Alignment of the Near Detector scintillator modules using cosmic ray muons

Ospanov, Rustem ; Lang, Karol ; U., /Texas

Fermi National Accelerator Laboratory

关键词: Magnetic Fields;    Calorimeters;    43 Particle Accelerators;    Phosphors Accelerators;    Accelerators;   

DOI  :  10.2172/933210
RP-ID  :  FERMILAB-TM-2411-E
RP-ID  :  AC02-07CH11359
RP-ID  :  933210

美国|英语

来源: UNT Digital Library

【 摘 要 】

The authors describe the procedures and the results of the first alignment of the Near Detector. Using 15.5 million cosmic ray muon tracks, collected from October, 2004 through early january, 2005, they derive the effective transverse positions of the calorimeter scintillator modules. The residuals from straight line fits indicate that the current alignment has achieved better than 1 mm precision. They estimate the size of the remaining misalignment and using tracks recorded with a magnetic field test the effect of the magnetic field on the alignment.