Difference between revisions of "Qweak Installation"
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The charge collector strips are less than 0.4 mm wide. But the concentric strip can give you a direct measurements of the <math>\theta</math> angle if they are properly alignment with the beam line. | The charge collector strips are less than 0.4 mm wide. But the concentric strip can give you a direct measurements of the <math>\theta</math> angle if they are properly alignment with the beam line. | ||
| + | |||
| + | |||
| + | Tolorance for GEM relative to the beam line center | ||
| + | |||
{| border="1" |cellpadding="20" cellspacing="0 | {| border="1" |cellpadding="20" cellspacing="0 | ||
| Line 31: | Line 35: | ||
| || (mm) || (mm)|| (mm) | | || (mm) || (mm)|| (mm) | ||
|- | |- | ||
| − | | X ||0.2 ||0.4 || | + | | X || 0.2 ||0.4 || 0.2 |
|- | |- | ||
| − | | Y || 0.2|| 0.4|| | + | | Y ||0.2 || 0.4|| 0.2 |
|- | |- | ||
| − | | Z ||10 ||1 | + | | Z ||1 ||10 || 1 |
|- | |- | ||
| Yaw(about Y) || || || | | Yaw(about Y) || || || | ||
Revision as of 19:18, 7 May 2008
Information for installing the R1 chambers into Hall C
Target Date
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. But the concentric strip can give you a direct measurements of the angle if they are properly alignment with the beam line.
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) |