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This section provides an overview for gyrotron as well as their applications and principles. Also, please take a look at the list of 7 gyrotron manufacturers and their company rankings. Here are the top-ranked gyrotron companies as of December, 2024: 1.DEXTER MAGNETIC TECHNOLOGIES, 2.Quaise Energy, 3.Gyrotron Technology, Inc..
Table of Contents
A gyrotron is a type of vacuum tube device in which electrons orbit around a magnetic field generated by a superconducting coil. These electrons are accelerated by high-speed rotational energy and then converted into high-power millimeter-wave microwaves, which are emitted in a cavity resonator.
The term "gyro" refers to rotation and involves the Cyclotron Resonance Maser (CRM) phenomenon. CRM is a process where the kinetic energy of electrons, rotated by electromagnetic force, is transformed into microwaves.
The millimeter wave band, ranging from 1mm to 10mm in wavelength and 30GHz to 300GHz in frequency, is known for its high linearity and large information-carrying capacity.
Gyrotrons have several applications:
Gyrotrons, as high-power radio wave sources in the millimeter wave band, are being increasingly researched for applications in advanced Beyond 5G/6G communications.
Gyrotrons operate on the principle of the cyclotron resonance maser phenomenon. Electrons emitted from an electron gun inside the gyrotron gain spiral kinetic energy as they pass through a superconducting magnetic field. This energy is converted into high-power electromagnetic waves in the millimeter wave band inside a cavity resonator.
Electrons, accelerated by a high voltage (about 100 kV) in an electron gun, obtain high-speed rotational energy when passing through a magnetic field generated by a superconducting magnet (up to 10 T (tesla)). These electrons spiral into a collector in the vacuum tube, which ultimately captures them.
As the spiraling electrons pass through a resonator, they resonate and lose some kinetic energy, which is then converted into electromagnetic waves. These waves are reflected multiple times within the gyrotron and finally emitted through a window, such as an artificial diamond, as high-power millimeter-wave electromagnetic waves.
Nuclear fusion technology is regarded as a promising future power generation method. High-power sub-THz millimeter waves from gyrotrons are transmitted to a fusion reactor, about 100 meters away, to heat the plasma and initiate nuclear fusion.
The International Thermonuclear Experimental Reactor (ITER), a global collaboration project for clean energy generation, is expected to start operation in 2025. Developing gyrotrons for heating and various measurements in fusion facilities is being actively pursued.
One of the most promising fusion facilities is the Tokamak fusion reactor. The plasma must be heated to ultra-high temperatures in a strong superconducting magnetic field in this reactor. The superconducting magnetic field varies between the center and the edges of the reactor. Therefore, having a gyrotron that can select multiple resonance frequencies is advantageous for maximizing the use of the reactor's interior.
As per a 2022 announcement by Japan's National Institute of Quantum Science and Technology, improvements in gyrotron components will enable one megawatt-class operation for 300 seconds at three millimeter-wave frequencies (170 GHz/137 GHz/104 GHz). This advancement is a significant step towards the practical application of nuclear fusion. Furthermore, a breakthrough in increasing the gyrotron's oscillation frequency to 1013 GHz (THz band) was achieved in 2005 at the University of Fukui's Center for Far Infrared Research and Development. Joint research for various applications continues both in Japan and internationally.
*Including some distributors, etc.
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DEXTER MAGNETIC TECHNOLOGIES, a renowned manufacturer of magnetic solutions, was established in 1951 in the United States. The company excels in producing an array of magnetic products, including precision magnetic assemblies and custom magnets. With a calling to innovation, DEXTER MAGNETIC TECHNOLOGIES has maintained a pioneering stance in magnetic technology advancement. Their expertise lies in offering cutting-edge magnetic solutions across industries like aerospace, medical, and automotive, resulting in elevated performance and efficiency. DEXTER MAGNETIC TECHNOLOGIES shines in devising tailored magnetic answers to address distinctive challenges. Notably, their precision magnetic assemblies play a crucial role in medical imaging equipment, ensuring precise diagnosis.
Communications & Power Industries (CPI), founded in 1948 and headquartered in Palo Alto, California, is a designer and manufacturer of electronic components and subsystems. The company’s range of products includes amplifiers, antennas, medical imaging products, microwave power sources, and microwave transmitter subsystems. CPI's products cater to multiple industries, including telecommunications, defense and aerospace, medical, industrial, and scientific research. Their electronic components and subsystems play critical roles in communication systems, medical equipment, industrial processes, and scientific applications that require precise electronic solutions.
Founded in 1915, Canon Electron Tubes & Devices Co., Ltd. is a Japanese manufacturer operating under Canon, Inc. The company's headquarters is located in Otawara, Tochigi, with representative offices in Tokyo, China, the USA, and Europe. The company introduced Japan's first X-ray tube in 1915. Since then, it has developed various components incorporating X-ray tubes for medical, industrial, and scientific applications. Additionally, the company produces environmentally conscious products (ECPs) to minimize environmental impact. For example, the multi-beam klystron can be operated with a low operating voltage for a relatively longer period of time due to the optimized cathode loading.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | DEXTER MAGNETIC TECHNOLOGIES |
21.7%
|
| 2 | Quaise Energy |
18.9%
|
| 3 | Gyrotron Technology, Inc. |
17.5%
|
| 4 | Cryomagnetics, Inc. |
13.2%
|
| 5 | Kyoto Fusioneering., Ltd |
12.3%
|
| 6 | Communications & Power Industries(CPI) |
10.8%
|
| 7 | Canon Electron Tubes & Devices Co., Ltd. |
5.7%
|
Derivation Method
The ranking is calculated based on the click share within the gyrotron page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
4 | 66.7% |
|
Japan
|
2 | 33.3% |
