Muon Spectrometer Nomenclature
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Transcript of Muon Spectrometer Nomenclature
Muon Spectrometer Nomenclature
• Kevin Black/Vivek Jain/Stephane Willocq went through various documents and produced what we think are the correct names for the various detectors in the MuonSpectrometer– mTDR (Chapter 4 in particular)– ATL-COM-MUON-2002-019, Assamagan et al.
• Please let us know if you spot any errors
• This file was last updated on May 22, 2006
Muon Spectrometer
Trigger system: RPC and TGCPrecision meas: MDT and CsC
Detector feetBarrel toroid Endcap toroid
+X points toward the center of the ring
Sector 13 is currently being used to study cosmics
Rails
General naming scheme• The station identifier is a prefix to all subsystems - MDT, RPC, CSC and TGC:
Detector.StationName.StationEta.StationPhi– Detector = 7 for the MuSpec– StationName specifies the location of the sub-system
• See next page for a listing– StationEta increases with Z in the barrel and with R in the Endcap– StationPhi increases with Phi
• An example of this prefix is 7.44.1.33– 44 means TGC at the middle station in the Endcap– 1 is the eta index – closest to the beam– 33 is the phi index
• The prefix is followed by other numbers and they describe in more detail the technology, layer number, tube number, etc. See ATL-COM-MUON-2002-019, K.Assamagan, et. al.
These are the StationNames as text and a number – taken from MuonIdHelper class as well as ATL-COM-MUON-2002-19Obsolete names have been removedStationName
StationNo.
StationName
StationNo.
StationName
StationNo.
BIL 00 BOG 10 T2F 43
BIS 01 BOH 11 T2E 44
BML 02 EIL 13 T3F 45
BMS 03 EEL 14 T3E 46
BOL 04 EES 15 T4F 47
BOS 05 EML 17 T4E 48
BEE 06 EMS 18 EIS 49
BIR 07 EOL 20 CSS 50
BMF 08 EOS 21 CSL 51
BOF 09 T1F 41 BIM 52
T1E 42
Annotated pictures are toward the end of file
Explanation of names for MDT and RPC
• Station Numbers 00:05– BIL: Barrel Inner (station) Long/Large Chamber (between toroid coils)– BIS: Barrel Inner (station) Small Chamber (around the toroid coils)– Similarly for BML/S and BOL/S, where M is Middle station and O is
Outer station • 06 BEE is a barrel extension mounted on the Endcap
– In 3-D figure on Pg. 3 , BEE fits into the cutouts in the Endcap toroid• 52 BIM should have been BIL but for the rails in sectors 11,15• 07 BIR is Barrel Inner Rib (or Rails) and are below the rails
and cover the gaps left by the BIM chambers• 08:09 BMF/BOF are around the feet of the detector
– middle and outer layers• 10:11 BOG/BOH are on either side of the feet (outer)
– BOH don’t seem to exist anymore!!
MDT and RPC names (contd.)
• 13/49 EIL/EIS Endcap Inner station Long/Short• 14:15 EEL/EES. Endcap extensions and are next to barrel
toroids• 17:21 EML/EMS/EOL/EOS. Endcap Middle/Outer station
Long/Short
• 41:48 TGC in the Endcap (see annotated figure for details)• 49:50 CSS/CSL. CSC Short and Long Phi sectors
TGC and CSC names
from mTDR, page 68. RPC chambers are the thin hatched rectangles,in both the large/small sectors
BOS
X
Toroid Coils
Small MDT chambers
Large MDT chambers
BMS
BIS
BOL
BIL
BML
Voussoir
Strut
RPC chambers
from mTDR, page 72
BIRBIM
BMF
BOG
BOH*
Feet
* It seems that the BOH detectors do not exist!!
Railsx
Page 73 of mTDR – Chambers in the Feet Region (Sectors 12 and 14)
BOF (these are between the feet and do exist!)Detectors inside the feet are called BOG and not BOF (as labeled here)
I.P.
CSC
Page 69 of mTDR – Large MDT’s in the EndcapSmall MDT’s follow a similar pattern
EOL EML
EIL
EEL
CSC
F detectors, e.g., FOL are obsolete. Everything is now labeled E, e.g., EOL
T4E
T4FT1F
T1E1
T1E2
T1E3
T1E4
T2F / T3F
T2E5 / T3E5
T2E4 / T3E4
T2E3 / T3E3
T2E2 / T3E2
T2E1 / T3E1
VariousTGC detectors
Z (mm)
R (mm)
The numberafter E is the indexand is shownfor explanatorypurposes
The gray boxesare EndcapMDT’s
S,L correspond to MDT
EEL/EES*
*Position of EEL/EESis approximate
1
1
CSLCSS
~2
CSC
~2.7
From mTDR Page 91: In reality, there is one CSS/CSL chamber with four gas gaps each (and not two chambers as shown in the picture)