Taggers installation for 1996.

Yu.Soloviev, 15-Apr-1996

 Etag33 and Etag44 are installed in HERA tunnel.
 Their geometry is different from what it was in 1995, as detailed below.
 
ET33
 The distance from e beam axis to the center of Etag33 is now 155.3 mm
 instead of 159.9 mm in the year 1995. The distance from e beam pipe wall
 to the center of Etag33 is 123.4 mm (see sketch).
 In addition,  Etag33 is now parallel to the e beam axis (+-2 mrad).
 
ET44
 The wall of the Etag44, close to the beam pipe, is replaced by a thiner
 one (0.8 mm compared to 2 mm in year 1995). The assembly of the crystals
 is shifted to the new wall. Consiquently, the distance between beam pipe
 wall and the center of the crystal assembly is 25.8 mm (see sketch).
 
Dosimeters
 21 dosimeters are installed at Etag33, Etag44, Etag7 (prototype of future
 ET_08) and the Photon arm. This is the installation MAP.