max Planck Institute for Physics. “If electrons are added, they are accelerated in the oscillating plasma field.”
Although the principle is not new, it has thus far been possible to achieve these plasma modulations only with the aid of lasers or electrons. “With AWAKE, we have shown for the first time that we can also achieve this effect with protons,” says Caldwell. The advantage of protons: Bundles of protons transport significantly more energy. This means that electrons accelerate over a longer distance and gain energy in the process.
AWAKE uses earlier CERN experiment
“By this means, we have heralded a new era for the development of innovative accelerator technologies,” says Caldwell with confidence. The AWAKE experiment has been set up at the CERN nuclear research center, where a proton beam from an earlier experiment can be used. The current experiment is the result of three years of intense development work. The plasma cell had already been installed at the beginning of this year.
The plan for 2017 is to investigate the interaction between proton beam and plasma field in more detail. The AWAKE research collaboration then plans initial experiments to accelerate electrons on the plasma wave. By the end of 2018, the next longer stop of the LHC, acceleration fields in the range of one gigaelectronvolt per meter, are to be generated.
https://www.mpp.mpg.de/en/what-s-new/news/detail/protonen-schlagen-wellen-awake-...
A scientist of the Max Planck Institute for Physics working at the AWAKE experiment.
Source: Maximilian Brice/CERN
Electrons surfing a wave: A proton beam (boat) generates waves in a plasma. Surfers (electrons) can ...
Source: OSIRIS/IST, Portugal
Criteria of this press release:
Journalists
Physics / astronomy
transregional, national
Research projects
English
You can combine search terms with and, or and/or not, e.g. Philo not logy.
You can use brackets to separate combinations from each other, e.g. (Philo not logy) or (Psycho and logy).
Coherent groups of words will be located as complete phrases if you put them into quotation marks, e.g. “Federal Republic of Germany”.
You can also use the advanced search without entering search terms. It will then follow the criteria you have selected (e.g. country or subject area).
If you have not selected any criteria in a given category, the entire category will be searched (e.g. all subject areas or all countries).
