Dein Suchergebnis zum Thema: Tunnel

Metal tip spouts electrons with an attosecond beat

https://www.mpg.de/4367452/electrons_attosecond_beat

Electronics could possibly operate with a beat of a few tens of attoseconds in the future. Researchers at the Max Planck Institute of Quantum Optics in Garching near Munich have controlled electrons which gushed from a metal tip a few nanometres across with an accuracy of 80 attoseconds. An attosecond is only a billionth part of a billionth of a second – in this time, light can only travel a distance roughly equivalent to the diameter of an atom.
such a way that the electrons are released by the so-called quantum mechanical tunnel

Licht-durch-die-Wand-Experiment ALPS startet Suche nach Dunkler Materie

https://www.mpg.de/20353748/licht-durch-die-wand-experiment-alps-startet-suche-nach-dunkler-materie

Mit dem „Licht-durch-die-Wand-Experiment“ ALPS II startet heute bei DESY das weltweit empfindlichste modellunabhängige Experiment für die Suche nach besonders leichten Teilchen, aus denen auch die Dunkle Materie aufgebaut sein könnte. Entscheidende Beiträge zum neuartigen Experiment kommen von Forschenden des Max-Planck-Instituts für Gravitationsphysik (Albert-Einstein-Institut, AEI) und des Instituts für Gravitationsphysik der Leibniz Universität Hannover.
Dieses Video wirft einen Blick in den Tunnel des HERA-Beschleunigers, in dem das

‘Light shining through a wall’ experiment ALPS starts searching for dark matter

https://www.mpg.de/20351412/light-shining-through-a-wall-experiment-alps-starts-searching-for-dark-matter

The world’s most sensitive model-independent experiment to search for particularly light particles, of which dark matter might be composed, starts today at DESY in the form of the ‘light shining through a wall’ experiment ALPS II. Key contributions to the novel experiment come from researchers at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute, AEI) and the Institute for Gravitational Physics at Leibniz Universität Hannover.
This video sneaks into the tunnel of the HERA accelerator where the 250-metres long

Air pollution renders flower odors unattractive to moths

https://www.mpg.de/15329498/0904-choe-025591-air-pollution-renders-flower-odors-unattractive-to-moths?c=2249

Researchers showed that tobacco hawkmoths lost attraction to the scent of their preferred flowers when that scent had been altered by ozone. This oxidizing pollutant thus disturbs the interaction between a plant and its pollinator, a relationship that has evolved over millions of years.
They tested the responses of the moths in behavioral assays in a wind tunnel, allowing

Air pollution renders flower odors unattractive to moths

https://www.mpg.de/15329498/0904-choe-025591-air-pollution-renders-flower-odors-unattractive-to-moths

Researchers showed that tobacco hawkmoths lost attraction to the scent of their preferred flowers when that scent had been altered by ozone. This oxidizing pollutant thus disturbs the interaction between a plant and its pollinator, a relationship that has evolved over millions of years.
They tested the responses of the moths in behavioral assays in a wind tunnel, allowing