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phase2:modules
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| phase2:modules [2015/01/27 16:54] – dsalerno | phase2:modules [2015/01/28 09:58] (current) – dsalerno | ||
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| ====== Titled modules ====== | ====== Titled modules ====== | ||
| - | We can tilt the pixel barrel modules by specifying the coordinates of each module. The syntax is as follows: | + | We can tilt the pixel barrel modules |
| Barrel PXB { | Barrel PXB { | ||
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| Note: maxZ needs to be less than the Zcoord of the last module in the csv file. | Note: maxZ needs to be less than the Zcoord of the last module in the csv file. | ||
| - | The csv file of module coordinates must have 7 columns and as many rows as modules in a rod. Each row has the coordinates of a double | + | The csv file of module coordinates must have 7 columns and as many rows as modules in a rod. Each row has the coordinates of an inner and outer module |
| 68 0 | 68 0 | ||
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| 68 210 30 70 210 30 24 | 68 210 30 70 210 30 24 | ||
| + | {{: | ||
| + | |||
| + | End cap modules cannot be tilted around their transverse axis. This is an excerpt from the tkLayout paper: | ||
| + | |||
| + | Modules can be rotated around their longitudinal axis by a skew angle α. This effectively | ||
| + | increases the resolution seen by tracks by a factor cos(α), but, on the other hand, reduces the | ||
| + | φ-aperture by the same amount. | ||
| + | tkLayout also supports rotating barrel modules around their transverse axis by a tilt angle β, | ||
| + | in a layout called “tilted barrel” (see figure 6), where barrel modules are increasingly tilted the | ||
| + | further they are on the z axis (up to β = π/2 when they effectively become endcap modules). The | ||
| + | advantage of the tilted layout is that the modules’ aperture in θ (the angle relative to the beam | ||
| + | axis) is increased, so the number of modules to cover the same volume is reduced, to the benefit of | ||
| + | material amount and cost. | ||
phase2/modules.1422374088.txt.gz · Last modified: by dsalerno
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