第518回レーザーエネルギー学研究センターコロキウムご案内
(Invitation to Colloquium of ILE No.
518)
各位
下記のとおりコロキウムを開催致しますので、万障お繰り合わせの上ご参加下さい。
Dear colleagues,
Institute of Laser Engineering, Osaka University will hold the colloquium
No. 518 on the date and at the place shown below. We encourage all
of you to take part in the colloquium.
Yours sincerely,
記
●表題(Title): Atomic Data Calculation at Queen's University Belfast
○講演者(Speaker): Kanti M. Aggarwal (Astrophysics Research Centre, Queen's
University Belfast, UK)
○概要(Abstract):
In this seminar atomic data (namely energy levels, radiative rates,
life-times, electron impact excitation collision strengths, and rate
coefficients) will be discussed for a variety of ions, which have
applications in laboratory, lasing, fusion, solar, and other astrophysical
plasmas. These results are theoretical from the fully relativistic
GRASP (General purpose Relativistic Atomic Structure Package) and
DARC (Dirac Atomic R-matrix Code) programs. The difficulties of performing
large calculations, and importance of including relativistic effects
and resonances in the determination of excitation rates will be highlighted.
Comparisons will be shown and discrepancies with other available
data from Distorted Wave codes, non-relativistic results, and with
other semi-relativistic R-matrix results will be discussed. Results
will specifically be presented from our recent calculations on three
Si ions, namely Si XII, XIII and XIV. The difficulties of assessing
the accuracy of atomic data will also be emphasized.
●日時(Date): 2010.2.19, 13:30-14:30
○場所(Place): 研究棟３階中会議室（３１４号室）
●連絡先(Contact Person): Professor Hiroaki Nishimura
○備考(Notes):
第519回レーザーエネルギー学研究センターコロキウムご案内
(Invitation to Colloquium of ILE No.
519)
各位
下記のとおりコロキウムを開催致しますので、万障お繰り合わせの上ご参加下さい。
Dear colleagues,
Institute of Laser Engineering, Osaka University will hold the colloquium
No. 519 on the date and at the place shown below. We encourage all
of you to take part in the colloquium.
Yours sincerely,
記
●表題(Title): Ignition Science on the US National Ignition Facility
○講演者(Speaker): B. J. MacGowan
Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
○概要(Abstract):
The National Ignition Facility , (NIF) has been constructed with the
goal of supporting high energy density science including the demonstration
of ignition through Inertial Confinement . NIF is astadium-sized
facility containing a 192-beam,1.8-Megajoule, 500- Terawatt, 351-nm
laser system with a 10-meter diameter target chamber contained within
a 2-meter thick concrete shield wall. The 192 laser beams willcompress
fusion targets to produce the conditions needed for thermonuclear
burn, releasing more energy than used to initiate the compression.
Other NIF experiments will study physical processes at temperatures approaching
10^8 K and pressures of 10^11 atmospheres, conditions that exist
naturally only in the interiors of stars and planets. Expected sience
and physics will be reported.
●日時(Date): 2010.3.18, 13:30-14:30
○場所(Place): 研究棟4階大ホール
●連絡先(Contact Person): Professor Kazuo A. Tanaka
○備考(Notes):
第520回レーザーエネルギー学研究センターコロキウムご案内(Invitation to Colloquium of ILE No.
520)
各位
下記のとおりコロキウムを開催致しますので、万障お繰り合わせの上ご参加下さい。
Dear colleagues,
Institute of Laser Engineering, Osaka University will hold the colloquium
No. 520 on the date and at the place shown below. We encourage all
of you to take part in the colloquium.
Yours sincerely,
記
●表題(Title): Plasmas for the Generation and Detection of Terahertz
Radiation
○講演者(Speaker): Hartmut Roskos（客員教授）
○概要(Abstract):
Plasmas are important for THz photonics. Not only because of their
use in what is now called THz plasmonics for beam shaping, beam guidance,
frequency filtering, the realization of left-handed materials, et
cetera. I will focus on two other aspects, namely the generation
and detection of THz radiation with the help of plasmas in two completely
different material systems. Each of the two cases has its own important
and broad applications.
In the first case, we generate plasmas in
air with high-intensity femtosecond laser pulses. If their waveform
is asymmetric (positive and negative field lobes not identical),
then the plasma emits intensive THz pulses. These are not only interesting
because they can reveal a lot about the laser field and the plasma
dynamics themselves, but they also have a practical relevance because
it is possible to generate intensive and broadband THz pulses with
spectral content reaching from the microwave all the way into the
infrared region (0.1 THz to more than 120 THz). Such pulses can be
used as "THz white-light pulses” for many spectroscopic applications.
In the second case, we employ plasma oscillations in the channels of
ordinary silicon CMOS transistors to make them responsive to THz
radiation. The mechanism ? distributed resistive mixing ? has the
great charm that it allows to realize low-cost multi-pixel detector
arrays (cameras) for continuous-wave sub-1-THz radiation entirely
on the basis of the well-developed CMOS technology. Such cameras
will find use in the near future in applications such as quality
control in industrial environments, security screening, and so forth.
I will give some examples of emerging practical applications of sub-1-THz
radiation from the work of SynView GmbH, a spin-off company from
my research group, which devotes itself to three-dimensional THz
imaging for non-destructive testing purposes.
●日時(Date): 2010.2.19, 14：00-15：30
○場所(Place): 21世紀プラザ3階会議室
●連絡先(Contact Person): 長島 健
○備考(Notes):
