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1 大 型 超 高 強 度 レーザーの 世 界 の 動 向 と レーザーによる 真 空 崩 壊 に 関 する 実 験 提 案 高 部 英 明 大 阪 大 学 レーザーエネルギー 学 研 究 センター 理 学 研 究 科 物 理 学 専 攻 宇 宙 地 球 科 学 専 攻 International Physics Course, Osaka University 大 型 レーザーを 用 いた 新 しい 科 学 研 究 に 関 する 意 見 交 換 会 高 エネルギー 研 究 所 つくば 2010 年 12 月 13 日 ( 世 話 人 : 米 田 仁 紀 ) 1
2 1TeV 1GeV (by G. Mourou) 2
3 PW Class Facilities (Review) 3
4 G. Mourou and ELI EU ELI-modules (10PW) 東 欧 3カ 国 ELI (200PW) Site decision 2012 VALCAN-10PW UK APOLLON-10PW France USA OMEGA-EP (10PW) U of R NIF-ARC (LLNL) Japan GEKKO-EXA (100PW) J-KAREN(1PW) 4
5 EU decided to construct 3 ELI Modules in East Europe (Total cost = 800 M Euro) Site selection: decision on Czech Republic Prague Overall cost: 800M Hungary Szeged Romania Bucharest - Magurele 5
6 Apollon, ILE, Palaiseau, France 10PW: 150 J, 15 fs, 1 shot/min VULCAN 10PW project, CLF, Chilton, UK 10PW: 300J, 30fs, 1 shot/15min Under construction; due by First phase completed; due by Apollon.Fr VULCAN.UK 6
7 OMEGA-EP(UoR, NY) OMEGA OMEGA-EP 7
8 National Ignition Facility (LLNL, CA) 4 Billion USD Laser (192 Beams) 8
9 NIF-ARC (LLNL) 9
10 Proposal to Science on NIF Committee K. Nakashima and H. Takabe, Numerical Study of Positron Energy Spectrum Produced by Ultra-intense Lasers, Phys. Plasmas 9, (2002). Hui Chen, S. C. Wilks et al., Relativistic Quasi-monoenergetic Positron Jets from Intense Laser-Solid Interactions, Phys. Rev. Lett. 105, (2010)
11 2x2 amplifier chains of LFEX laser, OU DA 400S LFEX laser DFM 75 RA 50 SF 400S OS 75S DFM 125 OS 125S GEKKO XII 11
12 GEKKO-EXA: Technical goal GEKKO-XII GEKKO-EXA Colliding laser beam Present Performance: 10 Peta Watt, 30 µm spot, W/cm 2 Reducing Pulse Width Ultra Broadband Amplification 1 ps 10 fs (3 Optical Cycles) Reducing Spot Size Wavefront correction Coherent adding Plasma Mirror 30 µm 1 µm W/cm 2 12
13 Experimental Maximum of Focused Laser Intensity I = 2x10 22 W/cm 2 E = 1.4x10 12 V/cm V. Yanofsky et al., Opt. Express 16, 2109n(2008) 13
14 2. Vacuum Breakdown and Pair Plasma 14
15 Heisenberg s Uncertainty Principle 15
16 16
17 (by G. Dunne) 17
18 Schwinger Limit E-field t ~ 2 ~ mc ee t ~ p ~ mc m 2 c 3 E CR e 18
19 Compton Wavelength and Schwinger Limit (Image of Tunneling) z k ~ mc C ~ z 2 k C 2 mc 1 ~ ~ ee CR k C 19
20 Landau Levels and Schwinger Limit B-field 20
21 Image of Magnetar 21
22 Suzaku Results on Magnetars Following a pioneering study with INTEGRAL (Kuiper+ 06), wide-band magentar studies with Suzaku revealed their unusual spectra extraordinary physical condition Isolated NS Accreting X-ray pulsar 22 (by K. Makishima)
23 Tunneling in Vacuum (WKB calculation) 23
24 I c ~ W/cm 2 ~(Schwinger limit) R. Ruffini et al, Physics Reports 487, (2010) (by G. Dunne) 24
25 25
26 3. Avalanche near W/cm 2 26
27 We follow now Tony Bell s vacuum breakdown by pair avalanche at TITech, Tokyo, February 22, 2007 H. T. Toshio Terasawa (Japan) Jopiky(USA)) Anthony Bell (UK) 27
28 I ~ W/cm 2 ~ 10-5 I SL 28
29 高 部 英 明 編 講 座 : 相 対 論 的 プラズマ 物 理 学 プラズマ 核 融 合 学 会 誌 78(2002) 第 2 章 pp ( 高 部 著 )より g rays g rays 29
30 30
31 We have to take into account ( by H. Ruhl) 31
32 32 (by Nina Elkina, LMU)
33 33
34 (by Nina Elkina, LMU) 34
35 Three-dimensional PIC Simulation (Our Research Direction for EXA-physics) T. N. Kato, ILE Electron Number Density t=200 Settings of Simulation Composition electron, positron Physical Size Grid Size Number of Particles Boundary Condition Background magnetic field Computer particles / species (20 particles / cell / species) Periodic Perpendicular (s=0.003) VPP5000 at NAOJ (32 PE) The simulation parameters are the same as the 2D simulations. 35
36 4. Laser Cosmology with Highly Relativistic Pairs 36
37 Hypernova and Gamma-Ray Burst 37
38 the evaporation of black hole 38
39 5. Schwinger Limit for QCD and Quark-Gulon-Plasmas 39
40 Large Hadron Collider(LHC), CERN 40
41 Cascade must be important in QGP formation ( with Asakawa, OU ) 41
42 Avalanche may be important in QGP formation (by N. Tanji) 42
43 RHICの2 大 検 出 器 PHENIX 検 出 器 STAR 検 出 器 43
44 7. Hawking Radiation and Unruh Radiation 44
45 高 強 度 レーザーで 探 るホライズンの 物 理 - ホーキング 輻 射 とウンルー 効 果 年 4 月 28 研 シンポジウム 高 エネルギー 加 速 器 研 究 機 構 理 論 センター 磯 暁 内 容 1 ホーキング 輻 射 との 類 似 ホライズン( 時 空 の 地 平 面 )による 量 子 効 果 2 三 つのポイントで 理 解 するウンルー 効 果 の 基 礎 3 どうやったら 検 出 可 能 か? 4 ウンルー 輻 射 は 本 当 にあるのか? 5 まとめ Hawking 75 Unruh 76 45
46 3 ウンルー 効 果 の 実 験 的 検 証 ウンルー 効 果 の 検 証 = 加 速 された 測 定 器 が 熱 浴 と 相 互 作 用 していることの 検 証 (1) 測 定 器 が 励 起 される 現 象 をみる 加 速 電 子 のスピン 偏 極 のやぶれ ( 実 際 に 観 測 されている) Bell & Leinaas (83) 加 速 陽 子 の 崩 壊 Ginzburg&Zharkov (65) Rindler 系 : 陽 子 と 熱 浴 中 のニュートリノとの 散 乱 (2) 輻 射 された 光 子 を 観 測 する 熱 浴 による 電 子 運 動 の 揺 らぎに 伴 って 発 生 する 輻 射 を 見 る Chen Tajima PRL83(99) 256 輻 射 された 光 子 の 相 関 をみる Schutzhold Schaller Habs PRL97(06) 加 速 系 での 熱 的 なコンプトン 散 乱 = 加 速 電 子 からentangle した 二 つの 光 子 の 放 出 Rindler 系 = 等 価 慣 性 系 46
47 4 電 子 軌 道 の 揺 らぎによる 輻 射 ( ウンルー 輻 射 ) はあるのか? 加 速 運 動 unruh 熱 浴 との 相 互 作 用 熱 的 揺 らぎ 運 動 余 分 な 電 磁 輻 射 Larmor 輻 射 以 外 の 輻 射 (ウンルー 輻 射 ) があるのではないか? Chen Tajima 99 この 直 感 に 基 づいて ( 物 理 的 な 考 察 から) 以 下 の 結 論 揺 らぎ 運 動 から 来 る 輻 射 (ウンルー)とラーマー 輻 射 の 比 とても 小 さいが 輻 射 の 角 度 分 布 の 違 いから 検 出 可 能 (Larmor は 加 速 に 対 して 横 方 向 に 輻 射 Chen-Tajima は 等 方 的 ) この 結 論 は 本 当 だろうか? 47
48 4 まとめ ウンルー 効 果 = ホーキング 輻 射 : ホライズンのある 時 空 での 量 子 効 果 等 価 原 理 時 空 の 熱 統 計 力 学 的 な 性 質 の 理 解 に 重 要 時 空 や 重 力 の 起 源 ウンルー 効 果 の 検 証 円 形 加 速 度 によるスピン 偏 極 の 破 れ (Bell Leinaas) 超 強 高 度 レーザーでの 加 速 効 果 ウンルー 温 度 は 十 分 高 温 Chen Tajima ウンルー 輻 射 stochastic 方 程 式 の 方 法 (Yamamoto, Zhang, SI) 揺 らぎ 運 動 はシステマティックに 扱 える しかし 輻 射 があるのかどうか いまだに 理 論 的 に 未 解 決 ( 干 渉 効 果 の 問 題 ) 緩 和 時 間 がレーザー 周 期 より 長 い むしろ エンタングルした 光 子 対 を 観 測 するのがよいかも 知 れない 超 強 高 度 レーザーは 基 礎 物 理 学 ( 真 空 の 物 理 )の 探 索 としても とても 面 白 いツールになりえる 48
49 49
50 50
51 51
52 52
53 LABORATORY STUDIES OF THE UNIVERSE - Probing Fundamental Physics - 1. Event Horizon Experiment (Chen and Tajima, 99) 53
54 A Conceptual Design of an Experiment for Detecting the Unruh Effect (by Pisin Chen, 2003) 54
55 6. AXION Research 55
56 56
57 57
58 8. Concluding Remarks 80 years standing question on the experiment of vacuum breakdown is just around the corner. Avalanche (cascade) pair creations with gamma in EM-field reduce the threshold of the vacuum breakdown to I = W/cm 2. This is very achievable intensity compared to the present day experimental data of 2x10 22 W/cm 2 It is a good timing for plasma physicists to get in QED physics with their expertise on Nonlinear Physics and Collective Phenomena. 58
59 Science on NIF Committee just after the Evaluation July 15, 2010 at LLNL David Arnett*, University of Arizona Riccardo Betti, University of Rochester Roger Blandford, Stanford University Nathanial Fisch, Princeton University Ramon Leeper, Sandia National Lab. Christopher McKee, UC Berkeley Mordecai Rosen, LNL Robert Rosner, The Univ. of Chicago (Chair) John Sarrao, Los Alamos National Laboratory Hideaki Takabe, ILE, Osaka University Justin Wark, University of Oxford Choong-Shik Yoo, Washington State University 59
60 Do not hesitate getting into new field. You can challenge any topics with the imagination as long as it is physics. Hideaki Takabe 60
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