Development of Xray pinhole camera on Shengguang Ⅱup equipment

A study of soft X-ray emission in the 1.0–1.5 keV energy range from a low energy (1.15 kJ) plasma focus has been conducted. X-rays are detected with the combination of Quantrad Si PIN-diodes masked with Al (50 μm), Mg (100 μm) and Ni (17.5 μm) filters and with a pinhole camera. The X-ray flux is found to be measurable within the pressure range of 0.1–1.0 mbar nitrogen. In the 1.0–1.3 keV and 1.0–1.5 keV windows, the X-ray yield in 4π-geometry is 1.03 J and 14.0-J, respectively, at a filling pressure of 0.25 mbar and the corresponding efficiencies are 0.04% and 1.22%. The total X-ray emission in 4π-geometry is 21.8 J, which corresponds to the system efficiency of about 1.9%. The X-ray emission is found dominantly as a result of the interaction of energetic electrons in the current sheath with the anode tip. Images recorded by the pinhole camera confirm the emission of X-rays from the tip of the anode.

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In situ calibration of microchannel-plate-based x-ray pinhole camera for observation of magnetically trapped plasma

Review of Scientific Instruments ◽

10.1063/1.1148303 ◽

1997 ◽

Vol 68 (9) ◽

pp. 3421-3425 ◽

Cited By ~ 7

Author(s):

Y. Kikuchi ◽

Y. Kiwamoto ◽

T. Takahashi ◽

T. Saito ◽

Y. Tatematsu ◽

...

Keyword(s):

Pinhole Camera ◽

Microchannel Plate ◽

X Ray ◽

Magnetically Trapped ◽

In Situ Calibration

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New method for measuring beam profiles using a parametric X-ray pinhole camera

Physics Letters A ◽

10.1016/j.physleta.2013.07.035 ◽

2013 ◽

Vol 377 (38) ◽

pp. 2577-2580 ◽

Cited By ~ 20

Author(s):

Y. Takabayashi ◽

K. Sumitani

Keyword(s):

Pinhole Camera ◽

New Method ◽

X Ray

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Optimization of soft X-ray tomography on the COMPASS tokamak

Nukleonika ◽

10.1515/nuka-2016-0066 ◽

2016 ◽

Vol 61 (4) ◽

pp. 403-408 ◽

Cited By ~ 3

Author(s):

Martin Imríšek ◽

Jan Mlynář ◽

Viktor Löffelmann ◽

Vladimír Weinzettl ◽

Tomáš Odstrčil ◽

...

Keyword(s):

Cross Section ◽

Diagnostic System ◽

Numerical Differentiation ◽

Pinhole Camera ◽

Silicon Photodiode ◽

Robust Solution ◽

X Ray ◽

Photodiode Arrays ◽

Tomographic Inversions ◽

Beryllium Foil

Abstract The COMPASS tokamak is equipped with the soft X-ray (SXR) diagnostic system based on silicon photodiode arrays shielded by a thin beryllium foil. The diagnostic is composed of two pinhole cameras having 35 channels each and one vertical pinhole camera with 20 channels, which was installed recently to improve tomographic inversions. Lines of sight of the SXR detectors cover almost complete poloidal cross section of the COMPASS vessel with a spatial resolution of 1-2 cm and temporal resolution of about 3 μs. Local emissivity is reconstructed via Tikhonov regularization constrained by minimum Fisher information that provides reliable and robust solution despite limited number of projections and ill-conditionality of this task. Improved border conditions and numerical differentiation matrices suppressing artifacts in reconstructed radiation were implemented in the code. Furthermore, a fast algorithm eliminating iterative processes was developed, and it is foreseen to be tested in real-time plasma control.

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X-ray pinhole camera measurements

2013 Abstracts IEEE International Conference on Plasma Science (ICOPS) ◽

10.1109/plasma.2013.6635028 ◽

2013 ◽

Author(s):

Daniel S. Nelson ◽

Michael J. Berninger ◽

Paul A. Flores ◽

Douglas E. Good ◽

David J. Henderson ◽

...

Keyword(s):

Pinhole Camera ◽

X Ray

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Radiographic X-Ray Spot Size Measurement With Bread Piece

18th International Conference on Nuclear Engineering: Volume 3 ◽

10.1115/icone18-29606 ◽

2010 ◽

Author(s):

Yi Gao ◽

Zhong Zhang

Keyword(s):

Line Source ◽

Response Curve ◽

Spot Size ◽

Pinhole Camera ◽

Size Measurement ◽

X Ray ◽

The Relationship

The principle of radiographic X-ray spot size measurement with Bread piece was presented. The output responses of the Bread piece for uniformly-distributed X-ray sources are calculated numerically. The relationship between FWHM of the response curve and the spot size is obtained. Preliminary experiments were performed on the inductive voltage adder (IVA), and the Bread piece is used to measure the axial spot size of the rod-pinch diode (RPD) radiographic source. Under the hypothesis of uniformly-distributed line source, the axial spot size value is obtained, consistent with the measuring result of the pinhole camera, verifying the applicability of the Bread piece for radiographic X-ray spot size measurement.

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Inferred UV fluence focal-spot profiles from soft x-ray pinhole-camera measurements on OMEGA

Review of Scientific Instruments ◽

10.1063/1.5120708 ◽

2020 ◽

Vol 91 (2) ◽

pp. 023505

Author(s):

W. Theobald ◽

C. Sorce ◽

W. R. Donaldson ◽

R. Epstein ◽

R. L. Keck ◽

...

Keyword(s):

Focal Spot ◽

Pinhole Camera ◽

X Ray

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Six-channel grazing incidence soft X-ray pinhole camera

High Power Laser and Particle Beams ◽

10.3788/hplpb20122406.1376 ◽

2012 ◽

Vol 24 (6) ◽

pp. 1376-1380

Author(s):

李军 Li Jun ◽

段书超 Duan Shuchao ◽

黄显宾 Huang Xianbin ◽

李晶 Li Jing ◽

周少彤 Zhou Shaotong ◽

...

Keyword(s):

Grazing Incidence ◽

Pinhole Camera ◽

X Ray

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A Pinhole Camera for Photographing X-Rays from Laser-Produced Plasmas*

Advances in X-ray Analysis ◽

10.1154/s0376030800006650 ◽

1974 ◽

Vol 18 ◽

pp. 136-145

Author(s):

J. J. Hohlfelder ◽

M. A. Palmer

Keyword(s):

Energy Range ◽

Spatial Resolution ◽

Spatial Information ◽

Laser System ◽

Pulsed Laser ◽

Pinhole Camera ◽

Low Energy ◽

X Rays ◽

X Ray ◽

Laboratory Calibration

AbstractA pinhole camera has been used to record low-energy x rays produced from CD2 microsphere irradiation with Sandia Laboratories four-beam, pulsed laser system. Camera useful energy range, spatial resolution, and x-ray energy sensitivity are discussed. Camera x-ray energy sensitivity which was determined by laboratory calibration is compared with measurements obtained with a multi-channel x-ray spectrometer. X-ray photographs of laser-irradiated microspheres are presented. Spatial information about the x-ray source derived from these photographs is discussed.

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