Geometrical Measurement of the Pibeta Detector

The Pion Beta Detector has been measured by the PSI surveying group on 29 April 1999. Here are is the protocol of this measurement. We see, that upstream and downstream side are on the same height, centerheight at about 1506 mm over floor. The centering of the target position is reproducable and it is centered to the detector z-axis to about 0.5 mm.

Station 1. Position 2. Position mean red mean remark
Point R V Z H  
           
Floor 1508.83     0.00 N3 2m Latte No 2
(upstream)          
Screws Center 1.73     1507.10  
(upstream)          
Center Target Downstream 1.80     1507.03  
           
           
Floor 1511.02     0.00  
(downstream)          
screw center right 4.35     1506.67  
(downstream)          
           
           
Theodolit on axis         TC 2002
Hz          
           
axis 0.0000 100.1211      
target center         DH 3600
L 399.5906     399.5882  
R 0.3924 399.9915   0.3935 left 0.5 mm
U   99.6915   99.7101  
D   100.4980 100.0948 100.5154 up 1.5 mm
           
after correction target          
           
L 399.5882     399.5882  
R 0.3935 399.9909   0.3935 left 0.5 mm
U   99.7101   99.7101  
D   100.5154 100.1128 100.5154 up 0.5 mm

Last Updated on 4/30/99
By H. Peter Wirtz
Email: hp.wirtz@psi.ch