1G.Barber Tracker Update, Berkeley 10 Feb 2005

Tracker Progress

Contents:-

Station

Space Frame

Patch Panel / Vacuum Seal

Light Guide Map

Position of Degrader/Support

2G.Barber Tracker Update, Berkeley 10 Feb 2005

Station

The bare carbon fibre station machined and ready to accept the scintillating fibre planes.

3G.Barber Tracker Update, Berkeley 10 Feb 2005

Station ‘Connectorisation’

Each station has a total of 30 connectors, 10 per view. Each connector has 22 holes instead of the previous 18 but all of these are not used in every connector. All 3 planes are aligned and glued before the ‘connectorisation’ can begin. This is one of the main areas where a rigid QA system will need to be implemented. The photograph shows Roger Hare fitting connectors to the 4th prototype station at Imperial on Monday.

4G.Barber Tracker Update, Berkeley 10 Feb 2005

Space Frame

Components All of the components that make

the space frame assemblies have been or are in the process of being manufactured.

Tooling The jigs that align the space frames are all manufactured.

One further development?

5G.Barber Tracker Update, Berkeley 10 Feb 2005

Connector Map

126 Way

126 Way

128 Way

128 Way

125 Way

View ‘W’211 Channels

View ‘V’211 Channels

View ‘X’211 Channels

This is the connector map created for the KEK Test beam prototype. It will be updated for the final detector and will be a more uniform layout.

6G.Barber Tracker Update, Berkeley 10 Feb 2005

Connector 1

View ‘V’

18 Way

Bundles2 – 19

To Bulkhead Connector - 1

Station connectorViewed from thepolished face

2

6 4

8

5

7

3

91011

12

14 13151617

19 18xx

x x

7G.Barber Tracker Update, Berkeley 10 Feb 2005

Bulkhead Connector 1

View ‘V’

126 Way

Bundles2 – 127 in ‘V’

From ConnectorsC1 – C6

Station connectorViewed from thepolished face

2 64 85 73 9 10 11 12 13

x

14 1816 20 22 2415 1917 21 23 25

26 3028 32 34 3627 3129 33 35 37

39 4341 45 47 4938 4240 44 46 48

50 5452 56 59 61

63 6765 69 71 73

74 7876 80 83 85

87 9189 93 95 97

98 102100 104 107 109

111 115113 117 119 121

51 5553 57

62 6664 68

75 7977 81

99 103101 105

86 9088 92

110 114112 116

122 126124123 127125

70

94

118

58

82

106

72

96

120

60

84

108

x

8G.Barber Tracker Update, Berkeley 10 Feb 2005

Lead Diffuser

The lead diffuser will sit inside the bore of the cryostat at a position of Z = -6015 This is 238mm from the tracker plane. It will be supported on a spider that is fixed to the patch panel and can be put into position in ‘thin slices’. This gives 2 advantages:- it can be put into position in manageable pieces (weight) and the thickness/position can easily be changed.Extended guide studs also give more security during the installation.

9G.Barber Tracker Update, Berkeley 10 Feb 2005

Conclusions

There is still a great deal to design and detail and a few outstanding problems to solve but overall the design should be pretty much as for the prototype.

So once the prototype is completed in the next few weeks and assuming we find no major problems with the construction philosophy we can then concentrate on the final detailed design.