MAST YAG Thomson scattering upgrade alignment system

2010 ◽  
Vol 81 (10) ◽  
pp. 10D521 ◽  
Author(s):  
J. Figueiredo ◽  
G. Naylor ◽  
M. Walsh ◽  
M. Dunstan ◽  
R. Scannell ◽  
...  
Keyword(s):  
Thomson Scattering ◽  
Alignment System

An automatic beam alignment system based on relative reference points for Thomson scattering diagnosis system

2019 ◽  
Vol 90 (12) ◽  
pp. 126102
Author(s):  
Wei-qiang Tan ◽  
Peng Yuan ◽  
Peng Wang ◽  
Wen-zhe Mao ◽  
Jin-lin Xie ◽  
...  
Keyword(s):  
Thomson Scattering ◽  
Reference Points ◽  
Diagnosis System ◽  
Alignment System

Automatic Beam Alignment System for Thomson Scattering Diagnostic on Experimental Advanced Superconducting Tokamak

2015 ◽  
Vol 34 (5) ◽  
pp. 1051-1059 ◽  
Author(s):  
Hui Chen ◽  
Qing Zang ◽  
Xiao Feng Han ◽  
Shu Mei Xiao ◽  
Teng Fei Wang ◽  
...  
Keyword(s):  
Thomson Scattering ◽  
Alignment System ◽  
Thomson Scattering Diagnostic ◽  
Superconducting Tokamak

On-line alignment and astigmatism correction using a TV and personal computer

1993 ◽  
Vol 51 ◽  
pp. 202-203
Author(s):  
F. Hosokawa ◽  
Y. Kondo ◽  
T. Honda ◽  
Y. Ishida ◽  
M. Kersker
Keyword(s):  
High Resolution ◽  
Personal Computer ◽  
Block Diagram ◽  
Incident Beam ◽  
Ccd Camera ◽  
Alignment Procedure ◽  
Astigmatism Correction ◽  
Transmission Electron ◽  
Alignment System ◽  
On Line

High-resolution transmission electron microscopy must attain utmost accuracy in the alignment of incident beam direction and in astigmatism correction, and that, in the shortest possible time. As a method to eliminate this troublesome work, an automatic alignment system using the Slow-Scan CCD camera has been introduced recently. In this method, diffractograms of amorphous images are calculated and analyzed to detect misalignment and astigmatism automatically. In the present study, we also examined diffractogram analysis using a personal computer and digitized TV images, and found that TV images provided enough quality for the on-line alignment procedure of high-resolution work in TEM. Fig. 1 shows a block diagram of our system. The averaged image is digitized by a TV board and is transported to a computer memory, then a diffractogram is calculated using an FFT board, and the feedback parameters which are determined by diffractogram analysis are sent to the microscope(JEM- 2010) through the RS232C interface. The on-line correction system has the following three modes.

THOMSON SCATTERING WITH A HIGH BACKGROUND LEVEL OF PLASMA RADIATION

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-851-C7-852
Author(s):  
B. Van der Sijde ◽  
T. Poorter ◽  
S. Adema ◽  
B. F.M. Pots ◽  
D. C. Schram
Keyword(s):  
Background Level ◽  
Thomson Scattering ◽  
Plasma Radiation ◽  
High Background

scholarly journals A high-resolution solar spectrum 2000 Å–2200 Å

1970 ◽  
Vol 36 ◽  
pp. 271-273
Author(s):  
B. B. Jones ◽  
B. C. Boland ◽  
R. Wilson ◽  
S. T. F. Engstrom
Keyword(s):  
High Resolution ◽  
Solar Spectrum ◽  
Solar Image ◽  
Roll Control ◽  
North East ◽  
The North ◽  
Alignment System ◽  
Optical Alignment ◽  
South Axis ◽  
System Operating

A high-resolution solar spectrum in the range 2000–2200 Å was obtained in a recent flight of a sunpointing Skylark rocket. This was launched at 04.21 hr UT on April 22, 1969 from Woomera and reached an apogee of 178 km. An optical alignment system operating on the main vehicle pointing system gave a net stabilisation of ±3 arc sec in the position of the solar image relative to the spectrograph slit. The slit, of length 1.0 mm, was set in the north-east quadrant parallel to and 5 arc min from the north/south axis, its lower edge being 1 arc min from the equator. The roll control of ±2.5° was provided entirely by the standard Elliott Bros. type of vehicle stabilisation.

Thomson scattering diagnostic systems in ITER

2016 ◽  
Vol 11 (01) ◽  
pp. C01052-C01052 ◽  
Author(s):  
M. Bassan ◽  
P. Andrew ◽  
G. Kurskiev ◽  
E. Mukhin ◽  
T. Hatae ◽  
...  
Keyword(s):  
Thomson Scattering ◽  
Diagnostic Systems ◽  
Thomson Scattering Diagnostic

Studies of spectral line merging in a laser-induced hydrogen plasma diagnosed with two-color Thomson scattering

2021 ◽  
Vol 103 (6) ◽  
Author(s):  
Krzysztof Dzierżęga ◽  
Franciszek Sobczuk ◽  
Evgeny Stambulchik ◽  
Bartłomiej Pokrzywka
Keyword(s):  
Spectral Line ◽  
Hydrogen Plasma ◽  
Thomson Scattering

scholarly journals Signatures of the Carrier Envelope Phase in Nonlinear Thomson Scattering

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 528
Author(s):  
Marcel Ruijter ◽  
Vittoria Petrillo ◽  
Thomas C. Teter ◽  
Maksim Valialshchikov ◽  
Sergey Rykovanov
Keyword(s):  
Laser Pulse ◽  
Radiation Spectrum ◽  
Thomson Scattering ◽  
High Energy ◽  
Phase Changes ◽  
High Energy Radiation ◽  
Carrier Envelope Phase ◽  
High Intensity Laser ◽  
Experimental Parameters ◽  
Intensity Laser

High-energy radiation can be generated by colliding a relativistic electron bunch with a high-intensity laser pulse—a process known as Thomson scattering. In the nonlinear regime the emitted radiation contains harmonics. For a laser pulse whose length is comparable to its wavelength, the carrier envelope phase changes the behavior of the motion of the electron and therefore the radiation spectrum. Here we show theoretically and numerically the dependency of the spectrum on the intensity of the laser and the carrier envelope phase. Additionally, we also discuss what experimental parameters are required to measure the effects for a beamed pulse.

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