Transcript No Slide Title

CMS MU
Institution Board
IB chairs
D.Reeder
( M.Cerrada )
Technical Board (Steer.Comm.)
P.Managers
I.B. Chairs
R.Manager
Tech. Coords
Task Coords.
F.Gasparini G.Mitselmakher
D.Reeder M.Cerrada
C.Peroni
H.Reithler R.Loveless
G.Iaselli (rpc)
T.Rodrigo (alignment)
U.Dosselli (DT)
C.Willmott (DT El.)
A.Korytov (CSC)
TY Ling (CSC El.)
I.Golutvin (ME1/1)
W.Ko (software) G.Wrochna (TRIDAS link)
BARREL
ENDCAPS
Project leader
Technical Board
F.Gasparini
Tech.Coord.
H.Reithler
SPO
U.Dosselli
H.Reithler
S.Maselli
D.Dattola
G.Bencze
G.Iaselli
Planning
Safety
QA&QC
Integration
Alignment
RPC
Tech.coordin.
H.Reithler
DT chambers
U.Dosselli
DT electronics
C.Willmott
RPC
G.Iaselli
RPC electronics
A.Ranieri
Alignment
T.Rodrigo, G.Bencze
TRIDAS link
G.Wrochna
Software
U.Gasparini
Integration (detect.) D.Dattola
(services) H.Reithler
Resource Manager
C.Peroni
BARREL
muon
Finance Board
M.Cerrada Spain
D.Rein
Germ.
G.Zumerle Italy
R.Loveless US
V.Karjavin
RDMS
Drift Tubes Committee
H.Reithler
M.Cerrada
C.Peroni
A.Rossi
U.Dosselli
G.Zumerle
C.Willmott
1)
MU Identification
2)
MU Level 1 Trigger with Threshold up to 100 GeV
3)
MU measurement
1) is performed by 4 Muon Stations looking for particles penetrating
through the large and segmented return Yoke of the CMS Magnet
2) bunch crossing Identification & fast standalone Pt measurement using
precision chambers and fast RPC detectors in each station
3) precision and redundancy : 6 layers CSC in the Endcaps (1000 m2)
8  layers DRIFT TUBES in the Barrel
(+4  layers) (1800 m2)
fabrizio 15/5/2000
THE BARREL MU
long drift time tubes are cheaper than MWPC
more sensitive to magnetic field,delta rays and e.m.showers
use of cool gas (Ar/CO2),accurate field shaping (4 electrodes), many staggered layers
redundancy generates robustness against neutron and e.m. background
and allow prompt measurement of time , position and angle of passage of a track for MU
trigger
design requirement:
reconstruction of tridimensional track segments/station within 150
micron in position and 1 mrad uncertainty in the bending plane
this translates into:
8 layers in the bending and 4 layers in the non bending projection
300  precision/wire and an adequate lever arm/station
.5 to 1 mm chamber positioning for efficient track identification
150 to 400  positioning for precise standalone Pt
fabrizio 15/5/2000
Magnetic and radiation environment (Barrel)
Magnetic Field
highly inhomogeneous
can locally reach
.8 T perpendicular to the wire plane (MB1)
.3 T parallel to the wires (ch. borders&corners)
neutron
<104 Hz/cm2 (MB1 And MB4) (1010/cm2 in 10 years)
absorbed dose
<< 1 Gy /10 years operation in the worst case
HIT rate
< 10 Hz/cm2 (1 to 10 KHz/wire or RPC channel)
collected charge
. 5 C/cm of wire (1 hit=4*MIP,100 Hz/cm2,gain 10^5)
fabrizio 15/5/2000
BARREL MU
INSTITUTES & LABORATORIES
Aachen
Bari
Beijing
Bologna
CERN
CIEMAT
Debrecen
Islamabad
Padova
Pavia
Peking
Santander
Sofia
Sofia
Torino
Warsaw
Wien
RWTH III A
Univ.-INFN
IHEP
Univ.-INFN
Mic - CMT
K.L.Univ.
Opt.Lab.
Univ.-INFN
Univ.-INFN
Univ.
IFCA-Univ.
INRNE
Univ.
Univ.-INFN
SoltanINS
HEPHI
drift chambers
RPC
drift chambers
drift chambers
drift chambers
drift chambers
alignment
alignment
alignment
alignment
drift chambers
RPC
RPC
alignment
RPC
RPC
drift chambers
RPC
alignment
TECHNICAL COLLABORATIONS
Protvino
Dubna
IHEP
JINR
fabrizio 15/5/2000
drift chambers
drift chambers
2000 is a critical year:
*volume procurement of raw materials
*volume production of parts :mechanical & electrical
**setting up of the assembly sites
*preproduction of parts for chambers of 2000
*production of first chambers in three (/four) sites in 2000
**setting up of the sites for parts production
*begin volume production of parts
*design of tools for installation
*preparation for the assembly of the Yoke wheels in 00 and 01
*tendering for volume production of TDC and Trigger electronics
*2000 is the most expensive year , commitments/payments
limited by the funding profile
fabrizio 15/5/2000
status :
- chamber design is finished
- design of tools for chambers finished
- design of tools for parts finished
- assembly/commissioning of tools is in good progress
- first SLayers (MB2) assembled in Madrid with final tools
- R&D of trigger electronics still going on
- progress in HV and LV supplies
- first samples of TDC available in July
- radiation test is in progress and planned in view of ESR
in Autumn
fabrizio 15/5/2000
DT Chambers Production sharing
5
4
3
2
6
1
7
12
8
9
Chambers that can’t
be installed in SX
10
11
Aachen
Madrid
Padova
Torino
THE DT CHAMBERS (Z view)
plates
I-Beams
MB4
MB1
200 ~ 400cm
27cm
250cm
beam line
Pads for RPC
suspension
HV& decoupl. Boards
F-End
R-Out &
Trigger
Mini
crates
Honeycomb & integrated C-Beams
RPC and DT are inserted in the yokes as a unique body (constraint in prod. & install. Schedules)
fabrizio 15/5/2000
THE DT CHAMBERS (X,Y VIEW)
plates
I-Beams
27cm
MB1
2
3
MB4
250cm
200 ~ 400 cm
HV& decoupl. Boards
Pads for RPC
suspension
F-End
Alignment LEDs/holders
Suspension “scale”
Honeycomb & integrated C-Beams
fabrizio 15/5/2000
Suspension rails
screwed to the yoke
S
C
g
s
continuous lines represent electrodes
a
W
b
b/a ~ .65
dotted lines represent equipotential surfaces
the position of the s equipotential depends
on the cell geometry (i.e. on the strip width
and on the wire radius)
the presence of the grounded Al plates and
beams between S and C makes the position
of the g equipotential quite independent of
the Voltages of s and c
Vw-Vs determines the GAIN in the gas :
the request of a gain of ~ 10^5 determines
the position of the s equipotential to be
~ 2.5 mm from the wire
Vc ( and Vs) must generate in the region
between c and g ( and between g and s )
an E field between 1 and 2 KV/cm to
saturate the drift velocity
fabrizio 28/3/00
For practical and safety reasons many components
are inside the gas volume of the chamber
An intensive campaign of measurements to identify
possible aging effects from these materials was
organized and done ( and will continue,for safety
reasons,to check each delivery of materials):
-
glues on Mylar and Aluminum strips
bare HV,Decoupling and F-End Boards
cables & connectors
fully equipped boards
Many components were investigated also after
neutron irradiation (@ PROSPERO ,Valduc,F)
- to look for effects from FR4.
- for effects on structural glues
(results are published ,or submitted, as CMS N.,IN.,scient.papers)
fabrizio 28/3/00
AGING & IRRADIATION MEASUREMENTS:
In the aging set up in LEGNARO:
In magnetic field
Aging measurement were performed on Mylar
and Aluminium strips to be used for cathode
and field shaping electrodes.Strips were tested
with and without glue.
No aging was detected for >10 LHC years.
prototypes of LV supply up to 1 T POSITIVE
Pieces of I-Beams and Al .Plates to check for
possible effects of cleaning solvents (I-Beams)
and of surface treatment (plates).
HV and Fend Boards with components&cables)
No aging was detected.
In the LEGNARO 7 MeV V.d.G.
neutrons (6.5 MeV) and thermal n.
contr.board+BTI+TSS 20 faults in 10 y of LHC
F-End
300 hits in 10 y of LHC
With High energy neutrons (>20 MeV)
Electronics and supplies will be tested against
effects of neutrons up tp 70 MeV in the facility
of the UNIVERSITE’ CATHOLIQUE de LOUVAIN
in Belgium .
Two beams are available with enegry tunable
up to 65 MeV:
-one with a broad,nearly flat,spectrum with
20 * 20 cm2 cross section,and an intensity of
3.6 * 10^7 n/cm2/sec
-a second ,”monochromatic” and of few cm2
with intensity of 1.7 * 10^5 n/cm2/sec
The first is ideal to test complete boards ,the
second will be used to verify critical components
In nuclear reactors (Valduc,F. and in Spain)
Glued samples and electronics components and
boards Prototypes of HV (Caen) and LV (Crisa)
supplies 5 * 10 ^ 12 neutrons/cm2 NO DAMAGE
fabrizio 15/5/2000
The first run ,with the broad beam,is planned
by the end of June 00.
MECHANICAL TESTS:
the chamber mockup was proven
- to comply with seismic French rules
- to be capable of supporting the RPC charge
TEST BEAM ACTIVITY: (most significant)
one prototype, 3 SL, 3*1 m2, put in GIF in 1987/98
for the equivalent of 6 to 8 LHC years
the first MB2s will be put in the GIF this winter coupled to
RB2 RPCs
the first full chamber (MB96, a MB1 type) was in H2 in 97
and in the GIF,to test rate capability,in summer 98
a “final” SL (Q4) was in the magnet in the H2 beam in 99
(B parallel to the wires) and will be in 00 (B perpendicular)
fabrizio 15/5/2000
The smallest independent unit is the Super Layer
chambers are built by gluing together three or two (MB4) SLs
operations for the mechanical assembly of one SL:
9 gluing operations/superlayer
9 w.days /superlayer
2 Workers + 1 Supervisor
glue
9
6
5
2
1
fabrizio 15/5/2000
7
4
3
8
CHAMBER ASSEMBLY BRICKS
plates+strips
Torino preprod.+Dubna mass prod.
I-Beams+cathodes
Bologna preprod+Protvino mass prod.
H-Comb+C-beams
firm preprod + firm mass prod.
HV Boards
Padova preprod+IHEP mass prod.
F-Ends+Boards
firm
+ minicrates [readout+trigger boards]
preproduction allows the construction of few chambers during 2000
~
fabrizio 15/5/2000
2MB1, 7 MB2, 5 MB3
Nov. 99
Plans and status
assembly site
# of tables
Aachen
3
Legnaro
3
type of chamber (#)
MB1 (70)
MB3 (70)
MB4 (10)
ready
in production
June 2000
Sept. 2000
March 2000
May 2000
(Sept.2000)
Madrid
3
MB2 (70)
Jan.2000
May 2000
(1st MB2 SL: test)
Torino
1
MB4 (30)
fall 2000
Jan 2001
(Jul.2001)
Volume production of plates (Dubna)
Sept.2000
Oct. 2000
(shipment to)
Volume production of I-Beams (Protvino)
June 2000
Oct. 2000
(shipment to)
HV and Decoupling Boards (IHEP)
Volume production of F-Ends
Dec. 1999
Jan. 2000
March 2000
(1st batch 10^4 June 00)
Volume production of F-End Boards
Jan. 2000
(150 boards available from previous supplier (20.000 ch))
(tender 4/00) (preserie Sept.00)
fabrizio 15/5/2000
March 2000
Nov. 99
Assembly tools:
Precision table for SL (plan.better 50 )
XY plotter (better than 50 )
Glue dispenser
CCD camera (better than 20 )
I-Beams holder (better 100 )
Wiring machine
Handling tools
Ancillary tables for completion,electr.inst.,test
Table for ch. Assembly
fabrizio 15/5/2000
y
CCD Camera
Glue dispenser
A
B
MB2
MB1
In the tables for MB1 & 2 the
A & B charriots are mech .coupled,
for MB3 & 4 the coupl. is electric
as in the big milling machines.
Two different arrangement are used
in To and Pd for the MB4 ch.s: the
bridge of the X,Y plotter has different
Orientations.
Wires are along Z (PHI tables)
z
Padova
Strip deposition
plates saw:
(22 types of
plate)
MB3 & MB4
Torino
Torino uses the same design for the three tables :
the two for plates cutting and strips deposition
and the one for MB4 assembly
fabrizio 15/5/2000
The I-beams tools for MB1 &2
become two heavy scaling to MB4.
They are also different.
BRICKS STATUS:
ITEM
Mass prod.
Preprod.
First batch
Drift Chambers
H-Comb
I-Beams
I-Beams assembly in Protvino
Al Plates
Al Plates assembly in Dubna
HV Boards assembly in IHEP
F-Ends
F-End boards
Minicrates
RPC
tendering (Jan.2000) ordered(av.June)
Nov.00
tendering (closing)
done
area in preparation progress(Bo)
tendering (Jan.2000) available
area in preparation mar/april (Jun/Jul-To)
started
done
in order
done
Jun.00
tender in prep. (4/00)
ordered
RPC
Bakelite plates
Double gaps production
F-End VLSI
fabrizio 15/5/2000
tendering (Jan.00)
400 tested
tendering (Jan.00)
march 2000 (ESR pending) done/tested
Nov. 99
PLAN/STATUS OF I-BEAMS PRODUCTION (10/4/00)
status
where
PHI
THETA MB3 THETA MB2 THETA MB1
ready
reday
ready
10/4/00
15/6/00
CIEMAT
944
458
Legnaro
1000
300
Bologna
500
Bologna
600
Bologna
1000
600
650
530
TOTAL
3444
900
1108
530
(~6000 beams produced in Bologna,tested in dry air,4.6 KV,< 1% rejection)
26/6/00 SHIPMENT of the first I-Beam assembly table&tools to Protvino
Nov. 00
Nov. 00
Jan. 01
Jan. 01
Protvino
Bologna
Bologna
TOTAL
8000
1000
650
2600
600
500
~ 11.350 in Bo. + 8.000 in Protvino
SHIPMENT to Protvino of the second table and tools,
end of production in Bologna.
fabrizio 15/5/2000
The two basic bricks are the ALUMINIUM PLATES and the I-BEAMS
Both hold FIELD SHAPING ELECTRODES made of Al 50  tape
insulated with Mylar 100.
The ribbons are deposited /inserted on the plates/beams in specialized labs,
from which plates and beams are shipped to the assembly sites
The expected production capability is 4000 beams and 100 plates in 10 days
The need at the nominal overall Super Layer production rate of 10 SL in 10 days
is of 2600 beams and 50 plates
fabrizio 15/5/2000
The performance of the drift tube is largely insensitive to the
positioning of the field shaping strips and of the I-Beams on
the plates, and on the position of the wires along the CMS R
A tolerance of + - 500 micron was measured to be fully acceptable
More demanding are:
A) the wire pitch and staggering in PHI
( for trigger purposes)
B) the distance between the strip and Mylar
along the border sides (for insulation )
C) the distance between the strip and Mylar
borders at the end of the electrodes (for insul.)
fabrizio 15/5/2000
_ .1 mm
42 +
_ .2 mm
3.5+
_ .2 mm
5 +
A), B) and C) were shown to be under control during the prototype
construction.
A) wire position : the design of the End plug in two parts makes the
position of the wire independent of the the I-Beam position.
The crimping block holding the wire sits in the part of the plug
that self centers respect to two small plastic guiding pieces
precisely glued on the plates in front of the I-Beams ends.
B) for strips on the plates : Mylar and Aluminiun strips are put down
in the same pass by the same machine,an on-board CCD camera
check the borders during the deposition
for the strips in the I-Beams: the very precise guidance of the
deep I-Beam groove is exploited to ensure the ultimate
precision in the strip insertion
C) The Aluminium strips are cut with reference to the Aluminium plate
or Beam end border (relative floating positioning)
fabrizio 15/5/2000
Barrel Mu chambers construction
and CMS general schedule
A) crew 1,2,3
B) crew 4 (+1,2,3)
C) crew 4 (+physists)
D) crew 1,2,3
9 days (glue and wire 3 SL, on tables 1,2,3)
9 days (close&cable 3 SL)
in the shadow of A)
9 days (test 3 SL)
in the shadow of A)
3 days (glue 3 SLs , table 4)
in the shadow of A)
one crew
2 workers + 1 supervisor
time for a chamber
9 days (with 4 tables)
useful working days
176/year
(total 9 to 12 persons for 4 tables)
> holidays : Easter,Aug.,Christmas
> refurb.,repair etc : 1 day out of 5
12 ~ 14 chambers/wheel must be installed in the UX
sector 1 and 7
sector 2 and 6
(Assume 12)
2 MB1 (Aa) 2 MB2 (Ma) 2 MB3 (Pd) 2 MB4 (To,Pd)
2 MB3 (Pd) 2 MB4 (To,Pd)
Install in Sx ch. produced 3 months before the dead line
fabrizio 15/5/2000
1
Construction and Installation schedules
draft schedules are based on reasonable assumptions
BUT :
- the definition of “good” SL
- the yield of “good” SLs
- the time & efficiency for testing and repair “no good” SLs
- the long term reliability and duty cycle of complicated tools
- the problems of organization and management of a worldwide
spread production of critical parts
- the real need and availability of manpower
will be known only in one year from now , in spring 2001
fabrizio 28/3/00
draft
CONSTRUCTION
draft
A) Time for the full lot of chambers
Aachen
Madrid
Padova
Torino
70
70
80
30
* 9 (w. d./Ch.)
* 9
* 9
* 20
/176
/176
/176
/176
=
=
=
=
3.6 years
3.6 years
4.1 years
3.4 (+.5) y.
(mid 04)
(mid 04)
(beg. 05)
(beg. 05)
B) Time for prod. of chambers to be installed in SX
last installation window in SX : April 2004 after 3 years of prod.
in 3 years : Aa 59 ch. , Ma 59 ch. , Pd 59 ch. , To 22 chambers
Chamb./wheel to be installed in SX : 38 out of 50 (12~14 MUST be in UX)
38 => 10 MB1 (Aa) + 10 MB2 (Ma) + 8 MB3 (Pd) + 10 MB4
10 MB4 = 2 MB1 (feet,Aa) + 2MB2 (bottom,Ma) + 2 MB3 (top,Pd) + 4 MB4 (To)
THE
Aachen
Madrid
Padova
Torino
ch./wheel (5 wheels) Jan.04(Apr. 04) missing
12 (60)
59/60
1
12 (60)
59/60
1
10 (50)
59/50
1
4 (20)
22/20
0
fabrizio 15/5/2000
(-for full lot)
(11 MB1)
(11 MB2)
(11 MB3,10 MB4)
( 8 MB4)
draft
INSTALLATION
draft
Chambers are installed in a wheel when the 38 DT and RPC of that
wheel are available:
constructed+shipped to ISR+tested+measured(Alignm.)+moved to P5
time for installation in a wheel:
- services (gas/cooling/cables/balcony electronics) are ready
- trigger and R-out electronics sitting on the chambers is installed
- installation is : DT/RPC coupling, insertion, test of all connections
(photogrammetry not included ,MAB cabling partially)
time for install.of 38 ch. in SX
=>
1 Month (half a day/chamber)
constraints: availability of electronics / DT <=> RPC schedule
fabrizio 15/5/2000
Active electronics placement in a BMU Station
RPC
DRIFT TUBE CHAMBER
MAB
Front ends
Readout/Trigger/Control
MAB
Minicrate
fabrizio 15/5/2000
3) electronics:
electronics is sitting on the chambers
in each chamber of one CMS sector :
in the gas volume : F-End chips/boards & HV boards
32 F-End chips (2 Boards) feed:
in the Minicrates :
1 ROB (Read Out Board) 128 ch.
4 TDC (any of them can act as Master)
=> precise coordinates
1 TRB (Trigger Board) 128 ch
32 BTI,4 TRACO,1 TSServer
=>2 best MU in the Board
ONE TS Board
houses the TSMaster
(two parts,any can act as master)
=> 2 best MU in the chamber
in the 4th station
fabrizio 15/5/2000
Sector collector board
to the counting room
A=Amperes
W=Watts
DT POWER REQUIREMENTS:
ONE CHAMBER
ch. type (#) [sector]
MB1
MB2
MB3
MB4
MB4
MB4
MB4
MB4
MB4
MB4
(60) [all]
(60) [all]
(60) [all]
(30) [1,2,3,5,6,7]
(10) [8,12]
(10) [9,11]
(5) [4left]
(5) [4right]
(5) [10left]
(5) [10right]
minicrates
f-ends
3.3 V
A
W
2.5V
A
W
A
W
A
W
26
29
34
34
34
20
26
29
25
25
1
1
1
1
1
1
1
1
1
1
5
5
5
5
5
5
5
5
5
5
4
4
5
5
4
2
4
4
3
3
10
10
13
13
10
5
10
10
8
8
2
2
2
2
2
1
2
2
1
1
10
10
10
10
10
5
10
10
5
5
111
121
140
140
137
81
111
121
101
101
5160 60
5760 60
6720 60
6880 110
300
300
300
350
240
240
300
280
600
600
780
720
120
120
120
120
600
600
600
600
6660
7260
8400
8550
7425 24520 290
1250
1060
2700
480
2400
86
96
112
112
112
66
86
96
83
83
5V
total (F-End)
5V
W
(20)
(20)
(23)
(23)
(20)
(10)
(20)
(20)
(13)
(13)
ALL CHAMBERS :
MB1
MB2
MB3
MB4
TOTAL
TOTAL
TOTAL
TOTAL
GRAND TOTAL
fabrizio 15/5/2000
1560
1740
2040
2085
31 KW
This scheme is elegant and cheap but
constrains together Electronics and
Chambers Production:
a)
HV Boards and Fend should be available
at the time the SUPERLAYER is built
to check and commission it before the
three Slayers of a CHAMBER are glued
together
b)
Rout and Trigger Boards sit in minicrates
inserted in the Hcomb before the chamber
is installed
fabrizio 15/5/2000
a) the first final protos of Fends will be
available by end Nov.99
2000 chips for first ch.will be available
Dec.99 (on loan from COMPASS exp.)
OK
OK
tender for CMS mass prod.is at the latest days
begin of mass prod.expected in spring 2000
OK
fabrizio 15/5/2000
-
b)
-the first ROB should be ready in spring 2001 and first minicrates in September
2001
-we must allow for 6 months contingency in case s.t. goes wrong (orange dates)
-we need six month burn-in of electronics
in the minicrates (at ambient temperature ,now with standard procedures)
-chambers will be installed EQUIPPED with full electronics
chip status : (prod.=tender)
prod . 6/2000 *
(1/2001)
BTI mod. ready prod. 9/2000 *
TRACO under test
(1/2001)
TSS,TSM
planned 1/2001
TRB
planned 3/2001
TDC
prod. end 2000
ROB
planned 3/2001
minicrates
planned 9/2001
(3/2001)
(6/2001)
(id.)
(9/2001)
(6/2001)
(9/2001)
(3/2002)
BTI
ready
yield below 50%
lay out problems : 2 submiss.jun/jul 00
expected date for availability
* common Tender at end 2000 :Market S. June
fabrizio 15/5/2000
problems with $/CHF
draft
INSTALLATION
draft
Installation demands the presence of technicians & physicists
to avoid spoiling the labs :
=> install all the ch. of a Wheel in one go
=> install ch. equipped with R-Out & Trigger electronics
=> choose a sequence that minimizes the impact of possible
construction delays
=> tune the construction sequence accordingly (RPC included)
YB0
mid 02 *
YB+1 beg. 03
YB-1
end 03
YB+-2 in the last window in 04
( YB+-2 are the most easy to handle in SX )
=> install in UX
* a earlier installation in YB0 without electronics may also be considered
fabrizio 15/5/2000
CURRENT CMS MASTER PLAN UP TO APRIL 2004
Modified 5/4/00
vers. 28
Windows for MU ch. Installation in SX (CMS SC march 20/00,under discussion)
2000
2001
2002
2003
2004
YB-2
YB-1
YB-0
YB+1
DT+RPC
INSTALL.
YB+2
YE-1,-2,-3
YE+1,+2,+3
Installation procedures/tools/times…..must be understood and agreed
fabrizio 20/3/00
In green the wheels assembly windows (for supporting rails)
CURRENT CMS MASTER PLAN UP TO MARCH 2004
vers. 28
Windows for MU ch. Installation in UX (to be confirmed)
2004
YB-2
YB-1
YB-0
YB+1
YB+2
YE-1,-2,-3
YE+1,+2,+3
fabrizio 20/3/00
2005