| Average (eta = [0, 4.0]) | Radiation length | Interaction length |
|---|
| Beam Pipe | 0.01553 | 0.01388 |
| Services under Pixel Tracking Volume | 0.00015 | 0.00005 |
| Bumps | 0.02071 | 0.00084 |
| Cooling blocks | 0.00629 | 0.00211 |
| Pixel Support plate | 0.00807 | 0.00444 |
| Pixel hybrid | 0.08293 | 0.01425 |
| Pixel sensor | 0.01614 | 0.00325 |
| Services in Pixel Tracking Volume | 0.04694 | 0.01447 |
| Supports in Pixel Tracking Volume | 0.00617 | 0.00328 |
| Services and supports in interstice | 0.06953 | 0.02846 |
| 2S FE hybrid circuits | 0.00708 | 0.00204 |
| 2S FE hybrid spacers 1.8 mm | 0.00072 | 0.00027 |
| 2S FE hybrid spacers 4.0 mm | 0.00011 | 0.00004 |
| 2S Inactive silicon | 0.00044 | 0.00009 |
| 2S Module Supports | 0.00439 | 0.00111 |
| 2S Sensor spacers (1.8 mm) | 0.00187 | 0.00064 |
| 2S Sensor spacers (4.0 mm) | 0.00027 | 0.00009 |
| 2S Service hybrids | 0.00806 | 0.00204 |
| Cooling | 0.00197 | 0.00029 |
| MPA and Bumps | 0.01212 | 0.00236 |
| Mechanics | 0.00370 | 0.00181 |
| PS FE hybrid circuits | 0.01862 | 0.00541 |
| PS FE hybrid spacers 1.6 mm | 0.00012 | 0.00005 |
| PS FE hybrid spacers 2.6 mm | 0.00112 | 0.00039 |
| PS FE hybrid spacers 4.0 mm | 0.00407 | 0.00139 |
| PS Inactive silicon | 0.00122 | 0.00025 |
| PS Power hybrid | 0.02045 | 0.00386 |
| PS Readout hybrid circuit | 0.00961 | 0.00274 |
| PS Readout hybrid spacer 1.6 mm | 0.00010 | 0.00003 |
| PS Readout hybrid spacer 2.6 mm | 0.00030 | 0.00010 |
| PS Readout hybrid spacer 4.0 mm | 0.00087 | 0.00030 |
| PS Sensor spacers (1.6 mm) | 0.00036 | 0.00013 |
| PS Sensor spacers (2.6 mm) | 0.00123 | 0.00043 |
| PS Sensor spacers (4.0 mm) | 0.00377 | 0.00130 |
| PS Support plate (below hybrids) | 0.00241 | 0.00117 |
| PS Support plate (below sensor) | 0.00223 | 0.00108 |
| Sensors | 0.02151 | 0.00433 |
| Services in Outer Tracking Volume | 0.03810 | 0.01153 |
| Support Mechanics | 0.01472 | 0.00719 |
| Supports in Outer Tracking Volume | 0.00990 | 0.00541 |
| Twisted pairs | 0.00018 | 0.00003 |