1. support structure ACDTopCoreThickness + 2 * ACDFaceThickness
Figure 1 Top ACD
tileThickness = 10 mm
ribbonGap 2.5 mm
sideOverlap 30 mm
topOverlap 15 mm
topTileXEdgeExtra_l
side tiles X
ribbonOverlap= 15 mm
connector
topTileSupportStandoff
topTileXEdge_l
topTileXEdge_l
topTileXMid_l
topTileXMid_l
topTileXCentral_l
Ribbon continues to the bottom of the 4th ACD side row
tileCentralThickness 12 mm
ribbonThickness = 4.5 mm
towersTotalX = mm
support structure ACDTopCoreThickness + 2 * ACDFaceThickness
ACDTKRStayClear 25.8 mm
Enclosing volume for side tiles
Figure 1 provides a view of the top tiles, displaying the overlap in this direction.
Also note that the edge top tiles are curved on the end – which is not necessary to simulate at this point. Rather we extend the last top tile to cover this area. Extend top tiles by a distance topTIleXEdgeExtra_l to reach edge of red box. Total length of simulated edge tiles is called topTileXTotal_l.
The boxes in yellow represent the ACD support structure.
The boxes in magenta are the connectors that hold the tiles to the support structure. At this time, it is not necessary to simulate these objects.
The blue boxes represent the ribbons which are underneath the ACD tiles – between the tiles and the support structure.
Note that all tiles are 10 mm, except for the middle row of top tiles – which are 12 mm thick.
3.) Do we know the location of the TKR edge relative to the top ACD tiles? Given the 1576 mm width of the base – I estimate that the TKR edge is 1576 – 2x( ) = 1568 mm (subtracting off 2 wall gaps and wall thickness). However, this estimate seems inaccurate, as the curved top tiles would not come close to the start of the side tiles – leaving a large gap.
TKR wall
side support ACDSideCorethickness + 2* ACDFaceThickness
PMTFiberGap 41.6 mm Z
Neiter vertical pieces of ribbon nor connectors will be simulated. See following slide for a more accurate picture of simulated elements and their relative positions. X
Enclosing volume for top face of ACD
Not to Scale
4 November 2002
ACD Simulated Geometry

2. ACD Simulated Geometry
Figure 1 details
tileThickness = 10 mm
ribbonGap 2.5 mm
topOverlap 15 mm
topTileXEdgeExtra_l
side tiles
ribbonOverlap= 15 mm
ribbonGap 2.5 mm X
topTileXEdge_l
topTileXEdge_l
topTileXMid_l
topTileXMid_l
topTileXCentral_l
Seg 1, face 0
Seg 5, face 0
Seg 0, face 1
Seg 2, face 0
Seg 4, face 0
Seg 3, face 0
ribbonGap 2.5 mm
TKRACDSupportGap = 45mm Needed to increase from old number of 10 mm to avoid overlap of ACD and grid.
Seg 0, face 3
Some constants:
topTileXCentral_l (primary) 334 mm
topTileXMid_l (primary) 338 mm
topTileXEdge_l (primary) mm
topTileXEdgeExtra_l (derived, computed so that tile almost extends to side tile; gap = ribbon thickness + ribbon Gap )
topTileXEdgeTotal_l (derived, sum of previous 2)
topTileSupportStandoff (primary) 25.4; distance from bottom edge of central tiles (col 2) and top of support
Not to Scale
Figure 1 provides a view of the top tiles, displaying the overlap in this direction.
Also note that the edge top tiles are curved on the end – which is not necessary to simulate at this point. Rather we extend the last top tile to cover this area. Extend top tiles by a distance topTIleXEdgeExtra_l to reach edge of red box. Total length of simulated edge tiles is called topTileXTotal_l.
The boxes in yellow represent the ACD support structure.
The boxes in magenta are the connectors that hold the tiles to the support structure. At this time, it is not necessary to simulate these objects.
The blue boxes represent the ribbons which are underneath the ACD tiles – between the tiles and the support structure.
Note that all tiles are 10 mm, except for the middle row of top tiles – which are 12 mm thick.
3.) Do we know the location of the TKR edge relative to the top ACD tiles? Given the 1576 mm width of the base – I estimate that the TKR edge is 1576 – 2x( ) = 1568 mm (subtracting off 2 wall gaps and wall thickness). However, this estimate seems inaccurate, as the curved top tiles would not come close to the start of the side tiles – leaving a large gap.
Vertical ribbon pieces are not simulated. Ribbons extend beyond corresponding tile’s edge by ribbonOverlap, except for edgemost ribbons, which go only as far as tile. Transvers gap between ribbon and adjacent tile is ribbonGap, same as vertical gap between tile and ribbon below.
Assume gap of 10 mm between top of towers and lower face of top support. Side support structures not shown. Z X
4 November 2002
ACD Simulated Geometry

3. ACD Simulated Geometry
Figure 2 Top Tiles
Not to Scale
Y-ribbon top segment is min. distance above top support..
ribbonGap +
ribbonThickness
ribbonGap = 2.5 mm
ACDSidesGap
334 mm
334 mm
318 mm
334 mm
334 mm
Face 0, fMeasure = Y, fRibbon = 1
Face 0, fMeasure = Y, fRibbon = 3
Face 0, fMeasure = X, fSegment = 1
Face 4, fMeasure = X, fSegment = 0
topTileGap = 3.5 mm
Face 2, fMeasure = X, fSegment = 0
towersTotalX = mm
Figure 2 The typical top tile has a width of 334 mm. We know that the distance between the inner edge of the side tiles is 1670 mm – (4 x 334) = 334 mm But then we must account for the gaps between the tiles and the gap between the edge of the top tiles and the side tiles – (4 x 3) – (2 x 2) = 318 mm
ACDSidesGap= max of
(tile y-dimensions) + 4*(topTileGap) + 2*ribbonGap + 2*(ribbonThickness) = 4* * *2.5+2*4.5 = 1684 mm. and
towersTotalX + 2*ACDTKRStayClear + 2*sideSupportThick + 2* PMTFiberGap = =
side support as in Fig.1 Z Y
ACDTKRStayClear mm
PMTFiberGap 41.6 mm
4 November 2002
ACD Simulated Geometry

4. Not to Scale Side Tiles Figure 3 X Z 331 mm 210 mm 160 mm 150 mm Row 0
sideHorizontalGap = 3 mm Z X
344 mm
334 mm
322 mm
334 mm
344 mm
331 mm
Row 0
sideVerticalGap = 0 mm
210 mm
Row 1
160 mm
Row 2
150 mm
Row 3
Leave side_vertical_gap == 0 mm until we can insert tilt in the side tiles.
Figure 3
ribbonWidth = 11 mm
Side tile height in row 0 artificially reduced to 331 since in simulation side tiles neither overlap nor slant.
X-dimension of middle column set to 322 mm to get total X-extent to be 1690.
4 November 2002
ACD Simulated Geometry

5. Side Tiles another view
Not to Scale Z X
Row 0
Height = 331 mm
Ribbon width 11 mm,
4.5 mm thick.
This is +x side so identifier has fFace=3, fMeasure=Y , fSegment=0
Row 1
Height = 210 mm
851.0 mm
ACD side support
Row 2
Height = 160 mm
Along the sides – it is probably easiest to model the scintillating tape in segments.
Row 3
Height = 150 mm
Figure 4
4 November 2002
ACD Simulated Geometry
tileThickness = 10 mm

6. ACD Simulated Geometry
Not to Scale
One more Top View
Face 4 (+y)
Side tiles
Face 1 (-x)
Face 3 (+x) Y
ribbons
Side length = ACDSidesGap + tileThickness – dovetailGap = 1690
The ribbons are underneath the tiles. X
Figure 5
ribbonGap + ribbonThickness = = 7 mm
Face 2 (-y)
dovetailGap = 4 mm
4 November 2002
ACD Simulated Geometry

7. Support pieces jigsaw puzzle, top viewy
Pieces || to X axis are longer
Top support covers sides x
Pieces || to Y axis are shorter
Not to Scale
Figure 6
4 November 2002
ACD Simulated Geometry

8. Support pieces jigsaw puzzle, side view
Top z
Short side || to y-axis y
Pieces || to Y axis are short
Not to Scale
Figure 7
4 November 2002
ACD Simulated Geometry

9. ACD Simulated Geometry
Identifiers
Tiles
FIELD NAME fLATObjects fACDFace fACDCmp fRow fCol
Symbolic Value eLATACD eACDTopFace, etc eACDTile
Numeric Value
Example: /1/0/40/2/ (top center tile)
Ribbons
FIELD NAME fLATObjects fACDFace fACDCmp fMeasure fRibbon fSegment
Symbolic Value eLATACD eACDTopFace, etc eACDRibbon eMeasureX,..Y
Numeric Value , Side faces: 0
Top face: 1-5
Example: /1/2/41/0/2/ (segment of third “x-measuring” ribbon which runs along the –y face)
Supports
FIELD NAME fLATObjects fACDFace fACDCmp
Symbolic Value eLATACD eACDTopFace, etc eACDSupport
Numeric Value
Example: /1/4/ (side support on +y side)
4 November 2002
ACD Simulated Geometry