The alignment is done offline and decoupled from ARTE.
The results are stored in ASCII files. All of them can be found in
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
All files has the following naming schemme:
gede.[run number]_[version number][xyz]RWA
[run number] for which the alignemen is done.
[version number] (for internal use only), the highest number is the valid one.
[xyz] indicates that no rotational corrections of modules are done.
For MC-production the following translation table (from S. Schaller) should
be used to relate HERA-B MC versions to alignment tables:
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.