MuonGeoModel status report focus on issues relevant to 13.0.10, 20

1
MuonGeoModelstatus report focus on issues
relevant to 13.0.10, 20

• Access to Condition DB
• with M. Verducci, R. Harrington
• MDT deformations
• with I. Logashenco
• Volume clashes

2
Alignment Constants as condition data

• An Alignment Tool and Service (already introduced
  at the last Muon Week) retrieve
• A-lines and B-lines from the cond DB (COOL with
  oracle), whenever appropriate, using the Interval
  Of Validity (IoV) Service, which takes adequate
  actions at any boundary of validity ranges in the
  ATLAS data
• alignment data are published in the detector
  store for generic applications (after un-packing)
• in MuonGeoModel the ? transforms of all stations
  with updated alignment parameters are overridden
• data preparation and reconstruction clients of
  MuonGeoModel access the most updated geometry
  representation available at each event

Tool/service integrated in 13.0.10 and
successfully accessing the production DB in
COOL2 to be integrated with the std GeoModel
scheme (? simulation by reading condition data)
3
Alignment Constants as condition data

• Testing the software chain reading A-lines from
  the Condition Database
• A-Lines corresponding to random misalignments in
  R_01_01_Egg_Rndm have been stored in the
  Condition DB
• Dump of the geometry (from MuonGeoModel) in 2
  scenarios
• Init from R static
• Init from R static A-lines from COOL
• Excellent agreement already reported at last
  Muon Week
• single muons with pT20GeV/c, in the relevant
  IoV, simulated in R_01_01_Egg_Rndm have been
  reconstructed in three modes

new

• black MuonGeoModel initialised with
  R_01_01_Egg_Rndm
• red R_01_01_Egg loaded init time (no
  correction for misalignments)
• blue R_01_01_Egg loaded init time A-lines read
  from the Condition Database

4

• black MuonGeoModel initialised with
  R_01_01_Egg_Rndm
• red R_01_01_Egg loaded init time (no
  correction for misalignments)
• blue R_01_01_Egg loaded init time A-lines read
  from the Condition Database

1/pT pull distribution
rms1.1 mm
z0 pull distribution
A comparison of positions of MDT hits associated
to tracks (red - black modes) shows deviations
consistent with random misalignments in
R_01_01_Egg_Rndm (1mm, 1mrad in each direction)
rms1.3 mm
rms1.3 mm
cot? pull distribution
rms1.1 mm
5

• DEFORMATION CONSTANTS
• MDT deformations are not simulated in Geant4
• Most effects can be described with rigid tubes
  tilted and shifted w.r.t. their nominal location
  in the multilayer
• Bent tubes and wire sagging are handled with
  other mechanisms and tools
• Deformations can be treated in Readout Geometry
• a first implementation in place in MuonGeoModel
  (under test) - needs test of coherence with Amdc
  
• full MDT tube transform comes from (first to
  last)
• nominal (translations only) tube_to_multilayer
• delta_deformation - add tilt and shift in the
  multilayer frame using B-line parameters
• nominal multilayer_to_station
• delta_station_alignment (A-lines)
• nominal station_to_global (P-lines)
• Realistic chamber geometry available to all
  reconstruction applications
• Deformations in digitization (ongoing and
  progressing work for testing the implementation
  of B-lines)
• simulate in the nominal geometry
• convert the hit local coordinates into nominal
  global coordinates i.e. compute a point
  belonging to the track
• convert the global position into local
  coordinates in the tilted and shifted tube
  (according to B-lines)
• use the new local coordinates to compute drift
  time

first plots available very low statistics
6
Clash clean-up active materials

• CSC small and large sectors spacer overshooting
  the station mother volume
• fixed envelop shape
• CSC large sectors station mother
• volume has no coffin shape clash
• with nearby stations
• use of assembly solves the problem

side consideration visualization of
Booleans coffin shape shown chambers, for gas
gaps not for G10honeycomb support panels
7
Clash clean-up active materials

• Small problems common to all EC MDT chambers

LB clashing with CRO and CHV similar to the
problem already solved in the barrel
solution
CRO and CHV longer than station envelop
overshooting shortened
MDT multilayer overshoots EC station envelop, due
to the longest tubes fixed
solved
8
Clash clean-up active materials

• Small problems common to all EC MDT chambers

In BMF stations LB02 clash with CRO, CHV and one
multilayer LB02 too high for the room between
the two multi-layers and the CRO1 and CHV1
height should it be LB01 in AMDB ? had hoc
solution
standard solution
does not work for EML1 and EML6 LB too long in
AMDB ? had hoc solution
some checks also needed on primary numbers
MuonGeoModel-00-04-11 to be collected for 13.0.20
should reduce substantially the number of clashes
recursive test submitted and running
9
Clash clean-up active-dead materials

• BOG and BOF clashing with the feet
• some BMS clashing with nearby coil ribs
• Probably some problem in the dead material
  description (detectors agree in MuonGeoModel and
  Amdc)

some refined code for dead matter from Andrei B.
available for testing
10
Clash clean-up active-dead materials
BMS with cutouts, not yet implemented, clashing
with coil ribs Ready to try the cutout tool from
GeoModel To simplify the implementation,
stations with cutouts are assemblies