The assembly of the WASA 4 pi detector at the The Svedberg Laboratory in Up
psala is now completed. The superconducting solenoid, the vacuum chambers a
nd all of the sensitive parts of the detector have been installed at the CE
LSIUS accelerator and storage ring. The pellet generator, providing interna
l hydrogen (and deuterium)targets, has been installed on top of WASA. The f
irst test run together with the CELSIUS proton beam was carried through in
May 1999.