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Papers by James Rezende Piton

Research paper thumbnail of The Sirius Motion Control Report

Research paper thumbnail of Python for User Interfaces at Sirius

16th Int. Conf. on Accelerator and Large Experimental Control Systems (ICALEPCS'17), Barcelona, Spain, 8-13 October 2017, 2018

Research paper thumbnail of LNLS Control System

Research paper thumbnail of A Control Architecture Proposal for Sirius Beamlines

With the increased performance provided by 4th generation synchrotron light sources, precise moti... more With the increased performance provided by 4th generation synchrotron light sources, precise motion control and event synchronization are essential factors to ensure experiment resolution and performance. Many advanced beamline systems, such as a new high-dynamic double crystal monochromator (HD-DCM) [1], are under development for Sirius, the new machine under construction in Brazil. Among the expected performance challenges in such applications, complex coordinated movements during flyscans/continuous scans, hardware synchronization for pump-and-probe experiments and active noise suppression are goals to be met. Two architectures are proposed to cover general-purpose and advanced applications. The HD-DCM controller was implemented in a MATLAB/Simulink environment, which is optimized for RCP [2, 3]. Hence, its software must be adapted to a more cost-effective platform. One candidate controller is the NI cRIO. The portability of both MATLAB and NI PXI, the present standard control pl...

Research paper thumbnail of Upgrades to the XAFS2 beamline control system and to the endstation at the LNLS

Journal of Physics: Conference Series, 2016

The XAFS2 is a general-purpose X-ray absorption beamline. It is the second one built at the LNLS.... more The XAFS2 is a general-purpose X-ray absorption beamline. It is the second one built at the LNLS. After approximately 7 years in operation this beamline has been substantially updated in order to improve its experimental possibilities. Recently arrived, a 4-circle Huber diffractometer has been incorporated to perform combined experiments. This collects XRD patterns with the XAFS. Through the development of a new sampling environment it is now also possible to perform these measurements in situ/operando conditions. Other upgrades include a complete remodelling of the beamline software and its control system. The following new systems are crucial for the next steps that are currently underway at the beamline, namely, (i) enabling remote access for users and (ii) the testing of QEXAFS measurements.

Research paper thumbnail of The U11 PGM beam line at the Brazilian National Synchrotron Light Laboratory

Journal of Physics: Conference Series, 2013

Research paper thumbnail of Control and diagnostic systems for the LNLS 500-MeV booster synchrotron

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268), 2001

Research paper thumbnail of A Status Update on Hyppie – a Hyppervisored PXI for Physics Instrumentation under EPICS

Brazilian Synchrotron Light Laboratory (LNLS) has a 1.37 GeV source open to scientific community ... more Brazilian Synchrotron Light Laboratory (LNLS) has a 1.37 GeV source open to scientific community since 1997. Since 2012 the control system of its beamlines, originally designed within a proprietary Delphi/Windows platform, is going through an upgrade to the open source EPICS/Linux platform. Within this upgrade strategy, the use of off-the-shelf hardware was also considered an alternative to the original in-house developed equipment, while keeping the EPICS/Linux compatibility. A PXI chassis and its modules were made available to EPICS through the NI Real-Time Hypervisor virtualization system that allows running simultaneously EPICS/Linux and LabVIEW Real-Time in the same PXI controller, sharing a common memory block as their communication interface. This data exchange protocol is called Hyppie. It is ready for some motor, scaler and binary in/out EPICS records and channel access in the Linux layer, leaving the low-level hardware control to the LabVIEW RT layer. Nine LNLS beamlines a...

Research paper thumbnail of Development of fast scanning X-ray fluorescence microscopy at the LNLS D09B-XRF beamline

A large refurbishment started in 2013 with the aim of upgrading the focusing optics of the LNLS D... more A large refurbishment started in 2013 with the aim of upgrading the focusing optics of the LNLS D09B-XRF beamline. Today, the beamline comprises a new X-ray microfocusing optic based on a pair of bendable mirrors in the Kirkpatrick-Baez arrangement. The upgrading strategy also involved the migration of the control system to a NI PXI system (National Instruments Corporation), integrated with an open source EPICS/Linux platform. A new approach using a PXI system as a hardware triggering interface was developed in order to provide a continuous scanning mode of operation ("on-the-fly" scans) at D09B-XRF beamline. In this work, the main features of the LNLS XRF microprobe station as well as a description for setting up a general approach for fast scanning mode operation will be presented.

Research paper thumbnail of Quick Experiment Automation Made Possible Using FPGA in LNLS

Beamlines at LNLS are being modernized to use the synchrotron light as efficiently as possible. A... more Beamlines at LNLS are being modernized to use the synchrotron light as efficiently as possible. As the photon flux increases, experiment speed constraints become more visible to the user. Experiment control has been done by ordinary computers, under a conventional operating system, running high-level software written in most common programming languages. This architecture presents some time issues as computer is subject to interruptions from input devices like mouse, keyboard or network. The programs quickly became the bottleneck of the experiment. To improve experiment control and automation speed, we transferred software algorithms to a FPGA device. FPGAs are semiconductor devices based around a matrix of logic blocks reconfigurable by software. The results of using a NI Compact RIO device with FPGA programmed through LabVIEW for adopting this technology and future improvements are briefly shown in this paper.

Research paper thumbnail of Solutions for the SIRIUS’ beamlines in a nutshell

Research paper thumbnail of Steps towards XAFS beamline automation and remote access

Journal of synchrotron radiation, 2018

Although remote access to beamline synchrotron facilities is now a common operation mode at macro... more Although remote access to beamline synchrotron facilities is now a common operation mode at macromolecular crystallography beamlines thanks to substantial efforts in automated processes for sample preparation and handling, experiment planning and analysis, this is still not the case for XAFS beamlines. Here the experience and developments undertaken at LNLS and Diamond in automation are described, in an attempt to tackle the specific challenges posed by the high variability in experimental conditions and configurations that XAFS measurements require.

Research paper thumbnail of Advanced Facility for Parallel Thermo-Mechanical Simulation and Synchrotron X-Ray Diffraction

In-situ Studies with Photons, Neutrons and Electrons Scattering II, 2014

Research paper thumbnail of Upgrading the LNLS Control System from a Proprietary to a Commercial Communications Environment

The LNLS Control System was built on a proprietary technology, due to the mid-80's Brazilian ... more The LNLS Control System was built on a proprietary technology, due to the mid-80's Brazilian government IT policy. This made interfacing to commercial systems difficult, limited the technology transfer to the private sector, required a staff with specific knowledge and ...

Research paper thumbnail of The MX2 macromolecular crystallography beamline: a wiggler X-ray source at the LNLS

Journal of Synchrotron Radiation, 2009

Research paper thumbnail of Steps towards XAFS beamline automation and remote access

Journal of Synchrotron Radiation, Jun 26, 2018

Although remote access to beamline synchrotron facilities is now a common operation mode at macro... more Although remote access to beamline synchrotron facilities is now a common operation mode at macromolecular crystallography beamlines thanks to substantial efforts in automated processes for sample preparation and handling, experiment planning and analysis, this is still not the case for XAFS beamlines. Here the experience and developments undertaken at LNLS and Diamond in automation are described, in an attempt to tackle the specific challenges posed by the high variability in experimental conditions and configurations that XAFS measurements require.

Research paper thumbnail of The Sirius Motion Control Report

Research paper thumbnail of Python for User Interfaces at Sirius

16th Int. Conf. on Accelerator and Large Experimental Control Systems (ICALEPCS'17), Barcelona, Spain, 8-13 October 2017, 2018

Research paper thumbnail of LNLS Control System

Research paper thumbnail of A Control Architecture Proposal for Sirius Beamlines

With the increased performance provided by 4th generation synchrotron light sources, precise moti... more With the increased performance provided by 4th generation synchrotron light sources, precise motion control and event synchronization are essential factors to ensure experiment resolution and performance. Many advanced beamline systems, such as a new high-dynamic double crystal monochromator (HD-DCM) [1], are under development for Sirius, the new machine under construction in Brazil. Among the expected performance challenges in such applications, complex coordinated movements during flyscans/continuous scans, hardware synchronization for pump-and-probe experiments and active noise suppression are goals to be met. Two architectures are proposed to cover general-purpose and advanced applications. The HD-DCM controller was implemented in a MATLAB/Simulink environment, which is optimized for RCP [2, 3]. Hence, its software must be adapted to a more cost-effective platform. One candidate controller is the NI cRIO. The portability of both MATLAB and NI PXI, the present standard control pl...

Research paper thumbnail of Upgrades to the XAFS2 beamline control system and to the endstation at the LNLS

Journal of Physics: Conference Series, 2016

The XAFS2 is a general-purpose X-ray absorption beamline. It is the second one built at the LNLS.... more The XAFS2 is a general-purpose X-ray absorption beamline. It is the second one built at the LNLS. After approximately 7 years in operation this beamline has been substantially updated in order to improve its experimental possibilities. Recently arrived, a 4-circle Huber diffractometer has been incorporated to perform combined experiments. This collects XRD patterns with the XAFS. Through the development of a new sampling environment it is now also possible to perform these measurements in situ/operando conditions. Other upgrades include a complete remodelling of the beamline software and its control system. The following new systems are crucial for the next steps that are currently underway at the beamline, namely, (i) enabling remote access for users and (ii) the testing of QEXAFS measurements.

Research paper thumbnail of The U11 PGM beam line at the Brazilian National Synchrotron Light Laboratory

Journal of Physics: Conference Series, 2013

Research paper thumbnail of Control and diagnostic systems for the LNLS 500-MeV booster synchrotron

PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No.01CH37268), 2001

Research paper thumbnail of A Status Update on Hyppie – a Hyppervisored PXI for Physics Instrumentation under EPICS

Brazilian Synchrotron Light Laboratory (LNLS) has a 1.37 GeV source open to scientific community ... more Brazilian Synchrotron Light Laboratory (LNLS) has a 1.37 GeV source open to scientific community since 1997. Since 2012 the control system of its beamlines, originally designed within a proprietary Delphi/Windows platform, is going through an upgrade to the open source EPICS/Linux platform. Within this upgrade strategy, the use of off-the-shelf hardware was also considered an alternative to the original in-house developed equipment, while keeping the EPICS/Linux compatibility. A PXI chassis and its modules were made available to EPICS through the NI Real-Time Hypervisor virtualization system that allows running simultaneously EPICS/Linux and LabVIEW Real-Time in the same PXI controller, sharing a common memory block as their communication interface. This data exchange protocol is called Hyppie. It is ready for some motor, scaler and binary in/out EPICS records and channel access in the Linux layer, leaving the low-level hardware control to the LabVIEW RT layer. Nine LNLS beamlines a...

Research paper thumbnail of Development of fast scanning X-ray fluorescence microscopy at the LNLS D09B-XRF beamline

A large refurbishment started in 2013 with the aim of upgrading the focusing optics of the LNLS D... more A large refurbishment started in 2013 with the aim of upgrading the focusing optics of the LNLS D09B-XRF beamline. Today, the beamline comprises a new X-ray microfocusing optic based on a pair of bendable mirrors in the Kirkpatrick-Baez arrangement. The upgrading strategy also involved the migration of the control system to a NI PXI system (National Instruments Corporation), integrated with an open source EPICS/Linux platform. A new approach using a PXI system as a hardware triggering interface was developed in order to provide a continuous scanning mode of operation ("on-the-fly" scans) at D09B-XRF beamline. In this work, the main features of the LNLS XRF microprobe station as well as a description for setting up a general approach for fast scanning mode operation will be presented.

Research paper thumbnail of Quick Experiment Automation Made Possible Using FPGA in LNLS

Beamlines at LNLS are being modernized to use the synchrotron light as efficiently as possible. A... more Beamlines at LNLS are being modernized to use the synchrotron light as efficiently as possible. As the photon flux increases, experiment speed constraints become more visible to the user. Experiment control has been done by ordinary computers, under a conventional operating system, running high-level software written in most common programming languages. This architecture presents some time issues as computer is subject to interruptions from input devices like mouse, keyboard or network. The programs quickly became the bottleneck of the experiment. To improve experiment control and automation speed, we transferred software algorithms to a FPGA device. FPGAs are semiconductor devices based around a matrix of logic blocks reconfigurable by software. The results of using a NI Compact RIO device with FPGA programmed through LabVIEW for adopting this technology and future improvements are briefly shown in this paper.

Research paper thumbnail of Solutions for the SIRIUS’ beamlines in a nutshell

Research paper thumbnail of Steps towards XAFS beamline automation and remote access

Journal of synchrotron radiation, 2018

Although remote access to beamline synchrotron facilities is now a common operation mode at macro... more Although remote access to beamline synchrotron facilities is now a common operation mode at macromolecular crystallography beamlines thanks to substantial efforts in automated processes for sample preparation and handling, experiment planning and analysis, this is still not the case for XAFS beamlines. Here the experience and developments undertaken at LNLS and Diamond in automation are described, in an attempt to tackle the specific challenges posed by the high variability in experimental conditions and configurations that XAFS measurements require.

Research paper thumbnail of Advanced Facility for Parallel Thermo-Mechanical Simulation and Synchrotron X-Ray Diffraction

In-situ Studies with Photons, Neutrons and Electrons Scattering II, 2014

Research paper thumbnail of Upgrading the LNLS Control System from a Proprietary to a Commercial Communications Environment

The LNLS Control System was built on a proprietary technology, due to the mid-80's Brazilian ... more The LNLS Control System was built on a proprietary technology, due to the mid-80's Brazilian government IT policy. This made interfacing to commercial systems difficult, limited the technology transfer to the private sector, required a staff with specific knowledge and ...

Research paper thumbnail of The MX2 macromolecular crystallography beamline: a wiggler X-ray source at the LNLS

Journal of Synchrotron Radiation, 2009

Research paper thumbnail of Steps towards XAFS beamline automation and remote access

Journal of Synchrotron Radiation, Jun 26, 2018

Although remote access to beamline synchrotron facilities is now a common operation mode at macro... more Although remote access to beamline synchrotron facilities is now a common operation mode at macromolecular crystallography beamlines thanks to substantial efforts in automated processes for sample preparation and handling, experiment planning and analysis, this is still not the case for XAFS beamlines. Here the experience and developments undertaken at LNLS and Diamond in automation are described, in an attempt to tackle the specific challenges posed by the high variability in experimental conditions and configurations that XAFS measurements require.