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28 items found (0 items not approved), displaying 1 to 10.[First/Prev] 1, 2, 3 [Next/Last]

Instruments / Technical Area	Publication Details	Published
	Software mapping project with nanopositioning capabilities Mark Basham , Jacob Filik , Tom Cobb , James J. Mudd , J. Frederick W. Mosselmans , Pavel Dudin , Aaron Parsons , Paul D. Quinn , Andrew J. Dent Synchrotron Radiation News 31, 21 - 26 DOI: 10.1080/08940886.2018.1506238 Open Access Show Abstract ▼ Abstract: Diamond Light Source is the UK's national synchrotron facility, entering user operation in 2007 with seven beamlines. With 33 operational beamlines, it has delivered user operations for over 10 years. During this time, Diamond has had to adapt its model of delivering software and hardware solutions to the rapidly expanding number of beamlines. Bespoke per-beamline solutions were possible with the initial seven beamlines, but as the number of beamlines grew, this has been harder to sustain. In 2014, Diamond decided to provide a unified software and hardware solution to several new and existing beamlines [1] R. Walton et al., Mapping developments at Diamond, Proceedings of ICA-LEPCS2015, Melbourne, Australia (2015). [Google Scholar] , in order to reduce the overall cost of ownership of these systems. By pooling the resources, a software and hardware stack which was highly capable was developed. These beamlines were primarily engaged in mapping X-ray probe experiments, but with differences in detectors, micro- or nanopositioning stage requirements and, ultimately, the science case. Mapping, or scanning-probe, beamlines conduct a usually rapid series of identical experiments, where the only variable is the spatial position of the X-ray micro- or nanoprobe relative to the sample. Typically at synchrotrons, this involves moving the sample and not the beam, and the pattern traversed by the sample is dependent on the experiment being conducted, but is often an alternating direction raster scan, or snake scan.	Sep 2018
I11-High Resolution Powder Diffraction	A slow-cooling-rate in situ cell for long-duration studies of mineral precipitation in cold aqueous environments on Earth and other planetary bodies Stephen P. Thompson , Hilary Kennedy , Sarah Day , Annabelle R. Baker , Benjamin M. Butler , Emmal Safi , Jon Kelly , Andrew Male , Jonathan Potter , Tom Cobb , Claire A. Murray , Chiu C. Tang , Aneurin Evans , Ronaldo Mercado Journal Of Applied Crystallography 51, 1197 - 1210 DOI: 10.1107/S1600576718008816 Diamond Proposal Number(s): [10025] Open Access Show Abstract ▼ Abstract: Liquid oceans and ice caps, along with ice crusts, have long been considered defining features of the Earth, but space missions and observations have shown that they are in fact common features among many of the solar system's outer planets and their satellites. Interactions with rock-forming materials have produced saline oceans not dissimilar in many respects to those on Earth, where mineral precipitation within frozen seawater plays a significant role in both determining global properties and regulating the environment in which a complex ecosystem of extremophiles exists. Since water is considered an essential ingredient for life, the presence of oceans and ice on other solar system bodies is of great astrobiological interest. However, the details surrounding mineral precipitation in freezing environments are still poorly constrained, owing to the difficulties of sampling and ex situ preservation for laboratory analysis, meaning that predictive models have limited empirical underpinnings. To address this, the design and performance characterization of a transmission-geometry sample cell for use in long-duration synchrotron X-ray powder diffraction studies of in situ mineral precipitation from aqueous ice–brine systems are presented. The cell is capable of very slow cooling rates (e.g. 0.3°C per day or less), and its performance is demonstrated with the results from a year-long study of the precipitation of the hydrated magnesium sulfate phase meridianiite (MgSO4·11H2O) from the MgSO4–H2O system. Evidence from the Mars Rover mission suggests that this hydrated phase is widespread on the present-day surface of Mars. However, as well as the predicted hexagonal ice and meridianiite phases, an additional hydrated sulfate phase and a disordered phase are observed.	Aug 2018
B18-Core EXAFS I18-Microfocus Spectroscopy I20-EDE-Energy Dispersive EXAFS (EDE) I20-Scanning-X-ray spectroscopy (XAS/XES) Controls Detectors Optics	The Spectroscopy Village at Diamond Light Source Sofia Diaz-moreno , Monica Amboage , Mark Basham , Roberto Boada , Nicholas E. Bricknell , Giannantonio Cibin , Thomas Cobb , Jacob Filik , Adam Freeman , Kalotina Geraki , Diego Gianolio , Shusaku Hayama , Konstantin Ignatyev , Luke Keenan , Iuliia Mikulska , J. Frederick W. Mosselmans , James J. Mudd , Stephen A. Parry Journal Of Synchrotron Radiation 25 DOI: 10.1107/S1600577518006173 Open Access Show Abstract ▼ Abstract: This manuscript presents the current status and technical details of the Spectroscopy Village at Diamond Light Source. The Village is formed of four beamlines: I18, B18, I20-Scanning and I20-EDE. The village provides the UK community with local access to a hard X-ray microprobe, a quick-scanning multi-purpose XAS beamline, a high-intensity beamline for X-ray absorption spectroscopy of dilute samples and X-ray emission spectroscopy, and an energy-dispersive extended X-ray absorption fine-structure beamline. The optics of B18, I20-scanning and I20-EDE are detailed; moreover, recent developments on the four beamlines, including new detector hardware and changes in acquisition software, are described.	Jul 2018
Controls	Malcolm: A Middlelayer Framework for Generic Continuous Scanning T. M. Cobb , M. Basham , G. Knap , C. Mita , M. P. Taylor , Gary Yendell , A. Greer 16th Int. Conf. on Accelerator and Large Experimental Control Systems ICALEPCS2017 DOI: 10.18429/JACoW-ICALEPCS2017-TUPHA159 Show Abstract ▼ Abstract: Malcolm is a middlelayer framework that implements high level configure/run behaviour of control system components like those used in continuous scans. It was created as part of the Mapping project at Diamond Light Source to improve the performance of continuous scanning and make it easier to share code between beamlines. It takes the form of a Python framework which wraps up groups of EPICS PVs into modular "Blocks". A hierarchy of these can be created, with the Blocks at the top of the tree providing a higher level scanning interface to GDA, Diamond's Generic Data Acquisition software. The framework can be used as a library in continuous scanning scripts, or can act as a server via pluggable communications modules. It currently has server and client support for both pvData over pvAccess, and JSON over websockets. When running as a webserver this allows a web GUI to be used to visualize the connections between these blocks (like the wiring of EPICS areaDetector plugins). This paper details the architecture and design of framework, and gives some examples of its use at Diamond.	Jan 2018
Controls	Adaptations to CS-Studio for Use at Diamond Light Source W. A. H. Rogers , N. Battam , T. Cobb , M. Furseman , G. Knap 16th Int. Conf. on Accelerator and Large Experimental Control Systems ICALEPCS2017 DOI: 10.18429/JACoW-ICALEPCS2017-TUPHA190 Show Abstract ▼ Abstract: Control System Studio (CS-Studio) is one of the most widely-used display managers for EPICS. It is based on the Eclipse Rich Client Platform (Eclipse RCP), allowing for coherent integration of interfaces for different systems with common graphical elements and preferences. However, this user interface presents a different way of working to those from the previous generation of EPICS tools such as Extensible Display Manager (EDM) and Striptool. At Diamond Light Source, EDM has been used since commissioning in two different ways: for machine operations and for beamline controls. Both uses of EDM will eventually be replaced with CS-Studio and significant effort has been put into this transition. Two kinds of change proved necessary: adaptations to CS-Studio itself, and changes to the typical user workflows. This paper presents both types of changes that were needed to make CS-Studio a productive tool at Diamond.	Jan 2018
	PandABlocks Open FPGA Framework and Web Stack C. Turner , M. Abbott , T. Cobb , I. Gillingham , I. S. Uzun , G. Thibaux , Y. M. Abiven 16th Int. Conf. on Accelerator and Large Experimental Control Systems ICALEPCS2017 DOI: 10.18429/JACoW-ICALEPCS2017-THPHA068 Open Access Show Abstract ▼ Abstract: PandABlocks is the open source firmware and software stack that powers PandABox, a Zynq SoC based "Position and Acquisition" platform for delivering triggers during multi-technique scanning. PandABlocks consists of a number of FPGA functional blocks that can be wired together at run-time according to application specific requirements. Status reporting and high speed data acquisition is handled by the onboard ARM processor and exposed via a TCP server with a protocol suitable for integration into control systems like "EPICS" or "TANGO". Also included in the framework is a webserver and web GUI to visualize and change the wiring of the blocks. The whole system adapts to the functional blocks present in the current FPGA build, allowing different FPGA firmware be created to support new FMC cards without rebuilding the TCP server and webserver. This paper details how the different layers of PandABlocks work together and how the system can be used to implement novel triggering applications.	Jan 2018
	MalcolmJS: a Browser-Based Graphical User Interface I. L. Gillingham , T. M. Cobb ICALEPCS2017 DOI: 10.18429/JACoW-ICALEPCS2017-THPHA184 Open Access Show Abstract ▼ Abstract: A browser-based graphical user interface has been developed at Diamond. It is known as known as MalcolmJS as it communicates using Diamond's Malcolm Middleware protocol. The original goal was to communicate, via websockets with a PandABox in order to allow a user to examine and set attributes of numerous functional blocks within the instrument. With the continuing maturity of the JavaScript language, in particular the release of ES6, along with the availability of off-the-shelf reactive open-source JavaScript libraries, such as Facebook's React and Node.js, a rich set of tools and frameworks have entered the arena of user interface development suitable for control systems. This paper describes the design decisions based on these tools, experiences and lessons learned during and after the development process and the possibilities for future development as a generic, adaptable framework for instrument and control system user interfaces.	Jan 2018
Data acquisition	Pandabox: a multipurpose platform adapted for multitechnique scanning and feedback Yves-marie Abiven , Jérome Bisou , Guillaume Renaud , Frédéric Ta , Isa Servan Uzun , Michael Abbott , Andrew Cousins , Tom Cobb PCaPAC2016 DOI: 10.18429/JACoW-ICALEPCS2017-TUAPL05 Show Abstract ▼ Abstract: Synchrotron SOLEIL and Diamond Light Source are two third generation light sources located respectively in France and the UK. In 2015, both facilities started the collaboration project “PandA” to overcome technical limitations of SPIETBOX at SOLEIL and Zebra at Diamond as well as to manage obsolescence of the products. The collaboration enables both institutes to share the technical leadership on hardware, firmware and software developments. The initial objective is to achieve multichannel encoder processing to synchronize motion systems and data acquisition during experiments addressing simultaneous and multi-technique scanning. However, its design based on Xilinx Zynq SoC is thought to be powerful and modular in terms of firmware as well as for hardware. This flexibility permits envisaging derivative applications and interfacing to different third party hardware. This paper details the organization of this collaboration, status of the ongoing project in terms of hardware and firmware capabilities and the results of the first tests at both sites.	Oct 2017
I11-High Resolution Powder Diffraction	Stepwise observation and quantification and mixed matrix membrane separation of CO 2 within a hydroxy-decorated porous host Christopher G. Morris , Nicholas M. Jacques , Harry G. W. Godfrey , Tamoghna Mitra , Detlev Fritsch , Zhenzhong Lu , Claire Murray , Jonathan Potter , Tom M. Cobb , Fajin Yuan , Chiu C. Tang , Sihai Yang , Martin Schröder Chem. Sci. DOI: 10.1039/C6SC04343G Open Access Show Abstract ▼ Abstract: The identification of preferred binding domains within a host structure provides important insights into the function of materials. State-of-the-art reports mostly focus on crystallographic studies of empty and single component guest-loaded host structures to determine the location of guests. However, measurements of material properties (e.g., adsorption and breakthrough of substrates) are usually performed for a wide range of pressure (guest coverage) and/or using multi-component gas mixtures. Here we report the development of a multifunctional gas dosing system for use in X-ray powder diffraction studies on Beamline I11 at Diamond Light Source. This facility is fully automated and enables in situ crystallographic studies of host structures under (i) unlimited target gas loadings and (ii) loading of multi-component gas mixtures. A proof-of-concept study was conducted on a hydroxyl-decorated porous material MFM-300(VIII) under (i) five different CO2 pressures covering the isotherm range and (ii) the loading of equimolar mixtures of CO2/N2. The study has successfully captured the structural dynamics underpinning CO2 uptake as a function of surface coverage. Moreover, MFM-300(VIII) was incorporated in a mixed matrix membrane (MMM) with PIM-1 in order to evaluate the CO2/N2 separation potential of this material. Gas permeation measurements on the MMM show a great improvement over the bare PIM-1 polymer for CO2/N2 separation based on the ideal selectivity.	Feb 2017
Data acquisition	Mapping Developments at Diamond Rob Walton , Alun Ashton , Mark Basham , Peter Chang , Tom Cobb , S Da Graca , Andrew Dent , Jacob Filik , Matt Gerring , Charles Mita , James Mudd , C M Palmer , U Pederson , Paul Quinn , Nick Rees ICALEPCS2015 Open Access Show Abstract ▼ Abstract: Many synchrotron beamlines offer some form of continuous scanning for either energy scanning or sample mapping. However, this is normally done on an ad-hoc beamline by beamline basis. Diamond has recently embarked on an ambitious project to define how to implement continuous scanning as the standard way of doing virtually all mapping tasks on beamlines. The project is split into four main areas: 1) User interfaces to describe the mapping process in a scientifically relevant way, generating a scan description that can be used later; 2) The physical process of scanning and coordinating hardware motion and detector data capture across the beamline; 3) Capture of the detector data and all the associated meta-data to disk, deciding and describing the layout of the file (or files) for the main use cases; 4) Display and analysis of live data and display of processed data. In order to achieve this common approach across beamlines, the standard software used throughout the facility (Delta Tau motor controllers, EPICS, GDA and DAWN), has been built on.	Oct 2015

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