A water-cooled monochromator for the B16 Test beamline at the Diamond Light Source: capabilities and performance characterization

Dolbnya, Igor P.; Sawhney, Kawal; Scott, Stewart M.; Dent, A. J.; Cibin, Giannantonio; Preece, G.; Pedersen, U.; Kelly, Jon; Murray, Paul

doi:10.1107/s1600577518014662

Cited by 19 publications

(6 citation statements)

References 6 publications

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“…Data was collected on the B16 Test Beamline at the DLS synchrotron using a water-cooled Si (111) double crystal monochromator with an energy resolution of < 100 eV at 10 keV (Δ𝐸/𝐸 < 10 −2 ) [22]. This provided monochromatic X-rays in the range of 12 keV -35 keV, with the flux at a particular energy controlled using a selection of aluminium and carbon attenuators.…”

Section: B16 Test Beamline Experimental Setupmentioning

confidence: 99%

Characterisation of Redlen HF-CdZnTe at > 10⁶ ph s^-1 mm^-2 using HEXITEC_MHz

Cline,

Banks,

Bell

et al. 2024

J. Inst.

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In this paper, results are presented from the characterisation of Redlen Technologies high-flux-capable Cadmium Zinc Telluride (HF-CZT) hybridised to the HEXITECMHz ASIC, a novel 1 MHz continuous X-ray imaging system. A 2 mm thick HF-CZT HEXITECMHz detector was characterised on the B16 Test Beamline at the Diamond Light Source and displayed an average FWHM of 850 eV for monochromatic X-rays of energy 20 keV. Measurements revealed a shift in the baseline of irradiated pixels that results in a movement of the entire spectrum to higher ADU values. Datasets taken to analyse the effect's dynamics showed it to be highly localised and flux-dependent, with the excess leakage current generated equivalent to per-pixel shifts of ∼ 543 pA (8.68 nA mm-2) at a flux of 1.26×107 ph s-1 mm-2. Comparison to results from a p-type Si HEXITECMHz device indicate this `excess leakage-current' effect is unique to HF-CZT and it is hypothesised that it originates from trapping at the electrode-CZT interface and a temporary modification of the potential barrier between the CZT and metal electrode.

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Section: B16 Test Beamline Experimental Setupmentioning

confidence: 99%

Characterisation of Redlen HF-CdZnTe at > 10⁶ ph s^-1 mm^-2 using HEXITEC_MHz

Cline,

Banks,

Bell

et al. 2024

J. Inst.

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“…The layout of the optical components at the B16 Test Beamline is shown in Figure 2. It offers a choice of monochromators: a Si (111) double-crystal monochromator (DCM) 18 , a Si (311) channel-cut monochromator (not shown) and a double multilayer monochromator (DMM). The crystal monochromators are normally chosen for imaging experiments because they provide more uniform beam profiles across a wide field of view.…”

Section: Beamline Opticsmentioning

confidence: 99%

X-ray topography of diffracting crystal optics at the Diamond Light Source

Sutter,

Dhamgaye,

Fox

et al. 2023

Advances in X-Ray/Euv Optics and Components XVIII

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Diffracting crystals are extensively used at synchrotron beamlines as X-ray monochromators and phase retarders. Imperfect growth processes, surface damage occurring during fabrication, and strain caused by poor clamping methods can all degrade the quality of these crystals and the X-ray beams diffracted by them. Because X-ray topography of these crystals can reveal both the location and the magnitude of these defects, it is now regularly used as an acceptance test for diffracting crystal optics at the Diamond Light Source synchrotron. Before installation on beamlines, crystal optics are inspected at the versatile bending-magnet B16 Test Beamline, where a variety of topographic techniques have been implemented with both white and monochromatic X-ray beams. A set of digital detectors permits rocking curve imaging with a choice of fields of view and spatial resolution down to 2 µm. Test crystals may be mounted in a variety of geometries according to need. For inspecting monochromator crystals fabricated for imaging applications, both on-the-fly scans and stitching techniques have been used to compose maps of surface defects. First crystals of multi-crystal monochromators have been tested under realistic cryocooled conditions, and their design has been improved to minimize strain. The Diamond Light Source's X-ray topography program serves not only its own beamlines, but also industrial users and other X-ray synchrotron facilities.

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“…The simulation produces data that are in-line with expected results. Variations in crystal pitch have been observed to have an adverse affect on the stability of sample-point intensity (Kristiansen et al, 2015;Dolbnya et al, 2019). Therefore, when investigating how pitch vibration impacts the beam at the sample-point, attention should be given to the DCM.…”

Section: Beamline Overviewmentioning

confidence: 99%

Modelling the effects of optical vibrations on photon beam parameters using ray-tracing software

Houghton

Bloomer

Alianelli

2021

J Synchrotron Radiat

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A method to simulate beam properties observed at the beamline sample-point in the presence of motion of optical components has been developed at Diamond Light Source. A series of stationary ray-tracing simulations are used to model the impact on the beam stability caused by dynamic motion of optical elements. Ray-tracing simulations using SHADOW3 in OASYS, completed over multiple iterations and stitched together, permit the modelling of a pseudo-dynamic beamline. As beamline detectors operating at higher frequencies become more common, beam stability is crucial. Synchrotron ring upgrades to low-emittance lattices require increased stability of beamlines in order to conserve beam brightness. By simulating the change in beam size and position, an estimate of the impact the motion of various components have on stability is possible. The results presented in this paper focus on modelling the physical vibration of optical elements. Multiple beam parameters can be analysed in succession without manual input. The simulation code is described and the initial results obtained are presented. This method can be applied during beamline design and operation for the identification of optical elements that may introduce large errors in the beam properties at the sample-point.

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A water-cooled monochromator for the B16 Test beamline at the Diamond Light Source: capabilities and performance characterization

Abstract: Systematic studies of the performance of a water-cooled X-ray monochromator, designed and built for the B16 Test beamline at Diamond Light Source, UK, are presented.

Cited by 19 publications

References 6 publications

Characterisation of Redlen HF-CdZnTe at > 10⁶ ph s^-1 mm^-2 using HEXITEC_MHz

Characterisation of Redlen HF-CdZnTe at > 10⁶ ph s^-1 mm^-2 using HEXITEC_MHz

X-ray topography of diffracting crystal optics at the Diamond Light Source

Modelling the effects of optical vibrations on photon beam parameters using ray-tracing software

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A water-cooled monochromator for the B16 Test beamline at the Diamond Light Source: capabilities and performance characterization

Abstract: Systematic studies of the performance of a water-cooled X-ray monochromator, designed and built for the B16 Test beamline at Diamond Light Source, UK, are presented.

Cited by 19 publications

References 6 publications

Characterisation of Redlen HF-CdZnTe at > 106 ph s-1 mm-2 using HEXITECMHz

Characterisation of Redlen HF-CdZnTe at > 106 ph s-1 mm-2 using HEXITECMHz

X-ray topography of diffracting crystal optics at the Diamond Light Source

Modelling the effects of optical vibrations on photon beam parameters using ray-tracing software

Contact Info

Product

Resources

About

Characterisation of Redlen HF-CdZnTe at > 10⁶ ph s^-1 mm^-2 using HEXITEC_MHz

Characterisation of Redlen HF-CdZnTe at > 10⁶ ph s^-1 mm^-2 using HEXITEC_MHz