Do Robots Dream of Electron Beams?

NSLS-II scientists are changing how many experiments run by employing a coordinated team of AI-powered robots

UPTON, N.Y. — To build the experimental stations of the future, scientists at the National Synchrotron Light Source II (NSLS-II), a U.S. Department of Energy (DOE) Office of Science user facility at DOE’s Brookhaven National Laboratory, are learning from some of the challenges that face them today. As light source technologies and capabilities continue to advance, researchers must navigate increasingly complex workflows and swiftly evolving experimental demands.

To meet these challenges, a team of NSLS-II scientists is training a team of AI-driven collaborative robots. These agile, adaptable systems are being developed to quickly shift between tasks, adjust to different experimental setups, and respond autonomously to real-time data. By taking on work using learning processes rather than preprogrammed steps, much like a human researcher, these robots are helping scientists realize a future where these systems can be deployed on demand, empowering them to explore new possibilities and fully harness the facility’s cutting-edge capabilities to investigate everything from battery technologies to quantum materials.

The team has successfully demonstrated this technology by rapidly deploying a prototype of one of these robotic systems to run an autonomous experiment overnight. The setup included different-sized samples that were randomly placed in the experimental environment without any preprogrammed knowledge of their location. The simulated experiment proceeded for eight hours without errors, showcasing the potential for user-friendly, AI-driven robotic integration in scientific research. Their results were recently published in Digital Discovery.

“We’re envisioning a new path forward,” said Phillip Maffettone, a computational scientist in NSLS-II’s Data Science and Systems Integration (DSSI) division and lead author of the study. “This approach isn’t just about speeding up current experiments; it’s a roadmap for the next generation of beamlines — modular, intelligent, and deeply integrated with AI. We’re designing a system that dynamically adapts to user needs.”

Building an automation foundation

NSLS-II currently operates 29 beamlines, with three more under construction and several others in development. The range, complexity, and volume of experiments conducted across these beamlines presents a challenge: designing a system that can automate existing workflows while remaining flexible enough to adapt to new types of experiments and new beamlines as they come online.

The synchrotron community has already found a lot of success in automating macromolecular X-ray crystallography (MX) experiments using robotics. MX beamlines can now perform automated and semi-automated experiments that routinely reach 99.96% reliability, which has increased the throughput of MX experiments. At NSLS-II alone, almost 13,000 samples were mounted at the Highly Automated Macromolecular Crystallography (AMX) beamline over the past four months. The robotic systems used at these beamlines are very effective for MX samples, and the robots have inspired scientists to think about what a more modular system could look like as they developed ideas for new beamline designs.

Daniel Olds is the lead beamline scientist at the upcoming High Resolution Powder Diffraction (HRD) beamline at NSLS-II. The beamline’s design enables users to take fast, in situ measurements that reveal real-time material behaviors such as battery cycling, catalytic reactions, and phase transitions — an approach that demands an innovative, adaptable system tailored to custom sample environments.

“We’re tackling a challenge faced by many researchers: how do we get the most science out of a limited window of beam time?” Olds said. “With so many formats and such little time, managing these experiments becomes a high-stakes logistical sprint.”

To envision what future experiments could look like, Maffettone, Olds, and a team of scientists from DSSI studied current experiments that would benefit most from flexible automation. They focused on the Pair Distribution Function (PDF) beamline, where visiting scientists, particularly those studying battery materials, often arrive with hundreds of unique samples. These can range from powders in narrow capillaries to flat “coupons” and even full pouch cell batteries like those used in electric vehicles. Some must be measured while charging and discharging in real time.

Instead of working in a single geometry or setup, a “smart” robot would be able to quickly learn how to handle a wide variety of sample types that differ in shape, size, and weight, just as a human scientist would. This kind of adaptability would reduce downtime, enable continuous beamline operation, and free researchers to focus more on insights than logistics.

Take capillary samples, for example. These are typically mounted on T-shaped brackets that hold 10 to 30 capillaries each. Once loaded and aligned with the beam, the capillaries are scanned sequentially as the bracket moves vertically, allowing different regions of each sample to be measured and averaged for more reliable data. Scans are fast, with each bracket taking just five to 10 minutes, leaving users little time between sample changes. Currently, switching from a capillary containing battery material to an actual operando battery setup also requires stopping the experiment, opening the protective hutch, and manually swapping samples. An automated system could streamline these processes, but only if it’s intuitive and flexible.

For energy research in particular, this shift could be transformative. Progress in energy storage depends on the ability to screen new materials and quickly test them under real-world conditions with limited scheduled time at the beamline. Adaptive robotics at NSLS-II would dramatically accelerate that process, helping researchers develop the next generation of high-performance batteries for applications ranging from earbuds to electric vehicles.

This is only one example of the many types of experiments in several different fields that this kind of system is hoping to accelerate. As Maffettone explained, “The dream is to have smart robots that users can request on a per-beam-time basis. These applications are designed to be quickly deployed, removed, and redeployed based on the needs of the experiment while also being able to integrate AI-agent-driven automation techniques. Because of this, the robots we use would need to be light and portable, have a modular build, and plug into an accessible software infrastructure.”

Read more on NSLS-II website

Image: NSLS-II computational scientist Phillip Maffettone simulated an experimental setup to test AI-driven robotic automation.

Credit: Kevin Coughlin/Brookhaven National Laboratory

2024 – A truly remarkable year for MAX IV

Scientific output continued to increase at MAX IV during 2024, with the facility making societal contributions within areas such as life science, energy and materials science.

Delve into the results now published in our MAX IV Annual Report 2024.

Several factors converged to make 2024 a success. Some beamlines recently completed their commissioning phase and are now approaching full operation. MAX IV’s status as the first fully operational fourth-generation synchrotron continues to draw international users—particularly with other facilities still in upgrade cycles. The MAX IV 36th User Meeting, held in mid-January further highlighted this momentum, offering a dynamic mix of early-career researchers, dedicated sessions from other large-scale infrastructures, and active dialogue on industrial R&D needs. The enthusiastic atmosphere and record-high participation exemplify the diverse and growing academic and industrial communities that MAX IV serves.

Across the facility, the beamlines have proven more versatile than originally imagined, with life science experiments expanding into stations never intended for them, and proprietary beamtime breaking records, which now exceeds 1000 hours. Much of this proprietary use was driven by the pharmaceutical industry, but our organisation also observes growing interest from other sectors, reflecting a broader trend of industrial users seeking advanced characterisation methods.

Publications increased with 27 percent compared to 2023, and studies published during the year build on data from MAX IV in a broad range of scientific disciplines. Examples of studies from MAX IV users included research on climate effects of airbound particles, sustainable energy sources, exciting new types of electronics, battery development to meet increasing energy storage needs, catalysts for transforming unwanted substances into useful ones, to solutions for cleaning polluted soil and water, more durable and lighter materials for transport, understanding diseases that lack a cure today, and new medicines.

Read more on MAX IV website

HZB patent for semiconductor characterisation goes into serial production

An HZB team has developed together with Freiberg Instruments an innovative monochromator that is now being produced and marketed. The device makes it possible to quickly and continuously measure the optoelectronic properties of semiconductor materials with high precision over a broad spectral range from the near infrared to the deep ultraviolet. Stray light is efficiently suppressed. This innovation is of interest for the development of new materials and can also be used to better control industrial processes.

Electronics, power electronics, light-emitting diodes, sensors, photocatalysis and photovoltaics – these technologies are based on semiconductors with band gaps ranging from the near infrared to the deep ultraviolet. New semiconductor materials with interesting optoelectronic properties are constantly being developed. In particular, the spectrally dependent photoelectric characterisation of semiconductor materials requires light sources whose photon energy can be continuously varied. Such light sources consist of a lamp, which emits light over a broad spectral range, and a monochromator, which filters out light in narrow spectral ranges. Until now, only diffraction grating monochromators have been used commercially, requiring up to five different diffraction gratings to cover a wide spectral range.

Mirrorless double prism monochromator

At the HZB, a team led by Dr. Thomas Dittrich, in collaboration with HEREON, has now developed a mirrorless double prism monochromator based on fused silica (quartz glass). Since fused silica is transparent in a spectral range from about 0.4 to over 7.3 eV, light can be spectrally dispersed over this range with just one fused silica prism. A first prototype was realised together with Freiberg Instruments. The novel, now patented, monochromator consists of a fused silica optics with two prisms and some lenses, where in addition to the dispersion-dependent rotation of the prisms, a precise adjustment of the lenses is done via stepper motors. A laser-driven xenon lamp provides high light intensities even in the deep ultraviolet.

Fast characterisation

The new monochromator makes it possible to determine the optoelectronic and optical properties of semiconductor materials in a single continuous measurement over a very wide spectral range from the near infrared to the deep ultraviolet. An additional advantage: stray light is suppressed very strongly (by more than eight orders of magnitude), which makes the monochromator particularly suitable for the photoelectric characterisation of defects in semiconductors. Due to its high intensity even in the deep ultraviolet, the monochromator is also excellently suited for the characterisation of semiconductor materials with wide or ultra-wide band gaps, such as silicon carbide and gallium oxide for high-performance electronics, diamond for IT technologies and gallium nitride for optoelectronics. With the new compact monochromator, for example, it is now possible for the first time to characterise defect states across almost the entire band gap of aluminium nitride in just a few minutes.

Read more on HZB website

Image: The patented monochromator consists of quartz glass optics with two prisms and a few lenses. The picture shows the central slit, the intermediate lens and the second prism with green reflections in the background.

Credit: T. Dittrich / HZB

Synchrotron Radiation News Volume 38 – call schedule for 2025

Synchrotron Radiation News (SRN) is a bimonthly magazine that publishes latest news related to research on synchrotron facilities, meeting reports, upcoming conferences, and new products.
SRN invites contributions to Volume 38. Please find SRN’s call schedule below, and direct any questions or requests to contribute to Andrea Taylor, SRN Commissioning Editor, at Andrea Taylor altaylorsrn@gmail.com.

BESSY II: How pulsed charging enhances the service time of batteries

An improved charging protocol might help lithium-ion batteries to last much longer. Charging with a high-frequency pulsed current reduces ageing effects, an international team demonstrated. The study was led by Philipp Adelhelm (HZB and Humboldt University) in collaboration with teams from the Technical University of Berlin and Aalborg University in Denmark. Experiments at the X-ray source BESSY II were particularly revealing.

Ageing effects analysed

Lithium-ion batteries are powerful, and they are used everywhere, from electric vehicles to electronic devices. However, their capacity gradually decreases over the course of hundreds of charging cycles. The best commercial lithium-ion batteries with electrodes made of so-called NMC532 (molecular formula: LiNi0.5Mn0.3Co0.2O2) and graphite have a service life of up to eight years. Batteries are usually charged with a constant current flow. But is this really the most favourable method? A new study by Prof Philipp Adelhelm’s group at HZB and Humboldt-University Berlin answers this question clearly with no. The study in the journal Advanced Energy Materials analyses the effect of the charging protocol on the service time of the battery.

Part of the battery tests were carried out at Aalborg University. The batteries were either charged conventionally with constant current (CC) or with a new charging protocol with pulsed current (PC). Post-mortem analyses revealed clear differences after several charging cycles: In the CC samples, the solid electrolyte interface (SEI) at the anode was significantly thicker, which impaired the capacity. The team also found more cracks in the structure of the NMC532 and graphite electrodes, which also contributed to the loss of capacity. In contrast, PC-charging led to a thinner SEI interface and fewer structural changes in the electrode materials.

Read more on HZB website

Scientists capture a ‘quantum tug’ between neighbouring water molecules

The work sheds light on the web of hydrogen bonds that gives water its strange properties, which play a vital role in many chemical and biological processes.

Water is the most abundant yet least understood liquid in nature. It exhibits many strange behaviors that scientists still struggle to explain. While most liquids get denser as they get colder, water is most dense at 39 degrees Fahrenheit, just above its freezing point. This is why ice floats to the top of a drinking glass and lakes freeze from the surface down, allowing marine life to survive cold winters. Water also has an unusually high surface tension, allowing insects to walk on its surface, and a large capacity to store heat, keeping ocean temperatures stable.

Now, a team that includes researchers from the Department of Energy’s SLAC National Accelerator Laboratory, Stanford University and Stockholm University in Sweden have made the first direct observation of how hydrogen atoms in water molecules tug and push neighbouring water molecules when they are excited with laser light. Their results, published in Nature today, reveal effects that could underpin key aspects of the microscopic origin of water’s strange properties and could lead to a better understanding of how water helps proteins function in living organisms.

Read more on the LCLS website

Image: For these experiments, the research team (left to right: Xiaozhe Shen, Pedro Nunes, Jie Yang and Xijie Wang) used SLAC’s MeV-UED, a high-speed “electron camera” that uses a powerful beam of electrons to detect subtle molecular movements in samples.

Credit: Dawn Harmer/SLAC National Accelerator Laboratory

WE18 FERMI Slider

The program of construction and commissioning through user experiments of the FEL source FERMI, the only FEL user facility in the world currently exploiting external seeding to offer intensity, wavelength and line width stability, achieved all of its intended targets in 2017.

WE16 SSRL Slider

The Stanford Synchrotron Radiation Lightsource (SSRL) is one of the pioneering synchrotron facilities in the world, known for outstanding user support, training future generations and important contributions to science and instrumentation. SSRL is an Office of Science User Facility operated for the U.S. Department of Energy by Stanford University.

WE16 NSRRC Slider

Taiwan Light Source (TLS, 1.5 GeV) and Taiwan Photon Source (TPS, 3.0 GeV) are the two synchrotron light sources currently operated by the National Synchrotron Radiation Research Center (NSRRC). There are around 13,000 academic user visits to NSRRC every year; approximately 10% are international.