Transcript Tracker Update Contents:Components Station Layout Light Guide Map QA Patch Panel Alignment of Tracker Installation Procedure 3D Virtual Model Conclusions G.Barber Mice Tracker Mechanical Progress Imperial 2006

Tracker Update
Contents:Components
Station Layout
Light Guide Map
QA
Patch Panel
Alignment of Tracker
Installation Procedure
3D Virtual Model
Conclusions
G.Barber Mice Tracker Mechanical Progress Imperial 2006
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Stations
Modifications to the Carbon Fibre
The New station has had its outer
diameter reduced to 396 to take into
account the fact that the bore of the
solenoid is not machined but a rolled tube.
The connector flange has been thickened
to 3mm to allow machining. This is to
ensure that there is a uniform thickness
thus ensuring that the completed
tracker is ‘of one axis’ and all planes are
parallel. Also the face that seats the
connectors has a completely machined face
to allow all of the connectors to sit down
flat thus keeping the axis of the fibres
perpendicular to the plane
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Station 4 Fabrication (Finished)
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Space Frame
Modifications
The components that are used
to construct the space frame
are similar to before with the
exception of the locating foot
and the diameter change. The
foot was changed because of
problems during assembly, if the
dowel location was pushed into
the foot there was no way to
extricate it. The new foot has 2
smaller dowels either side of
the structural tube.
Old Foot Design
Gluing Fillet Design
New Foot Design
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Space Frame
Tooling
The jigs that align the space frames
will need to be modified/re-made
To accommodate the new foot
design and also to match the new
station to station pitch.
This has been identified
as a work package that
can be given out to
contract people and will
be investigated
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Station Layout/Pitch
The final pitch has still to be
decided but the two
alternatives shown are
Top:15cm, 23cm, 25cm and 47cm
Bottom:15cm, 25cm, 23cm and 47cm
If this is the case the only
need for a decision is to
accommodate the length of
wave guide and I’m sure we
can accommodate a 2cm
change in the lengths by
making them the longest
required.
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Light Guide Map
20
22
22
555
To
576
20
493
To
512
22
471
To
492
22
22
C2
43
To
64
22
65
To
86
C3
22
C4
22
87
To
108
C5
C26
C6
C25
View ‘V’
View ‘W’
214 Channels 214 Channels
C24
View ‘X’
212 Channels
C21
427
To
448
405
To
426
22
C10
C11
C19
Bulkhead
Connector 3
C18
365
To
384
20
C17
343
To
364
22
C16
321
To
342
22
C15
299
To
320
C12
171
To
192
C14
277
To
298
20
22
22
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This is the final version, assuming
no one finds any glaring mistakes,
of the connector map for the tracker
it can be found in its full form at
http://www.hep.ph.ic.ac.uk/CAD/mice/finalmice
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20
257
To
276
193
To
214
22
215
To
236
237
To
256
C13
20
149
To
170
C9
C20
385
To
404
20
129
To
148
C8
C22
20
109
To
128
C7
C23
449
To
470
22
C30 C1
View of the station onto the
polished face of the connector
22
21
To
42
C27
533
To
554
513
To
532
C29
1
To
20
C28
22
20
599
To
620
577
To
598
22
20
621
To
640
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Connector 1
View ‘W’
20 Way
Bundles
1 – 20
1
To Bulkhead
Connectors
1, 6, 11, 16 & 21
Station connector
Viewed from the
polished face.
Internal light guide
connector viewed
from rear or fibre
entry side.
G.Barber Mice Tracker Mechanical Progress Imperial 2006
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4
10
9
16
15
2
3
8
7
6
14
13
12
11
19
20
x
18
17
x
8
Internal Lightguides Station 1
C1
1 to 20
C2
21 to 42
C3
43 to 64
Bulkhead 1
C4
65 to 86
1 to 128
C5
87 to 108
C6 109 to 128
Length = XXXmm
C7 129 to 148
C8 149 to 170
C9 171 to 192
Bulkhead 2
C10 193 to 214
129 to 256
C11 215 to 236
C12 237 to 256
Length = XXXmm
C13 257 to 276
C14 277 to 298
C15 299 to 320
Bulkhead 3
C16 321 to 342
257 to 384
C17 343 to 364
C18 365 to 384
G.Barber Mice Tracker Mechanical Progress Imperial 2006
Length = XXXmm
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External Lightguides
• These are one to one
connections between the
external tracker bulkhead
connector and the VLPC 128
way connectors.
Bulkhead
connector
G.Barber Mice Tracker Mechanical Progress Imperial 2006
VLPC
connector
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QA
Due to the problem that has been
highlighted by the connectors, more
thought is required for the QA. One
of the things we will be doing is to
manufacture a ‘GO gauge’. This
would be a block of very accurately
positioned pins that match the hole
pattern on the connector. If the
connector and the block fit together
then the holes in the connector are
acceptable, if not it is discarded.
Such a gauge could be given to the
manufacturer so as to ensure
consistent quality.
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Assembly Comb
This is being manufactured in
Liverpool from aluminium and
will be tried with the existing
fibre ribbon (at Brunel).
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Patch Panel Hole Requirements
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Positioning In The Solenoid
The tracker sits on 4 adjustable
feet two at the front two at the
rear and is held down by a spring
loaded foot at the 12 o’clock
position. This aligns the axis
of both tracker and solenoid
The tracker is aligned in Z
and Phi by pulling a locating
block into a Vee which is
located using dowels to
the patch panel.
G.Barber Mice Tracker Mechanical Progress Imperial 2006
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The Diffuser In The Solenoid
The new device to hold and
change the lead diffuser
in the solenoid will be partially
mounted onto the cover of the
patch panel. The cover will need
to be stiffened and tied back
to the ‘solid’ region where the
patch panel is mounted to
the solenoid. We have allowed
a bore of 331Ø in the cover
with a series of holes and
a position for an O-ring.
The final details to be worked
out with Wing & Stephanie
G.Barber Mice Tracker Mechanical Progress Imperial 2006
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Installation ‘Cartoon’
The following sequence is a first attempt to show the
stages of installation of the tracker into the solenoid.
They are not definitive and are aimed to provoke a
debate/discussion. I hope that the installation will
then evolve with all interested parties contributing.
It should be noted that all of this work will need to
take place in a ‘light controlled’ environment (NO UV).
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Stage 1 of Installation
The patch panel is
fitted and sealed to the
solenoid. Hopefully at
this stage we can test
the seals using cover
plates.
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Stage 2 of Installation
A target module is fitted
into the bore of the
solenoid and the feet
adjusted to set the cross
hairs on the same axis as
the solenoid bore. Then
the Phi/Z retaining
bracket is fitted and the
whole assembly surveyed it
is carefully removed to the
CMM for measurement.
(As Mike pointed out, this
makes a good ‘Go Gauge).
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Stage 3 of Installation
The target module is
mounted onto the CMM
(Computerised
Measuring Machine), in a
jig that simulates the
bore of the solenoid. It
is then surveyed.
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Stage 4 of Installation
The tracker module is
then mounted into the
same jig on the CMM.
Using the survey from
the target module we
can adjust the 4 support
feet until the tracker
shares the same axis as
the target module.
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Stage 5 of Installation
The tracker, complete with the light guide support
structure is lifted onto the installation cradle. The
light guide support structure is to ensure that no
damaging forces are exerted on the fibres. Covers will
be fitted during transit.
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Stage 6 of Installation
The tracker is then slide
into its pre-determined
position inside the bore of
the solenoid. This position
will already have been
determined using the
‘tracker target’ in stage 2.
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Recap of Positioning In The Solenoid
The tracker sits on 4 adjustable
feet two at the front two at the
rear and is held down by a spring
loaded foot at the 12 o’clock
position. This aligns the axis
of both tracker and solenoid
The tracker is aligned in Z
and Phi by pulling a locating
block into a Vee which is
located using dowels to
the patch panel.
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Stage 7 of Installation
With the tracker in
position and secure the
light guides can now be
carefully re-routed to
their final position in
the patch panel and the
seals fitted. If the
external light guides are
not to be attached
immediately then light
tight/protection covers
will remain fitted.
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Stage 8 of Installation
The light guides can
then be secured to stop
any damage and a shield
(not shown) fitted to
stop any damage
occurring when the
diffuser is installed.
The Light guide support
structure is now
removed.
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Stage 9 of Installation
The patch panel cover is
fitted and sealed to the
patch panel. If we are
not ready to fit the
diffuser mechanism
then a cover plate will
be attached. We can
repeat the gas seal test
at this point.
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Requirements (those thought of at least)
To carry out the work we will need at least 2M of
clear working area in front of the solenoid. We hope
that this is achievable either by removing equipment
in front of the solenoid or as is more likely, by moving
the solenoid sideways out of the beamline. The
solenoid and its kit would sit on a plinth and it would
move as one. As already stated we will need this area
to be light controlled, this will probably be achieved
by building a tent structure over the area.
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Overall Layout (Land Grab)
Because of the amount of equipment required to fit
into the area and possible conflicts that this may
cause it has been decided to ‘build’ a 3D virtual model
of the region. Also we need to be sure that all of our
fibres can be accommodated in the fibre length
allowed so this model will be the first step in this
process. We plan to eventually build a full size model
of this region to convince ourselves that what we
have designed is feasible. The patch panel, fibre run,
trellis and VLPC unit have been modelled and the idea
is (we hope) to ask Stephanie to ‘assemble’ all of the
3D modelled items into a master model based on
Tony’s floor layout.
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Layout 1st Attempt
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Layout 2nd Attempt
This was an attempt to
achieve a shorter fibre run.
In actual fact it increased
the longest run from
1884mm to over 2200mm
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Conclusions
• We have the design completed but for a few details
and require a final set of engineering drawings.
• There is more work to be carried out on the layout
and we hope to build a physical model to help.
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