New Hexagonal Design for MINERvA A. Bodek- Sept. 11. 2004

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New Hexagonal Design for MINERvAA. Bodek- Sept.
11. 2004
Now even counters have a 1.2 solid steel picture
frame Around the 3 m wide active target. The 30
cm lead is Attached to the steel frame and is on
both sides of the counter. The Fe Steel picture
frame is not instrumented except for one layer of
two triangular counters on the edge to see an
exiting muon. The light is routed with a 1.2
meter long extension of The green fiber taking it
to a connector outside the frame On the edge. A
clear fiber cable takes the light to a
phototube Odd counters have no steel or lead at
all, they are just 5.4 Meter wide totally active
scintillator. They go to a connector
just Outside. A clear fiber cable takes the
light to a phototube
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Even Xnumber PLANE
2-mm G10 or Al or stainless steel 0.25 mm to
protect Routing plate R1
1.2 m wide- Fe picture frame which is not
instrumented except for one layer of counters on
the outside.
plastic fiber routing plates.
Even Counters are all X counters have 3 m long
counters
Two 1.5 mm lead screwed to steel 1.2 meter outer
frame (one on each side of the counter
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Blue are active counters All X-even planes have
1.2 steel frame, Odd planes are U and V and are
totally active 5.4 meter long
V odd
X even
U odd
X
V odd
X-even
1.5 mm Pb on each side
even

2 mm plastic WLS fiber Routing plate to
connectors
Solid 1.2 Fe Fe frame Steel is black
15 mm
2 mm
One layer outside
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Blue are active counters All X-even planes have
1.2 steel frame, Odd planes are U and V and are
totally active 5.4 meter long
V odd
X even
U odd
X
V odd
1.5 mm Pb on each side
U odd
even

2 mm plastic WLS fiber Routing plate to
connectors
Solid 1.2 Fe Fe frame Steel is black
15 mm
2 mm
One layer outside