Standard

Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror. / Nayuki, Takuya; Fujii, Takashi; Oishi, Yuji; Takano, Kei; Wang, Xiaofang; Andreev, Alexander A.; Nemoto, Koshichi; Ueda, Ken Ichi.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 6018, 60180F, 2005.

Research output: Contribution to journal › Conference article › peer-review

Harvard

Nayuki, T, Fujii, T, Oishi, Y, Takano, K, Wang, X, Andreev, AA, Nemoto, K & Ueda, KI 2005, 'Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror', Proceedings of SPIE - The International Society for Optical Engineering, vol. 6018, 60180F. https://doi.org/10.1117/12.669278

APA

Nayuki, T., Fujii, T., Oishi, Y., Takano, K., Wang, X., Andreev, A. A., Nemoto, K., & Ueda, K. I. (2005). Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror. Proceedings of SPIE - The International Society for Optical Engineering, 6018, [60180F]. https://doi.org/10.1117/12.669278

Vancouver

Nayuki T, Fujii T, Oishi Y, Takano K, Wang X, Andreev AA et al. Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror. Proceedings of SPIE - The International Society for Optical Engineering. 2005;6018. 60180F. https://doi.org/10.1117/12.669278

Author

Nayuki, Takuya ; Fujii, Takashi ; Oishi, Yuji ; Takano, Kei ; Wang, Xiaofang ; Andreev, Alexander A. ; Nemoto, Koshichi ; Ueda, Ken Ichi. / Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror. In: Proceedings of SPIE - The International Society for Optical Engineering. 2005 ; Vol. 6018.

BibTeX

@article{3e04cca7639949dbacafa96c5f47068a,
title = "Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror",
abstract = "The generation of energetic protons using a polyimide tape of 7.5 μm thickness was carried out with laser pulses of 30 mJ energy and 80 fs duration. A deformable mirror system with a genetic algorithm (GA) was developed to optimize the laser-focusing spot. The fitness values used in the GA were measured from the focusing intensities under the low-gain condition of the power amplifier, or from x-ray in situ signals emitted from the target. Although we obtained a diffraction-limited size of 2 μm (full width at half maximum) using the former value, a precise optimization using the latter value was essential to accelerate protons whose flux was 106/MeV/shot to a maximum energy of 1.1 ± 0.3 MeV with laser pulses of only 30 mJ energy since a laser spot that is too tight may be sensitive to wave-front distortion caused by residual thermal lenses of the power amplifier.",
keywords = "Deformable mirror, Genetic algorithm, Polyimide, Proton acceleration",
author = "Takuya Nayuki and Takashi Fujii and Yuji Oishi and Kei Takano and Xiaofang Wang and Andreev, {Alexander A.} and Koshichi Nemoto and Ueda, {Ken Ichi}",
year = "2005",
doi = "10.1117/12.669278",
language = "English",
volume = "6018",
journal = "Proceedings of SPIE - The International Society for Optical Engineering",
issn = "0277-786X",
publisher = "SPIE",
note = "5th International Workshop on Adaptive Optics for Industry and Medicine ; Conference date: 29-08-2005 Through 01-09-2005",

}

RIS

TY - JOUR

T1 - Generation of MeV proton with 30 mJ laser energy by optimizing focusing spot using deformable mirror

AU - Nayuki, Takuya

AU - Fujii, Takashi

AU - Oishi, Yuji

AU - Takano, Kei

AU - Wang, Xiaofang

AU - Andreev, Alexander A.

AU - Nemoto, Koshichi

AU - Ueda, Ken Ichi

PY - 2005

Y1 - 2005

N2 - The generation of energetic protons using a polyimide tape of 7.5 μm thickness was carried out with laser pulses of 30 mJ energy and 80 fs duration. A deformable mirror system with a genetic algorithm (GA) was developed to optimize the laser-focusing spot. The fitness values used in the GA were measured from the focusing intensities under the low-gain condition of the power amplifier, or from x-ray in situ signals emitted from the target. Although we obtained a diffraction-limited size of 2 μm (full width at half maximum) using the former value, a precise optimization using the latter value was essential to accelerate protons whose flux was 106/MeV/shot to a maximum energy of 1.1 ± 0.3 MeV with laser pulses of only 30 mJ energy since a laser spot that is too tight may be sensitive to wave-front distortion caused by residual thermal lenses of the power amplifier.

AB - The generation of energetic protons using a polyimide tape of 7.5 μm thickness was carried out with laser pulses of 30 mJ energy and 80 fs duration. A deformable mirror system with a genetic algorithm (GA) was developed to optimize the laser-focusing spot. The fitness values used in the GA were measured from the focusing intensities under the low-gain condition of the power amplifier, or from x-ray in situ signals emitted from the target. Although we obtained a diffraction-limited size of 2 μm (full width at half maximum) using the former value, a precise optimization using the latter value was essential to accelerate protons whose flux was 106/MeV/shot to a maximum energy of 1.1 ± 0.3 MeV with laser pulses of only 30 mJ energy since a laser spot that is too tight may be sensitive to wave-front distortion caused by residual thermal lenses of the power amplifier.

KW - Deformable mirror

KW - Genetic algorithm

KW - Polyimide

KW - Proton acceleration

UR - http://www.scopus.com/inward/record.url?scp=33644810599&partnerID=8YFLogxK

U2 - 10.1117/12.669278

DO - 10.1117/12.669278

M3 - Conference article

AN - SCOPUS:33644810599

VL - 6018

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

M1 - 60180F

T2 - 5th International Workshop on Adaptive Optics for Industry and Medicine

Y2 - 29 August 2005 through 1 September 2005

ER -

ID: 85669669