Antiproton cloud compression in the ALPHA apparatus at CERN

Antiproton cloud compression in the ALPHA apparatus at CERN
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CERN ALPHA 装置中的反质子云压缩

DOI:
10.1007/s10751-015-1202-4
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发表时间:
2015
影响因子:
--
通讯作者:
Gutierrez A
Gutierrez A
中科院分区:
--
文献类型:
--
作者:
Gutierrez A

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我们已经观察到一种新的机制,用于压缩的非中性等离子体,其中嵌入在电子等离子体中的反质子被压缩的旋转壁驱动器的频率接近的总和的轴向反弹和旋转频率。反质子云的半径减少了20倍,测得的最小半径为10.2 mm。当旋转壁驱动器应用于纯电子或纯反质子等离子体时,在感兴趣的频率范围内没有观察到压缩。压缩明显的频率范围与反质子反弹频率和系统旋转频率之和进行比较。有人建议,反弹共振输运是一个可能的解释,在这个制度的反质子云的压缩。
We have observed a new mechanism for compression of a non-neutral plasma, where antiprotons embedded in an electron plasma are compressed by a rotating wall drive at a frequency close to the sum of the axial bounce and rotation frequencies. The radius of the antiproton cloud is reduced by up to a factor of 20 and the smallest radius measured is ∼0.2 mm. When the rotating wall drive is applied to either a pure electron or pure antiproton plasma, no compression is observed in the frequency range of interest. The frequency range over which compression is evident is compared to the sum of the antiproton bounce frequency and the system’s rotation frequency. It is suggested that bounce resonant transport is a likely explanation for the compression of antiproton clouds in this regime.
DOI: 10.1016/0020-7381(75)87031-8
发表时间: 1975-03
期刊: International Journal of Mass Spectrometry and Ion Physics
影响因子: --
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