Measurement of accreted helium ion velocity using Doppler spectroscopy in the CTIX compact-toroid plasma accelerator

2D imaging of helium ion velocity in the DIII-D divertor

Physics of Plasmas ◽

10.1063/1.5017999 ◽

2018 ◽

Vol 25 (5) ◽

pp. 056110 ◽

Cited By ~ 10

Author(s):

C. M. Samuell ◽

G. D. Porter ◽

W. H. Meyer ◽

T. D. Rognlien ◽

S. L. Allen ◽

...

Keyword(s):

Helium Ion ◽

2D Imaging ◽

Ion Velocity

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Design and Operation of a Passively Switched Repetitive Compact Toroid Plasma Accelerator

Fusion Technology ◽

10.13182/fst98-a31 ◽

1998 ◽

Vol 33 (3) ◽

pp. 252-272 ◽

Cited By ~ 29

Author(s):

Harry S. McLean ◽

David Q. Hwang ◽

Robert D. Horton ◽

Russell W. Evans ◽

Stephen D. Terry ◽

...

Keyword(s):

Plasma Accelerator ◽

Compact Toroid

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Experimental Investigation of Ion Mass Dependency of Magnetic Reconnection Outflow by using High Precision Ion Doppler Spectroscopy

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms.134.352 ◽

2014 ◽

Vol 134 (5) ◽

pp. 352-353

Author(s):

Hirotaka Oka ◽

Hiroshi Tanabe ◽

Masanobu Annoura ◽

Michiaki Inomoto ◽

Yasushi Ono

Keyword(s):

Experimental Investigation ◽

Magnetic Reconnection ◽

High Precision ◽

Doppler Spectroscopy

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Magnetization dynamics of irradiation-fabricated perpendicularly magnetized dots inside a softer magnetic matrix

MRS Proceedings ◽

10.1557/proc-777-t6.4 ◽

2003 ◽

Vol 777 ◽

Cited By ~ 2

Author(s):

T. Devolder ◽

M. Belmeguenai ◽

C. Chappert ◽

H. Bernas ◽

Y. Suzuki

Keyword(s):

Domain Wall ◽

Magnetic Anisotropy ◽

Magnetization Reversal ◽

Ion Irradiation ◽

Magnetic Nanostructures ◽

Magnetic Storage ◽

Exchange Field ◽

Static Magnetization ◽

Specific Domain ◽

Helium Ion

AbstractGlobal Helium ion irradiation can tune the magnetic properties of thin films, notably their magneto-crystalline anisotropy. Helium ion irradiation through nanofabricated masks can been used to produce sub-micron planar magnetic nanostructures of various types. Among these, perpendicularly magnetized dots in a matrix of weaker magnetic anisotropy are of special interest because their quasi-static magnetization reversal is nucleation-free and proceeds by a very specific domain wall injection from the magnetically “soft” matrix, which acts as a domain wall reservoir for the “hard” dot. This guarantees a remarkably weak coercivity dispersion. This new type of irradiation-fabricated magnetic device can also be designed to achieve high magnetic switching speeds, typically below 100 ps at a moderate applied field cost. The speed is obtained through the use of a very high effective magnetic field, and high resulting precession frequencies. During magnetization reversal, the effective field incorporates a significant exchange field, storing energy in the form of a domain wall surrounding a high magnetic anisotropy nanostructure's region of interest. The exchange field accelerates the reversal and lowers the cost in reversal field. Promising applications to magnetic storage are anticipated.

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