VDS Alignment

The alignment is done offline and decoupled from ARTE.



The results are stored in ASCII files. All of them can be found in

~braeuer/public/gedeXX/

where XX is 02 or 03 giving the experiment number.



"Since the VDS geometry can be changed by the manipulators, a ZERO geometry

or NEDE is difficult to give. The TDR positions are to some extend only of

theoretical interest since the system has to meet the strict requirements of a safe

operation of the HERA accelerator". A list of alignment files for monte carlo are

listed below.



Naming scheme

All files has the following naming schemme:

gede.[run number]_[version number][xyz]RWA





For MC-production the following translation table (from S. Schaller) should

be used to relate HERA-B MC versions to alignment tables:

xyz gvers/sis

gede.11685xyz_2RWA : 99.1101/sis991101.dat & 99.1202/sis991202.dat

gede.xyz13406_5RWA : 99.1325/sis991325.dat

gede.14023_2xyzRWA : 99.0810/sis990810.dat

gede.14434_2xyzRWA : 99.0811/sis990811.dat 99.0812/sis990812.dat & 01.0701+01.1116/sis010812.dat



Author: M.Braeuer (Edited by F.Sanchez) December 2001.