FINAL DETECTOR POSITIONS - February 11, 1999


	z-Positions [mm] of Superlayers in Vertex Detector:
	===================================================

	Nominal positions of target wires are at z = -50 mm 
	and at z = 0 mm.

	(1)   Number of superlayer
	(2)   Center of superlayer 
	(3)   Center of top & bottom quadrant
	(4)   Center of left & right quadrant 


	 (1)   (2)    (3)    (4)

	  1     96     86    106
	  2    149    139    159
	  3    218    208    228
	  4    392.5  382.5  402.5
	  5    630.5  620.5  640.5
	  6   1008    998   1018
	  7   1529   1519   1539
         [8   2000   1990   2010   - may be still subject to change ]
	 
	History: Compared to the positions listed in file 
	         [ktkno.ml]dpos_new.file, positions of
		 superlayers (SLs) 1, 3, 4 and 5 have been
		 shifted by Delta z as follows:
		  		     
			SL 1 : Delta z = +16.0 mm  
		  	SL 3 : Delta z = -16.0 mm  
		  	SL 4 : Delta z = +13.5 mm  
		  	SL 5 : Delta z = +13.5 mm  
 

	Relation of coordinates in the Vertex Detector and Vessel System
	================================================================

	See drawing MPI VDS 1.032.4  !

	In Vertex Detector coordinates the end of the BARE vessel 
	(NO endflange) is at z = 1519 + 491 = 1539 + 471 = 2010 mm.
	
	In the vessel coordinate system, the end of the vessel is at 
	z_vessel = 0, and orientation of z-axis is opposite to that 
	in the Vertex Detector coordinate system.
	
	==>	z_Vertex_Detector = 2010 mm - z_vessel    <==