Recently, engineers at the University of California at Berkeley invented a device that greatly reduces the amount of energy required to power a magnetic field detector. This device is expected to revolutionize how we measure the magnetic fields flowing through electronic devices, the Earth, and even the human body. New equipment developed by engineers at the University of California at Berkeley provides low-cost, high-efficiency magnetic field detection. (Source: Windell Oskay) “The best magnetic sensors today are so large that they can only work at extreme temperatures and cost tens of thousands of dollars.†Dominic Labanowski said he is a postdoctoral fellow in the Department of Electrical Engineering and Computer Science, helping to create this injection. A device made of nitrogen diamond, he said that this sensor can replace sensors that are difficult to use in many applications such as navigation, medical imaging and natural resource exploration. Dominic Labanowski Whenever a diamond-based sensor measures a magnetic field, it must first be blasted with 1 to 10 watts of microwave radiation to make it sensitive to the magnetic field, which is sufficient to melt the electronic components. Researchers have discovered a new method of exciting tiny diamonds using microwaves, which is about 1/1000 of the original, making it possible to manufacture magnetic sensing devices for electronic devices such as cell phones. Professor Sayeef Salahuddin Defective diamond Bombardment of the diamond with a nitrogen jet can remove some highly ordered carbon atoms and replace them with nitrogen atoms. These nitrogen invaders are also known as nitrogen vacancy (NV) centers, giving the entire diamond a unique property. Medical applications of magnetic sensors include the use of magnetic fields to measure brain magnetograms of brain waves, or the use of magnetic fields to image cardiac magnetism. These machines are currently equivalent to a small room and can cost more than $3 million. The main content comes from compilation and compilation, for reference only. Original link: http://news.berkeley.edu/2018/09/10/diamond-dust-enables-low-cost-high-efficiency-magnetic-field-detection/ Wall-mounted UV Air Sterilizer Uv Sterilizers,Hospital Uv Air Sterilizer,Wall Mounted Uv Air Sterilizer,Wall Mounted Uv Air Sterilizer Dongguan V1 Environmental Technology Co., Ltd. , https://www.v1airpurifier.com
This work was done by Professor Sayeef Salahuddin of the University of California at Berkeley in collaboration with researchers at Ohio State University. The team published their findings in the journal Science Advances on September 7th and presented the device. 
“You can use these NV centers as very powerful sensors, but traditionally their applications have been limited because they require a lot of power to read them,†Labanowski said.
In order to detect magnetic fields, scientists must first use high-power microwave radiation to hit the NV center, which is equivalent to about one percent of the standard microwave power, or 10 times the power consumption of a typical mobile phone. They then illuminate the NV center with a laser that is absorbed and emitted by the nitrogen atoms. The strength of the magnetic field is related to the intensity of the emitted laser: the intensity of the emitted light can be used to measure the field strength.
To make the device, the researchers placed nanodiamond crystals (each containing thousands of NV centers) on a film called multiferroic, a new material that delivers microwave energy to the crystal more efficiently.
“This technology greatly reduces the power consumption of the sensor, making it practical for use,†Labanowski explains in vivo and underground imaging.
“With a low-power NV sensor, you can imagine using a room-sized magneto-optical machine and turning it into a helmet-like thing that can greatly reduce size and cost,†Labanowski said.
This sensor can also be placed in an airplane or drone to help find rare earth metals in the ground or for mobile phones to improve navigation.
Salahuddin said, "Magnetic field detection is only one application of the NV center. Although we emphasize magnetic field induction, our work may lead to the electronic operation of quantum systems, which has a wider range of applications, including quantum computing." The team is currently planning to improve their Technology to use NV centers and other types of quantum systems in a variety of applications.
The co-author of the paper is V. Praveen Bhallamudi, Qiaochi Guo, Carola M. Purser and Brendan A. McCullian of the Department of Physics at Ohio State University.
Abstract Recently, engineers at the University of California at Berkeley invented a device that greatly reduces the amount of energy required to power a magnetic field detector. This device is expected to revolutionize how we measure the magnetic fields flowing through electronic devices, the Earth, and even the human body. By the University of California at Berkeley...