Characterisation of CVD Diamond devices as XBPMs at SOLEIL

Desjardins, Kewin; Duran, Denis; Hustache, S.; Pomorski, M.; Shepard, William

doi:10.1088/1742-6596/425/21/212004

Cited by 6 publications

(7 citation statements)

References 4 publications

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“…7. Like the other diamond XBPMs made with electronic-grade single-crystal CVD (Desjardins et al, 2013), a potential of a few Volts (>0.2 V mm À1 ) is enough to reach constant XBIC values. Thereby, the flux can be easily calculated as equation (2).…”

Section: Flux and Intensity Monitoring Capabilitiesmentioning

confidence: 99%

“…In addition to the excellent physical properties of diamond (radiation hardness, low X-ray absorption, mechanical resistance, large band gap, fast speed charge propagation, etc. ), this detector also has several other advantages compared with the classical quadrant XBPM design (Desjardins et al, 2013) or the strip detector (Shu et al, 1998: a very large active surface (usable with X-ray beams from millimetre to sub-micrometre ISSN 1600-5775 # 2018 International Union of Crystallography sizes), easier to calibrate, and a simplified fabrication process. i.e.…”

Section: Introductionmentioning

confidence: 99%

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X-ray position-sensitive duo-lateral diamond detectors at SOLEIL

Desjardins

Bordessoule

Pomorski

2018

J Synchrotron Radiat

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The performance of a diamond X-ray beam position monitor is reported. This detector consists of an ionization solid-state chamber based on a thin single-crystal chemical-vapour-deposition diamond with position-sensitive resistive electrodes in a duo-lateral configuration. The detector's linearity, homogeneity and responsivity were studied on beamlines at Synchrotron SOLEIL with various beam sizes, intensities and energies. These measurements demonstrate the large and homogeneous (absorption variation of less than 0.7% over 500 µm × 500 µm) active area of the detector, with linear responses independent of the X-ray beam spatial distribution. Due to the excellent charge collection efficiency (approaching 100%) and intensity sensitivity (0.05%), the detector allows monitoring of the incident beam flux precisely. In addition, the in-beam position resolution was compared with a theoretical analysis providing an estimation of the detector's beam position resolution capability depending on the experimental conditions (X-ray flux, energy and readout acquisition time).

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Section: Flux and Intensity Monitoring Capabilitiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

X-ray position-sensitive duo-lateral diamond detectors at SOLEIL

Desjardins

Bordessoule

Pomorski

2018

J Synchrotron Radiat

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“…Such beamlines need fast diagnostics to precisely regulate the position of X-ray beam, where the beam stability is crucial for the success of experiments. In order to improve the performance of current beam diagnostics systems, Detector group of SOLEIL synchrotron and Diamond Sensors Laboratory (LCD) of CEA-LIST started in 2012 development of XBPMs based on single crystal chemical vapor deposited (scCVD) diamond [1]. A standardized production of 40-micrometer thick resistive electrode duo-lateral diamond Position-Sensitive Detectors (PSD) has been elaborated recently.…”

Section: Introductionmentioning

confidence: 99%

Single crystal CVD diamond membranes as Position Sensitive X-ray Detector

2017

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Transparent X-ray Beam Position Monitor (XBPM) has been specifically developed for low energy X-ray beamlines (1.4 keV < E < 5 keV) allowing to transmit more than 80% of 2 keV energy beam. The detector is based on a free-standing single crystal CVD diamond membrane of 4 µm thickness with position-sensitive DLC (Diamond-Like Carbon) resistive electrodes in duolateral configuration. The measured X-ray beam induced current (XBIC) due to the interaction of X-rays with diamond membrane allows precise monitoring of the absolute beam flux and the beam position (by the reconstruction of its center-of-gravity) at beam transmissions reaching 95%. This detector has been installed at SOLEIL synchrotron on the SIRIUS beamline monochromator output and it has shown charge collection efficiency (CCE) reaching 100% with no lag-effects and excellent beam intensity sensitivity monitoring. X-ray beam mapping of the detector showed an XBIC response inhomogeneity of less than 10% across the membrane, corresponding mainly to the measured variation of the diamond plate thickness. The measured beam position resolution is at sub-micron level depending on the beam flux and the readout electronics bandwidth. K : Beam-line instrumentation (beam position and profile monitors; beam-intensity monitors; bunch length monitors); Instrumentation for synchrotron radiation accelerators; Detector design and construction technologies and materials 1Corresponding author. 3 Experimental results 4 3.1 XBIC and Charge Collection Efficiency (CCE) 4 3.2 The homogeneity of the XBIC response 6 3.3 X-ray Beam Position reconstruction and linearity 6 3.4 X-ray Beam Position resolution capability 6 4 Conclusion 8

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“…for X-ray, high-energy particle and heavyion detection (Bohon et al, 2010;Berdermann et al, 2010). Position sensitivity can be obtained by interpolation of the current signals measured from neighboring surface contacts, and submicrometer beam position noise has been demonstrated using both electrometer and radiofrequency readout approaches (Morse et al, 2010;Muller et al, 2012;Desjardins et al, 2013). This work has been carried out using scCVD plates of thicknesses from 500 mm down to $40 mm, which is the practical limit for abrasive thinning-polishing of this material, beyond which breakage of the plates during processing becomes increasingly likely.…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin optical grade scCVD diamond as X-ray beam position monitor

Desjardins

Pomorski

Morse

2014

J Synchrotron Radiat

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Results of measurements made at the SIRIUS beamline of the SOLEIL synchrotron for a new X-ray beam position monitor based on a super-thin single crystal of diamond grown by chemical vapor deposition (CVD) are presented. This detector is a quadrant electrode design processed on a 3 µm-thick membrane obtained by argon-oxygen plasma etching the central area of a CVD-grown diamond plate of 60 µm thickness. The membrane transmits more than 50% of the incident 1.3 keV energy X-ray beam. The diamond plate was of moderate purity (∼1 p.p.m. nitrogen), but the X-ray beam induced current (XBIC) measurements nevertheless showed a photo-charge collection efficiency approaching 100% for an electric field of 2 V µm(-1), corresponding to an applied bias voltage of only 6 V. XBIC mapping of the membrane showed an inhomogeneity of more than 10% across the membrane, corresponding to the measured variation in the thickness of the diamond plate before the plasma etching process. The measured XBIC signal-to-dark-current ratio of the device was greater than 10(5), and the X-ray beam position resolution of the device was better than a micrometer for a 1 kHz sampling rate.

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Characterisation of CVD Diamond devices as XBPMs at SOLEIL

Cited by 6 publications

References 4 publications

X-ray position-sensitive duo-lateral diamond detectors at SOLEIL

X-ray position-sensitive duo-lateral diamond detectors at SOLEIL

Single crystal CVD diamond membranes as Position Sensitive X-ray Detector

Ultra-thin optical grade scCVD diamond as X-ray beam position monitor

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