Physics
774 views | +0 today
Your new post is loading...
Your new post is loading...
Rescooped by Mikko Hakala from Nuclear Physics
Scoop.it!

A new way to make X-rays

A new way to make X-rays | Physics | Scoop.it
MIT researchers have found a phenomenon that might lead to more compact, tunable X-ray devices made of graphene.

Via Theo J. Mertzimekis
Mikko Hakala's insight:

 

This theoretical research predics a new X-ray generation method based on confined plasmons in graphene. The concept is unique and it would be a highly advantageous method, since low-energy electrons can be used to produce tunable X-rays. In all the current approaches high-energy charged particles are needed (synchrotrons, free-electron lasers), which requires large device sizes and intensities.

 

Press release: http://news.mit.edu/2015/new-way-make-x-rays

Article: http://www.nature.com/nphoton/journal/vaop/ncurrent/full/nphoton.2015.223.html

 

X-rays are used for research and diagnostics purposes in materials and natural sciences, in engineering, and for biomedical and life sciences.

 

Note the upcoming X-ray workshop in Helsinki 3.-4.12.2015:  http://www.fsruo.fi/index.php/en/workshops-and-schools-2/fsruo2015 (public lectures)

 

more...
No comment yet.
Scooped by Mikko Hakala
Scoop.it!

European XFEL - News - 2014 - Watching molecular matches

European XFEL - News - 2014 - Watching molecular matches | Physics | Scoop.it

Scientists at the European XFEL will watch the interplay of molecules with the instrument FXE, allowing stunning insight in the electronic forces driving the world of chemistry.

Mikko Hakala's insight:

 

Chemical reactions take place in femtoseconds (10^-15 s). Traditionally one just analyses the initial and final products of a reaction, but new instruments like X-ray free electron lasers start to enable following the actual development of the geometries and electronic states.

 

The femtochemistry as studied at European XFEL is explained in the feature article: http://www.xfel.eu/news/2014/watching_molecular_matches/index.html

 

See a simulation of an UV-light triggered reaction: https://www.youtube.com/watch?v=qAT6SkiEN9M

 

 

more...
No comment yet.
Scooped by Mikko Hakala
Scoop.it!

Scientists capture ultrafast snapshots of light-driven superconductivity

Scientists capture ultrafast snapshots of light-driven superconductivity | Physics | Scoop.it
A new study pins down a major factor behind the appearance of superconductivity—the ability to conduct electricity with 100 percent efficiency—in a promising copper-oxide material.
Mikko Hakala's insight:

X-ray studies bring insight into developing room-temperature superconductors. This laser pump - x-ray probe experiment showed that the appearance of superconductivity is not related to lattice distortions (the distortions persist longer than the melting of charge stripes, i.e. the point where superconductivity emerges).

 

The findings are relevant for understanding generally the mechanism of superconductivity in layered copper oxide materials, and in the new field of light-induced superconductivity.

 

The experimental x-ray method used was resonant soft x-ray diffraction.

more...
No comment yet.
Scooped by Mikko Hakala
Scoop.it!

Synchrotron Light Finland 2015

Synchrotron Light Finland 2015 | Physics | Scoop.it

Annual Workshop & School of the Finnish Synchrotron Radiation User Organisation

Helsinki, Kumpula Science Campus, 3.-4.12.2015

 

Public lectures 

*Thursday 3rd December, 12:00-17:00 Physicum building, hall E204

*Friday 4th December, 9:00-12:00 Exactum building, hall CK112

 

Invited keynote lecturers

*Prof. Olle Björneholm, Uppsala University, Sweden: From molecules to rain: Probing atmospherically relevant aqueous surfaces with XPS

*Dr. Daniel Clare, Diamond Light Source, UK:
The UK national electron microscope facility, direct electron detectors and helical viruses

*Dr. Ulla Vainio, Helmholtz-Zentrum Geesthacht, Germany:Harder, Better, Faster - X-ray scattering experiments at synchrotrons

*Acad. Prof. Maarit Karppinen, Aalto University, Finland:Title TBA

 

Mikko Hakala's insight:

Welcome to the meeting & visit the page for updates.

 

more...
No comment yet.
Rescooped by Mikko Hakala from Nuclear Physics
Scoop.it!

Upgrade for European light source

Upgrade for European light source | Physics | Scoop.it

European Synchrotron Radiation Facility (ESRF). One of Europe's premier scientific research laboratories is to go through a major upgrade.


Via Theo J. Mertzimekis
Mikko Hakala's insight:

 

European Synchrotron Radiation Facility (ESRF) is a most powerful X-ray machine in Europe, supported and shared by 20 countries. See http://www.esrf.eu/ ;

 

ESRF is going through a major upgrade. This BBC article by @BBCAmos (via @tmertzi) tells some essential information what this means to ESRF. See how much more radiation will be obtained, how much will the upgrade cost and the timetables.

 

How synchrotron X-rays are generated and how research is done with them? Here is one recent video from a canadian synchrotron explaining basic operation:

http://globalnews.ca/video/1439365/synchrotron-matters

(via @CanLightSource, @lightsources)

 

Follow ESRF in Twitter: @esrfsynchrotron

 

more...
No comment yet.