Author Archives: Antoine

Sausalito

Life upgrade: I moved to Sausalito!

It’s pretty nice out there, living just across the marina, stand up paddling with my partner at sunset, and sailing through the bay on foggy days.

1000 days

Today is the thousandth day since the start of the pandemic, and we still haven’t figured out how to hold efficient meetings online.Here’s a useful resource:

A practical guide to Remote & Hybrid Communications – Berkeley Executive Education
https://drive.google.com/file/d/14ztjFkkKQGHK-HOtebUOtu-Lpa3DanVt/view

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Using machine learning to achieve diffraction-limited performance with x-rays deformable mirrors

In a our last paper, we present the use of machine learning to get the most of x-ray adaptive optics – and it works like magic! This was a great work accomplished by Gautam Gunjala, a grad student from UC Berkeley under a SCGSR grant, together with our wonderful colleagues from the Advanced Photon Source.

X-ray adaptive mirrors are very nice, because they allow to correct the shape of x-ray beams, when the beam gets distorted by mirror deformation or misalignment. That’s why we want to use them in the latest generation of synchrotron light source such as ALS-U or APS-U.

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Solar winds

If only I, too, had eight arms!

A sculpture of Durga, wife of Shiva, at the Asian Art Museum in San Francisco

ALS-U CD-3

The Advanced Light Source upgrade project has received the Critical Decision 3, the very last step before we start building the facility – a $590M project for the US Department of Energy.

This is a great news for the facility, which will become the brightest soft x-ray light source in the world. I have worked on this project over the last five years, designing and simulating the new feature beamlines and developing new technologies to ensure optimal performance.

Berkeley Lab news center: Advanced Light Source Upgrade Approved to Start Construction

“Wavefront Preservation in Soft X-Ray Beamlines for the Advanced Light Source Upgrade.”
Antoine Wojdyla & Kenneth A. Goldberg
Synchrotron Radiation News, 34(6), 21–26 (2021).
https://doi.org/10.1080/08940886.2021.2022398

Penn State University (Fall 2022)

I had a great time at Penn State University, where I was positively impressed by the facilities and the people!

I mainly visited the Material Research Institute and the department of Astronomy and Astrophysics, where they are developing x-ray adaptive optics for space application together with NASA, for the Lynx project.

Millennium Science Center, Penn State University (November 2022)

Thanks Susan Trolier-McKinstry for hosting me!

Angela Saini at Berkeley Lab

We were pleased, as Berkeley Lab Global Employee Resource Group co-chairs, to invite and co-organize with Angela Saini at Berkeley Lab on November 9th, 2022.

Author Angela Saini in conversation with Aditi Chakravarti from the Diversity and Inclusion office at Berkeley Lab (IDEA)

More details about the event:
global.lbl.gov/events/idea-speakers-series-angela-saini

Go with the flow

I discover the beautiful fluid motion videos from Yahya Modarres-Sadeghi of the Fluid-Structure Interaction Lab at UAmherst:

fluid speckle (by Modarres-Sadeghi, FSI/UAmherst)

These images and videos just show us how much information can be gained from a random signal (the marbled incoming flow) when it is coherent (linear flow) preserve correlation in space and time.

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Alain sous tous ses Aspect

Alain Aspect just received an amply deserved Nobel prize in Physics – adding one drawing to my collection of Nobel Prize drawings

Drawing by Alain Aspect (2010)

I recall bumping on him at the cafeteria at Ecole Polytechnique back in the days, and asking him questions which he often dismissed in two sentences…

Incidentally, the last time I went there in December 2019 to visit my friend Franck Delmotte (Director of study at Institute of Optics Graduate School), he was just besides us.

Alain Aspect at the Ecole Polytechnique cafeteria on December 17, 2019

Moment of pride

We won the San Francisco pride… Say it Loud: Lab Wins Pride Parade Award