Transcript Muon Geometry

Muon PRS meeting
January 21st, 2003
Muon Barrel Geometry
Description
Norbert Neumeister
CERN EP / HEPHY Vienna
Introduction
• We are going to move to XML and DDD
– I had a look at the current geometry description
– the return yoke is already built, so cross-check with reality!
– barrel geometry is more complicated than endcap geometry
• New Geometry project:
– Geometry/Muon/
– MuonGeometry, MuonSensDet, SimulationData, ReconstructionData
• Simulation – Reconstruction geometry
–
–
–
–
–
active geometry (chambers)
passive geometry (return yoke, iron, coil)  needed for propagation
magnetic field geometry  NEW
for simulation we use active and passive geometry
for reconstruction we use only active geometry
(only for GEANE propagation the full geometry is used)
• Geometry description:
– muon.tz mb.tz, me.tz, xml files, engineering drawings (AutoCAD)
– describes: coil, return yoke, tail catcher, support structure, chambers
– structure is not very complicated
– XML files are readable (understandable)
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
2
Reality vs. Simulation
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
3
Details
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
4
Details
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
5
Structure
MUON/MB
MBXX MBXX MCXX MBXX
MBXX
central wheel
4 non-central wheels
cables on top of detector
this structure can not
(x = 1-24) cables G4 box (non sensitive) be used if the chimneys
MCXX
MBXX
MBXC
MBCA_x_MB
MCXX
RB1
RB11
RB2
RB22
RB3
RB33
M_Steel-008 G4Trap
M_Thick_Steel-008 G4Trap
M_Steel-008 G4Trap
M_Thick_Steel-008 G4Trap
M_Steel-008 G4Trap
M_Thick_Steel-008 G4Trap
MYBL_x_MCXX
MBAT
MBIC
MBBT
Norbert Neumeister
HEPHY Vienna
(x = 1-36) G4Box M_Steel-008
return yoke
are included!
tail catcher G4Box Copper
HB0 in front of first muon station G4Box M_B_Air
Muon PRS meeting, CERN,
21st January 2003
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Central Wheel
MCXX/RB3
simple trapezoids
MCXX/MBAT
simple boxes
MCXX/ MYBL_x_MCXX
simple boxes
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
7
Central Wheel
same material?
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
8
AutoCAD
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
9
Yoke – Basic Shapes
reality
same
material?
2
1
3
4
trapezoids
+
boxes
1
2
geometry
description
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
10
Central Wheel with Chambers
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
11
Chambers
Muon/MB/MCXX
Muon/MB/MBXX
MB1S
MB2S
MB3S
MB4S
MB5S
MB6S
MB7S
12 chambers of station 1
12 chambers of station 2
12 chambers of station 3
6 chambers of station 4
2 large chambers on top of station 4
2 small chambers at bottom of station 4
2 large chambers at bottom of station 4
…”chamber envelops”
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
12
Central Wheel with Chambers
MB5S
MB4S
MB3S
MB2S
MB1S
MB6S
MB7S
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
13
Central Wheel
MBCA_4_MB
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
14
Central Wheel
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
15
Details
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
16
Problems
position
of
chambers
should be a
trapezoid and
not a box!
non-magnetic
material!
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
17
AutoCAD
missing!
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
18
Problems
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
19
Chamber Structure
MB1S
MHB1
MHC1
MHAA_2_MHB2
MHAA_3_MHB2
MHAA_1_MHB2
MHAA_4_MHB2
MB1X
MB1Z
MB1R
MB1Y
MB1K
MB1L
RP1I
RP1O
Norbert Neumeister
HEPHY Vienna
honeycomb structure
electronics minicrates
electronics minicrates
electronics minicrates
electronics minicrates
outer 2 Z layers
inner 2 Z layers
outer 2 R layers
inner 2 R layers
?????
aluminum plates
inner RPC
outer RPC
Muon PRS meeting, CERN,
21st January 2003
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Chambers
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
21
DT Chambers
12 Layers per DT: 4 z, 8 (r,f)
wire pitch 4.2 cm
B~1T
honeycomb layer
Position for minicrate (front-end, trigger electronics)
30 cm
2-4 m
2 x 4 layers
„bending“ f Superlayer
Norbert Neumeister
HEPHY Vienna
4 layers
„non-bending“
q Superlayer
drift cell
Muon PRS meeting, CERN,
21st January 2003
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AutoCAD
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
23
Summary
•
XML files: malg.xml, mb.xml, me.xml
– for the time being just a copy of the tz-files
– chimneys are not included!
– at least we should check if there are any major problems
• Responsibilities
–
–
–
–
barrel ???
endcaps ???
coil, infrastructure ???
we need at least one contact person!
• Work to be done
–
–
–
–
check position of chambers
check materials and shapes
fix known problems: yoke geometry, (coil?)
create magnetic field geometry (Valery Andreev)
Norbert Neumeister
HEPHY Vienna
Muon PRS meeting, CERN,
21st January 2003
24