Author Archives: Antoine

Dream beam

I am very happy to announce that was granted en Early Career Research Award by the US Department of Energy, to work on the DREAM beam: Diffraction-limited Radiation Enhancement with Adaptive Mirrors for x-ray coherent beamlines.

Here are some news releases:

They may say I’m a dreamer, but I’m not the only one

Continue reading

Competes

Yesterday we received a visit of the speaker of the House, Nancy Pelosi, who came to Berkeley lab for a press conference around the COMPETES act, which aims to bolster STEM education in the US and revive semiconductor manufacturing.

Full video: Speaker Pelosi Holds Event on America COMPETES Act

When people ask me what are the answers to some of the challenges that we face, I always say the same thing: Science, Science, Science and Science – Nancy Pelosi

We are quite honored that she chose the Advanced Light Source as backdrop for the announcement. There were also other congresswomen Barbara Lee and Doris Matsui, together with Intel CEO Pat Gelsinger and UC President Michael Drake.

Nancy Pelosi speaking in front of the Advanced Light Source

That day felt almost normal – I haven’t seen that many people from the lab in two years. And at the same time, the situation was quite absurd: me right here, among people with the power to change science, at the dawn of WWIII.

Continue reading

Tandem listen

Songs have this ability to make me travel in the past. Every time I hear a song I like, I can associate a corresponding time in my life. This is very helpful to keep track of seasons, especially at a time where it’s hard to separate events from each other, where even the concept of event has become some blurry. I was going through my Spotify playlists lately , and each playlist tells a story: of elation, of break ups; of happiness and of sadness.

I also like to put songs together, to bend the passing of time and bring together eras and ideas. Here’s a list of tandem listen I curated. I hope you’ll enjoy these pairings!

I love skyrmions

Tandem #1: Obamas
No Man Is Big Enough for My Arms, Ibeyi
https://www.youtube.com/watch?v=AzxDKqdfPr0
Una Rosa Blanca, Ibrahim Maalouf
https://www.youtube.com/watch?v=EY2CGLWpkuI

Tandem #2: Strangers
Stranger, Anna van Hausswolff
https://www.youtube.com/watch?v=DbjkjTsOKx8
Stranger, Portishead
https://www.youtube.com/watch?v=HbSu2UM8kcQ

Continue reading

Scientists on screen

There isn’t much representation of scientists in popular culture, with a only few movies standing out, such as a “A Beautiful Mind” (on John Nash) or “Good Will Hunting.” There’s been a few more in the biopic genre lately, such as the “Imitation Game” on Alan Turing or “The Theory of Everything” on Stephen Hawking, and soon a movie on Robert Oppenheimer by Chris Nolan.

But the representation of women in science and technology is even less frequent. Things seem to be changing, and during the pandemic there’s been a few biopics on women scientists, to which I want to bring attention to:

(credit: @truffleduster)

All of them have been deprived of a theatrical release, and I find it a bit sad they haven’t been delayed, but perhaps there’s been increased distribution through streaming platforms.
I should also mention slightly older movies such as “Hidden Figures“, “Contact“, “Arrival” and “Interstellar” – surprisingly all about space exploration.
Why can’t we see beakers, petri dishes and lasers?

Poetry interlude

During the pandemic, I had the leisure to read more poetry, and revisit some poems that I have enjoyed over the years. Here’s a small selection: they’re mostly about love, for it is the most pleasant subject of poetry and something that philosophy isn’t capable to treat seriously (see Poetry as philosophy in action.)

Waterfalls – Thomas Danthony

We’ll start by English poets, with Lord Byron, a giant of poetry (where I came to by way of Stendhal):

6.
Perhaps the workings of defiance stir
Within me—or perhaps a cold despair,
Brought on when ills habitually recur,
Perhaps a kinder clime, or purer air
(For even to this may change of soul refer,
And with light armour we may learn to bear),
Have taught me a strange quiet, which was not
The chief companion of a calmer lot.

Lord Byron – Epistle to Augusta

Continue reading

Friendly podcasts

We’re almost out of the pandemic, and it seems that a lot of people around me are starting podcasts. Here are three podcasts from friends or looser acquaintances that I found very entertaining. Check them out!

  • A Slight Change of Plans, by Maya Shankar, where she interviews people who have been through a life changing episode.
  • Lab to Startup, by Naresh Sunkara, where he talks about how scientists can create successful startups, interviewing those who crossed the chasm, and listing all the resources available to trained scientists (incubators and other programs)
  • Am I normal, by Mona Chalabi, where she takes somehow very personal subjects and does a deep dive into the numbers and interviews people who have done their research!

tried and tested

I must confess I did try to start a podcast, inspired by my favorite French show “Remède à la mélancolie” (now reborn as “L’Embellie“) I did two episode, but I quickly realized that would take much more effort than I thought if I wanted to get anywhere…

Among other podcast I listen to regularly: Science en question and  Femmes puissantes (both in French, I hope there was an English version of these great shows! French public radio is awesome – see La black liste for excellent soul music and and Si l’Amerique m’etait contée for a history of America)

EUV lithography makes headlines

EUV lithography is now part of everything – including the chips in your iPhone 12 and beyond. I don’t know if it’s because of the chip shortage, the $50B investment of the US government in semiconductor manufacturing, or the realization that having a nearly monopolistic market with its biggest player in Taiwan, at the mercy of an invasion, but there’s a lot of press on EUV lithography right now (I’ve been talking about my work on the topic at Berkeley Lab here: SHARP and MET5, and shared some thoughts on Moore’s law here.)

Me at the inaugural Berkeley Lab Slam (2016), talking about EUV lithography

Here’s a few pieces:

In this story, ASML is the quiet powerhouse – they have a de facto monopoly (their stock rose 10x over the last 5 years) and they keep expanding (ASML opens new state-of-the-art R&D facility in Silicon Valley.) There’s been some hardball played here, with the US pressuring the European company not to sell their technology with China (Reuters), as if it made any sense.

Besides, I am stoked to see my former colleagues from the Center for X-Ray Optics receive recognition for their work!

I hope we’ll get to develop new techniques with x-rays using diffraction-limited beams to further the advances in semiconductors and microchips – skyrmions, superconductivity, memristors, and so many other cool things!

power spectral density of an EUV coherent beam reflected on a naturally rough surface going through an objective zoneplate with a topological charge of 1

Origami

I recently read the amazing book “New Expressions in Origami Art” by Meher McArthur, that I found at the shop Paper Tree in the Japan Town of San Fransisco (it’s one of my favorite shops; they always have stunning origami on display, some for sale, from many origamists featured in the book.)

Every page of the book is a delight, where a modern twists (abstraction, wet folding, tessellation) on origami always bring something very fresh.

One Crease, by Paul Jackson

While reading the book and learning about Goran Konjevod (who seems to be a colleague from Lawrence Livermore National Laboratory), I stumbled on the work of Amanda Ghassaei, who has created the Origami Simulator and many other cool simulation tools producing mesmerizing results.

https://twitter.com/amandaghassaei/status/1352605937077522434

Continue reading

Plans for the roaring 20’s

I was recently featured twice by Berkeley Lab, first about my work on ALS-U:
Berkeley Lab The Next 90 – Accelerators: Conversation with Antoine Wojdyla.

It was a nice occasion to pay tribute to my grandpa and my grandmother, who passed away last month, and give some representation to the people from the Caribbean. And also explain what I do, and what I’m dreaming up.

Incidentally, I had to clear out my grandparents house, and set foot in his shop, where he was cutting glass and carving wood. In a way, that’s what I am doing right now, studying mirrors and carving out matter, albeit with tighter tolerances.

My grandpa’s shop stockroom (August 2021)

I also had an occasion to share with my colleague Alisa our vision for the Global ERG, which is an association at Berkeley Lab whose goal is to help out international colleagues – many of those who joined lately barely had a chance to meet anyone.
Berkeley Lab The Next 90 – Global ERG: Conversation with Antoine Wojdyla and Alisa Bettale

The scourge of sargassum

I am currently on the island of Saint-Martin, in the French West Indies, about 200 miles away from Puerto Rico, because I couldn’t fly back directly from France, which is still under a Travel Ban order from the US. I have two spend at least two weeks so that I can fly back to Berkeley.

Saint Martin on the map

Walking on beach, it is sad to discover that is littered with sargassum, an invasive algae that barely existed when I was walking my dogs on the beach many years ago. This infestation is quite recent in fact, and somehow started in 2011 (see the excellent piece in The Atlantic by pre-Pulitzer Ed Yong: Why waves of seaweed have been smothering Caribbean beaches.)

Sargassum on Orient Bay, fresh and old (September 2021)

It appears that the bloom may come from the increase in nutrients carried by the Amazon river and making it to the ocean (The great Atlantic Sargassum belt.) Apparently, the problem is becoming more and more acute, and I’ve recently learned that researchers (like my colleagues at Berkeley Lab Lydia Rachbauer) are trying to find enzymes in fish that can actually digest these algae.

Because these algae float in the water, they are effectively a a mix of large floating solar panels, and a potentially a great resource of biofuels, where nothing is needed, since the nutrients are provided for free by farmers from the Amazon river. Apparently, there are companies such as C-combinator who are trying to extract the energy from these algae. I can’t really judge if the economics makes sense (harvesting the algae might be complicated, though they seem very easily visible on satellite images so that might help), but developing adequate techniques for a problem that may blow up seems a good idea.

Continue reading