Characterization of preformed plasmas with an interferometer for ultra-short high-intensity laser-plasma interactions

Sagisaka, A.; Daido, Hiroyuki; Ogura, Koichi; Orimo, Satoshi; Hayashi, Yukio; Nishiuchi, Mamiko; Mori, M.; Matsukado, Koji; Fukumi, Atsushi; Li, Z.; Nakamura, Sadao; Takagaki, Katsuhiko; Hazama, Hisanao; Suzuki, Masayuki; Utsumi, Takayuki; Bulanov, Sergei V.; Esirkepov, T. Zh.

doi:10.1007/s00340-004-1447-0

Cited by 25 publications

(21 citation statements)

References 15 publications

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“…The preceding light can damage the target and create the preformed plasma well before the main pulse. To understand the influence of the preformed plasma on the proton acceleration, we employed the time-resolved interferometry using the femtosecond probe pulse (Sagisaka et al 2004;Sagisaka et al 2006). Fig.…”

Section: Results Of Proton Accelerationmentioning

confidence: 99%

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Laser-Driven Proton Acceleration Research and Development

Pirozhkov¹,

Daido²,

Nishiuchi³

2010

Advances in Solid State Lasers Development and Applications

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Section: Results Of Proton Accelerationmentioning

confidence: 99%

“…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%

Laser-Driven Proton Acceleration Research and Development

Pirozhkov¹,

Daido²,

Nishiuchi³

2010

Advances in Solid State Lasers Development and Applications

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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%

“…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%

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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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High energy proton beam from a laser irradiated thin-foil target and its possible applications

Nishiuchi¹,

Fukumi²,

Daido³

et al. 2006

Laser Phys. Lett.

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In this paper, we present the motivation and future prospects of the laser-driven proton generation and its application to the medical accelerators. Then we present the experimental results of the high energy proton beam produced by a Ta 3 µm target irradiated with a 3 × 10 18 W cm −2 , ∼70 fs pulse laser. The measured proton spectra can be divided into three parts; lowenergy, high-energy, and cut-off. We propose the possible acceleration mechanism which describes our data, and the resultant problems which we should solve to reach our objectives. Vertical axis, µmHorizontal axis, µm 150

show abstract

Characterization of preformed plasmas with an interferometer for ultra-short high-intensity laser-plasma interactions

Cited by 25 publications

References 15 publications

Laser-Driven Proton Acceleration Research and Development

Laser-Driven Proton Acceleration Research and Development

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

High energy proton beam from a laser irradiated thin-foil target and its possible applications

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