Low background, UHV compatible scintillator detector for the CLS cryo scanning soft X-ray microscope

Leontowich, Adam F. G.; Taylor, D M; Wang, Jian; Regier, C.; Regier, Tom; Berg, Russ; Beauregard, D.; Dynes, James J.; Senger, Curtis; Swirsky, John; Karunakaran, Chithra; Hitchcock, Adam P.; Urquhart, Stephen G.

doi:10.1088/1742-6596/849/1/012045

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Once dry, the piece is removed from the beaker and the parafilm removed. In agreement with Leontowich et al [32], we find the optimum coating to consist of the thinnest layer required to for almost full area coverage i.e. a few monolayers of phosphor particles.…”

Section: Detector Phosphor Recoatingsupporting

confidence: 92%

“…Note that the critical area to be coated is at the very top of the submerged piece shown in figure 7 and so the coating thickness will depend on the dispersed particle concentration and the height of solution above the application area. We prefer this dispersion-settling deposition method over the method described by Leontowich et al [32] (plunging a greased tip into loose phosphor powder) because it does not rely on the use of vacuum grease and therefore doesn't contribute to the amount of carbon in the residual gas of the experimental chamber.…”

Section: Detector Phosphor Recoatingmentioning

confidence: 99%

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Controlling optics contamination at the PolLux STXM

et al. 2018

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Section: Detector Phosphor Recoatingsupporting

confidence: 92%

Section: Detector Phosphor Recoatingmentioning

confidence: 99%

Controlling optics contamination at the PolLux STXM

et al. 2018

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Photonic-crystals-based GAGG:Ce scintillator with high light output and fast decay time for soft X-ray detection

Meng

Yang

et al. 2022

Nuclear Instruments and Methods in Physics Research Section A:

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Cryo scanning transmission x-ray microscope optimized for spectrotomography

Leontowich

Berg

Regier

et al. 2018

Review of Scientific Instruments

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A cryo scanning transmission X-ray microscope, the cryo-STXM, has been designed and commissioned at the Canadian Light Source synchrotron. The instrument is designed to operate from 100 -4000 eV (λ = 12.4 -0.31 nm). Users can insert a previously frozen sample, through a load lock, and rotate it ±70° in the beam to collect tomographic data sets. The sample can be maintained for extended periods at 92 K primarily to suppress radiation damage, and a pressure on the order of 10 -9 Torr to suppress sample contamination. The achieved spatial resolution (30 nm) and spectral resolution (0.1 eV) are similar to other current soft X-ray STXMs, as demonstrated by measurements on known samples and test patterns. The data acquisition efficiency is significantly more favorable for both imaging and tomography. 2D images, 3D tomograms and 4D chemical maps of automotive hydrogen fuel cell thin sections are presented Introduction:Scanning transmission X-ray microscopy (STXM) is an established imaging technique for investigating the structure and composition of matter at the micro-to nanometer length scale.Briefly, in STXM an X-ray beam is focused down to a small spot onto a sample using optics such as a zone plate (ZP) lens or Kirkpatrick-Baez (KB) mirrors [1-3]. Two dimensional images are compiled from a series of line scans, performed by scanning the sample downstream of the optic(s), or by scanning the optic(s) upstream of the sample. Modern soft X-ray STXMs, such as the ambient-STXM at the Canadian Light Source (CLS, Saskatoon, Canada) spectromicroscopy (SM) beamline 10ID-1 [4], acquire images of sub-micrometer thick specimens with a bright field spatial resolution that is close to diffraction limited [5]: 30 nm half pitch is now considered routine at most facilities. When a STXM is combined with a soft X-ray beamline at a synchrotron, spectromicroscopy is enabled [2]. The focused beam can be held at one spatial location while the photon energy is scanned to perform X-ray absorption near edge spectroscopy (XANES) on a small volume [2]. More often, a series of monochromatic images over a photon energy range of interest is collected, and each pixel in the resulting "image stack" contains a XANES spectrum [6]. Image stacks can be converted into quantitative chemical maps using thickness normalized reference spectra [2]. Soft X-ray STXMs have found applications in diverse fields such as human health [7], agriculture [8], environmental studies [9], nanofabrication [10], and advanced materials [11].The overall form and function of current ZP based STXMs can be traced back to instruments built in the 1980s at the National Synchrotron Light Source (NSLS, Brookhaven National Laboratory, USA) [12,13]. A concise timeline of instrumentation developments from around the

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Low background, UHV compatible scintillator detector for the CLS cryo scanning soft X-ray microscope

Cited by 4 publications

References 8 publications

Controlling optics contamination at the PolLux STXM

Controlling optics contamination at the PolLux STXM

Photonic-crystals-based GAGG:Ce scintillator with high light output and fast decay time for soft X-ray detection

Cryo scanning transmission x-ray microscope optimized for spectrotomography

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