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論文

Fast magnetic-field annihilation in the relativistic collisionless regime driven by two ultrashort high-intensity laser pulses

Gu, Y. J.*; Klimo, O.*; Kumar, D.*; Liu, Y.*; Singh, S. K.*; Esirkepov, T. Z.; Bulanov, S. V.; Weber, S.*; Korn, G.*

Physical Review E, 93(1), p.013203_1 - 013203_6, 2016/01

AA2015-0783.pdf:3.92MB

 被引用回数:23 パーセンタイル:90.51(Physics, Fluids & Plasmas)

The magnetic quadrupole structure formation during the interaction of two ultrashort high power laser pulses with a collisionless plasma is demonstrated with 2.5-dimensional particle-in-cell simulations. The subsequent expansion of the quadrupole is accompanied by magnetic-field annihilation in the ultrarelativistic regime, when the magnetic field cannot be sustained by the plasma current.

論文

Evolution of laser induced electromagnetic postsolitons in multi-species plasma

Liu, Y.*; Klimo, O.*; Esirkepov, T. Z.; Bulanov, S. V.; Gu, Y.*; Weber, S.*; Korn, G.*

Physics of Plasmas, 22(11), p.112302_1 - 112302_8, 2015/11

AA2015-0755.pdf:5.0MB

 被引用回数:1 パーセンタイル:5.81(Physics, Fluids & Plasmas)

Using particle-in-cell computer simulations we have studied the electromagnetic relativistic soliton formation in the underdense multi-species plasmas irradiated by high power laser radiation. It has been shown that in a multi-species plasma the light ion acceleration is quite efficient.

論文

Fast magnetic field annihilation driven by two laser pulses in underdense plasma

Gu, Y. J.*; Klimo, O.*; Kumar, D.*; Bulanov, S. V.; Esirkepov, T. Z.; Weber, S.*; Korn, G.*

Physics of Plasmas, 22(10), p.103113_1 - 103113_9, 2015/10

AA2015-0547.pdf:4.08MB

 被引用回数:6 パーセンタイル:35.74(Physics, Fluids & Plasmas)

The magnetic field generated by the laser pulses annihilates in a current sheet formed between the pulses. Magnetic field energy is converted to an inductive longitudinal electric field, which efficiently accelerates the electrons of the current sheet. This new regime of collision less relativistic magnetic field annihilation with a timescale of tens of femtoseconds can be extended to near-critical and overdense plasma with the ultra-high intensity femtosecond laser pulses.

論文

Attractors and chaos of electron dynamics in electromagnetic standing waves

Esirkepov, T. Z.; Bulanov, S. S.*; Koga, J. K.; 神門 正城; 近藤 公伯; Rosanov, N. N.*; Korn, G.*; Bulanov, S. V.

Physics Letters A, 379(36), p.2044 - 2054, 2015/09

 被引用回数:38 パーセンタイル:89.4(Physics, Multidisciplinary)

In an electromagnetic standing wave formed by two super-intense colliding laser pulses, radiation reaction totally modifies the electron motion. The quantum corrections to the electron motion and the radiation reaction force can be independently small or large, depending on the laser intensity and wavelength, thus dividing the parameter space into 4 domains. The electron motion evolves to limit cycles and strange attractors when radiation reaction dominates. This creates a new framework for high energy physics experiments on the interaction of energetic charged particle beams and colliding super-intense laser pulses.

論文

Helium-3 and Helium-4 acceleration by high power laser pulses for hadron therapy

Bulanov, S. S.*; Esarey, E.*; Schroeder, C. B.*; Leemans, W.*; Bulanov, S. V.; Margarone, D.*; Korn, G.*; Haberer, T.*

Physical Review Special Topics; Accelerators and Beams, 18(6), p.061302_1 - 061302_6, 2015/06

AA2015-0189.pdf:0.52MB

 被引用回数:20 パーセンタイル:84.02(Physics, Nuclear)

We show that He$$^{3}$$ ions, having almost the same penetration depth as He$$^{4}$$ with the same energy per nucleon, require less laser power to be accelerated to the required energy for the hadron therapy.

論文

On the problems of relativistic laboratory astrophysics and fundamental physics with super powerful lasers

Bulanov, S. V.; Esirkepov, T. Z.; 神門 正城; Koga, J. K.; 近藤 公伯; Korn, G.*

Plasma Physics Reports, 41(1), p.1 - 51, 2015/01

 被引用回数:76 パーセンタイル:98.88(Physics, Fluids & Plasmas)

We discuss the ways towards modelling of astrophysical processes and extreme field regimes with superpower lasers. This will enable modelling under terrestrial laboratory conditions the processes in astrophysical objects and paves the way to experimental verifications using ultra intense lasers.

論文

Laser ion acceleration for hadron therapy

Bulanov, S. V.; Wilkens, J. J.*; Esirkepov, T. Z.; Korn, G.*; Kraft, G.*; Kraft, S. D.*; Molls, M.*; Khoroshkov, V. S.*

Physics-Uspekhi, 57(12), p.1149 - 1179, 2014/00

 被引用回数:70 パーセンタイル:83.53(Physics, Multidisciplinary)

The paper examines the prospects of using laser plasma as a source of high-energy ions for the purposes of hadron beam therapy - possibility which is expected not only on theoretical grounds but also on experimental grounds (ions are routinely observed to be accelerated in the interaction of high-power laser radiation with matter). Compared to therapy accelerators like cyclotrons, laser technology is advantageous in that it is more compact and is simpler in delivering ions from the accelerator to the treatment room. Special target designs allow the radiation therapy requirements on ion beam quality to be satisfied.

論文

On extreme field limits in high power laser matter interactions; Radiation dominant regimes in high intensity electromagnetic wave interaction with electrons

Bulanov, S. V.; Esirkepov, T. Z.; 神門 正城; Koga, J. K.; 中村 龍史; Bulanov, S. S.*; Zhidkov, A.*; 加藤 義章; Korn, G.*

High-Power, High-Energy, and High-Intensity Laser Technology; and Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers (Proceedings of SPIE, Vol.8780), p.878015_1 - 878015_15, 2013/05

 被引用回数:8 パーセンタイル:96.51

We discuss the key important regimes of electromagnetic field interaction with charged particles. The main attention is paid to nonlinear Thomson/Compton scattering regime with the radiation friction and quantum electrodynamics effects taking into account. This process opens a channel of high efficiency electromagnetic energy conversion into the hard electromagnetic radiation in the form of ultra short high power $$gamma$$ ray flashes.

論文

On the design of experiments to study extreme field limits

Bulanov, S. S.*; Chen, M.*; Schroeder, C. B.*; Esarey, E.*; Leemans, W. P.*; Bulanov, S. V.; Esirkepov, T. Z.; 神門 正城; Koga, J. K.; Zhidkov, A. G.*; et al.

AIP Conference Proceedings 1507, p.825 - 830, 2012/12

 被引用回数:7 パーセンタイル:92.01

We propose the experiments on the collision of intense laser pulses with energetic electron bunches and on the collision of two or more intense laser pulses for studying extreme field limits in the nonlinear interaction of electromagnetic waves. The regimes of dominant radiation reaction, which completely changes the electromagnetic wave matter interaction, will be revealed in such experiments. This will result in a new powerful source of ultra short high brightness $$gamma$$-ray pulses. A possibility of the demonstration of the electron positron pair creation from vacuum in the collision of two or more intense laser pulses is discussed.

論文

Extreme field limits in the interaction of laser light with ultrarelativistic electrons

Bulanov, S. V.; Esirkepov, T. Z.; 林 由紀雄; 神門 正城; 桐山 博光; Koga, J. K.; 近藤 公伯; 小瀧 秀行; Pirozhkov, A. S.; Bulanov, S. S.*; et al.

AIP Conference Proceedings 1465, p.87 - 96, 2012/07

 被引用回数:1 パーセンタイル:49.39

In the experiments on the collision of laser light and high intensity electromagnetic pulses generated by relativistic flying mirrors, with electron bunches produced by a conventional accelerator and with laser wake field accelerated electrons the studying of extreme field limits in the nonlinear interaction of electromagnetic waves is proposed. The regimes of dominant radiation reaction, which completely changes the electromagnetic wave-matter interaction, will be revealed. This will result in a new powerful source of high brightness $$gamma$$-rays. A possibility of the demonstration of the electron-positron pair creation in vacuum in a multi-photon processes can be realized. This will allow modeling under terrestrial laboratory conditions neutron star magnetospheres, cosmological $$gamma$$ ray bursts and the Leptonic Era of the Universe.

論文

High-power $$gamma$$-ray flash generation in ultraintense laser-plasma interactions

中村 龍史; Koga, J. K.; Esirkepov, T. Z.; 神門 正城; Korn, G.*; Bulanov, S. V.

Physical Review Letters, 108(19), p.195001_1 - 195001_5, 2012/05

 被引用回数:147 パーセンタイル:97.57(Physics, Multidisciplinary)

レーザー強度が放射反作用が支配的となる領域に入ると、放射反作用を介したエネルギーロスは高出力$$gamma$$線フラッシュを発生する新しい機構と考えることができる。発生する$$gamma$$線のパルス長や発散角はレーザー強度とターゲットのスケール長により決定される。放射反作用を考慮した理論解析と粒子シミュレーション解析により、固体密度プラズマからの$$gamma$$線フラッシュの発生に対する最適な条件を明らかにした。

論文

On the design of experiments for the study of extreme field limits in the interaction of laser with ultrarelativistic electron beam

Bulanov, S. V.; Esirkepov, T. Z.; 林 由紀雄; 神門 正城; 桐山 博光; Koga, J. K.; 近藤 公伯; 小瀧 秀行; Pirozhkov, A. S.; Bulanov, S. S.*; et al.

Nuclear Instruments and Methods in Physics Research A, 660(1), p.31 - 42, 2011/12

 被引用回数:61 パーセンタイル:98.33(Instruments & Instrumentation)

We propose the experiments on the collision of laser light and high intensity electromagnetic pulses generated by relativistic flying mirrors, with electron bunches produced by a conventional accelerator and with laser wake field accelerated electrons for studying extreme field limits in the nonlinear interaction of electromagnetic waves.

論文

Extreme field science

Bulanov, S. V.; Esirkepov, T. Z.; 林 由紀雄; 神門 正城; 桐山 博光; Koga, J. K.; 近藤 公伯; 小瀧 秀行; Pirozhkov, A. S.; Bulanov, S. S.*; et al.

Plasma Physics and Controlled Fusion, 53(12), p.124025_1 - 124025_13, 2011/12

 被引用回数:5 パーセンタイル:26.23(Physics, Fluids & Plasmas)

We discuss the progress in the development of the extreme light sources that will open new horizons for studying a wide range of the fundamental science and astrophysics problems. The regimes of dominant radiation reaction, which completely change the electromagnetic wave-matter interaction, will be revealed, resulting in a new extremely powerful source of ultra short high brightness $$gamma$$-ray pulses. The possibility of abundant electron-positron pair creation via the multi-photon processes, and possibility of reaching the critical field of quantum electrodynamics which would lead to the vacuum polarization and breakdown, are attracting high attention.

論文

Extreme field science

Bulanov, S. V.; Esirkepov, T. Z.; 林 由紀雄; 神門 正城; 桐山 博光; Koga, J. K.; 近藤 公伯; 小瀧 秀行; Pirozhkov, A. S.; Bulanov, S. S.*; et al.

Plasma Physics and Controlled Fusion, 53(12), p.124025_1 - 124025_13, 2011/11

The review is devoted to discussing progress in the development of the extreme light sources that opens new horizons for studying of a wide range of the fundamental science problems and important applications.

論文

Phase-locked ions and foil transparency in the radiation pressure acceleration regime

Pegoraro, F.*; Bulanov, S. V.; Esirkepov, T. Z.; 神門 正城; Echkina, E.*; Inovenkov, I. N.*; Korn, G.*

Nuclear Instruments and Methods in Physics Research A, 653(1), p.153 - 155, 2011/10

The transverse expansion of a thin foil accelerated in the RPDA regime can be exploited in order to increase the ion energy and the acceleration efficiency at the expense of decreasing the number of accelerated particles. In the relativistic regime, the ions become phase-locked with respect to the electromagnetic wave. The use of an optimal laser pulse shape makes it possible to keep the expanding foil opaque to the laser radiation. This provides a new approach in order to enhance the energy of laser accelerated ions significantly.

論文

Phase-locked ions and foil transparency in the radiation pressure acceleration regime

Pegoraro, F.*; Bulanov, S. V.; Esirkepov, T. Z.; 神門 正城; Echkina, E. Yu.*; Inovenkov, I. N.*; Korn, G.*

Nuclear Instruments and Methods in Physics Research A, 653(1), p.153 - 155, 2010/10

 被引用回数:1 パーセンタイル:12.7(Instruments & Instrumentation)

The transverse expansion of a thin foil accelerated in the RPDA regime can be exploited in order to increase the ion energy and the acceleration efficiency at the expense of decreasing the number of accelerated particles. In the relativistic regime, the ions become phase-locked with respect to the electromagnetic wave.

論文

Unlimited energy gain in the laser-driven radiation pressure dominant acceleration of ions

Bulanov, S. V.; Echkina, E. Yu.*; Esirkepov, T. Z.; Inovenkov, I. N.*; 神門 正城; Pegoraro, F.*; Korn, G.*

Physics of Plasmas, 17(6), p.063102_1 - 063102_12, 2010/06

 被引用回数:33 パーセンタイル:80.8(Physics, Fluids & Plasmas)

The energy of the ions accelerated by an intense electromagnetic wave in the radiation pressure dominated regime can be greatly enhanced by a transverse expansion of a thin target. The expansion decreases the number of accelerated ions in the irradiated region increasing the energy and the longitudinal velocity of the remaining ions. In the relativistic limit, the ions become phase-locked with respect to the electromagnetic wave resulting in an unlimited ion energy gain. This effect and the use of optimal laser pulse shape provide a new approach for great enhancing the energy of laser accelerated ions.

論文

Unlimited ion acceleration by radiation pressure

Bulanov, S. V.; Echkina, E. Yu.*; Esirkepov, T. Z.; Inovenkov, I. N.*; 神門 正城; Pegoraro, F.*; Korn, G.*

Physical Review Letters, 104(13), p.135003_1 - 135003_4, 2010/04

 被引用回数:130 パーセンタイル:96.11(Physics, Multidisciplinary)

The energy of ions accelerated by an intense electromagnetic wave in the radiation pressure dominated regime can be greatly enhanced due to a transverse expansion of a thin target. The expansion decreases the number of accelerated ions in the irradiated region resulting in an increase in the ion energy and in the ion longitudinal velocity. In the relativistic limit, the ions become phase locked with respect to the electromagnetic wave resulting in unlimited ion energy gain.

口頭

超高出力レーザープラズマからの$$gamma$$線発生

中村 龍史; Koga, J. K.; Esirkepov, T. Z.; 神門 正城; Korn, G.*; Bulanov, S. V.

no journal, , 

放射反作用は加速度運動する荷電粒子からの放射に対する反作用の効果で、レーザー場中の電子においては位相の遅れと、それによるエネルギー散逸を引き起こす。固体ターゲットとレーザーとの相互作用の場合、レーザーにより加速された電子とレーザー場が十分長い時間相互作用することで、放射反作用によるエネルギー散逸が強くなることが予想され、その結果効果的な$$gamma$$線発生が実現する可能性がある。粒子シミュレーションによると、エネルギー300J, 出力10PW, 集光強度が$$5times10^{22}$$W/cm$$^2$$のレーザーを固体薄膜に照射した場合、最適な条件下ではおよそ30%のレーザーエネルギーが$$gamma$$線に変換されることがわかった。この$$gamma$$線は照射レーザーと同等の短パルス性を持ち、そのためペタワット級の超高出力$$gamma$$線となる。また指向性,偏光性といった特徴も有している。このような高出力$$gamma$$線は他の発生機構では得られないものである。レーザー駆動の新しい$$gamma$$線源の可能性について議論する。

口頭

High power $$gamma$$-ray source from laser irradiated solid target

中村 龍史; Koga, J. K.; Esirkepov, T. Z.; 神門 正城; Korn, G.*; Bulanov, S. V.

no journal, , 

超高強度レーザーを使った新しい出力$$gamma$$線源の提案を行った。集光強度がおよそ10$$^{22}$$W/cm$$^2$$程度をこえる高強度レーザーを物質に照射すると加速された電子運動において放射反作用の効果が無視できなくなる。このとき、放射反作用により減速された電子のエネルギーは$$gamma$$線領域の光子エネルギーに変換される。特に、超高出力,超短パルス,高い指向性といった特徴を持つ$$gamma$$線が発生することを明らかにし、新しいレーザー駆動$$gamma$$線源として提案を行った。

口頭

Laser-driven $$gamma$$-ray source via radiation reaction effect

中村 龍史; Koga, J. K.; Esirkepov, T. Z.; 神門 正城; Korn, G.*; Bulanov, S. V.

no journal, , 

ペタワットを超えるレーザーと物質との相互作用では、電子運動における放射反作用の効果が無視できなくなる。放射反作用効果は、電子エネルギーの散逸を引き起こしそれが$$gamma$$線領域の光として放出される。このような$$gamma$$線の特性を解明するため、粒子コードに放射反作用効果を取り込み解析を行った。その結果、パラメータを適切に選ぶことで、短パスルかつ指向性を持った$$gamma$$線が発生できることが明らかとなった。光子数,パルス長等の特性を制御可能であることを示し、レーザー駆動$$gamma$$線源の提案を行った。

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