KEK

28 July 2010
Ron Settles MPI-Munich

The linear collider, its physics
and detector: status July 201028/07/2010

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

1

Outline of stories(apologies, I will be telling you things
you already know)•1 What physics do we want to do, where?
•2 What is the best detector?
•3 The LCTPC•4 Recent developments
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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Story #1
What physics do we want to do, where?

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Where?: ITRP decision 2004: COLD superconducting à la TESLA
chosenInternational Linear ColliderBaseline:

200 GeV < √s < 500 GeV
Integrated luminosity ~ 500 fb-1
in 4 years
80 % e- beam polarisation
Upgrade to 1TeV, ∫L = 1 ab-1 in 3
years
2 interaction regions
Concurrent running with the LHC from~2018 !!
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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
20104

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Physics we want to do?

•For example, from my talk at Arlington WS Jan.2003:

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Physics we want to do?

•For example, from my talk at Arlington WS Jan.2003:

Precision with 1 ab-1
from the Tesla days
too optimistic!

Δλ ≅20%λ

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Physics we want to do?

•For example, from my talk at Arlington WS Jan.2003:

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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…will come back to thisin Story#4…
‘Susy’,’New
Physics’⇒stand for⇒“Susy and/or
New Physics
or Nothing(depending on
what is foundat Tevatronand LHC)”

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Before any discoveries…

Why do we think these indirect, precision meas. willtell us anything??? The TOP@LEP, that’s why!
CERN Courier, Nov 2005:

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Electroweak
combinations:

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Compare withelectroweak
combinations
2009: still
inching forward

95% CL ⇒ 1-in-20 chance thatrate is higher than dotted curve
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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Compareelectroweakwith cmssm
combo → → →28/07/2010

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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“The linear-collider physics, its
detector, and all that…”

OF COURSE, the number of physics scenarios ismuch larger than I have shown in these few slides,
and these are being addressed in one WS after
another →→28/07/2010

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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For many
more, see

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Conclusion?
No conclusion…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Next Story:
the detector

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Story #2• What is the best detector?

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Best
Best detector?
detector?
The
The starting
starting point
point

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Best
Best detector?
detector?
The
The starting
starting point
point (for(for me)me)

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Best detector? Values for Aleph:~10⊕100μm~6x10-4/(GeV/c)~3x10-3/(GeV/c)~0.6/√E @ Zpeak

1.5

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Best detector? e.g.from my Arlington2003 talk

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Best detector?

…tightening the screws,ie…

Now 2x10-5/(GeV/c)
3x10-4/(GeV/c)

Now 0.25/√E @ Zpeak
Particle Flow

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Physics determines
detector design
 momentum: d(1/p) = 3 x 10-5/GeV(1/10xLEP)

e+e-JZHJll X goal: δMμμ <0.1x ΓΖÆ δΜΗ dominated by beamstrahlung impact parameter: δd=5⊕10/p(GeV)μm(1/3xSLD)

excellent flavour tagging capabilities for charmand bottom quarks e.g. measurement of Higgs
branching ratios

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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1. TPC Performance goals. RD question:• How was the subdetector optimized?
• ILD subdetectors must be optimized
coherently by present optimization
studies, ∴ for the TPC, this means:

σ_pt <~100⊕diffμm (rφ)

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Physics determines
detector design
 particle flow dE/E = 0.30/√E(1/2xLEP)

di-jet mass resolution distinguish W
and Z in their hadronic decay modese + e − → WWνν , e + e − → ZZνν

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60% E

LEP-like resolution

30% E

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Reminder: coherent layoutof ILD validated-VTX:perf.,min.material-TRK:perf.,min.material-CALO:granularity, P-flow

P_t > 1 GeV/c

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Michel Davier: IDAG will help the RD Sakue Yamada
monitor the progress of ILD and SiD…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Inner Detectors → this is complicated realestate where MDI, machine and detector
elements are critical…

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…as is push-pull…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Conclusion?
No conclusion…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Next Story:
the LCTPC

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Story #3• The LCTPC

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Best
Best detector?
detector?
The
The starting
starting point
point (for(for me)me)……

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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ILD Logo
goes here

TPC R&D for an LC detector @1. √s < 1 TeV
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2. √s > 1 TeV
Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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1. √s < 1 TeV
To put TPC in perspective:
info mainly from LOI andrecent lctpc collaboration
meeting
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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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LC-TPC Motivation/Goals…to be tested@the R&D where possible…
•• continuous 3-D tracking, easy pattern recognition throughout

large volume, well suited for large magnetic field• ~99% tracking efficiency in presence of backgrounds• track-topology stamping to 2 ns together with inner silicon• minimum of X_0 inside Ecal (<4% barrel, ~15% endcaps)• σ_pt ~ 100μm (rφ) and ~ 500μm (rz) @ 4T
• 2-track resolution <2mm (rφ) and <5-10mm (rz)• dE/dx resolution <5% -> e/pi separation, for example• easily maintainable if designed properly, in case of beamaccidents, for example• design for full precision/efficiency at 20 x estimatedbackgrounds
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TPC Collaboration 2009

Signees
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TPC R&D Planning1) Demonstration phase2) Consolidation phase3) Design phase• Continue work with small prototypes (SP) on mappingout parameter space, understanding resolution, etc,
to improve the design of an MPGD TPC.
• Build and operate the Large Prototype (LP), Ø ~90cm, drift ~ 60cm together with SIT prototype,with EUDET infrastructure as basis, to test
manufacturing techniques for MPGD endplates,
fieldcage, electronics. The LP has been built now
and testing of the options is underway.
• During phase 2, the decision as to which endplatetechnology to use for the LC TPC will be taken andfinal design started.

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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LCTPC performance goals

GEM gasgas-amplif.
amplif. for a TPC• R&D plans/options
Present goals based on results from small
prototypes using cosmics or beams at KEK,
DESY, CERN. Three options left →Silicon Pixel Readout for a TPC

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2010

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“Present goals based on results from small
prototypes using cosmics or beams at KEK,etc”
The options MWPC and Micromegas without
resistive anode were mainly ruled out withthe tests using the MP-TPC here at KEK…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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TPC R&D summary to date
• Now several years MPGD experience gathered• Gas properties rather well understood• Limit of resolution understood• Resistive-anode charge-spreading demonstrated• CMOS RO demonstrated• Gas-amplification techniques ruled out with SPs•MWPC•Micromegas without resistive-anode• Work in progress on the Large Prototype

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Large Prototype TPC
Performance goals…

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LCTPC performance goals…

…to be verified (or revised) after tests
on the Large Prototype:28/07/2010

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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• Software goals: Develop
MarlinTPC to reconstruct:• Technology’s signals (GEM,
Micromegas, Pixel)• Correct distortions (B,Efields)
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LP - MicroMeGaS
Saclay, Carleton, Kolkata
working.......

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Double GEM (JGEM)
About 3200 channels readout electronics(Altro/Alice)
KEK, Saga, Nagasaki, JTPC, CERN,
Lund, Siegen working…
(10000 channels later in 2009)28/07/2010

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July2010

Triple-Gem
being
prepared by
Desy group53

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Bonn, Freiburg, Nikhef working.......

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From Addendum2009…will say more about thisat the end of this talk if there is time…

DBD

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> 1 TeV

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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NO DIFFERENCE for CLIC,
because this is ~ best you can dowith standard readout.
What about pixels?
Potentially more accurate (see talks
by Jan Timmermans)…
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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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CLIC-ILC continuing at
LCWS2010 Beijing…

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final Story:
the linear collider
collider,, its
physics and all that…
that…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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Of course it is true, that what
LHC finds will be important for
our future. Nevertheless my
Tevatron friends and I havebeen somewhat annoyed by theemphasis on LHC results while‘forgetting’ the Tevatron.

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Of course it is true, that what
LHC finds will be important for
our future. Nevertheless my
Tevatron friends have beensomewhat annoyed by theemphasis on LHC results while‘forgetting’ the Tevatron.
Well, here’s the next episode: I
told you the story about the
Aleph 20y party last year…

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Electroweak
combinations:slow progress at
first, but now‘accelerating’.
Status at thetime of Gavin
Davis’ talk→CL
95% CL95%⇒ 1-in-20
chance that rate is higher than dotted curve

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28/07/2010

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ICHEP electroweak

combinations: 95% CL

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Electroweak
combinations LLR,
same story:
April 2008

April 2007

March 2009

Log liklihood ratio ⇒ -2 x ln (prob s+b / prob b)
zero=no signal, above bkgd-like, below signal like
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ICHEP electroweak

combinations: LLR

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Electroweak
again:

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Deja vu???

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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Well,
I don’t know what to say
more about the Higgs,
except…

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Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
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…except that in addition we have LEP events…
ALEPH

DALI_F1

ECM=206.7 Pch=83.0 Efl=194. Ewi=124. Eha=35.9 BEHOLD
Nch=28
EV1=0
EV2=0
EV3=0
ThT=0
5 Gev EC
5 Gev HC

Run=54698
Evt=4881
Detb= E3FFFF

00−06−14 2:32
(φ −138)*SIN(θ)
oE
McmHreco(GeV/c2)ln(1+sln(1+s/b)
115 GeV/c2

206.7
o

4-jet

114.3

1.73

206.7

4-jet

112.9

1.21

206.5

4-jet

110.0

0.64

206.4

E-miss

115.0

0.53

206.6

4-jet

110.7

0.53

4-jet

114.3

0.49

Lept

118.1

0.47

Tau

115.4

0.41

4-jet

114.5

0.40

4-jet

112.6

0.40

(GeV)
GeV)

−

−

−ALEPH

x

o

1

Decay
Channel

Expt
x

o

ox
xo−o
2ox o ALEPHooooxo
3 x ALEPHx
−

0.6cm

…the Higgs?

−
L3

−oxo
o

x

5

OPAL

6

Delphi

7

ALEPH

8

ALEPH

−9

ALEPH

10

OPAL

206.7

o
o

o o
205.0
o

o
xx− x
−
o
x
208.1
o x

−
x −
− 206.5
o
o
−
o

205.4
o

o
o

RO TPC

0.3cm

Y"

x

μ

−1cm
P>.50 Z0<10 D0<2

0
F.C. imp.

28/07/2010
End of tracks
detector

1cm

X"

15 GeV
θ=180

x

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

Made on 29-Aug-2000 17:06:54 by DREVERMANN with DALI_F1.
Filename: DC054698_004881_000829_1706.PS_H_CAND

o

4

θ=0

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…and now Tevatron candidates…

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28/07/2010

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…3 more years of Tevatron running,a manpower problem?

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The Winter 2010/11 episode could
give a fluctuation back in the otherdirection,nevertheless…
my favorite scenario:
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‘Susy’,’New
Physics’⇒stand for⇒“Susy and/or
New Physics
or Nothing(depending on
what is foundat Tevatronand LHC)”
28/07/2010

u
o
Y

w
a
s

s
i
th

y
d
a
re
l
a

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010

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ILC
Machineconstructin
phasesIncrem.investm.
for build/installing

2019

1

2020

230

300

3

2023

400

200

2

2025

4

+y

+y

2029

6

+y

+y

1 higgs 2013-19
4.1Gilcu(2.9G€)
2 top
2020-23+1.2Gilcu(0.9G€)
3 hhhsusy2024-25+0.7Gilcu(0.5G€)
4 tthsusy2026-29+1.8Gilcu(1.3G€)
Sum.invest.
7.8Gilcu(5.6G€)

2
2

~20y
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Machine Constr./Installation

Physics Running

PHASE
INVEST

T=0Build230GeV

Comm
higgs
ission1

4.1Gilcu(2.9G€)

+170

ttbar

2

1.2Gilcu(0.9G€)

hhh/susy

0.7Gilcu(0.5G€)+1003
tth/newphysics

+250

y
2013

2016

28/07/2010

2019

2022

2025

2028

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July2010

91/160GeV

2031

2034

4

1.8Gilcu(1.3G€)
Zpeak,WWthr

2037
83
Slide 83

And by 2040, one may haveunderstood how to build a multi-TeV
linear collider, so:

CHANGE THE
TECHNOLOGY IN THE
ILC TUNNEL…
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Conclusion

Evidence is evolving tobe ever stronger forthe low-energy linear
collider!
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No time left for the next
ones?

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TPC preparations for the DBD

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TPC Parameters for ILD
Integration and the DBD
Status 3 June 201028/07/2010

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« MDI parameters»
Readjust the sizes
from iteration #1 (theLOI) for Catherine
Clerc. Reminder: we
propose to define one“generic” TPC (not two)for MPGD (i.e., neither
μgas- nor gem- specific).

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Adrian’s simulation: bottom line ⇒ want small pads
Rows: Height × 5 × 10
Pads: 5 × Width × 10
Bins: 5 × 5 × Depth

simulation artifacts
possible1
TPC Occupancy [%]Width=1.27mm,
Height=5mm,
Occupancy=0.02% for
γ’s, e’s, n’s and
100BX: 0.02%Occ ≈0.02fC/cm^3 vol.chg!

0.1

1

in
y
c
n

e

nd
e
p
e

ak d

we

2

5

10

20

z
from the LOI

50

Size [mm]28/07/2010

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“Generic” again means don’t worry about
sector/module shapes here. Suggestions will be madeas to subdivide our readout units so that whatever
shapes we decide on might be accomodated.

Also the shapes we decide on will depend on theoutcome of Dan’s et al studies…

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And Dan et al have started …

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# Channels--64 pads/S-Altro--16 S-Altro/Smodule-- 8 Smodules/ROB8⇒--1024 pads/Smodule--8192 pads/ROB8--244 ROB8/endcap--1998848 pads/endcap
Of course, different ROBn can be used across theendcap, depending on the shapes of the different
ROBs. smodule and ROB8 are just starting points…
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Cooling (slide from mtg103)
Also, these two strategies are different: Bart cools atimepix chip. This corresponds roughly to one ROB in a pad
TPC (a “cooling unit”) = 11 W at 40MSPS, where Antoine’s“cooling unit” is one S-Altro = 0.05 W at 40 MSPS.

At Aleph, our “cooling unit”
was ~ 1 W, roughly equivalent
for this lctpc case 1 Smodule= 16 S-Altros= 0.7 W at 40 MSPS or= 0.4 W at 10 MSPS. Should
Bart use this?
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Takahiro and Hugo are developing a dummy board totest cooling and power switching …

Status ofAdvanced
EndplateDummy

EVO meeting on Jun/2/2010
Takahiro Fusayasu
Nagasaki Institute of Applied
Science
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X_0 Thicknesses (slide from mtg103
Sum of these plus S-Altros~ 5 % X_0
Dan estimated at last meetingthe space-frame thickness~ 8 % X_0 for the LP size. We don’tknow yet how this translates to the
LCTPC size.
Cooling (my guess, needs
confirmation)~ 2% X_0
Cable layout --- work in progress --but it looks like the above X_0 may be
doubled due to low voltage supply.
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Takeshi, Klaus, Peter, Ralf et al

Proposal: add 10% for low voltage power(Luciano thinks “conservative, but o.k.”)28/07/2010

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« How about another story?»
The TPC endcap thickness is a “problem”

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2010

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Part 2 of 2008 eMail to ild-optimization maillist

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X_0 Thickness: study by MarkThomson and Steve Aplin
Jet energy resolution as function of
endcap region .8<cosΘ<.9 radiation lengths

28/07/2010

45GeV

100GeV

250GeV

15%X_0.28±.01.32±.01.47±.02

30%X_0.30±.01.31±.01.47±.02

45%X_0.30±.01.32±.01.52±.02

60%X_0.32±.01.33±.01

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Next steps⇒ X_0 endcap conclusion: NOT CRITICAL!!
Can leave 15% or use 30% again (like before theLOI) if not too much trouble.

⇒ Endcap mechanical thickness: Steve and Mark working.

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LCTPC milestones
2006-2012

Continue LCTPC R&D via small-prototypes
and LP tests

2012

DBD

2013

Decide on all parameters

2014

Final design of the LCTPC

2018

Four years construction

2019-20

Commission/Install TPC in the ILC Detector

28/07/2010

Ron Settles/MPISettles/MPI-Munich@ KEK, 28 July
2010102