30
F1 Contribution to ILC Vertex Detector Tobias Haas 23 Febuary 2005

porter
• Category

Documents

• view

51

0

description

F1 Contribution to ILC Vertex Detector. Tobias Haas 23 Febuary 2005. Linear Collider Basics. LEP gave ~ 1 fb -1 /expt. in 11 years, with 10 7 Z 0 LEP1 At √s = 500 GeV one needs 500 fb -1 to get: ~ 30,000 Zh 120 ~ 50,000 h 120 νν 10 6 W + W - - PowerPoint PPT Presentation

Transcript of F1 Contribution to ILC Vertex Detector

F1 Contribution to ILC Vertex Detector

Tobias Haas23 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, with /expt. in 11 years, with

101077 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 efficiencyhigh purity and efficiency

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

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 ActivitiesTopic 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 ActivitiesTopic 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 ActivitiesPhysics 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 effortPush the detector technologyPush the detector technology

Build 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