Transcript SiD design study H.Weerts Silicon Detector Design Study H.Weerts Fermilab / Michigan State University ECFA 04, Durham, Sept.

SiD design study
H.Weerts
Silicon Detector Design Study
H.Weerts
Fermilab / Michigan State University
ECFA 04, Durham, Sept. 04
SiD design study
Intro & history
“Once upon a time” SiD effort started at SLAC
H.Weerts
A lot of effort,
start & study
basic concept
ALCPG , with approval of WWS, initiated Silicon based
detector design study based on above
John Jaros and Harry Weerts were asked to launch it
This is the first time you hear about this & we are starting
( So there is not that much to say !!)
Question (on acronyms):
Were ILCSC, LCWS, ELCPG, ALCPG, BLCXX and HLCPG consulted on
actions by USLCSC with involvement of ICFA and blessing by IUPAP ?
What about NSF, DOE, NSERC, P5, ITRF, DPF and APS ?
ECFA 04, Durham, Sept. 04
SiD design study
Goals
H.Weerts
Design Study of a silicon based detector for ILC
Main goal now: cost estimate for concept by Fall 2005.
Resulting in a document describing a conceptual design &
performance ( not necessarily a CDR) evolved over last month
Studies have to allow a comparison of designs
That is the technical part
The other part
It is not a collaboration
It is not exclusive i.e. any group or person can join
and contribute to more than one design study
It is global
ECFA 04, Durham, Sept. 04
SiD design study
Evolution/Globalization
H.Weerts
GOAL
( now ECFA and ACFA
in November)
Evolve in next few months:
SLAC+
USERS
SLAC & FNAL
+ users
You
are
here
Start small
and
practical
Complete this before
major organizational
decisions are made, but
start work
Flags by courtesy of CIA………
ECFA 04, Durham, Sept. 04
SiD design study
Logos……
H.Weerts
Important part of starting anything in physics
(not all serious)
First logo version by SLAC designer
(on upcoming WEB page)
………………………..
More to come by future participants
SiD WEB page:
http://www-sid.slac.stanford.edu
If you are interested …….. sign up here
ECFA 04, Durham, Sept. 04
SiD design study Basic Idea & Assumptions for SiD
H.Weerts
(NOT: to study a small detector)
• ILC detector based on a integrated, optimized and hermetic
design
• Aggressive & High performance detector
• Constrain cost and use that from the beginning as a constraint
• Optimize the integrated physics performance of the subsystems
• Assume “particle/energy” flow concept in overall detector design
( needed to achieve physics performance)
• Use silicon as the main detector element for all tracking
In some sense this started as a response to a “Standard” e+e- detector
( can it be done a different way ???)
ECFA 04, Durham, Sept. 04
SiD design study
SiD starting point (1)
H.Weerts
Starting point: SiD concept
•Accept notion that excellent
energy flow calorimetry is
required, and explore
optimization of a TungstenSilicon EMCal and the
implications for the detector
architecture…
ECFA 04, Durham, Sept. 04
SiD design study SiD starting point/motivation (2)
H.Weerts
 Robustness of silicon against unexpected beam conditions/loss
 Silicon is expensive, so limit area by limiting radius
 Get back BR2 by pushing B up (~5T)
 Maintain tracking resolution by using silicon strips in tracker
 Buy safety margin for VXD with the 5T B-field ( limit radial
extent of pair background; smaller radius for VXD.)
 Make full use of 5 VXD space points for pattern recognition
ECFA 04, Durham, Sept. 04
SiD design study
SiD concept overview
Very schematic drawing; more later
H.Weerts
Quadrant View
8.000
R
Beam Pipe
Ecal
7.000
Hcal
Coil
MT
6.000
Endcap
Muon system
5.000
Endcap_Hcal
m
Endcap_Ecal
3.000
EMCAL Si-W
VXD
4.000
2.000
Track Angle
Endcap_Trkr_1
5T coil
Endcap_Trkr_2
Endcap_Trkr_3
HCAL
Endcap_Trkr_4
Endcap_Trkr_5
Tracking- silicon
1.000
Trkr_3
0.000
0.000
VXD
Trkr_2
Trkr_4
2.000
4.000
6.000
m
Z
8.000
Trkr_5
Trkr_1
NOT A SMALL DETECTOR
ECFA 04, Durham, Sept. 04
SiD design study
SiD concept sizes
H.Weerts
Overall SiD
Size of VXD
outer cryostat
and EMCAL
(EMCAL inner radius larger than
Dzero EM cal radius)
ECFA 04, Durham, Sept. 04
SiD design study
Tesla
Vertex detector
H.Weerts
0.2
SiD
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
-0.2
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
Build on SLD/VX3 success
Radius: inner ~1 –1.5cm outer 10cm, 0.2% X0
Extend 5 layer tracking over max  (5 barrel + 4 forward layers)
improve  Coverage, improve σxy, σrz
5 CCD layers
cos q < .97
4 CCD layers
cos q < .98
Minimize CCD area/cost
 Shorten Barrel CCDs to 12.5 cm (vs. 25.0cm)
Thin the CCD barrel endplate
Simulations of this geometry done already
ECFA 04, Durham, Sept. 04
SiD design study
Tracking
H.Weerts
 Silicon; Inner radius 20cm outer radius 125cm; 5 layers
 SLC/SLD Prejudice: Silicon is robust against machine
mishaps; wires & gas are not.
 Silicon should be relatively easy to commission – no td
relations, easily modeled Lorentz angle, stable geometry and
constants.
 SiD as a system should have superb track finding:
 5 layers of highly pixellated CCD’s plus
 5 layers of Si strips, outer layer measures 2 coordinates
 EMCAL provides extra tracking for V finding - ~1mm
resolution!
 Minimize material before endcap calorimeter
 Simulation Studies have been and are underway
 Hardware developments (just starting)
 Effort on ASIC…….. adapting for long bunch trains
 Structure design work starting at FNAL
ECFA 04, Durham, Sept. 04
SiD design study
Silicon Tracking (cont’d)
H.Weerts
Structure and mechanical considerations


Ladder configurations under study.
Minimal electronics and power pulsing make gas cooling easy. No
liquids, leaks or associated mass.
Initial thoughts on
support structure
Support structure by Fermilab
Use double carbon fiber support
cylinders for each barrel
Long ladders evolved to shorter
structures & cylinders
ECFA 04, Durham, Sept. 04
SiD design study
SiD EMCal concept(1)
Inner radius: 1.25m , outer radius 1.41 m; 29 X0
H.Weerts
Design
driver
30 or fewer long. samples
Consider other technologies ??
ECFA 04, Durham, Sept. 04
SiD design study
SiD concept EMCal (2)
H.Weerts
Wafer and readout chip
Concept: many channels
(1-2K) on one ASIC
ECFA 04, Durham, Sept. 04
SiD design study
HCAL
H.Weerts
Inside the coil
Inner Radius ~ 1.42m, outer radius ~ 2.44m; thickness ~4L
34 samples; 2cm Fe, 1 mm gap
Technology not specified, dependent on ongoing vibrant
Calorimeter R&D
Digital or Analog or mix
RPC’s
Several possibilities: GEM’s
Scintillator ( SiPM, APD,……)
Initial starting assumption: use Fe as absorber
Have started to look at this with “detector on a spreadsheet”
ECFA 04, Durham, Sept. 04
SiD design study
Solenoid
H.Weerts
Inner radius: ~ 2.47m to ~3.32m, L=5.4m; Stored energy ~ 1.1 GJ
Need feasibility study in next year to at least convince ourselves
that 5T can be built .
Expertise not readily available. CMS solenoid sets
current scale.
250.00
200.00
Cost [M$]
150.00
Linear
Power
Exp Data
100.00
Cost
model
50.00
0.00
0
0.5
1
1.5
2
2.5
SiD
3
3.5
4
Energy [GJ]
Does physics really require 5T?
ECFA 04, Durham, Sept. 04
SiD design study
Muon system/Flux return
H.Weerts
Inner Radius ~ 3.35m, outer radius ~ 6.34m;
44 layers; thickness ~14L
Flux return and muon ID, as well as tail catcher for HCal
Technology not specified, dependent on ongoing Muon R&D
Possibilities:
RPC
GEM
Scintillator (PMT and Si-PM)
ECFA 04, Durham, Sept. 04
SiD design study
Performance criteria
H.Weerts
Should be agreed upon with other detector design studies
Use standard processes: nnWW, nnZZ, t-tbar, HZ + some SUSY ?
Define Physics Benchmarks. How to approach this ……..
Will be forced to start with imperfect tools
Use existing tools & algorithms……. even if incomplete
(More from Jim Brau tomorrow)
ECFA 04, Durham, Sept. 04
SiD design study
Cost
H.Weerts
Very preliminary cost estimate ( in WBS structure !) exist
Only showing that tool exists
ECFA 04, Durham, Sept. 04
SiD design study
First steps…..
H.Weerts
What has happened since Victoria, ALCPG meeting ?
Created 2 page document with a draft of initial questions and
issues to be addressed by the study. Currently some emphasis on
calorimeter layout in those questions ( driving force) and we have
had one meeting with some of the groups, present at Victoria, and
interested in calorimeter to discuss this.
Need anybody who interested to get involved……….
Jim Brau’s talk tomorrow contains more info and will go
through some of the questions
ECFA 04, Durham, Sept. 04
SiD design study
SiD on a spreadsheet (1)
H.Weerts
Tool by M. Breidenbach
Parameterize the major subdetector boundaries and parameters
Put in cost for materials ( per kg for absorber)
Cost for detector elements ( per m2)
A solenoid cost model
Create sliders to change parameters like absorbers, gaps,
barrel/forward transition, BR2, HCAL in or out of coil, etc
Allows one to:
Make a simple drawing detector
Track components/material needed for options
Do simple cost comparisons of options
Identify cost drivers
Very useful tool for overall detector concept/design
ECFA 04, Durham, Sept. 04
SiD design study
H.Weerts
Info not in
online talk
SiD
Spreadsheet
ECFA 04, Durham, Sept. 04
SiD design study
SiD on a spreadsheet (2)
H.Weerts
Some examples of cost ( cost and d(cost)/d(parameter):
Fixed B, Vary R_Trkr
HCal Thickness
300.0
250.0
250.0
200.0
200.0
Hcal Cost
150.0
d$/dL
M$
M$
300.0
100.0
100.0
50.0
50.0
0.0
cost
150.0
d$/dR
0.0
0.0
2.0
4.0
6.0
8.0
HCal Lam da
Change Hcal thickness
( units L)
0
0.5
1
1.5
2
R_Trkr (m )
Fix B and increase
outer R of tracker
ECFA 04, Durham, Sept. 04
SiD design study
HCal original/starting point
H.Weerts
Hcal considerations
Fe ; sample 2cm=1.1X0
W absorber; sample 1.1cm=3.1X0
34 samples; 4 L
34 samples; 4 L
38 X0 ; DR=1.02m
110 X0 ; DR=0.74m
Quadrant View
8.000
8.000
7.000
7.000
6.000
6.000
5.000
5.000
m
m
Quadrant View
4.000
4.000
3.000
3.000
2.000
2.000
1.000
1.000
0.000
0.000
1.000
2.000
3.000
4.000
5.000
m
Starting point
6.000
7.000
8.000
0.000
0.000
2.000
4.000
6.000
8.000
m
Smaller, denser
ECFA 04, Durham, Sept. 04
SiD design study
HCAL drivers(2)
H.Weerts
Hcal considerations
W absorber; sample 1.1cm=3.1X0
34 samples; 4 L
110 X0 ; DR=0.74m
W ; sample 0.7cm =2X0
55 samples; 4 L
110 X0 ; DR=0.94m
Quadrant View
8.000
8.000
7.000
7.000
6.000
6.000
5.000
5.000
4.000
4.000
m
m
Quadrant View
3.000
3.000
2.000
2.000
1.000
0.000
0.000
1.000
2.000
4.000
m
6.000
8.000
0.000
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
m
Current favorite ……
ECFA 04, Durham, Sept. 04
SiD design study
Hcal options ( examples of costs)
Fe ; sample 2cm = 1.1X0
34 samples; 4 L
38 X0 ; DR=1.02m
W ; sample 0.7cm =2X0
55 samples; 4 L
110 X0 ; DR=0.94m
Cost drivers
Muon
14%
Cost drivers
Si_tracker
3%
Muon Si_tracker
2%
10%
Si_tracker
EM Cal
36%
H Cal
Muon
H Cal
4%
Total: $238M
EM Cal
30%
EM Cal
Solenoid
Solenoid
43%
H.Weerts
Si_tracker
EM Cal
H Cal
Solenoid
34%
Solenoid
Muon
H Cal
24%
Total: $290M
Cost for comparison only
ECFA 04, Durham, Sept. 04
SiD design study
SiD Design Study endpoint
H.Weerts
Even though we have a starting point, the resulting final
optimal detector configuration is not clear.
Will depend on results of study, new ideas, inputs, simulations
and last but not least the participants in the study
ECFA 04, Durham, Sept. 04
SiD design study
Meeting tomorrow
H.Weerts
SiD Design Study “ECFA Kick-off” meeting
On Saturday Sept 4, 2004 in OC-218 room
from 14:00-17:00
Everybody
welcome
(Please sign up for meeting if you have not )
Plans for SiD Design Study
J.Jaros
Critical Questions/Issues for Study
Agenda:
Status of Simulation
J.Brau
N.Graf
General Discussion, Questions,
Expressions of Interest
Next Steps
H.Weerts
ECFA 04, Durham, Sept. 04
SiD design study
H.Weerts
Obviously no conclusions yet
…
….
because work is ahead of us
We have started
ECFA 04, Durham, Sept. 04
SiD design study
SiD
Relative Detector Configurations
Tesla
H.Weerts
LD
From Sachio Komamiya
ECFA 04, Durham, Sept. 04
SiD design study
HCAL drivers(3)
W ; sample 0.7cm =2X0
55 samples; 4 L
110 X0 ; DR=0.94m
H.Weerts
Fe ; sample 1.2cm=0.7X0
56 samples; 4 L
38 X0 ; DR=1.23cm
Quadrant View
Quadrant View
8.000
7.000
7.000
6.000
6.000
5.000
5.000
4.000
4.000
m
m
8.000
3.000
3.000
2.000
2.000
1.000
1.000
0.000
0.000
1.000
2.000
3.000
4.000
m
5.000
6.000
7.000
8.000
0.000
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
m
ECFA 04, Durham, Sept. 04
SiD design study
HCAl drivers 1
Fe ; sample 2cm = 1.1X0
34 samples; 4 L
38 X0 ; DR=1.02m
H.Weerts
Fe ; sample 1.2cm = 0.7X0
56 samples; 4 L
38 X0 ; DR=1.23m
Quadrant View
8.000
8.000
7.000
7.000
6.000
6.000
5.000
5.000
4.000
4.000
m
m
Quadrant View
3.000
3.000
2.000
2.000
1.000
1.000
0.000
0.000
1.000
2.000
3.000
4.000
m
5.000
6.000
7.000
8.000
0.000
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
m
Starting point
ECFA 04, Durham, Sept. 04
SiD design study
SiD on a spreadsheet (3)
H.Weerts
Detector configurations:
Quadrant View
8.000
8.000
7.000
7.000
6.000
6.000
5.000
5.000
4.000
4.000
m
m
Nominal
Quadrant View
3.000
3.000
2.000
2.000
1.000
1.000
0.000
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
m
R_tracker=1.25m, Hcal= 4L, Fe
Cost: ~$268M
0.000
0.000
1.000
2.000
3.000
4.000
5.000
6.000
7.000
8.000
m
R_tracker=1.66m, Hcal= 6L, Fe
Cost: ~$348M
ECFA 04, Durham, Sept. 04
SiD design study
H.Weerts
ECFA 04, Durham, Sept. 04