Yao Chen Xi’an Jiaotong University atomic magnetometer - 陈 瑶
Micro-machined alkali vapor cells
We have utilized the micro-machined technology to fabricate vapor cells. These cells has very small dimensions and they could be utilized in the chip-scale atomic magnetometer and gyroscopes.
Cs-Ne atomic magnetometer sensitivity
Now we have build a Cs-Ne Atomic magnetometer and the sensitivity has reached 40fT/Hz^(1/2). In very small alkali vapor cells, the relaxation of wall collision could not be neglected. Traditionally, the nitrogen gas is utilized which owns a very large alkali metal gas spin destruction relaxation. In our experiment, we use neon gas as the buffer gas for wall relaxation reduction.
Nuclear quadrupolar relaxation of Xe131
It is intresting to study the relaxation of 131Xe when collision with silicon surface. In micro-machined gyroscope, the silicon material is usually utilized, the collision of 131Xe with silicon surface could both induce relaxation and frequency shifts. The quadopolar interaction study is thus meaningful and could help to improve the bias stability.
The system for expensive isotope enriched gas recycling
We construced a system for the gas recycling. The noble gases are very expensive and it is very meaningful to do recycling when you fabricate a chip-scale alkali vapor cell. The anode bonding chamber is very large and could waste a lot of expensive gas. We use liquid nitrogen for gas recycling.