Steering Laser Pulses



The Australian National University and the Tala Institute of Fundamental Research in Mumbai have published a study in the journal Laser and Photonic Reviews. The team has shown a new way to steer a beam of relativistic electron pulses. 

The scientists used an ultrahigh intensity femtosecond laser. Beams of high energy electrons are important for applications like medical therapies and imaging. These beams are created from accelerators. These are expensive, complex,  large size devices with high powered control and electrical systems. Each accelerator is specifically geared, making modifications difficult. High intensity femtosecond laser pulses are pointed at plasma targets and the beaming of the electrons is usually along the direction of the laser itself. 

Scientists are looking to discover ways to get electrons at larger fluxes, like a solid target. This larger flux would control the directionality of electrons. The control of energies is from the laser's incident direction. The beams are broad in their angular speed and even broader at higher intensities. In the past, changing direction or beam width was very difficult.  New lasers use a solid with a surface decorated with nanopillars.  The scientists produce MeV energy pulses of electrons. The electrons are driven into a narrow beam by adjusting the laser incidence angle.

The nanostructure intensifies the local electric fields. It provides higher acceleration than planar surfaces can produce. To summarize, the steering of electrons in specified directions is greatly advanced by these nanoparticles. The authors call this, "plasma nanophotonics"

Comments

Post a Comment

Popular posts from this blog

Mike Giradi from Stereotimes commentary on Holostage Room Treatments

I have been  friends with Mike Giradi for a few years and he has helped me test numerous designs .    I was so honored a few weeks ago when he agreed to give these Holostages a few words.  From. Mike G. The sound was a little closed in at first, but then it really opened up to prove it is another great audio product. The noise floor is greatly reduced. I am hearing details I've never heard before. When it's in the recording, the soundstage widens in all directions. The timbre of each instrument is spot on. The six Holostages installed in my room aided in the C13 alignment of air molecules to a far greater extent than the Bybee IQSE devices I had previously been using. Every instrument had greater depth, pop and presence. Listening to classical music on movie soundtracks is incredible now. The Holostages installed on my BACCH4MAC and monoblocks was the answer to what was needed. The noise floor dropped significantly in both cases resulting in greater clarity and music...
Read more

Queen Bee 🐝

Image
  Bees hide an interesting secret. When the hive loses its queen, who alone is able to give life to the colony and maintain order in a perfectly organized society, all seems lost. The life of the hive slows down. Without new eggs, the future is lost. In a few weeks, the colony may be doomed. But the bees do not panic. Nor do they expect salvation from outside. Demonstrating extraordinary collective intelligence and profound instincts, they trigger spectacular emergency procedures, almost unimaginable in a world dominated by insects. --- ◆ The transformation begins with a simple but essential choice The worker bees choose common larvae - those who would normally be mere workers. They are nothing special. They are not born different. But their fate changes completely. They are chosen to receive a special food: royal jelly. A rare substance, produced by healthy bees, rich in proteins, vitamins and bioactive compounds. This is royal food in the purest sense of the word. The larvae fed ...
Read more

New Highly Conductive Polymer

Image
A new study from an international research team was published in the journal nature. The team has created a multi layered two dimensional polyaniline (2DPANI) crystal. The material has a unique metallic out of plane charge transport and is highly conductive. There are many different types of conducting polymers, such as polyaniline, polythiophene and polypyrrole. These polymers are best known for their electrical conductivity. They are low cost, flexible and lightweight, making them a possible alternative to traditional metals and semiconductors. Charge transport between polymer chains has been a huge challenge that scientists are addressing. Researchers from the round the world are collaborating, including Ningbo Institute of material technology and engineering (NIMTE) Of the Chinese academy of sciences ( CCAS), TU Dresden, The max Planck  Institute of microstructure physics and CIC nanoGUNE BRTA. They have developed a new 2DPANI crystal. They used a topology directed 2D depolymer...
Read more