Proceedings of International Conference on Physics in ... - KEK

QGP is studied by using the particle energy and angle
distribution determined just after the phase transition <strong>of</strong>
liquid phase <strong>of</strong> QCD to free particle state which is called
freeze-out [40]. In case <strong>of</strong> laser driven vacuum breakdown,
the lepton pair plasma is generated and its spatial
scale is about 10 -4 cm (=1µm) and life time is about 10 -15 s
(1fs) as schematically shown in Fig. 6. Since the plasma
size and lifetime are million times bigger and longer than
t h we can e develop the Q diagnostics G to P directly ,
[1] V Yan<strong>of</strong>sky . et al., Opt. Express16, 2109n (2008)
[2] G.A.Mourou, Phys. Today 51,No.1,22(1998).
[3] http://www.extreme-light-infrastructure.eu/
[4] Czech: http://www.eli-beams.eu/
[5] Hungary:
http://www.eli-beams.eu/news-from-hungary/
[6] Romania: http://eli.ifa-mg.ro/
[7] ELI: http://www.eli-beams.eu/evropsky-projekt/
eli-v-kostce/
[8] http://www.clf.rl.ac.uk/
[9] http://apri.gist.ac.kr/eng/index.php
[10] http://wwwapr.kansai.jaea.go.jp/outline.html
[ 1 1 ] http://www.ile.osaka-u.ac.jp/
[12] https://jlf.llnl.gov/html/facilities/titan/titan.html
[13] http://www.lle.rochester.edu/
[14] https://e-reports-ext.llnl.gov/pdf/349575.pdf
[15] T.E. Cowan et al., Phys. Rev. Lett. 84, 903 (2000).
[16] T.E. Cowan et al., Laser Part. Beams 17, 773
(1999).
[17] K. Nakashima and H. Takabe, Phys. Plasmas 9, 1505
(2002).
measure the properties <strong>of</strong> the pair plasma. For example,
we can measure the turbulent spectrum <strong>of</strong> the highly
nonlinear stage <strong>of</strong> the pair plasma with a bright x-ray
source in the range <strong>of</strong> atto-second pulse technology to be
developed in Hungary [5]. Deep understanding <strong>of</strong> such
plasma and verification and validation <strong>of</strong> the computational
modeling <strong>of</strong> the vacuum breakdown, avalanche
effect, photon-lepton interaction, and a variety <strong>of</strong> physics
<strong>of</strong> highly relativistic pair plasma are sure to be very much
beneficial for understanding the QGP physics. We can say
the vacuum breakdown physics is a model experiment <strong>of</strong>
QGP in relatively small scale laser facility.
CONCLUSION
With the progress <strong>of</strong> intense laser technology, the
physics to be solved in laser-matter interaction has
already become relativistic regime for electrons. In
several years, we will come to the regime where laservacuum
interaction becomes important and the 80-years
standing theory <strong>of</strong> the vacuum breakdown will be really
experimentally studied. We concluded that the electron
pair creation can be expected from 10 24 W/cm 2 with use
<strong>of</strong> seed electrons and thanks to the resultant avalanche
effect. When the laser intensity exceeds more than 10 26
W/cm 2 [18] T. Cowan et al, 2002: H. Takabe, in “Hadron and
Nuclear Physics 09”, Edt. A. Hosaka et al., p.
388-403 (World Scientifics, 2010)
[19] Y. Sentoku, private communication.
[20] For example; L. L. Stephan, Computer Physics
Communications 72, Issues 2-3, November 1992,
Pages 144-148
[21]
[22]
[23]
[24]
A. Mizuta, S. Yamada, and H. Takabe,
Astrophysical J. 606 804 (2004).
H. Chen et al., Phys. Plasmas 16, 122702 (2009).
References there in.
H. Chen, H. Takabe et al, NIF proposal (2010) ,
not published, approved by NIF committee.
P. Dirac, The Principle <strong>of</strong> Quantum Mechanics.
[25]
(Oxford Univ. Press, 1930).
A. R. Bell and J. G. Kirk, Phys. Rev. Lett., 101,
200403 (2008)
[26] Landau & Lifshitz, “Theory <strong>of</strong> Classical Field”,
Chap. 9, S.75.
[27] J. G. Kirk, A. R. Bell, and I. Arka, Plasam Phys.
, we can really break down the pure vacuum with
[28]
[29]
[30]
[31]
[32]
Control Fusion 51 085008 (2009).
H. Takabe, “Relativistic Plasma Physics”, J.
Plasma Fusion Res. 78 427-438 (2002), in
Japanese
N. Elkina and H. Ruhl, in this proceeding
N. B. Narozhny et al., JETP Letters
R. Ruffini et al., Physics Reports 487, 1-140
(2010)
A. M. Fedotov, Laser Physics 19, 214 (2009)
help <strong>of</strong> pairs appearing by quantum tunneling effect. W e [33] S. S. Bulanov et al., Phys. Rev. Lett. 104, 220404
also pointed out that this lepton fireball physics will be (2010)
beneficial to modeling quark-gluon plasmas.
[34] G. Miyaji, PhD Thesis, January, 2004
[35] For example; F. D. Seward and P. A. Charles,
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