High power industrial laser and present status of development of laser technology in automated branches of industry abroad (survey)

1991 ◽  
Vol 12 (3) ◽  
pp. 237-249
Author(s):  
P. G. Grigor'ev ◽  
A. A. Stepanov ◽  
V. A. Shcheglov
Keyword(s):  
High Power ◽  
Present Status ◽  
Laser Technology

Review and present status of the TEXTOR radiative improved (RI) mode

1998 ◽  
Vol 59 (4) ◽  
pp. 587-610 ◽  
Author(s):  
P. E. VANDENPLAS ◽  
A. M. MESSIAEN ◽  
J. P. H. E. ONGENA ◽  
U. SAMM ◽  
B. UNTERBERG
Keyword(s):  
Density Profile ◽  
High Power ◽  
Present Status ◽  
Particle Transport ◽  
Density Limit ◽  
Radiated Power ◽  
Edge Radiation ◽  
Intermediate Size ◽  
Power Fraction ◽  
Better Than

From 1990, the boronized TEXTOR tokamak was characterized by an improved confinement (coined the ‘I mode’) at high power that was substantially better than the L mode, but densities had to be limited to n[bar]e0/nGR[lsim ]0.5–0.6, where nGR is the Greenwald density limit. With the injection of Ne, Si or Ar in order to increase the edge radiation and provided that γ=Prad/Ptot[greater, similar]0.5, PNBI-co/Ptot[greater, similar]0.25 and n[bar]e0/nGR[greater, similar]0.75, a further improved confinement called the radiative improved mode (RI mode) was discovered in 1993 on TEXTOR, a tokamak of intermediate size, and confirmed on TEXTOR-94. The radiated power fraction γ can reach 0.9, and the radiation is nearly isotropically distributed over the torus wall. The RI mode is characterized by its ability to obtain simultaneously and stationarily high densities and high confinement. It is linked to a substantial lowering of edge ne, Te and Ti, a reduction in particle transport and a peaking of the density profile. The RI-mode confinement scales on TEXTOR as τE= (n[bar]e0/nGR)τITERH93-P and values up to n[bar]e0/nGR≈1.2 are obtained. There is no detrimental concentration of the seeded impurity at the centre of the plasma. Results of three different interpretative and modelling approaches are in agreement with the improved confinement features; the preliminary indications are that ITG turbulence is strongly reduced. The Z mode observed on ISX-B has a clear resemblance to the RI mode. The very favourable features of the RI mode justify efforts in trying to establish it on larger machines to verify if the present scaling then holds.

Research progress of high-power diamond laser technology (Invited)

2020 ◽  
Vol 49 (12) ◽  
pp. 20201076-20201076
Author(s):  
白振旭 Zhenxu Bai ◽  
杨学宗 Xuezong Yang ◽  
陈晖 Hui Chen ◽  
金舵 Duo Jin ◽  
丁洁 Jie Ding ◽  
...  
Keyword(s):  
High Power ◽  
Research Progress ◽  
Laser Technology

Present status and future perspectives of high power lasers at the NLHPLP

2021 ◽  
Author(s):  
Jianqiang Zhu ◽  
Xiaoqi Zhang ◽  
Zhixiang Zhang ◽  
Jiangfeng Wang ◽  
Hui Wei ◽  
...  
Keyword(s):  
High Power ◽  
Present Status ◽  
Future Perspectives ◽  
High Power Lasers

Applications of high-power laser technology to wide-bandgap nitride semiconductor processing

2002 ◽  
Author(s):  
Petr G. Eliseev ◽  
Andrei A. Ionin ◽  
Yurii M. Klimachev ◽  
Dmitrii V. Sinitsyn ◽  
Jinhyun Lee ◽  
...  
Keyword(s):  
High Power ◽  
Wide Bandgap ◽  
High Power Laser ◽  
Semiconductor Processing ◽  
Power Laser ◽  
Laser Technology ◽  
Nitride Semiconductor

scholarly journals Development of a high-power KrF laser system, ASHURA

1989 ◽  
Vol 7 (3) ◽  
pp. 383-392 ◽  
Author(s):  
Y. Owadano ◽  
I. Okuda ◽  
Y. Matsumoto ◽  
M. Tanimoto ◽  
T. Tomie ◽  
...  
Keyword(s):  
Power Density ◽  
High Power ◽  
Present Status ◽  
Laser System ◽  
Maximum Power ◽  
Main Amplifier ◽  
Krf Laser ◽  
Wall Plug Efficiency ◽  
Time Pulse

The present status of the development of a high-power KrF laser system, Ashura, is described. The main amplifier has generated 710 J (95 ns) at the pumping density of 1·lMW/cm3 with the wall plug efficiency of 2·0%. Maximum power of 9·0 GW (200 J/22 ns) per beam has been obtained from the beam lines of six-time pulse multiplexing. Power density of 1 × 1014 W/cm2 has been achieved on target with a 10−6 pre-pulse.

High Power Laser Technology in Downhole Applications, Reshaping the Industry

2017 ◽  
Author(s):  
Sameeh I. Batarseh ◽  
Ramona Graves ◽  
Omar Al Obaid ◽  
Abdullah Al Hartih ◽  
Haitham Othman
Keyword(s):  
High Power ◽  
High Power Laser ◽  
Power Laser ◽  
Laser Technology

Preliminary test results on high-power-gasdynamic laser installation for laser technology at Cherepovetz metallurgy work

1994 ◽  
Author(s):  
Alexei A. Betev ◽  
Leonid I. Danilov ◽  
Vyatcheslav T. Karpukhin ◽  
Yuri B. Konev ◽  
Yurii V. Lipukhin
Keyword(s):  
High Power ◽  
Preliminary Test ◽  
Gasdynamic Laser ◽  
Test Results ◽  
Laser Technology ◽  
Laser Installation
Sign in / Sign up

Export Citation Format

Share Document