Measurement of magnetic field fluctuations and diamagnetic currents within a laser ablation plasma interacting with an axial magnetic field

Ikeda, S.; Horioka, K.; Okamura, M.

doi:10.1063/1.5006636

Title: Measurement of magnetic field fluctuations and diamagnetic currents within a laser ablation plasma interacting with an axial magnetic field

Journal Article · 10 October 2017 · Journal of Applied Physics

DOI: https://doi.org/10.1063/1.5006636 · OSTI ID:1405929

Ikeda, S. ^[1]; Horioka, K. ^[2]; Okamura, M. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Tokyo Institute of Technology, Kanagawa (Japan)

Here, the guiding of laser ablation plasmas with axial magnetic fields has been used for many applications, since its effectiveness has been proven empirically. For more sophisticated and complicated manipulations of the plasma flow, the behavior of the magnetic field during the interaction and the induced diamagnetic current in the plasma plume needs to be clearly understood. To achieve the first milestone for establishing magnetic plasma manipulation, we measured the spatial and temporal fluctuations of the magnetic field caused by the diamagnetic current. We showed that the small fluctuations of the magnetic field can be detected by using a simple magnetic probe. We observed that the field penetrates to the core of the plasma plume. The diamagnetic current estimated from the magnetic field had temporal and spatial distributions which were confirmed to be correlated with the transformation of the plasma plume. Our results show that the measurement by the magnetic probe is an effective method to observe the temporal and spatial distributions of the magnetic field and diamagnetic current. The systematic measurement of the magnetic field variations is a valuable method to establish the magnetic field manipulation of the laser ablation plasma.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: SC0012704

OSTI ID:: 1405929

Alternate ID(s):: OSTI ID: 1398822

Report Number(s):: BNL-114416-2017-JA; R&D Project: KBCH139; 18033; KB0202011; TRN: US1703028

Journal Information:: Journal of Applied Physics, Vol. 122, Issue 14; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 1 work

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