Difference between revisions of "Qweak Installation"
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=Target Date= | =Target Date= | ||
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| + | The target date to install the R1 chambers in Hall C is | ||
=Definitions= | =Definitions= | ||
Revision as of 19:21, 7 May 2008
Information for installing the R1 chambers into Hall C
Target Date
The target date to install the R1 chambers in Hall C is
Definitions
- Survey tolorance
- The accuracy in the absolute location of an object
- Alignment Tolerance
- The accuracy of an object relative some other known object.
- "Would like to"
- desired alignment accuracy
- "Must have"
- Required alignment accuracy
- "Known to"
- desired survey accuracy
Tolorances
The charge collector strips are less than 0.4 mm wide. The concentric strips can give you a direct measurement of the electron scattering angle if they are properly alignment with the beam line.
The numbers below are just a Guess with no justification from a simulation or hand calculation.
Tolorance for GEM relative to the beam line center
| Coordinate | "Would like to" | "Must have" | Known to |
| (mm) | (mm) | (mm) | |
| X | 0.2 | 0.4 | 0.2 |
| Y | 0.2 | 0.4 | 0.2 |
| Z | 1 | 10 | 1 |
| Yaw(about Y) | |||
| Pitch (about X) | |||
| Roll(about Z) |