CMS MU IB chairs D.Reeder ( M.Cerrada ) P.Managers F.Gasparini G.Mitselmakher I.B. Chairs D.Reeder...
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Transcript of CMS MU IB chairs D.Reeder ( M.Cerrada ) P.Managers F.Gasparini G.Mitselmakher I.B. Chairs D.Reeder...
CMS MU
IB chairs D.Reeder ( M.Cerrada )
P.Managers F.Gasparini G.MitselmakherI.B. Chairs D.Reeder M.CerradaR.Manager C.PeroniTech. Coords H.Reithler R.Loveless Task Coords. 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)
Institution Board
Technical Board (Steer.Comm.)
BARREL ENDCAPS
Project leader F.Gasparini
Tech.Coord. H.Reithler SPO
U.Dosselli Planning H.Reithler Safety S.Maselli QA&QC D.Dattola Integration G.Bencze Alignment G.Iaselli RPC
Technical Board
Tech.coordin. H.ReithlerDT chambers U.DosselliDT electronics C.WillmottRPC G.IaselliRPC electronics A.RanieriAlignment T.Rodrigo, G.BenczeTRIDAS link G.WrochnaSoftware U.GaspariniIntegration (detect.) D.Dattola (services) H.Reithler
Resource ManagerC.Peroni Finance Board M.Cerrada Spain D.Rein Germ. G.Zumerle Italy R.Loveless US V.Karjavin RDMSBARREL
muon
Drift Tubes CommitteeH.Reithler M.CerradaC.Peroni A.RossiU.Dosselli G.ZumerleC.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
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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)
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BARREL MU INSTITUTES & LABORATORIES
Aachen RWTH III A drift chambersBari Univ.-INFN RPCBeijing IHEP drift chambersBologna Univ.-INFN drift chambersCERN Mic - CMT drift chambers alignmentCIEMAT drift chambers alignmentDebrecen K.L.Univ. alignmentIslamabad Opt.Lab. alignmentPadova Univ.-INFN drift chambersPavia Univ.-INFN RPCPeking Univ. RPCSantander IFCA-Univ. alignmentSofia INRNE RPCSofia Univ. RPCTorino Univ.-INFN drift chambersWarsaw SoltanINS RPCWien HEPHI alignment
TECHNICAL COLLABORATIONS
Protvino IHEP drift chambersDubna JINR drift chambers
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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
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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
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DT Chambers Production sharing
AachenMadrid
TorinoPadova
Chambers that can’t be installed in SX
1
4
2
35
6
7
8
910
11
12
HV& decoupl. Boards
F-End
R-Out & Trigger
Honeycomb & integrated C-Beams
Minicrates
I-Beamsplates
beam line Pads for RPC suspension
RPC and DT are inserted in the yokes as a unique body (constraint in prod. & install. Schedules)
250cm27cm
200 ~ 400cm
THE DT CHAMBERS (Z view)
MB1
MB4
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HV& decoupl. Boards
F-End
I-Beamsplates
Pads for RPC suspension
250cm27cm200 ~ 400 cm
Alignment LEDs/holders
Suspension “scale”
Suspension railsscrewed to the yoke
THE DT CHAMBERS (X,Y VIEW)
MB1 2 3 MB4
fabrizio 15/5/2000
Honeycomb & integrated C-Beams
the position of the s equipotential depends on the cell geometry (i.e. on the strip width and on the wire radius)
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
continuous lines represent electrodes dotted lines represent equipotential surfaces
SgC
Ws
fabrizio 28/3/00
the presence of the grounded Al plates and beams between S and C makes the positionof the g equipotential quite independent of the Voltages of s and c
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
a b
b/a ~ .65
For practical and safety reasons many components are inside the gas volume of the chamber
An intensive campaign of measurements to identifypossible aging effects from these materials was organized and done ( and will continue,for safetyreasons,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 afterneutron 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:
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.
Pieces of I-Beams and Al .Plates to check forpossible 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 LHCF-End 300 hits in 10 y of LHC
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
In magnetic field
prototypes of LV supply up to 1 T POSITIVE
With High energy neutrons (>20 MeV)
Electronics and supplies will be tested againsteffects of neutrons up tp 70 MeV in the facilityof 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/secThe first is ideal to test complete boards ,the second will be used to verify critical components
The first run ,with the broad beam,is planned by the end of June 00.
fabrizio 15/5/2000
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 1987/98for 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
8
The smallest independent unit is the Super Layerchambers 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
9
76
5 4
32
1
2 Workers + 1 Supervisor
glue
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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
~ 2MB1, 7 MB2, 5 MB3
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Plans and status
assembly site # of tables type of chamber (#) ready in production
Aachen 3 MB1 (70) June 2000 Sept. 2000
Legnaro 3 MB3 (70) MB4 (10) 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) Dec. 1999
Volume production of F-Ends Jan. 2000 March 2000 (1st batch 10^4 June 00)Volume production of F-End Boards Jan. 2000 March 2000(150 boards available from previous supplier (20.000 ch)) (tender 4/00) (preserie Sept.00)
fabrizio 15/5/2000Nov. 99
Assembly tools:
Precision table for SL (plan.better 50 )XY plotter (better than 50 )Glue dispenserCCD camera (better than 20 )I-Beams holder (better 100 )Wiring machineHandling toolsAncillary tables for completion,electr.inst.,testTable for ch. Assembly
fabrizio 15/5/2000
y
z
B
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 usedin To and Pd for the MB4 ch.s: thebridge of the X,Y plotter has different Orientations.
Torino uses the same design for the three tables :the two for plates cutting and strips depositionand the one for MB4 assembly
MB1 MB2
MB3 & MB4
Padova
Torino
The I-beams tools for MB1 &2become two heavy scaling to MB4.They are also different.
CCD CameraGlue dispenser
A
Wires are along Z (PHI tables)
Strip deposition
fabrizio 15/5/2000
plates saw:(22 types ofplate)
BRICKS STATUS:
ITEM Mass prod. Preprod. First batch
Drift Chambers
H-Comb tendering (Jan.2000) ordered(av.June) Nov.00I-Beams tendering (closing) doneI-Beams assembly in Protvino area in preparation progress(Bo)Al Plates tendering (Jan.2000) available Al Plates assembly in Dubna area in preparation mar/april (Jun/Jul-To) HV Boards assembly in IHEP started doneF-Ends in order done Jun.00F-End boards tender in prep. (4/00)
Minicrates ordered
RPC
Bakelite plates tendering (Jan.00) 400 tested
Double gaps production tendering (Jan.00)
F-End VLSI march 2000 (ESR pending) done/tested
fabrizio 15/5/2000 Nov. 99
RPC
PHI THETA MB3 THETA MB2 THETA MB1
ready CIEMAT 944 458 reday Legnaro 1000 300 ready Bologna 500 10/4/00 Bologna 600 15/6/00 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 Protvino 8000 Nov. 00 Bologna 1000 650 Jan. 01 Bologna 2600 600 500 TOTAL ~ 11.350 in Bo. + 8.000 in Protvino
Jan. 01 SHIPMENT to Protvino of the second table and tools, end of production in Bologna.
PLAN/STATUS OF I-BEAMS PRODUCTION (10/4/00)
status where
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 tapeinsulated 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
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The performance of the drift tube is largely insensitive to the positioning of the field shaping strips and of the I-Beams onthe 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 42 + .1 mm ( for trigger purposes)
B) the distance between the strip and Mylar along the border sides (for insulation ) 3 . 5 + .2 mm
C) the distance between the strip and Mylar borders at the end of the electrodes (for insul.) 5 + .2 mm
_
_
_
fabrizio 15/5/2000
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 9 days (glue and wire 3 SL, on tables 1,2,3) B) crew 4 (+1,2,3) 9 days (close&cable 3 SL) in the shadow of A) C) crew 4 (+physists) 9 days (test 3 SL) in the shadow of A) D) crew 1,2,3 3 days (glue 3 SLs , table 4) in the shadow of A)
one crew 2 workers + 1 supervisor (total 9 to 12 persons for 4 tables) time for a chamber 9 days (with 4 tables) useful working days 176/year > holidays : Easter,Aug.,Christmas > refurb.,repair etc : 1 day out of 5
12 ~ 14 chambers/wheel must be installed in the UX (Assume 12)
sector 1 and 7 2 MB1 (Aa) 2 MB2 (Ma) 2 MB3 (Pd) 2 MB4 (To,Pd) sector 2 and 6 2 MB3 (Pd) 2 MB4 (To,Pd)
Install in Sx ch. produced 3 months before the dead line
1
fabrizio 15/5/2000
Construction and Installation schedules
draft schedules are based on reasonable assumptionsBUT :
- 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
A) Time for the full lot of chambers
Aachen 70 * 9 (w. d./Ch.) /176 = 3.6 years (mid 04)Madrid 70 * 9 /176 = 3.6 years (mid 04)Padova 80 * 9 /176 = 4.1 years (beg. 05)Torino 30 * 20 /176 = 3.4 (+.5) y. (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) THE 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)
ch./wheel (5 wheels) Jan.04(Apr. 04) missing (-for full lot) Aachen 12 (60) 59/60 1 (11 MB1)Madrid 12 (60) 59/60 1 (11 MB2)Padova 10 (50) 59/50 1 (11 MB3,10 MB4)Torino 4 (20) 22/20 0 ( 8 MB4)
draft CONSTRUCTION draft
fabrizio 15/5/2000
draft INSTALLATION draftChambers are installed in a wheel when the 38 DT and RPC of thatwheel 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
Front endsReadout/Trigger/Control
Minicrate
DRIFT TUBE CHAMBER
Active electronics placement in a BMU Station
MAB
MAB
RPC
fabrizio 15/5/2000
1 ROB (Read Out Board) 128 ch. 1 TRB (Trigger Board) 128 ch 4 TDC (any of them can act as Master) 32 BTI,4 TRACO,1 TSServer => precise coordinates =>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
Sector collector board
to the counting room
in the 4th station
in the Minicrates :
in each chamber of one CMS sector :
3) electronics: electronics is sitting on the chambers
in the gas volume : F-End chips/boards & HV boards 32 F-End chips (2 Boards) feed:
fabrizio 15/5/2000
DT POWER REQUIREMENTS:ONE CHAMBERch. type (#) [sector] minicrates f-ends total (F-End) 3.3 V 5V 2.5V 5V A W A W A W A W W
MB1 (60) [all] 26 86 1 5 4 10 2 10 111 (20) MB2 (60) [all] 29 96 1 5 4 10 2 10 121 (20) MB3 (60) [all] 34 112 1 5 5 13 2 10 140 (23) MB4 (30) [1,2,3,5,6,7] 34 112 1 5 5 13 2 10 140 (23) MB4 (10) [8,12] 34 112 1 5 4 10 2 10 137 (20) MB4 (10) [9,11] 20 66 1 5 2 5 1 5 81 (10) MB4 (5) [4left] 26 86 1 5 4 10 2 10 111 (20) MB4 (5) [4right] 29 96 1 5 4 10 2 10 121 (20) MB4 (5) [10left] 25 83 1 5 3 8 1 5 101 (13) MB4 (5) [10right] 25 83 1 5 3 8 1 5 101 (13)
ALL CHAMBERS :
MB1 TOTAL 1560 5160 60 300 240 600 120 600 6660 MB2 TOTAL 1740 5760 60 300 240 600 120 600 7260 MB3 TOTAL 2040 6720 60 300 300 780 120 600 8400 MB4 TOTAL 2085 6880 110 350 280 720 120 600 8550
GRAND TOTAL 7425 24520 290 1250 1060 2700 480 2400 31 KW
A=AmperesW=Watts
fabrizio 15/5/2000
This scheme is elegant and cheap but constrains together Electronics and Chambers Production:a)HV Boards and Fend should be availableat the time the SUPERLAYER is builtto check and commission it before the three Slayers of a CHAMBER are gluedtogetherb)Rout and Trigger Boards sit in minicratesinserted in the Hcomb before the chamberis installed
fabrizio 15/5/2000
a) the first final protos of Fends will be available by end Nov.99 OK
2000 chips for first ch.will be available OK Dec.99 (on loan from COMPASS exp.)
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)
BTI ready prod . 6/2000 * (1/2001)
BTI mod. ready prod. 9/2000 * (3/2001) yield below 50%
TRACO under test (1/2001) (6/2001) lay out problems : 2 submiss.jun/jul 00
TSS,TSM planned 1/2001 (id.)TRB planned 3/2001 (9/2001)TDC prod. end 2000 (6/2001)ROB planned 3/2001 (9/2001)minicrates planned 9/2001 (3/2002) expected date for availability
* common Tender at end 2000 :Market S. June problems with $/CHFfabrizio 15/5/2000
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)
=> install in UX 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 )
* a earlier installation in YB0 without electronics may also be considered
fabrizio 15/5/2000
CURRENT CMS MASTER PLAN UP TO APRIL 2004 vers. 28
YB-2
YB-1
YB-0
YB+1
YB+2
YE-1,-2,-3
YE+1,+2,+3
2001 2002 2003 2004
Windows for MU ch. Installation in SX (CMS SC march 20/00,under discussion)
fabrizio 20/3/00
Modified 5/4/00
2000
In green the wheels assembly windows (for supporting rails)
Installation procedures/tools/times…..must be understood and agreed
DT+RPCINSTALL.
CURRENT CMS MASTER PLAN UP TO MARCH 2004 vers. 28
YB-2
YB-1
YB-0
YB+1
YB+2
YE-1,-2,-3
YE+1,+2,+3
Windows for MU ch. Installation in UX (to be confirmed)
2004 2005
fabrizio 20/3/00