Tag Archives: laser

German Navy Laser Gun Demonstrator to Field | Instant News

Previous Rheinmetall laser demonstrator (Rheinmetall)


Maritime Executive

11-27-2020 02:59:36

The German navy joins a growing club of military powers developing ship laser weapons. Germany’s defense procurement agency, BAAINBw, has contracted with Rheinmetall to develop a laser demonstrator that can be used in naval applications.

The new 20 kW class laser source is about one-third more powerful than the US Navy’s LaWS laser demonstrator, which is mounted on the USS amphibious. Ponce in 2014 for testing in the short-range defense role against minor threats, such as drones and small boats. (The test was successful Ponce since disabled.)

In mid-2020, BAAINBw contracted Rheinmetall to build its own demonstrators for prices in eight figures. The device is intended to be used in multiple projects for several military applications, but the first for a laser demonstrator will be a year-long test phase aboard a German Navy frigate. Saxony.

The Rheinmetall system is based on the spectral coupling technology, which the company has developed over the years. It consists of twelve nearly identical two kilowatt solid-state fiber laser modules with high beam quality. A beam combiner – a device that converts multiple beams into a single beam using dielectric network technology – pairs twelve fiber laser beams to form a single beam.

Rheinmetall says that the spectral coupling technology has advantages when compared to the geometric coupling systems used by other contractors: it is not very complex, it is highly modular and passive, it requires very little control effort. Contractors believe it can be upgraded to the 100 kW performance class required for longer range, higher power roles – such as anti-aircraft / anti-missile point defense.

In 2015, during trials conducted in the Baltic, Rheinmetall’s team engaged targets on the ground with a ship’s laser weapon system for the first time in Europe. In 2018, BAAINBw and Rheinmetall successfully tested a laboratory-based 20 kW laser source. The new trials, which will be carried out in a military setting, will take the project from a laboratory to a real-world installation in a span of three years.


image source

Wild new paper proposes to use “tractor beam” to control lightning strikes | Instant News

This sounds like something from a science fiction movie, but real-life scientists have been busy studying ultra-precise laser tractor beam systems to change the path and direction of lightning.

There is also a very practical reason behind it: lightning strikes are the main cause of fires Australia’s bushfiresAnd more and more American wildfireTherefore, the lightning transfer system has the potential to save lives, keep wildlife safe and protect a large number of important ecosystems.

“We can imagine a future in which the technology might sense the electrical discharge from lightning strikes, help guide it to safe targets and reduce the risk of catastrophic fires,” The physicist Vladlen Shvedov said From the Australian National University.

The system uses a laser beam to mirror the same process of lightning to create a path and specific target for the discharge.

In short, lightning is just an electric current that bridges the gap between the positively charged points on the ground and the negatively charged points at the bottom of the thundercloud (generated by the strong activity of the thundercloud).

The laser beam proposed by the researchers sets a point for releasing this discharge.In their experiment, they used Graphene The particles act as charge mediators.

“Here, we propose and demonstrate an effective method for triggering, capturing and guiding electrical discharges in the air. The method is based on the use of a low-power continuous wave vortex beam that captures and transmits light-absorbing particles in the air,” The team wrote in the research.

Of course, researchers have not tested this laser-induced air heating system in the case of actual lightning generation in the field, but the small-scale results obtained in the laboratory show that it can accurately control lightning and other discharges.

“The experiment simulated atmospheric conditions similar to those in real lightning,” Sevedov says.

The technology can work over a long distance and only requires a low-power laser, which makes the system reasonably priced, accurate and easy to assemble.The laser intensity used here is approximately previous studies.

Although the word Traction beam Actually originated from science fiction-later known as Star Trek – The laser system developed here complies with the instructions.It is moving lightning, not USS Enterprise, But the same principles apply.

In addition to lightning, the same detailed discharge control shown here can also be used in manufacturing and medicine-for example, to carefully remove cancer tissue without invasive surgery.

“We have an invisible line. This is a pen. We can use it to write light and control the discharge within one-tenth of the width of a human hair.” The physicist Andrey Miroshnichenko said, From the University of New South Wales, Canberra.

“We really started to learn what this new technology might mean.”

The research has been published in Nature Communications.


image source

It’s a strange time to travel | To select | Instant News

Next week we will be in Pennsylvania to visit our daughter who is at school in Erie on Lake Erie This will be one of our most unique trips as face masks are needed for almost the entire trip . Traveling is just not what it used to be. Do you remember when people smoked cigarettes in the middle of the flight? A little light came on to tell the passengers it was time to put out their cigarettes, we were going to land. Smokers who flew on the plane at the time were very upset when new rules banned smoking on board. I have a feeling these same people would be really unhappy with the requirement to wear a mask for the entire flight We received an email reminding us that anyone over 2 years old must also wear a mask at airports except when we were We were also told that we would receive an “ all-in-one ” snack bag that included a wrapped disinfectant wipe, an 8.5 ounce water bottle and two snacks, as well as a sealed drink on flights over 2 hours and 20 minutes. “On flights shorter than that, we’ll have a sealed drink and that’s it. No more friendly flight attendant taking our drink order. Erie is quite close to Niagara Falls. We were wondering if we could see it or not, as people like to go to the Canadian side for a better view, and the border between the US and Canada is closed at least until the end of August. which is the boat that takes you near the falls, was closed in June, it is now open on the US side and available for people in good health, wearing masks and willing to stand at least 6 feet from other people on a small boat .Fort Niagara opened in July and is available for healthy masked visitors, which is the same for all the restaurants we stop at. There won’t be any buffets though, and it looks like food “that requires minimal preparation” will be the rule. Fortunately, Pennsylvania is not on the list of states that require a 14-day quarantine when we arrive home. We were also assured that the plane is cleaned within an inch of its life and that airports will be cleaner than our homes. Still, we have small containers of disinfectant to use liberally when we feel too far away from a sink and soap, and we’ll avoid other people like the plague. our face, and white where the mask was. It’s a strange time to travel. .

image source