Chapter 659: Amazing experimental results

? Bubbles in the liquid can be stably suspended and pulsated periodically under the driving of a certain sound field. In the collapse phase, bubbles can produce a volumetric compression ratio and high temperature and pressure on the order of picoseconds. When the driving sound pressure is large enough, energy accumulation will cause bubbles to emit light, and this phenomenon is called sonoluminescence.
Under appropriate driving conditions, sonoluminescent bubbles can remain spherical, and nonlinear vibrations can accurately repeat millions or billions of cycles. It is precisely this characteristic that provides a possible idea for achieving controlled fusion at relatively low temperatures.
At this moment, Jinling Institute of Advanced Studies.
The center of the Acoustics Laboratory of the Institute of Physics has been temporarily requisitioned by a controlled fusion miniaturization research team led by Lu Zhou. Located on the experimental table in the center of the laboratory, a transparent container with a radius of about three inches was placed.
The entire transparent container is filled with clear and viscous concentrated sulfuric acid. High-power ultrasonic generators are connected to both sides of the container. Various precision instruments and equipment are displayed around the entire set of equipment, always ready to collect experimental data.
Because the phenomenon of sonoluminescence occurs in picosecond flashes, it is difficult for general laboratory cameras to collect all the flash information, especially the moment when the bubble collapses to a minimum.
For this experiment, Lu Zhou even borrowed the only "phase-locked integral imaging imaging experiment system" from the Jinda Institute of Acoustics.
In addition to some special acoustic experiments, this system is also commonly used to study anti-submarine sonars. If it were not for Lu Zhou's face, how could the director of the Institute of Acoustics agree to lend equipment.
Standing next to the experimental device, Sheng Xianfu, who had completed the experimental preparations, set his sights on the land boat standing aside.
Lu Zhou nodded and said.
"let's start."
"Yes."
Taking a deep breath, Sheng Xianfu walked to the nearest computer and quickly pressed a few buttons.
With a brief mosquito sound ephemeral, the high-power ultrasonic generator began to release into the solution ultrasonic waves carrying huge amounts of energy.
It was confirmed that the sound pressure in the working fluid had reached the standard of 5 times the atmospheric pressure, and Lu Zhou immediately continued to order.
"Inject Xenon!"
"Yes!"
With the injection of xenon gas, a bubble slowly floated from the bottom of the container, and floated in the center of the container driven by the sound field.
Immediately afterwards, the power of the ultrasonic transmitter began to gradually increase, and the sound pressure applied to the bubbles also increased.
At the moment when the sound pressure acting on the bubbles reached 15 times the standard atmospheric pressure, the xenon bubbles floating in concentrated sulfuric acid were like a bright light, flashing purple to white light instantly!
Seeing this scene, the researchers around the experimental device have a smile on their faces.
Although this is only a test of the experimental device, there is still a long way to go before it is truly successful, but this is undoubtedly a good start.
The air bubbles suspended in the working liquid continuously flashed 10 groups of light. The photos under the light-emitting state were collected by the phase-locked integral imaging imaging system. Several acoustic physics experts at the Institute of Advanced Technology immediately analyzed the photos and determined the light emission by spectrum. Temperature and power.
After receiving the experimental data from Sheng Xianfu, Lu Zhou glanced briefly.
The luminous power is about 130, although it is just a momentary flash, it is also quite amazing. As for the peak temperature of the bubble surface, the most prominent group is the horror figure of 1.5 million Kelvin, just like a star floating in solution!
Of course, this data is not necessarily accurate.
After all, the collapse of a bubble happens in an instant. It is not easy to measure the temperature at this instant, let alone reduce the error of the data.
"The results of the first phase of the experiment were very successful. We are ready to enter the next phase," put the experiment report on the table, and Lu Zhou continued to command Sheng Xianfu, who was standing next to him. Deuterium and tritium mixed gas! "
Sheng Xianfu nodded seriously: "Yes!"
The first stage of the experiment was only to check whether the device was designed to be reasonable and to provide sufficient sound pressure for the bubble, so that the temperature of the bubble reached a temperature of more than one million Kelvin in an instant.
It now appears that their experiments were successful.
When the xenon floating in the working liquid is compressed to a point that is invisible to the naked eye, the energy condensed at a point releases a brighter light than the point on the star.
Although the temperature of the million-Kelvin level is still far from the ignition conditions of controlled fusion, the conditions that contribute to controlled fusion are not just temperature.
The sound pressure acting on the bubble not only brings the high temperature of millions of Kelvin to the bubble, but also the density of horror!
And density is also one of the conditions for fusion reaction!
At the command of Lu Zhou, the researchers in the laboratory put the transparent container into a black box made of neutron shielding material, and closed the phase-locking integration imaging imaging experiment system, followed by the previous experimental steps. Repeated.
It's just that the gas passed in has been changed from xenon to deuterium and tritium mixed gas, and the power of ultrasonic generation has also been increased from the original order of magnitude to a new order of magnitude!
The experiment continues.
Although the black box blocked the sight of everyone, it did not hinder anything.
Some things don't need to be seen intuitively, intuitive data is more reliable than everything.
The researcher who took the container full of concentrated sulfuric acid out of the black box and identified the radiation damage and neutron amplification rate immediately conducted a detailed analysis of the collected data.
Standing next to the researcher, Lu Zhou waited quietly for the results of the experiment.
It took about half an hour.
Finally, the results came out.
"The observation results are coming out!" A strong joy appeared on his face, and the researcher quickly passed the completed experiment report to Lu Zhou's hand, and made a report excitedly. According to the damage detection, there is enough evidence that during the test period, the presence of 2.5 MeV neutrons bombarded the material surface ... The neutron increase rate is estimated to be 1.7%! "
"Confirm the fusion reaction!"
The moment he heard this, everyone in the laboratory showed an excited expression on his face, and there was no cheering.
In particular, Sheng Xianfu tightened his fists with excitement.
This experimental idea works!
There is no more exciting news for him.
Of course, although the results of the experiment are very pleasing, the data of the neutron amplification rate is ~ EbookFREE.me ~ The experiment itself is not optimistic.
From previous experiments, they have at most observed signs of fusion reaction. It is still far away from using this device to perform stable and controlled fusion reaction.
Staring at the data in the experimental report, Professor Li Changxia said solemnly: "The neutron amplification rate is still too low. If you want to achieve stable operation of controllable fusion ... This level of sound waves may not be enough."
Lu Zhou nodded in agreement, saying, "You are right, in the current conditions, it is difficult to achieve a stable, controlled fusion reaction. And to do this, we must change the working fluid."
Professor Li Changxia: "What kind of working fluid are you going to try?"
Lu Zhou shook his head: "I don't know, but I have a possible idea."
"Thinking?"
"Yes," Lu Zhou nodded. "Since the traditional liquids at room temperature can't meet the requirements, why don't we try liquid metal? For example, liquid lithium, I think it is a worthwhile choice ..."