DOE x‐ray light sources facilities such as the Advanced Photon Source, the LINAC Coherent Light Source and the Advanced Light Source are undergoing major upgrades to increase the source brightness and enable groundbreaking science, based on laser‐like high coherent flux. The Diffraction‐limited Radiation Enhancement with Adaptive Mirrors (DREAM) project takes advantage of recent technological developments in the field of x‐ray adaptive optics to shape and control coherent x‐ray wavefronts at the nanometer level, tuning their properties in novel ways.
This work will develop automated beamline alignment procedures using adaptive optics to achieve optimal performance during routine user operation, using machine learning procedures. It will also seek the tighter integration of beamlines with their experimental endstations, demonstrating dynamic x‐ray sample illumination for high‐throughput data collection and autonomous experiments. The project will explore the use of adaptive optics to engineer wavefronts to give rise to new contrast mechanisms and higher sensitivity in experiments, tuning the phase of the light when it interacts with the sample.
The DREAM beam project represents a critical, collaborative step forward toward enabling high‐speed experiments for in‐operando studies of new micro‐electronics, quantum devices, or batteries.
This is a project over five years, with the following goals:
Xiaoya Chong (November 2023) joins the Dream Team
We are pleased to welcome Dr. Xiaoya Chong in the ALS Dream Team. Dr. Chong joins the team as a postdoctoral fellow and she will work on machine learning techniques for automated alignment of soft x-ray beamlines, in collaboration with the ALS Computing team (Alex Hexemer and Tanny Chavez) and the MLExchange Project. She recently earned her PhD from the Department of Computer Science at the City University of Hong Kong.
Xiaoya Chong, new ALS Dream Team member
Dream Team intern Bryan Ochoa (August 2023)
Bryan Ochoa wins best poster from Berkeley Lab summer intern competition
Automated alignment experiments at the Advanced Light Source
We performed automated alignment experiments at ALS beamline 5.3.1 in collaboration with Tom Morris from NSLS-II and Boaz Nash from Radiasoft, based on blop-tools based on gaussian processed.
We were able to successfully optimize the size of the x-ray beam and reach the optimal beam size, despite the many coupled degrees of freedom and the presence of many apertures in the beamline. This work paves the way for further developpments including wavefront sensor and adaptive optics.
Tanny Chavez, Grace Luo, Tom Morris, Boaz Nash and Antoine Wojdyla at ALS Beamline 5.3.1
Teachers and studencts from Beamline and Optical Modelling School (BLOMS 2023) at Berkeley Lab, in Berkeley, CA –May 2023.
Successful Beamline and Optical Modelling School!
We co-organized (Antoine Wojdyla. Ken Golderg, Andrea Taylor) the Beamline and Optical Modelling School, May 30–June 1, 2023 in Berkeley California.
We taught the basics of beamline design and simulation, with tools such as Shadow, xoppy, Oasys, SRW and sirepo.,We had over 70 participants from many countries, half in person and half remote, due to limited capacity.
A full summary of the event:
Beamline Optics and Modeling School (BLOMS) 2023 –ALS news
Wavefront sensing and adaptive optics experiment at the Advanced Photon Source
We travelled to the Advanced Photon Source to perform experimental validation of the ALS-U reflective wavefront sensor at higher energy (above 8 keV), and demonstrated that it worked over a wide range of photon energy, while benchmarking the results with the coded mask technique developped by our collaborators.
Xianbo Shi, Antoine Wojdyla, Matt Frith, Ken Goldberg, Matt Highland and Diane Bryant at APS ID-28 "IDEA" beamline (April 2023)