Difference between revisions of "BigBite Spectrometer"
From Hall A Wiki
(→Electron Package) |
(Added BB survey report) |
||
| Line 23: | Line 23: | ||
== Position Survey == | == Position Survey == | ||
| − | === Sept 18 | + | === Sept 18, 2008 === |
''Notice'': Terminology used in this section follows conventions of Hall A Tech Notes [http://hallaweb.jlab.org/publications/Technotes/files/2002/02-012.pdf JLAB-TN-02-012]: | ''Notice'': Terminology used in this section follows conventions of Hall A Tech Notes [http://hallaweb.jlab.org/publications/Technotes/files/2002/02-012.pdf JLAB-TN-02-012]: | ||
| Line 35: | Line 35: | ||
** Front Shielding Plate @Z=1.590m | ** Front Shielding Plate @Z=1.590m | ||
** At Beam Height, Edge of Bigbite Coil at Detector Side @Z=2.46m | ** At Beam Height, Edge of Bigbite Coil at Detector Side @Z=2.46m | ||
| + | |||
| + | |||
| + | === Oct. 28, 2008 === | ||
| + | * This is the date on the survey report: [[Media:DT_A1191.pdf]]. The actual survey was done closer to Oct. 14th. | ||
| + | <b>IMPORTANT NOTES:</b> | ||
| + | o The electron detector stack was moved 9cm closer to the target on Oct. 24th. That change is <i>not</i> reflected in this survey. | ||
Revision as of 10:47, 29 October 2008
Contents
BigBite dipole magnet
Electron Package
Electron package layout drawings
o Detector package with dimensions, updated by Al Gavalya 10/27/2008. side view and top view
BigBite spectrometer layout drawings, with the electron detector package
o Magnet and detector relative to target center, with dimensions, updated by Susan Esp 10/27/2008. side view pdf file
Gas Cherenkov Detector
Scintillators
Shower/Preshower Detectors
Position Survey
Sept 18, 2008
Notice: Terminology used in this section follows conventions of Hall A Tech Notes JLAB-TN-02-012:
BigBite Chamber center position are surveyed with laser markers and a hand held laser meter. Error could be between 1mm to 5mm.
- Center of 1st Chamber Outer Aluminum Plate in BigBite Target Coordinate System:
- X= -0.072m
- Y= unknown
- Z=2.862m
- Bigbite Magnetic in BigBite Target Coordinate System:
- Front Shielding Plate @Z=1.590m
- At Beam Height, Edge of Bigbite Coil at Detector Side @Z=2.46m
Oct. 28, 2008
- This is the date on the survey report: Media:DT_A1191.pdf. The actual survey was done closer to Oct. 14th.
IMPORTANT NOTES:
o The electron detector stack was moved 9cm closer to the target on Oct. 24th. That change is not reflected in this survey.
