May 2026 - Pcs-wp2 - mailing lists STRW

Postdoc position on metasurface coronagraphs for HWO and PCS
by haffert＠strw.leidenuniv.nl 14 May '26

14 May '26

Hi all, I wanted to reach out about this postdoc position that I have available in Leiden since I have not advertised it that widely. It’s focused on the development of optical metasurfaces for coronagraphs for HWO and PCS https://jobs.strw.leidenuniv.nl/2026/HaffertPD/ . I would really appreciate it if you forwarded it to anyone that you know that would be interested in it. And sorry for everyone that already got this through other channels. Met vriendelijke groet / With kind regards, Dr. Sebastiaan Haffert Assistant professor Leiden Observatory, Leiden University Einsteinweg 55, 2333 CC, Leiden, The Netherlands

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IMPORTANT update about the PCS-CEP
by haffert＠strw.leidenuniv.nl 11 May '26

11 May '26

Hi all, I just finished migrating all the code to a new github repo to remove any traces of the original pupil generation script. This was a bit cumbersome. To keep the same name of pcs-cep, I migrated the repo to pcs-cep-old. That repo contains the pipeline as developed until now. Then I made a new repo pcs-aperture which contains purely the aperture generating functions. People within the consortium and that are part of the elt-pcs organization on github should be able to access that repo and install it. The new PCS-CEP code is in pcs-cep. This new repo tries to import the pcs-aperture library to create the aperture and if it is not found it will default to using the supplied fits files. This now works seamlessly and transparently. From the user perspective there is no difference. Your task: delete the old PCS-CEP repo if you have it on your computer and install the new one. This is necessary to completely purge all possibilities of accidentally adding the pupil generation script back into the code. Thanks for staying patient with me while I fixed this issue. Met vriendelijke groet / With kind regards, Dr. Sebastiaan Haffert Assistant professor Leiden Observatory, Leiden University Einsteinweg 55, 2333 CC, Leiden, The Netherlands

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Re: Next general meeting
by haffert＠strw.leidenuniv.nl 08 May '26

08 May '26

Hi everyone, I forgot to share a meeting link for today. Here is one: https://universiteitleiden.zoom.us/j/7267353069?pwd=JQ4pnKb14HkPby0v9XJqmcg… Sebastiaan From: haffert(a)strw.leidenuniv.nl <haffert(a)strw.leidenuniv.nl> Sent: Wednesday, 22 April 2026 17:50 To: pcs-wp2(a)strw.leidenuniv.nl Subject: Next general meeting Hi all, I propose we should have our next general WP2 meeting on Friday May 8th at 10:00. Agenda: * Coordination of removing the pupil generating function for external collaborators. * Sebastiaan will present the first draft of the opto-mechanical volume envelope. * Current state of the coronagraph design call. * Current state of the wavefront sensing sub-group. * Set goals for SPIE and what we will put on the poster. Met vriendelijke groet / With kind regards, Dr. Sebastiaan Haffert Assistant professor Leiden Observatory, Leiden University Einsteinweg 55, 2333 CC, Leiden, The Netherlands

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