Development of a two-color interferometer for observing wide range electron density profiles with a femtosecond time resolution

Sagisaka, A.; Pirozhkov, Alexander S.; Daido, Hiroyuki; Fukumi, Atsushi; Li, Z.; Yogo, Akifumi; Oishi, Yuji; Nayuki, Takuya; Fujii, Takashi; Nemoto, Koshichi; Orimo, Satoshi; Nishiuchi, Mamiko; Hayashi, Yukio; Mori, M.; Kado, M.; Nakamura, Shu; Noda, Akira; Choi, Il Woo; Sung, Jae Hee; Ko, Do‐Kyeong; Lee, J.

doi:10.1007/s00340-006-2318-7

Cited by 29 publications

(26 citation statements)

References 28 publications

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“…To achieve higher spatial resolution, it would be necessary to decrease the pixel size or to increase the magniˆcation of the pinhole camera. Figure 6 shows the target surface positions observed using a two-color interferometer [19][20] . For comparison, the open circles show data for the shadow of the tape target obtained using the two-color interferometer 20) .…”

Section: Resultsmentioning

confidence: 99%

“…Figure 6 shows the target surface positions observed using a two-color interferometer [19][20] . For comparison, the open circles show data for the shadow of the tape target obtained using the two-color interferometer 20) . The data are plotted such that the average value is zero.…”

Section: Resultsmentioning

confidence: 99%

“…One motor has a torque controller, and the other motor winds the tape target. The tape target, made of tantalum, has a width of 5 mm and a thickness of 3 mm 4,[19][20] . The front surface of the tape target is set at the laser focusing position.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…The probe beam crosses the target surface. The shadowgraph of the tape target obtained using the probe beam is monitored by a CCD camera [19][20] . In order to place the target parallel to the probe beam, the width of the shadow of the tape was minimized, with an accuracy of about 1°.…”

Section: Experimental Apparatusmentioning

confidence: 99%

See 3 more Smart Citations

A Novel Technique for Monitoring the Reproducibility of Laser Tape-Target Interactions Using an X-ray Pinhole Camera

Fukumi¹,

Zhong²,

Orimo

et al. 2009

J. Vac. Soc. Jpn.

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For accurately controlling relativistic laser-plasma interactions to achieve repetitive proton generation, it is necessary to measure and control the laser irradiation conditions, such as laser parameters and target shooting accuracy, as well as to measure proton parameters for each laser shot. The displacement of the tape target, which is used in an ultra-short Ti: sapphire laser system to generate high-energy protons, is measured by capturing X-ray images of the laser plasma for each laser shot using an X-ray pinhole camera. This method allows the displacement of the target to be measured with a precision of 10 mm. The precision is high enough for present-day laser focusing systems with an F-number of 3.6 ( f＝179 mm). Thus, the proposed technique contributes to accurate control of repetitive laser-driven proton generation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Experimental Apparatusmentioning

confidence: 99%

Section: Experimental Apparatusmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Technique for Monitoring the Reproducibility of Laser Tape-Target Interactions Using an X-ray Pinhole Camera

Fukumi¹,

Zhong²,

Orimo

et al. 2009

J. Vac. Soc. Jpn.

View full text Add to dashboard Cite

show abstract

“…The probe beam split by a pellicle from the main pulse was used for shadowgraphy at 820 nm and interferometry at 820 and 410 nm (2ω) (Sagisaka et al 2004;Sagisaka et al 2006). To measure the laser energy reflected from and transmitted through the target, we used invacuum calorimeters.…”

Section: Introductionmentioning

confidence: 99%