7/28/06: This is all very old
stuff. It remains here only for archival purposes.
10/07/02: Collimators were removed and reinstalled during the summer of 2002. New survey measurement results are available. Click here
10/10/00: New survey measurement results are now available see: http://hallaweb.jlab.org/news/minutes/sieves_2000.htm
Latest best Old estimate of target to collimator/sieve distance.
(from
survey reports 483r and 359)
3/17/99 -JJL
|
Electron Large Collimator |
Electron Sieve |
Hadron Large Collimator |
Hadron Sieve |
± errors |
|
1109 |
1183.4 |
1100 |
1174.5 |
2 mm |
For a discussion of the present status of the sieve offsets see: http://hallaweb.jlab.org/news/minutes/sieves_2000.htm
Older information can still be found at: http://hallaweb.jlab.org/news/minutes/sieve-offsets.html
Please send comments or questions to John LeRose: lerose@jlab.org