Method for measuring the intensity profile of a CT fan-beam filter

2014 ◽  
Author(s):  
Bruce R. Whiting ◽  
Andreea Dohatcu
Keyword(s):  
Intensity Profile ◽  
Beam Filter

Effects of the Laser Intensity Profile on Ignition of Hydrogen-Air Mixture

2021 ◽  
Author(s):  
Albina Tropina ◽  
Sagar Pokharel ◽  
Mikhail N. Shneider
Keyword(s):  
Laser Intensity ◽  
Intensity Profile

Phase error calculation in a Fizeau interferometer by Fourier expansion of the intensity profile

1996 ◽  
Vol 35 (1) ◽  
pp. 61 ◽  
Author(s):  
B. V. Dorrío ◽  
J. Blanco-García ◽  
C. López ◽  
A. F. Doval ◽  
R. Soto ◽  
...  
Keyword(s):  
Fourier Expansion ◽  
Phase Error ◽  
Intensity Profile ◽  
Fizeau Interferometer ◽  
Error Calculation

Interferometry based technique for intensity profile measurements of far IR beams

2007 ◽  
Vol 46 (18) ◽  
pp. 3821
Author(s):  
Alexander A. Soloviev ◽  
Efim A. Khazanov ◽  
Ilya E. Kozhevatov ◽  
Oleg V. Palashov
Keyword(s):  
Intensity Profile

scholarly journals High gas-to-dust size ratio indicating efficient radial drift in the mm-faint CX Tauri disk

2019 ◽  
Vol 626 ◽  
pp. L2 ◽  
Author(s):  
S. Facchini ◽  
E. F. van Dishoeck ◽  
C. F. Manara ◽  
M. Tazzari ◽  
L. Maud ◽  
...  
Keyword(s):  
Near Infrared ◽  
Angular Resolution ◽  
Spectral Energy Distribution ◽  
Theoretical Models ◽  
Intensity Profile ◽  
Continuum Emission ◽  
Spectral Energy ◽  
High Angular Resolution ◽  
Sharp Drop ◽  
Large Program

The large majority of protoplanetary disks have very compact continuum emission (≲15 AU) at millimeter wavelengths. However, high angular resolution observations that resolve these small disks are still lacking, due to their intrinsically fainter emission compared with large bright disks. In this Letter we present 1.3 mm ALMA data of the faint disk (∼10 mJy) orbiting the TTauri star CX Tau at a resolution of ∼40 mas, ∼5 AU in diameter. The millimeter dust disk is compact, with a 68% enclosing flux radius of 14 AU, and the intensity profile exhibits a sharp drop between 10 and 20 AU, and a shallow tail between 20 and 40 AU. No clear signatures of substructure in the dust continuum are observed, down to the same sensitivity level of the DSHARP large program. However, the angular resolution does not allow us to detect substructures on the scale of the disk aspect ratio in the inner regions. The radial intensity profile closely resembles the inner regions of more extended disks imaged at the same resolution in DSHARP, but with no rings present in the outer disk. No inner cavity is detected, even though the disk has been classified as a transition disk from the spectral energy distribution in the near-infrared. The emission of 12CO is much more extended, with a 68% enclosing flux radius of 75 AU. The large difference of the millimeter dust and gas extents (> 5) strongly points to radial drift, and closely matches the predictions of theoretical models.

scholarly journals DESAIN KOLIMATOR TIPE TABUNG UNTUK PENYEDIAAN BERKAS RADIOGRAFI DENGAN SUMBER GENERATOR NETRON

2007 ◽  
Vol 10 (2) ◽  
Author(s):  
Yohannes Sardjono
Keyword(s):  
Monte Carlo ◽  
Mcnp Code ◽  
Beam Filter

DESAIN KOLIMATOR TIPE TABUNG UNTUK PENYEDIAAN BERKAS RADIOGRAFI DENGAN SUMBERGENERATOR NETRON. Telah dilakukan desain kolimator untuk penyediaan berkas radiografi netron dengansumber generator netron. Kolimator ini berguna untuk mendapatkan fluks netron termal yang optimal dengan pengotorradiasi (netron epitermal dan gamma) yang sekecil-kecilnya. Proses desain dilakukan dengan melakukan simulasimenggunakan Monte Carlo N-Particle (MCNP) code untuk menghitung tally berupa fluks netron dan laju dosisekuivalen. Desain kolimator yang dipilih adalah jenis tabung yang tersusun dari material moderator parafin, reflektorgrafit, dan kolimator wall alumunium. Parameter optimasi desain adalah panjang kolimator 4 - 8 cm, dengan interval 1cm, jenis bahan moderator (parafin, grafit, berilium, dan air), jenis beam filter adalah timbal, dan material apertureadalah boron atau kadmium. Kriteria penerimaan adalah fluks netron termal 103 - 106 n.cm-2.s-1, n/γ ratio > 106n.cm-2.mR-1 dan Cd ratio > 2. Untuk keselamatan lingkungan digunakan parafin sebagai biological shielding dan timbalsebagai casing. Dari hasil perhitungan optimasi desain dapat diperoleh bahwa kolimator dengan sumber generatornuetron menghasilkan keluaran fluks netron termal 4.67 + 0.5981 x 103 n.cm-2.s-1, rasio netron-gamma (n/γ) ≥ (1.56 +0,000111).106 n.cm–2 mR-1 dan laju dosis ekuivalen pada jarak 10 cm dari permukaan fasilitas adalah 0,0378 - 0,0521mR/jam.

Light Intensity Profile Control along the Optical Axis with Complex Pupils Implemented onto a Phase-Only SLM

2008 ◽  
Author(s):  
O. López-Coronado ◽  
C. Iemmi ◽  
J. Davis ◽  
J. Campos ◽  
M. J. Yzuel ◽  
...  
Keyword(s):  
Light Intensity ◽  
Optical Axis ◽  
Intensity Profile ◽  
Profile Control

Optimum control of the laser beam intensity profile with a deformable mirror

1997 ◽  
Vol 36 (30) ◽  
pp. 7689 ◽  
Author(s):  
Koshichi Nemoto ◽  
Takuya Nayuki ◽  
Takashi Fujii ◽  
Naohiko Goto ◽  
Yoshi-kazu Kanai
Keyword(s):  
Laser Beam ◽  
Intensity Profile ◽  
Beam Intensity ◽  
Deformable Mirror ◽  
Optimum Control ◽  
Laser Beam Intensity
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