To watch and celebrate the start up of the LHC earlier this week, Fermilab staff, scientists, media and local physics enthusiasts gathered at the laboratory Wednesday morning for a Pajama Party, an aptly named middle-of-the-night event. While not everyone took the pajama part seriously, there were about 100 people who showed up in their sleepwear.
Fermilab staff captured some photos of pj party attendees in their slumber gear--everything from animal print to the full-footy pajama. Some highlights are below.
![Fermilab Deputy Director Young-Kee Kim poses in her red footy pajamas with CMS scientist Joel Butler, accelerator scientist Joe Lykken (in silk robe) and CMS scientist Lothar Bauerdick (in full robe and pajamas at right).](http://www.fnal.gov/pub/today/images08/Pajamapartyscientistgroup-s.jpg)
Fermilab Deputy Director Young-Kee Kim poses in her red footy pajamas with scientists Joel Butler, Joe Lykken (in silk robe) and Lothar Bauerdick (in full robe and pajamas at right).
![](http://www.fnal.gov/pub/today/images08/PajamapartyFortnerWester-s.jpg)
Fermilab scientist William Wester takes a walk on the wild side in his tiger-print robe. Wester poses with State Representative and DZero collaborator Mike Fortner.
![](http://www.fnal.gov/pub/today/images08/PajamapartyPJphoto-s.jpg)
A group of pajama-clad Fermilab employees and physics enthusiasts poses for a group photo Wednesday, during the pajama party.
![Paddy Fox, a Fermilab theorist, wore a bathrobe and a towel to the Pajama Party. The towel is a reference to Douglas Adam's novel "The Hitchhiker's Guide to the Galaxy," where Douglas calls a towel the most massively useful thing an interstellar hitchhiker can have.](http://www.fnal.gov/pub/today/images08/pajamapartyROCtowel-s.jpg)
Paddy Fox, a Fermilab theorist, wore a bathrobe and a towel to the Pajama Party. The towel is a reference to Douglas Adam's novel "The Hitchhiker's Guide to the Galaxy," where Douglas calls a towel the most massively useful thing an interstellar hitchhiker can have. Image courtesy of Sebastian Szyszka.