|
>
> | Sergey Burdin's "Concentric Diskettes" Endcap Layout
A couple of talks showing the basic idea: 2013-06-26_Burdin_Rings.pdf
and a later update with a more sophisticated layout: 2013-08-27_Jones_Lpool_Status.pdf.
Caculation of diskette sizes (J.Pater) using spreadsheet found below:
Using the same module dimensions given above, assuming the same active coverage as the quad-hex-hex LoI -layout disks:
| Physical outer radius of ring 2 modules: centres not corners - corners will extend further | 315.2 | | | Active outer radius of ring 2 modules: centres not corners | 315.0 | same as LoI | | Active inner radius of ring 2 modules: centres not corners | 274.6 | | | Physical inner radius of ring 2 modules: centres not corners | 274.4 | | | | | | | Physical outer radius of ring 1 modules: centres not corners - corners will extend further | 253.0 | | | Active outer radius of ring 1 modules: centres not corners | 252.7 | | | active CENTRE of ring 2 modules | 232.5 | | | Active inner radius of ring 1 modules: centres not corners | 212.3 | | | Physical inner radius of ring 1 modules: centres not corners | 212.1 | | | | | | | Physical outer radius of ring 0 modules: centres not corners - corners will extend further | 190.7 | | | Active outer radius of ring 0 modules: centres not corners | 190.5 | | | Active inner radius of ring 0 modules: centres not corners | 150.1 | same as LoI | | Physical inner radius of ring 0 modules: centres not corners | 149.9 | | | | | | | | | | | Number of modules per ring, rounded up to be divisible by 4 (front/back, left/right clamshell): | | |
| Ring 2: |
60 |
|
| Ring 1: |
48 |
|
| Ring 0: |
36 |
|
Jo's spreadsheet for calculating numbers of rings: PixelDiskDimensions.xlsx
BELOW HERE IS OLDER INFORMATION - may no longer be relevant |
| | Pixel Endcaps in the LoI (Cartigny) Layout
The drawings below show 3 possible types of pixel endcap disks in the LoI, or "Cartigny" layout of the upgraded inner tracker. The original Cartigny layout called for six disks, at the z positions shown in the table below, with outer active radius of 315mm and inner active radii of 135mm (disks 1-4), 175mm (disk5) and 215mm (disk 6). These specifications can not be met exactly with the current module designs and assuming the simplest possible disk layout (shown below), where all modules are fixed directly to the front and back surfaces of a flat disk. |
|
<
< |    |
>
> |    |
| |
The closest match to the requested dimensions are illustrated in the drawings above. These disks use 'quad' modules (modules built on 4 FEI4 chips in a 2x2 grid placement) and 'hex' modules (built on 6 chips in a 2x3 grid). Disks 1-4 would have the 'QHH' geometry shown in the leftmost picture ('QHH' for Quad-Hex-Hex as the innermost ring is made of quad modules and the middle and outer rings are made of hex modules). Disk 5 is QQH and Disk 6 is QH. This results in the dimensions shown in the table below: |
|
<
< | | z (mm) | Rinner (active) (mm) | Router (active) (mm) | | 822 | 150.1 | 315.0 | | 960 | 150.1 | 315.0 | | 1140 | 150.1 | 315.0 | | 1360 | 150.1 | 315.0 | | 1600 | 170.6 | 315.0 | | 1890 | 212.4 | 315.0 | |
| | |
|
<
< | Dimensions assumed: |
>
> | | z (mm) | Rinner (active) (mm) | Router (active) (mm) | | 822 | 150.1 | 315.0 | | 960 | 150.1 | 315.0 | | 1140 | 150.1 | 315.0 | | 1360 | 150.1 | 315.0 | | 1600 | 170.6 | 315.0 | | 1890 | 212.4 | 315.0 | Dimensions assumed: |
| |
- 0.45mm gap between adjacent FEI4s in a module
- sensor dead edge 0.2mm radially
- a hex module is 61.3mm long radially
|
| | LoI backup document
The pixel disk backup document for the Phase-II Letter of Intent can be found here: http://cds.cern.ch/record/1515010/files/ATL-UPGRADE-PUB-2013-004.pdf |
|
<
< | Sergey Burdin's "Concentric Diskettes" Endcap Layout
A couple of talks showing the basic idea: 2013-06-26_Burdin_Rings.pdf
and a later update with a more sophisticated layout: 2013-08-27_Jones_Lpool_Status.pdf.
Caculation of diskette sizes (J.Pater) using spreadsheet found below:
Using the same module dimensions given above, assuming the same active coverage as the quad-hex-hex LoI-layout disks:
| Physical outer radius of ring 2 modules: centres not corners - corners will extend further | 315.2 |
| | Active outer radius of ring 2 modules: centres not corners | 315.0 | same as LoI | | Active inner radius of ring 2 modules: centres not corners | 274.6 |
| | Physical inner radius of ring 2 modules: centres not corners | 274.4 |
|
|
|
| | Physical outer radius of ring 1 modules: centres not corners - corners will extend further | 253.0 |
| | Active outer radius of ring 1 modules: centres not corners | 252.7 |
| | active CENTRE of ring 2 modules | 232.5 |
| | Active inner radius of ring 1 modules: centres not corners | 212.3 |
| | Physical inner radius of ring 1 modules: centres not corners | 212.1 |
|
|
|
| | Physical outer radius of ring 0 modules: centres not corners - corners will extend further | 190.7 |
| | Active outer radius of ring 0 modules: centres not corners | 190.5 |
| | Active inner radius of ring 0 modules: centres not corners | 150.1 | same as LoI
| | Physical inner radius of ring 0 modules: centres not corners | 149.9 |
|
|
|
|
|
|
| Number of modules per ring, rounded up to be divisible by 4 (front/back, left/right clamshell):
|
|
|
| Ring 2: |
60 |
|
| Ring 1: |
48 |
|
| Ring 0: |
36 |
|
|
|
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Jo's spreadsheet for calculating numbers of rings
PixelDiskDimensions.xlsx |
>
> | |
| |
| META FILEATTACHMENT |
attachment="25_01_13_Flex-tapes_for_the_ATLAS_pixel_Half_Disk_01-21.pdf" attr="" comment="Yiorgos' slides on disk bus tape design: pages 1-21" date="1360332434" name="25_01_13_Flex-tapes_for_the_ATLAS_pixel_Half_Disk_01-21.pdf" path="25_01_13 Flex-tapes for the ATLAS pixel Half Disk_01-21.pdf" size="10153992" stream="25_01_13 Flex-tapes for the ATLAS pixel Half Disk_01-21.pdf" tmpFilename="/usr/tmp/CGItemp8387" user="JoleenPater" version="1" |
| META FILEATTACHMENT |
attachment="25_01_13_Flex-tapes_for_the_ATLAS_pixel_Half_Disk_22-end.pdf" attr="" comment="Yiorgos' slides on disk bus tape design: pages 22 to end" date="1360332535" name="25_01_13_Flex-tapes_for_the_ATLAS_pixel_Half_Disk_22-end.pdf" path="25_01_13 Flex-tapes for the ATLAS pixel Half Disk_22-end.pdf" size="11543912" stream="25_01_13 Flex-tapes for the ATLAS pixel Half Disk_22-end.pdf" tmpFilename="/usr/tmp/CGItemp8390" user="JoleenPater" version="1" |
|
Copyright © 2008-2025 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.