Self‐calibration of the same silicon photodiode in the visible and soft x‐ray ranges

1995 ◽  
Vol 66 (9) ◽  
pp. 4736-4737 ◽  
Author(s):  
M. Krumrey ◽  
E. Tegeler ◽  
R. Goebel ◽  
R. Köhler
Keyword(s):  
Silicon Photodiode ◽  
X Ray ◽  
Self Calibration

Silicon photodiode detector for small-angle X-ray scattering

1990 ◽  
Vol 23 (5) ◽  
pp. 430-432 ◽  
Author(s):  
P. R. Jemian ◽  
G. G. Long
Keyword(s):  
Small Angle ◽  
Signal To Noise Ratio ◽  
Scintillation Counter ◽  
Detector Response ◽  
Silicon Photodiode ◽  
Double Crystal ◽  
Saxs Data ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering

A photodiode X-ray detector was built to measure small-angle X-ray scattering (SAXS) at a synchrotron-radiation source in conjunction with a double-crystal diffractometer SAXS camera at photon energies between 5 and 11 keV. The photodiode detector response in this energy range is linear at photon counting rates up to 1012 photons s−1 and thus it was not necessary to attenuate the monochromatic X-ray beam with calibrated foils. SAXS data taken with a scintillation counter and the photodiode detector are compared, demonstrating marked improvement in counting statistics, rate of data acquisition and signal-to-noise ratio.

scholarly journals Optimization of soft X-ray tomography on the COMPASS tokamak

Nukleonika ◽  
2016 ◽  
Vol 61 (4) ◽  
pp. 403-408 ◽  
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.

scholarly journals Pulse-resolved multi-photon X-ray detection at 31 MHz based on a quadrant avalanche photodiode

2014 ◽  
Vol 21 (4) ◽  
pp. 708-715 ◽  
Author(s):  
Tobias Reusch ◽  
Markus Osterhoff ◽  
Johannes Agricola ◽  
Tim Salditt
Keyword(s):  
High Speed ◽  
Single Photon ◽  
Photon Counting ◽  
Avalanche Photodiode ◽  
Single Photon Detection ◽  
Silicon Photodiode ◽  
Photon Detection ◽  
Time Resolved ◽  
Detection Scheme ◽  
X Ray

The technical realisation and the commissioning experiments of a high-speed X-ray detector based on a quadrant avalanche silicon photodiode and high-speed digitizers are described. The development is driven by the need for X-ray detectors dedicated to time-resolved diffraction and imaging experiments, ideally requiring pulse-resolved data processing at the synchrotron bunch repetition rate. By a novel multi-photon detection scheme, the exact number of X-ray photons within each X-ray pulse can be recorded. Commissioning experiments at beamlines P08 and P10 of the storage ring PETRA III, at DESY, Hamburg, Germany, have been used to validate the pulse-wise multi-photon counting scheme at bunch frequencies ≥31 MHz, enabling pulse-by-pulse readout during the PETRA III 240-bunch mode with single-photon detection capability. An X-ray flux of ≥3.7 × 109 photons s−1can be detected while still resolving individual photons at low count rates.

scholarly journals A Custom Low-Noise Silicon Photodiode Detector Designed for Use With X-ray Capillary Optics

2021 ◽  
pp. 1-1
Author(s):  
Clio C. Sleator ◽  
Bernard F. Phlips ◽  
Marc Christophersen ◽  
Shaorui Li ◽  
Gabriella Carini
Keyword(s):  
Low Noise ◽  
Silicon Photodiode ◽  
X Ray ◽  
Capillary Optics
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