The bubbles in the liquid can be stably suspended and periodically pulsated by a certain sound field. In the case of a collapsed phase, the bubble can produce a volumetric compression ratio of a million and a high temperature and pressure on the order of picoseconds. When the driving sound pressure is large enough, the accumulation of energy causes the bubbles to illuminate, and this phenomenon is called the sonoluminescence phenomenon.

In the proper driving situation, the sonoluminescence bubbles can remain spherical, and the nonlinear vibration can be accurately repeated for millions or hundreds of millions of cycles. It is also such a characteristic that provides a possible idea for achieving controlled fusion under relatively low temperature conditions.

At this moment, Jinling Institute of Higher Education.

The center of the Institute of Physics of the Institute of Physics has been temporarily requisitioned by the controlled fusion miniaturization research team led by Lu Zhou. On the lab table in the center of the lab, a transparent container with a radius of about three inches is being placed.

The entire transparent container is filled with clear and viscous concentrated sulfuric acid. High-powered ultrasonic generators are attached to both sides of the container. Various sophisticated instruments are placed around the entire unit, ready to collect experimental data.

Since the phenomenon of sonoluminescence occurs with picosecond scintillation, it is difficult for a laboratory camera to collect all the flash information, especially at the moment when the bubble collapses to a minimum.

For this experiment, Lu Zhou even borrowed the only set of "phase-locked integral imaging imaging experimental system" from Jinda Acoustics Research Institute.

In addition to some special acoustic experiments, this system is also generally used to study anti-submarine sonar. If it is not on the face of Lu Zhou, how can the director of the Institute of Acoustics agree to lend equipment.

Standing next to the experimental device, Sheng Xianfu, who has completed the preparation of the experiment, turned his attention to Lu Zhou standing on the side.

Lu Zhou nodded and said.

"let's start."

"Yes."

Taking a deep breath, Sheng Xianfu walked to the nearest computer and quickly knocked out a few buttons.

As a short mosquito sound is fleeting, the high-powered ultrasonic generator begins to release ultrasonic waves carrying large amounts of energy into the solution.

It is confirmed that the sound pressure in the working fluid has reached the standard of 5 times atmospheric pressure, and Lu Zhou immediately continues to order.

"Injecting suffocation!"

"Yes!"

With the injection of helium, a bubble floats slowly from the bottom of the container and floats in the center of the container driven by the sound field.

Immediately thereafter, the power of the ultrasonic transmitter begins to gradually increase, and the sound pressure applied to the bubble also increases.

Just at the moment when the sound pressure acting on the bubble reaches 15 times the standard atmospheric pressure, the helium bubble floating in the concentrated sulfuric acid is like the same beacon, and the purple to white light flashes instantly!

Seeing this scene, the researchers around the experimental device showed a hint of joy on their faces.

Although this is only a test of the experimental device, there is still a long way to go before it really succeeds, but this is definitely a good start.

The bubbles suspended in the working fluid continuously flashed 10 sets of rays, and the photos under the illuminating state were collected by the phase-locked integral imaging imaging system. Several acoustic physicists of the Institute of Advanced Studies immediately analyzed the photos and determined the luminescence by the spectrum. Temperature and power.

After taking over the experimental data from Sheng Xianfu's hands, Lu Zhou simply looked at his eyes.

The luminous power is around 130w, although it is only a flash of instant, but it is quite amazing. As for the peak temperature of the bubble surface, the most prominent group is the horror number 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 the bubble is a matter of moments. It is not an easy task to indirectly measure the temperature of this moment, let alone reduce the error of the data.

“The results of the first phase of the experiment were very successful, and we are ready to move on to the next stage.” The experimental report was placed on the table. Lu Zhou continued to tell Sheng Xianfu standing next to him, “Add a neutron shielding layer to the container and prepare for injection.氘氚 mixed gas!"

Sheng Xianfu nodded seriously: "Yes!"

The first stage of the experiment was only to test whether the design of the device was reasonable, and whether the sound pressure could be provided to the bubble so that the temperature of the bubble reached the temperature level of more than one million Kelvin in an instant.

It seems that their experiments have been very successful.

When the helium floating in the working fluid is compressed to an undetectable point of the naked eye, the energy condensed at one point releases a more dazzling light than the point on the star.

Although the temperature in the Million Kelvin class is still far from the ignition conditions of controlled fusion, the conditions that lead to controlled fusion are not just temperature.

The sound pressure acting on the bubbles is not just a high temperature of millions of Kelvin, but also a horrible density!

Density is also one of the conditions for fusion reactions!

At Lu’s command, the researchers in the lab placed the transparent container in a black box made of neutron shielding material and turned off the phase-locked integral imaging imaging experiment, followed by the previous experimental steps. Repeated.

However, the gas that has been introduced has been changed from helium to helium, and the power of the ultrasonic has increased from the original magnitude to a new magnitude!

The experiment continues.

Although the black box blocks everyone's attention, it does not hinder anything.

Some things don't need to be seen intuitively, and intuitive data is more reliable than everything.

The researchers who took the container filled with concentrated sulfuric acid from the black box and were responsible for the identification of the radiation damage and the neutron amplification rate immediately analyzed the collected data in detail.

Standing next to the researcher, Lu Zhou quietly awaited the results of the experiment.

It took about half an hour.

Finally, the result came out.

“The observations came out!” A strong smile appeared on the face. The researcher quickly handed the completed experimental report to Lu Zhou’s hand and reported it with excitement. “Through the surface of the neutron shielding material. According to the damage detection, there is enough evidence to surface the surface of the material during the test period, 2.5mev neutron bombarded the surface of the material... The neutron amplification rate is estimated to be 1.7%!"

"Confirm that the fusion reaction has occurred!"

At the moment of hearing this sentence, all the people in the lab showed an excited expression on their faces, and they did not cheer out.

In particular, Sheng Xianfu, excitedly squeezed the boxing.

This experimental idea works!

For him, there is no more exciting news than this.

Of course, although the results of the experiment are very gratifying, the data of the neutron increase rate is not optimistic.

From previous experiments, most of them observed signs of fusion reactions, and it is still far away from using this device for stable and controlled fusion reactions.

Staring at the data in the experimental report, Professor Li Changxia looked dignified: "The neutron increase rate is still too low, and it is necessary to achieve stable operation to maintain controlled fusion... This level of sound waves may not be enough."

Lu Zhou agreed to nod and said: "You are right. Under the current conditions, it is very difficult to achieve stable and controllable fusion reactions. To do this, we must replace 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."

"Thoughts?"

"Yes," Lu Zhou nodded. "Since the traditional liquid 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..."