Time-resolved X-ray excited optical luminescence (TR-XEOL) was developed efficiently for the 23A X-ray nanoprobe beamline positioned on the Taiwan Photon Supply (TPS). The benefits of the TR-XEOL facility embrace (i) a nano-focused X-ray beam (<60 nm) with wonderful spatial decision and (ii) a streak digicam that may concurrently report the XEOL spectrum and decay time.
Three time spans, together with regular (30 ps to 2 ns), hybrid (30 ps to 310 ns) and single (30 ps to 1.72 µs) bunch modes, can be found on the TPS, which might fulfil totally different experimental circumstances involving samples with varied lifetimes. It’s anticipated that TR-XEOL on the TPS X-ray nanoprobe might present nice characterization capabilities for investigating the dynamics of photonic supplies.
Single-crystal diffraction on the high-pressure Indo-Italian beamline Xpress at Elettra, Trieste.
On this research the primary in situ high-pressure single-crystal X-ray diffraction experiments at Xpress, the Indo-Italian beamline of the Elettra synchrotron, Trieste (Italy), are reported. An outline of the beamline experimental setup and of the procedures for single-crystal centring, knowledge assortment and processing, utilizing diamond anvil cells, are offered.
Excessive-pressure experiments on an artificial crystal of clinoenstatite (MgSiO3), CaCO3 polymorphs and a pure pattern of leucophoenicite [Mn7Si3O12(OH)2] validated the suitability of the beamline experimental setup to: (i) find and characterize pressure-induced section transitions; (ii) clear up ab initio the crystal construction of high-pressure polymorphs; (iii) carry out advantageous structural analyses on the atomic scale as a operate of strain; (iv) disclose advanced symmetry and structural options undetected utilizing standard X-ray sources.
X-ray fluorescence evaluation of metallic distributions in cryogenic organic samples utilizing large-acceptance-angle SDD detection and steady scanning on the Exhausting X-ray Micro/Nano-Probe beamline P06 at PETRA III.
A brand new Rococo 2 X-ray fluorescence detector was applied into the cryogenic pattern atmosphere on the Exhausting X-ray Micro/Nano-Probe beamline P06 at PETRA III, DESY, Hamburg, Germany. A 4 sensor-field cloverleaf design is optimized for the investigation of planar samples and operates in a backscattering geometry leading to a big stable angle of as much as 1.1 steradian.
The detector, coupled with the Xspress Three pulse processor, permits measurements at excessive depend charges of as much as 106 counts per second per sensor. The measured vitality decision of ∼129 eV (Mn Kα at 10000 counts s-1) is just minimally impaired on the highest depend charges. The ensuing excessive detection sensitivity permits for an correct dedication of hint component distributions comparable to in skinny frozen hydrated organic specimens. First proof-of-principle measurements utilizing continuous-movement 2D scans of frozen hydrated HeLa cells as a mannequin system are reported to reveal the potential of the brand new detection system.
Gentle X-ray spectroscopy with transition-edge sensors at Stanford Synchrotron Radiation Lightsource beamline 10-1.
We current outcomes obtained with a brand new mushy X-ray spectrometer primarily based on transition-edge sensors (TESs) composed of Mo/Cu bilayers coupled to bismuth absorbers. This spectrometer concurrently gives wonderful vitality decision, excessive detection effectivity, and broadband spectral protection. The brand new spectrometer is optimized for incident X-ray energies under 2 keV. Every pixel serves as each a extremely delicate calorimeter and an X-ray absorber with close to unity quantum effectivity.
We have now commissioned this 240-pixel TES spectrometer on the Stanford Synchrotron Radiation Lightsource beamline 10-1 (BL 10-1) and used it to probe the native digital construction of pattern supplies with unprecedented sensitivity within the mushy X-ray regime. As mounted, the TES spectrometer has a most detection stable angle of two × 10-3 sr. The vitality decision of all pixels mixed is 1.5 eV full width at half most at 500 eV. We describe the efficiency of the TES spectrometer by way of its vitality decision and count-rate functionality and reveal its utility as a excessive throughput detector for synchrotron-based X-ray spectroscopy. Outcomes from preliminary X-ray emission spectroscopy and resonant inelastic X-ray scattering experiments obtained with the spectrometer are offered.
Validation of a Monte Carlo simulation for Microbeam Radiation Remedy on the Imaging and Medical Beamline on the Australian Synchrotron.
Microbeam Radiation Remedy (MRT) is an rising most cancers therapy modality characterised by way of high-intensity synchrotron-generated x-rays, spatially fractionated by a multi-slit collimator (MSC), to ablate goal tumours. The implementation of an correct therapy planning system, coupled with simulation instruments that permit for unbiased verification of calculated dose distributions are required to make sure optimum therapy outcomes through dependable dose supply.
On this article we current knowledge from the primary Geant4 Monte Carlo radiation transport mannequin of the Imaging and Medical Beamline on the Australian Synchrotron. We have now developed the mannequin to be used as an unbiased verification instrument for experiments in one in every of three MRT supply rooms and subsequently examine simulation outcomes with equal experimental knowledge.
The normalised x-ray spectra produced by the Geant4 mannequin and a beforehand validated analytical mannequin, SPEC, confirmed excellent settlement utilizing wiggler magnetic subject strengths of two and three T. Nevertheless, the validity of absolute photon flux on the aircraft of the Section House File (PSF) for a hard and fast variety of simulated electrons was unable to be established.
This work reveals a doable limitation of the G4SynchrotronRadiation course of to mannequin synchrotron radiation when utilizing a variable magnetic subject. To account for this limitation, experimentally derived normalisation components for every wiggler subject power decided underneath reference circumstances had been applied. Experimentally measured broadbeam and microbeam dose distributions inside a Gammex RMI457 Stable Water® phantom had been in comparison with simulated distributions generated by the Geant4 mannequin.
Simulated and measured broadbeam dose distributions agreed inside 3% for all investigated configurations and measured depths. Settlement between the simulated and measured microbeam dose distributions agreed inside 5% for all investigated configurations and measured depths.
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