To detect such a tiny force, the NIST team confined about 60 ultra-cold beryllium ions in a device called a Penning trap, which USES magnetic and electric fields to imprison charged particles.

为了测出如此微小的力，国家标准和技术学会的团队将大约60个超冷铍离子装在一个叫做“潘宁陷阱”的装置中，该装置是利用磁场和电场禁锢带电粒子的。

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A particle in cell code has been developed to simulate the steady state of electron plasmas in an electron beam Penning trap and to study its scaling law.

应用粒子模拟方法研究了电子束潘宁阱中的非中性等离子体的稳定状态及其定标关系。

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