Qweak Installation

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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 strips can give you a direct measurement of the electron scattering angle [math]\theta[/math] 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)


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