f1 contribution to ilc vertex detector tobias haas 23 febuary 2005
TRANSCRIPT
F1 Contribution to ILC Vertex Detector
Tobias Haas
23 Febuary 2005
Tobias Haas: Physics at a Future Linear ColliderTobias Haas: Physics at a Future Linear Collider
Linear Collider BasicsLinear Collider Basics LEP gave LEP gave ~ 1 fb~ 1 fb-1 -1 /expt. in 11 years, /expt. in 11 years,
with 10with 1077 Z Z00 LEP1 LEP1 At √s = 500 GeV one needs 500 fbAt √s = 500 GeV one needs 500 fb-1 -1 to to
get:get: ~ 30,000 Zh~ 30,000 Zh120120
~ 50,000 h~ 50,000 h120120 νν 101066 W W++ W W--
At √s = 1000 GeV one needs 1000 fbAt √s = 1000 GeV one needs 1000 fb-1 -1
to get:to get: ~ 6,000 HA (300GeV)~ 6,000 HA (300GeV) ~ 3,000 h~ 3,000 h500500 νν ~ 2,000 WW~ 2,000 WWνν (if no Higgs)
Need lots of luminosity to scan multiple Need lots of luminosity to scan multiple thresholds, vary polarisation, go to thresholds, vary polarisation, go to γγγγ, , ee--γγ, e, e--ee--
Xee
Tobias Haas: Physics at a Future Linear ColliderTobias Haas: Physics at a Future Linear Collider
Detector Detector ConsiderationsConsiderations Vertexing:Vertexing:
Flavour tagging with Flavour tagging with high purity and high purity and efficiencyefficiency
Tracking:Tracking: Momentum resolution to Momentum resolution to
measure recoil massesmeasure recoil masses Calorimetry:Calorimetry:
Good segmentation and Good segmentation and excellent EM energy excellent EM energy resolutionresolution
Tobias Haas: Physics at a Future Linear ColliderTobias Haas: Physics at a Future Linear Collider
VXD for Heavy Flavour VXD for Heavy Flavour IdentificationIdentification
Flavour couplings of Higgs are Flavour couplings of Higgs are basic to test SUSY scenarios: basic to test SUSY scenarios: Many have different +2/3 vs. -Many have different +2/3 vs. -1/3 couplings. b vs. c best 1/3 couplings. b vs. c best hope.hope.
5 layers with 800 Mio pixels. 5 layers with 800 Mio pixels. Innermost layer at 1.5 cmInnermost layer at 1.5 cm
0.03% X0.03% X00/layer/layer
Visions of a VXD
• 5 Layers
• 20 x 20 m2 pixels
• Sensor thickness < 60 m
• 799 Mpixels
• Readout time 50 s
This is a major R&D projectThis is a major R&D project
Topics of VXD R&D
• Sensor technology ← DESY– Efficiency, S/N, cost, ease of use, speed, radiation
tolerance, environmental constraints
• DAQ
• Thinning ← DESY
• Support, Cooling ← DESY
• Detector design and integration ← DESY
DESY/F1 activities started already in 2001
Tobias Haas: Physics at a Future Linear ColliderTobias Haas: Physics at a Future Linear Collider
Some Example Some Example ActivitiesActivities
Topic 1:Topic 1:Best possible VXD vs. What do we need to do Best possible VXD vs. What do we need to do
the physics?the physics?Topic 2:Topic 2:
Develop a sensor technology that does the Develop a sensor technology that does the job.job.
Topic 3:Topic 3:How do we put sensors together to make a How do we put sensors together to make a
real detector? real detector?
Tobias Haas: Physics at a Future Linear ColliderTobias Haas: Physics at a Future Linear Collider
Some Example Some Example ActivitiesActivities
Topic 1:Topic 1:Best possible VXD vs. What do we need to do Best possible VXD vs. What do we need to do
the physics?the physics?Topic 2:Topic 2:
Develop a sensor technology that does the Develop a sensor technology that does the job.job.
Topic 3:Topic 3:How do we put sensors together to make a How do we put sensors together to make a
real detector? real detector?
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
IntroductionIntroduction
Goal:Goal: Optimization of design Optimization of design
parameters for VXD:parameters for VXD: Support, sensor Support, sensor
thickness, overlaps, thickness, overlaps, layer spacing…layer spacing…
Special considerations Special considerations for specific for specific technologies: MAPS, technologies: MAPS, CCD, DEPFETCCD, DEPFET
Placement of readoutPlacement of readout Power, etc.Power, etc.
StepsSteps FirstFirst
Explore many Explore many configurations quicklyconfigurations quickly
Moderate AccuracyModerate Accuracy Full physics capabilitiesFull physics capabilities
Second Second Verify results with a high Verify results with a high
precision toolprecision tool
SGVSGV
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Optimization Parameters Optimization Parameters
What should be the What should be the optimization optimization parameters?parameters?
e.g. Tagging e.g. Tagging Efficiency…Efficiency…
… … or effective error or effective error on some physics on some physics process? process?
S. Xella-Hansen et al.LC-PHSM-2003-061
•ΔM ?
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Detector Optimization using a Detector Optimization using a Complete “Toy” AnalysisComplete “Toy” Analysis
Requirements:Requirements:Physics GeneratorsPhysics GeneratorsFast Simulation (SGV)Fast Simulation (SGV)Reconstruction/Analysis SuiteReconstruction/Analysis Suite
TrackingTrackingEFOsEFOsJet FindersJet FindersVertexingVertexingFlavor Tagging Flavor Tagging ……
More or lesscovered by
SGV
Not covered by
SGV(ZVTOP)
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Contribution of V. AdlerContribution of V. Adler
V. Adler has latched b-tagging used in Brahms V. Adler has latched b-tagging used in Brahms onto SGVonto SGV
Not a completely trivial procedure:Not a completely trivial procedure: Refit the resolution function to match the data setRefit the resolution function to match the data set A number of numerical issues (mostly evaluation of A number of numerical issues (mostly evaluation of
integrals)integrals) Extend range of “Joint-Probability” tag to cover impact Extend range of “Joint-Probability” tag to cover impact
parameters significances up to 200parameters significances up to 200 Tune the definition of which tracks enter into the Tune the definition of which tracks enter into the
ZVTOP procedureZVTOP procedure … … get all coordinate transformations right!get all coordinate transformations right!
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
B-tagging B-tagging
4 algorithms classify jets:4 algorithms classify jets: Impact parameter joint probability tagImpact parameter joint probability tag ““tear down” vertex findertear down” vertex finder ““most significant” tracks in the jetmost significant” tracks in the jetZVTOPZVTOP
NN gives three tagging outputsNN gives three tagging outputsB tagB tagC tagC tagB/C distinction tagB/C distinction tag
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
ExampleExamplentuple thanks to Stefania Xella-Hansen
ntuple thanks to Stefania Xella-Hansen
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Contribution of Pawel Łuzniak
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Finally: Use for Detector Finally: Use for Detector Optimization Studies:Optimization Studies:
Note: Result is compatible with results by T. Kuhl Note: Result is compatible with results by T. Kuhl using SIMDETusing SIMDET
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Some Example ActivitiesSome Example Activities
Topic 1:Topic 1:Best possible VXD vs. What do we need to do Best possible VXD vs. What do we need to do
the physics?the physics?Topic 2:Topic 2:
Develop a sensor technology that does the Develop a sensor technology that does the job.job.
Topic 3:Topic 3:How do we put sensors together to make a How do we put sensors together to make a
real detector? real detector?
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Sensor Technology ChoicesSensor Technology Choices MAPS (monolithic active pixel sensor)MAPS (monolithic active pixel sensor)
Integrated R/O and sensor in CMOSIntegrated R/O and sensor in CMOS Piggy-back on commercial developmentsPiggy-back on commercial developments Key Player: IRES StrasbourgKey Player: IRES Strasbourg
CCDCCD Long experience (SLD), large devicesLong experience (SLD), large devices Piggy-back on other scientific CCD development (Astronomy, synchrotron rad) Piggy-back on other scientific CCD development (Astronomy, synchrotron rad) Key Player: RALKey Player: RAL
DepFets DepFets Thick active volume (Depletion voltage!)Thick active volume (Depletion voltage!) Looks promising also for X-ray detectionLooks promising also for X-ray detection expensiveexpensive Key Player: (MPI Munich)Key Player: (MPI Munich)
SOI (Silicon on Insulator)SOI (Silicon on Insulator) Great interest emerging recentlyGreat interest emerging recently Key Player: CracowKey Player: Cracow
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
QuestionsQuestions
Reproduce Strasbourg resultsReproduce Strasbourg results Investigate radiation tolerance and cross check Investigate radiation tolerance and cross check
with simulationwith simulation Study device properties in detail under various Study device properties in detail under various
conditionsconditions Operate in magnetic fieldsOperate in magnetic fields Study power switchingStudy power switching Develop testbeam infrastructure (pixel Develop testbeam infrastructure (pixel
telescope)telescope) ……
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Some Example ActivitiesSome Example Activities
Topic 1:Topic 1:Best possible VXD vs. What do we need to do Best possible VXD vs. What do we need to do
the physics?the physics?Topic 2:Topic 2:
Develop a sensor technology that does the Develop a sensor technology that does the job.job.
Topic 3:Topic 3:How do we put sensors together to make a How do we put sensors together to make a
real detector? real detector?
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Contributions by J. Hauschild, B. LContributions by J. Hauschild, B. Löhr, C. Muhlöhr, C. Muhl
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY
Outlook and ActivitiesOutlook and Activities
Physics Studies:Physics Studies:Work on the list of identified reference Work on the list of identified reference
processes processes Contribute to the overall software effortContribute to the overall software effort
Push the detector technologyPush the detector technologyBuild a pixel telescopeBuild a pixel telescopeContribute to the chip designContribute to the chip design
Workout viable overall detector schemes:Workout viable overall detector schemes:Mounting/support coolingMounting/support cooling
MVD Meeting, 11/11/2003, Tobias Haas, DESYMVD Meeting, 11/11/2003, Tobias Haas, DESY