SciFi Tracker – SW Status & Plans Julia Sedgbeer for Ed McKigney Imperial College London General SW status Simulation & Reconstruction Performance Studies & Plans Test.
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Transcript SciFi Tracker – SW Status & Plans Julia Sedgbeer for Ed McKigney Imperial College London General SW status Simulation & Reconstruction Performance Studies & Plans Test.
SciFi Tracker – SW Status & Plans
Julia Sedgbeer for Ed McKigney
Imperial College London
General SW status
Simulation & Reconstruction
Performance Studies & Plans
Test Beam
Resources
Summary
…. Plans concentrate on now till October 2003
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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SciFi
Engineering representation – 5 stations
a) Ribbon doublet structure
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
b) u-v-t fibre plan
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Questions from Review Panel
Fibre tracker
It seems essential to perform a full simulation of a tracker
with five planes, including nominal inefficiency and assessment
of the redundancy by simulation of the loss of readout— dead
fibres. The impact of noise and misalignment should also be
assessed. What is the status of this simulation?
Because of the cost saving by multiplexing, it is important to
repeat the simulation in a realistically multiplexed
arrangement.
Will the main alignment be derived from “straight through”
muons?
Some documented information on the performance of the
fibre tracker in the MUSCAT experiment would be useful.
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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General SW Status
Simulation
feature
(Ed Mckigney)
status
5 stations
Electronic noise
Dead Channels
~ implemented
Multiplexing
Misalignment
Julia Sedgbeer
displacements
rotations
‘nominal’ SciFi ‘ideal’ SciFi
simulation
simulation
0 (> 2 p.e.)
0
0.25%
0
71
none
0
0
Mice Collaboration Meeting, June 2003
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General SW Status
Electronic Noise
Cross talk
Experience at DØ – no cross talk – verified by HW tests
Dead channels
Experience of VLPC’s at DØ – no noise above 2 p.e.
Experience at DØ – 77,000 channels
200 compromised fibre channels – 0.25%
190 compromised VLPC channels – 0.25%
Alignment
Experience at DØ – 835 μm fibres
Precision of fibre mounting ~35-40 μm
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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DØ fibre tracker - VLPC performance
(A.Bross)
VLPC (Visible Light Photon Counter) –
Cryogenic APD @ 9K
VLPC HISTE VI
–High QE 80%
–Low noise <5X104 Hz (@1.0 pe)
–High Rate capability
>40 MHz
–High production yield
70%
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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General SW Status
Reconstruction
space point algorithm – require hits in 3 views of 1 station
(triplet)
track finder requires 4/5 or 5/5 triplet points
track fit includes energy loss
tracking efficiency & purity already v. good
(Ed Mckigney, Oct 2002, Berkeley)
Grid
Job submission to Grid exists (IC - EDG) – being automated
(web interface – K.Georgiou)
RF background simulation
So far used uniform distribution parallel to axis – vary rates
Improved model being implemented (Yagmur Torun)
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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Performance studies & plans
Done
Lower priorty
(Ed Mckigney)
Important
study
‘ideal’ SciFi
‘nominal’ SciFi –
(MUX & dead chn)
except study params
RF bkg
MUX
Dead Channels
Misalignment
RF & dead chn.
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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RF bkg studies - pt resolution
Distributions
from the
Berkeley
meeting
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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MUX studies - pt resolution
MUX 7 1
reduces
pt resolution
by ~2
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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Performance studies & plans
Reconstruction plans – low priority
Space points
allow points made from hits in 2 out of 3 views in a station
(doublets)
Track finder
allow limited number of double points per track
Grid plans – priority? – need input from collab.
Extend grid access to MICE collaboration
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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Test Beam
Plan ..
Single station prototype
Cosmic ray test FNAL – September 2003
Determine:
Light yield at VLPC – sufficient to allow noise rejection?
Cross talk – small?
(Also demonstrate multiplexing and precision of fabrication)
…. compare results with simulation
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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Resources
Computing
Some access to Grid farms in IC/HEP and LeSC
Adequate for studies to be done this summer
Manpower
Ed Mckigney replacement:
– shortlist
- expect appointment in July
- test beam commitment
SW: A.Tapper (IC), A.Khan (Edinburgh), J.Sedgbeer (IC),
P.Kyberd (Brunel), grad student from Oct. (IC).
Grid: K.Georgiou (IC), D.Colling(IC)
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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Summary
SW simulation & reconstruction
Computing resources
adequate resources available
Manpower resources
most of the functionality required is in place
losing Ed – will be replaced
… but test beam commitment
plus some extra manpower for SW & Grid
Aim to complete required SW studies by October
Julia Sedgbeer
Mice Collaboration Meeting, June 2003
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