Muon PRS meeting January 21 st , 2003

Muon PRS meetingJanuary 21st, 2003

Norbert NeumeisterCERN EP / HEPHY Vienna

Muon Barrel GeometryDescription

Norbert NeumeisterHEPHY Vienna

2 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

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 NeumeisterHEPHY Vienna

3 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Reality vs. Simulation

Norbert NeumeisterHEPHY Vienna

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Details

Norbert NeumeisterHEPHY Vienna

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Details

Norbert NeumeisterHEPHY Vienna

6 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

MUON/MB

MCXX central wheel MBXX 4 non-central wheels MBXC cables on top of detector MBCA_x_MB (x = 1-24) cables G4 box (non sensitive)

MCXX RB1 M_Steel-008 G4Trap RB11 M_Thick_Steel-008 G4Trap RB2 M_Steel-008 G4Trap RB22 M_Thick_Steel-008 G4Trap RB3 M_Steel-008 G4Trap RB33 M_Thick_Steel-008 G4Trap

MYBL_x_MCXX (x = 1-36) G4Box M_Steel-008

MBAT tail catcher G4Box Copper MBIC MBBT HB0 in front of first muon station G4Box M_B_Air

Structure

retu

rn y

oke

MCXX MBXX MBXXMBXXMBXX

this structure can not be used if the chimneys

are included!

Norbert NeumeisterHEPHY Vienna

7 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Central Wheel

MCXX/RB3simple trapezoids

MCXX/ MYBL_x_MCXXsimple boxes

MCXX/MBATsimple boxes

Norbert NeumeisterHEPHY Vienna

8 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Central Wheel

same material?

Norbert NeumeisterHEPHY Vienna

9 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

AutoCAD

Norbert NeumeisterHEPHY Vienna

10 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Yoke – Basic Shapes

same material?

reality

geometry description

4

3

2

1

1

2

trapezoids+

boxes

Norbert NeumeisterHEPHY Vienna

11 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Central Wheel with Chambers

Norbert NeumeisterHEPHY Vienna

12 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Chambers

Muon/MB/MCXXMuon/MB/MBXX

MB1S 12 chambers of station 1 MB2S 12 chambers of station 2 MB3S 12 chambers of station 3 MB4S 6 chambers of station 4 MB5S 2 large chambers on top of station 4 MB6S 2 small chambers at bottom of station 4 MB7S 2 large chambers at bottom of station 4

…”chamber envelops”

Norbert NeumeisterHEPHY Vienna

13 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Central Wheel with Chambers

MB7SMB6S

MB5S

MB3S

MB1S

MB2S

MB4S

Norbert NeumeisterHEPHY Vienna

14 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

MBCA_4_MB

Central Wheel

Norbert NeumeisterHEPHY Vienna

15 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Central Wheel

Norbert NeumeisterHEPHY Vienna

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Details

Norbert NeumeisterHEPHY Vienna

17 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Problems

should be a trapezoid and

not a box!

position of

chambers

non-magnetic material!

Norbert NeumeisterHEPHY Vienna

18 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

AutoCAD

missing!

Norbert NeumeisterHEPHY Vienna

19 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Problems

Norbert NeumeisterHEPHY Vienna

20 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Chamber Structure

MB1SMHB1 MHC1 honeycomb structureMHAA_2_MHB2 electronics minicrates

MHAA_3_MHB2 electronics minicrates MHAA_1_MHB2 electronics minicrates MHAA_4_MHB2 electronics minicrates

MB1X outer 2 Z layers MB1Z inner 2 Z layers MB1R outer 2 R layers MB1Y inner 2 R layers MB1K ????? MB1L aluminum plates RP1I inner RPC RP1O outer RPC

Norbert NeumeisterHEPHY Vienna

21 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

Chambers

Norbert NeumeisterHEPHY Vienna

22 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

drift cell

2-4 m

30 c

m

2 x 4 layers„bending“ Superlayer

4 layers„non-bending“ Superlayer

honeycomb layerPosition for minicrate (front-end, trigger electronics)B ~ 1 T

12 Layers per DT: 4 z, 8 (r,)

wire pitch 4.2 cm

DT Chambers

Norbert NeumeisterHEPHY Vienna

23 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

AutoCAD

Norbert NeumeisterHEPHY Vienna

24 Muon PRS meeting, CERN, Muon PRS meeting, CERN, 21st January 200321st January 2003

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)