La Palma’s Cherenkov Telescopes Reach Key Construction Milestone
The LST-2 telescope of the Cherenkov Telescope Array (CTA) has successfully completed the installation of its Camera Support Structure (CSS), becoming the last of four Large-Sized Telescopes (LSTs) to reach this pivotal construction milestone at the Roque de los Muchachos Observatory (ORM) in La Palma. Operated by the Instituto de Astrofísica de Canarias (IAC), the site is now one step closer to hosting the world’s largest gamma-ray detection network.
Engineering Marvel: The Camera Support Structure
The newly installed CSS is a parabolic carbon fiber arc that holds the telescope’s camera above the primary mirror. This lightweight yet ultra-stable material minimizes shadow interference while ensuring structural integrity. With this addition, the four LST telescopes now boast their final, awe-inspiring configuration—a testament to cutting-edge astronomical engineering.
International Collaboration Behind the Scenes
The CSS was designed by France’s LAPP, with components produced by Lorima, a specialist in competitive sailing masts. Installation required precision at 50 meters above ground, using 26 composite tensioners from Future Fibres, secured via Italy’s INFN-Padua. The delicate crane-release maneuver demanded years of specialized climbing training for the technical team.
Next Steps Toward Scientific Operations
After CSS installation, the IAC will oversee final mechanical adjustments, including azimuth brake installation and telescope positioning. The scientific phase begins next, with cameras for LST-3 and LST-2 slated for assembly in 2024. Environmental commitments include dismantling temporary work platforms by 2026.
A New Era for Astrophysics
Ramón García López, IAC’s CTAO lead researcher, highlights the milestone: “Completing the LST-2’s mechanical structure brings us closer to commissioning the northern hemisphere’s premier gamma-ray observatory.” The CTAO project, co-funded by the EU and Canarian government, promises to revolutionize high-energy astrophysics and cement the Canary Islands’ global scientific standing.
