High-speed 2-D image measurement for plasma-wall interaction studies

Nishino, Norikazu; Takahashi, K.; Kawazome, H.; Fukagawa, Y.; Mizuuchi, T.; Kondo, K.; Sano, F.; Nagasaki, K.; Okada, H.; Kobayahi, S.; Yamamoto, Satoshi

doi:10.1016/j.jnucmat.2004.10.026

Cited by 23 publications

(20 citation statements)

References 15 publications

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“…While high-end digital cameras [i.e., charge-coupled device (CCD) and complementary metal-oxide-semiconductor (CMOS) cameras] are now able to perform imaging at a speed approaching 1 million frames∕s (17)(18)(19), they are not well suited for highthroughput microscopy. First, a critical limitation that hampers imaging of particles flowing at high speeds is the relatively long shutter speed or exposure time (≥1 μs) (17)(18)(19) that results in motion blur and loss of resolution during the high-speed flow, hence degrading specificity.…”

mentioning

confidence: 99%

“…First, a critical limitation that hampers imaging of particles flowing at high speeds is the relatively long shutter speed or exposure time (≥1 μs) (17)(18)(19) that results in motion blur and loss of resolution during the high-speed flow, hence degrading specificity. Another limitation is the time needed to download the image from the array of thousands of pixels.…”

mentioning

confidence: 99%

“…Another limitation is the time needed to download the image from the array of thousands of pixels. To achieve high frame rates, the number of pixels that are employed must be reduced in a process known as partial readout (17)(18)(19)(20)(21). The penalty is that image resolution is lost at high frame rates.…”

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confidence: 99%

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High-throughput single-microparticle imaging flow analyzer

Goda

Ayazi

Gossett

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

344

242

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Optical microscopy is one of the most widely used diagnostic methods in scientific, industrial, and biomedical applications. However, while useful for detailed examination of a small number (< 10,000) of microscopic entities, conventional optical microscopy is incapable of statistically relevant screening of large populations (> 100,000,000) with high precision due to its low throughput and limited digital memory size. We present an automated flow-through single-particle optical microscope that overcomes this limitation by performing sensitive blur-free image acquisition and nonstop real-time image-recording and classification of microparticles during high-speed flow. This is made possible by integrating ultrafast optical imaging technology, self-focusing microfluidic technology, optoelectronic communication technology, and information technology. To show the system’s utility, we demonstrate high-throughput image-based screening of budding yeast and rare breast cancer cells in blood with an unprecedented throughput of 100,000 particles/s and a record false positive rate of one in a million.

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High-throughput single-microparticle imaging flow analyzer

Goda

Ayazi

Gossett

et al. 2012

Proc. Natl. Acad. Sci. U.S.A.

344

242

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show abstract

“…Recently, development of the performance in high-speed cameras enables us to effective means to analyze the 2-D imaging of the plasma behavior in detail. Therefore the 2-D imaging diagnostics with the high-speed camera has been employed in many fusion plasma devises [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Plasma Imaging by Using a High-speed Camera in the GAMMA 10 Tandem Mirror

Yonenaga

Nakashima

Nishino

et al. 2010

Plasma and Fusion Research

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The two-dimensional (2-D) image of high temperature plasmas in the GAMMA 10 tandem mirror has been measured at the central-cell by using a high-speed camera. Temporal behavior of visible image in the centralcell was observed with high-speed camera in the experiment of antenna optimization of central-ECRH system. Observed results showed a significant dependence on the position of the central-ECRH antenna. We discuss the characteristics of the fluctuation in the light emission intensity and the correlation with the radial distribution of electron density in the period of ECRH.

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“…2-D image measurements have been successfully demonstrated in many fusion experimental devices around the world with the development of camera performance [1][2][3]. 2-D image of plasma behavior also gives us a lot of useful information for controlling the plasma position and understanding the plasma response on plasma heating systems.…”

Section: Introductionmentioning

confidence: 99%

Development of the Monitoring System of Plasma Behavior Using a CCD Camera in the GAMMA 10 Tandem Mirror

Kawano

Nakashima

Higashizono

et al. 2007

Plasma and Fusion Research

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In the central-cell of the GAMMA 10 tandem mirror, a medium-speed camera (CCD camera, 400 frames per second, 216 × 640 pixel) has been installed for the observation of plasma behavior. This camera system is designed for monitoring the plasma position and movement in the whole discharge duration. The captured twodimensional (2-D) images are automatically displayed just after the plasma shot and stored sequentially shot by shot. This system has been established as a helpful tool for optimizing the plasma production and heating systems by measuring the plasma behavior in several experimental conditions. The camera system shows that the intensity of the visible light emission on the central-cell limiter accompanied by central electron cyclotron heating (C-ECH) correlate with the wall conditioning and immersion length of a movable limiter (iris limiter) in the central cell.

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High-speed 2-D image measurement for plasma-wall interaction studies

Cited by 23 publications

References 15 publications

High-throughput single-microparticle imaging flow analyzer

High-throughput single-microparticle imaging flow analyzer

Plasma Imaging by Using a High-speed Camera in the GAMMA 10 Tandem Mirror

Development of the Monitoring System of Plasma Behavior Using a CCD Camera in the GAMMA 10 Tandem Mirror

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