1 CSN 1 INFN LECCE 2003 BARREL MU: DT status Installation plan Minicrate test f.gasparini

2 SUMMARY & CONCLUSIONS SL and Chamber assembly on schedule Installation plan compatible with DT,RPC,MB1 supports and wheel availabilty HV cable manufacturing started Agreement for cable radial cable trays/DT cables defined Good results from MINICRATE test of May Minicrate production: small delay but still compatible with installation plan NEW LINK Alignment news

3 THE BARREL MU DRIFTCHAMBERS 4 concentric stations 60 chambers each (MB4 70 ch.s) 680 SLs (MB1,2,3: 3 SL each,MB4 2 SL) wires Four assembly sites Aachen 60 MB MB1/4 CIEMAT 60 MB MB2/4 LNL 60 MB MB3/4 Torino 40 MB4 (with two tables) LHCC Comprehensive Review 10/2/01 CMS MUONS: Drift Tubes and Alignment fabrizio

4 The Installation Task The Barrel Muon system comprises 250 chambers in 7 flavors: 60 MB1 3SL 2 RPC ~2.0 x 2.54 m 2 960kg 60 MB2 3SL 2 RPC ~2.5 x 2.54 m kg 60 MB3 3SL 1 RPC ~3.0 x 2.54 m kg 40 MB4 2SL 1 RPC ~4.2 x 2.54 m kg 10 MB1 2SL 1 RPC 10 MB2 2SL 1 RPC 10 MB3 2SL 1 RPC 10 Sectors will be installed in SX5 => 210 Chambers(310 RPCs). Sectors 1 and 7 are used for the lowering fixture and will be installed in UX5 => 40 Chambers(60 RPCs).  SL  SL Honeycomb Brown MB4 (Torino) Have two Superlayers only

5 Plateau knee Drift cell effic.&resolution With increasing Background Hit rate 3.5 larger that the worst case In LHC TYPICAL CHAMBER PERFORMANCE: CMS Note 2003/007

6 Produzione camere: Quality Control In tutti i 3 siti in produzione (A,M,Pd-LNL): Misure di posizione dei fili Misure di tensione dei fili Misure di planarità (alveare e camera) Controllo di tenuta pressione Controllo rumore elettronica Test con raggi cosmici Dati immagazzinati in area web-DB

7 Madrid: Position & Tensione Fili  SL at table 1  Layer 1  Layer 2  Layer 3  Layer 4 Mean=6.4  m  = 46.0  m Mean=-0.4   = 38.2  m Mean=2.93 N  = 0.10 N

8 PD-LNL Summario posizione fili 1entriata=1 Layer THETA r.m.s. residui HV FE <>=38  m <>=35  m Summario tensione fili 1entriata=1filo <>=2.9N rms=0.1 N

9 Aachen:

10 Batch 1 Batch 2 Batch 3 Batch 4 Batch 5 Honeycomb and Chambers planarity PD-LNL

11 Aachen: test cosmici

12 Chamber Efficiency PD-LNL: eff. con cosmici

13 CHAMBER: Top (summary) SuperLayer Layer Analysis Pd-LNL area stoccaggio dati

14 Parts needed to assemble end test one SL: 1) Aluminium plates with field elecrodes 2) Aluminium beams with cathode electrodes 3) Hcomb Panels (that house services) 4) HV Boards in the gas volume 5) Amplifiers on boards in the gas volume 1) 3400 plates (2040 double sided,1360 single s.) electrodes. Mass prod. in Dubna. Tools designed and commissioned by INFN Torino (330 plates prepared in To) ON SCHEDULE 2) I-beams = cathodes mass prod. in IHEP Protvino. Tools designed and commissioned by INFN Bo ( beams assembled in Bo) ON SCHEDULE 3) produced by Hexcel 4) boards assembled in IHEP Beijing tools and jigs from INFN Padova (delay,not critical*) 5)boards and chips by INFN Padova * Delay generated by a delay in PCB availabil. LHCC Comprehensive Review 10/2/01 CMS MUONS: Drift Tubes and Alignment fabrizio C-beams H-Comb firm I-Beams firm Protvino Tools Bologna Tools Torino Al. Plates firm Dubna Aachen HVB,HVC HV Cables CIEMAT CERN Crimping blocks LNL Wires corner blocks Torino Gas covers profiles end plugs FE-boards IHEP Beijing Padova CIEMAT Aachen

15 LHCC Comprehensive Review 10/2/01 CMS MUONS: Drift Tubes and Alignment fabrizio 2897 plates cut in Torino 2139 plates produced in JINR under Torino coordination Bad channels < 1‰ Strip Production in JINR-Dubna

16 120

/1/20011/1/20021/1/20031/1/2004 Date Total Superlayers produced Aachen Madrid Legnaro 22 ch/y 18 ch/y nominal Some man power problem in Legnaro in Apr/June ( announced)

18 Chambers OR 3 Fully Tested SuperLayers /1/20011/1/20021/1/20031/1/2004 Date Cambers produced Aachen Madrid Legnaro 32 mama Madrid and Aachen begun to make the small MB4 Chambers with 2 SL only (padova in Nov)

19 LNL 5/9/ SL 32 CH Aachen 15/8 102 SL 34 Madrid 10/9 120 SL 34 CH 100 ch out of 210 Chambers at ISR MB1 20 by dec MB MB Total These figures can imply that all the dressing will be done for all chambers at ISR (to be agreed)

20 INSTALLATION CONSTRAINTS: RPC availablity ( see Iaselli) MB1 supports Torino line Minicrates availability To cope with Minicrates: begin installation in lower parts of the Yokes To easy and speed RPC production, the priority for RPC is RB2>RB3>RB1>RB4 (see Iaselli) First MB4 chambers will be installed in april 04 (sect. 9,10,11 from Aachen,CIEAMT and Legnaro).

21 MB1 supports: To be made in IHEP Beijing, available Jan./Feb because of the late availability of the final drawings. Torino line: The planning was revised in detail in June with Alain. Drawings done in Torino (Mereu,Daudo) and CERN (Mimmo and Boki) Goal : have the first table and related tools and references ready for end of October Bridge supports installed on the two tables by end July : done Bridges commissioning by end August beg. sept.: done Honeycomb plates for I-beam tools available end July done Alcoa plates and side profiles for I Beam tools available Finishing I-beam tool in September going Drawings of ancillary parts to make table and tool operational were planned to be available end of August going

22 Torino line versus v33.2: Surface assembly ch./y (Madrid is running for an year at 22 ch/year)

23 Torino line versus v33.2: underground assembly ch./y (Madrid is running for an year at 22 ch/year) + 2 months

YB+1, YB0 jan,feb YB 0,+1,+2 mar.apr 04 YB –1,-2 in 2005 < 64 ch. Torino MB 4 ~ 24 ch ~ 23 ch ~24 ch YB0 first (may/june) (then +1,+2 In fall 04) ~21 ch 5 to 8 ch/week YB-1 YB-2 2 Mb1 in YB-1 TAKES INTO ACCOUNT DELAY OF MB1SUPPORTS 132 DT/RPC packs installed by end 2004 >42 ch* NOW *+ 4 MB4 sectors 8,9 of YB-1 and –2 that should be completed before the Mag.Test Torino

25 v33.2: Surface assembly YB+2,+1 YB0 YB-1,-2

26 Complete the chambers at ISR: Accept and certificate Measure on the alignment bench Internal gas/cooling pipes HV and DCS cables R-Out cables (theta SL) Covers and protections,

27

28

29 Many types of chambers to be installed in many difficult places with different RPC configurations Many and complicate ancillary tools Are required.

30 to the counting room electronics: DT electronics is sitting on the chambers 1 ROB (Read Out Board) 128 wires 1 TRB (Trigger Board) 128 wires 4 TDC (any of them can act as Master) 32 BTI,4 TRACO,1 TSServer => precise coordinates =>2 best MU in the Board (64 cm) ONE TS Board houses the TSMaster (two parts,any can act as master) => 2 best MU in the chamber Sector collector board in the 4th station (now on the balcony) in the Minicrates : in each chamber of one CMS sector : in the gas volume : F-End chips/boards & HV boards 32 F-End chips (2 Boards) feed: LHCC Comprehensive Review 10/2/01 CMS MUONS: Drift Tubes and Alignment fabrizio RoB TB TSB DCS Front T B T T C T End D T R S o S SECTOR C I A S n M Collector C.Room C t O r

31 MINICRATES: Analysis of data taken in May going on : positive BTI modules fabrication: samples (50) and preserie (400) : positive First batch (~ 1000) started Trigger Boards : all material available for 50 board started (10 ~ 12 Minicrates) CCB and SB : some adjustment after the test September Mechanical parts production of last parts: Started or starting soon (some piece to be modified) Few Mincrates will be assembled in fall 03,starting October In the plot the rate is 10 MC/month. SECTOR Collector and DDU: These are the last missing parts: prototype of DDU exist and the first Unit will be produced in beginning 2004 Sector Collector is fully designed,the input section tested in May test beam,material procurement will start soon in 2004 as planned.

32 MINICRATES versus v33.2: Surface assembly Installed chambers Minicrates (10/month) without minicrates Mag.test UX

33 MINICRATES versus v33.2: underground assembly Inst.chambers Minicrates Mag.test UX (+ 2 months)

34 TRIGGER TEST ON THE 25 nsec BEAM OF MAY Crew from Padova,Bologna,CIEMAT,Torino and Aachen I would like to stress that this is a result of a very preliminary analysis whose aim was to check that the gross features of the trigger are as we expected in order to finalize the design of the last details of the boards. A deeper understanding of the way the “real” trigger works will require some time. ~ 10^ 7 events were collected At different angles and in all the trigger configurations

DT Trigger Performance - Sara Vanini 11

36 DriftTubes Local-Trigger

37 Each Trigger has quality bits telling the type of trigger: The BTI generates a Trigger if 3 or 4 “aligned” are found in its Superlayer : they are named L or H respectively. BTIs look each to 3 adjacent cells, with a pitch of one cell. TRACO correlates the signals from the BTIs of the two SL (same time and within the geometrical acceptance) TRACOs overlap too TSS+TSM select among all TRACOs the two best tracks,rejecting Duplicates,ghosts and fakes. There are several settings of the Trigger : default (CMS Standard) Backup, etc ….in order to recover possible failure in TSM or CCB reduce the “noise” etc….Data shown below are from some runs in the Default mode.(standard CMS mode).

38 Radial angle (= position) Bending angle ( in test beam= inclination fixed depends on run) The Trigger needs at least 3 aligned hits in a SL identifies the time of passage of one track (Bunch crossing identification) makes and sends out a measurement of the radial (= position) and bending angle. Resolution is < 1mm and from 5 to 15 mrad resp. depending on the Trigger type (Correlated/uncorrelated) SL inner SLouter Correlated trigger (Slo & Sli) Uncorrelated (Slo or Sli)

39 * * * * * * * * * * * * * * * * * * * * * H H L H HL (LH) H N Ho * * * * * * H N Hi BTI outer BTI inner HH TRACO TSS/TSM * * *

40 * * * * b * * * * a a BTI Shift registers a +b = T Good track H trigger Ghost track out of time a+b = T L type (3 hits) / Chamber SuperLayer

41 TRACO can find HH four “aligned” hits in the two PHI SL HL (LH) 4 and 3 (3 and 4) hits in the two PHI SL LL 3 and 3 In case TRACOs do not find a correlation, single SL Trigger are transmitted Ho or Hi (H trigger from outer or inner SL) Lo or Li (L trigger ……..) TSS and TSM look to TRACO outputs etc……….

Trigger Output Clock triggers vs pattern unit slot clock 14 is the right one triggers in other location are "ghosts" or false triggers DT Trigger Performance - Sara Vanini 13

43 The right crossing is in the 14th clock. Ghost triggers,found by BTIs looking for aligned hits in the shift registers are strongly suppressed by the correlation request in HH and HL But they are still present in LL, and obviously in the single SL triggers. Mechanism exist to suppress the ghosts in the LL,Lo and Li trigger.The data shown are in the “default configuration”. Analysis is going on. Ronchese,Vanini,Zotto

BX Efficiency vs Incident Angle - 1 ~ % efficiency up to 35 0 tracks hitting 2 I-beams # ev.trig. at 14bx efficiency = total # of events Event= scintillator + 2 hits in beam region DT Trigger Performance - Sara Vanini 14 “EMULATOR” is a SW package that emulates the full chain of the Trigger Chips and Boards. It works off line and need as input the times recorded by the TDCs. “Emulator “ is not the CMS simulation,it should reproduce exactly the Trigger data. To compare with the expected performance as shown in the Trigger TDR we should compare with the full track reconstruction from TDC data. However this first result is in excellent agreement with what we expect.

BX Efficiency -2 HH HL LL Ho Hi Lo Li drop of correlated efficiency at large angles due to geometrical cuts (single BTI 56 o traco 42 o ) DT Trigger Performance - Sara Vanini 15

BX Efficiency - 3 HH HL Ho Hi DT Trigger Performance - Sara Vanini 16

47.31 BTI n BTI n+1 BTIs overlap B (TESLA) longitudinal component B (TESLA) radial component H-trig = 4/4 layers L-trig = 3/4 layers BWBW Bn.19 BTI test in Magnetic Field (test beam 2000, CMS note 2001/051) Prob. of one/4 layers affected by delta 16%, more than one 4%

Fit vs Trigger Comparison DT Trigger Performance - Sara Vanini 22 Ho HH… Hi

Fit vs Trigger comparison emulation shows the same behaviour ! corr inner outer DT Trigger Performance - Sara Vanini 20 gap among the triggers broken lines: border between traco 9 and 10

Fit vs Trigger Comparison correlated emulation with correct LUTs shows the right correlation DT Trigger Performance - Sara Vanini 21

Fit vs Trigger comparison - 6 extrapolation at 0 o DT Trigger Performance - Sara Vanini 24

Fit vs Trigger comparison - 7 extrapolation at 20 o DT Trigger Performance - Sara Vanini 25

Fit vs Trigger comparison - 8 extrapolation at -20 o DT Trigger Performance - Sara Vanini 26

54 Detailed cross check with the TDC data are going on,and will take some time. The comparison is done selecting very good tracks and looking in the trigger data How many times there is at least one trigger signal in the right crossing (the 14 th clock) Perpendicular tracks 4 and only 4 aligned hits in the interested cells of SL 1 and 2 (~ events) HH 97.0 % HL 1.7 % Ho,Hi.9 % LL,Lo,Li.1 % No trigger.3% Total % 0 degrees M.C.Fouz The table below give the efficiency of thr trigger for different hit configuration Single hit per cell: or n or n+4 Global effic Including cells with more than one hit per cell Global effic, M.C.Fouz 0 degrees

55 CONCLUSIONS The test was very useful and validated the trigger electronics. The large statistics cumulated allows a detailed study of the trigger Performance. No bad surprise so far. An error was identified in the test pulser control,and corrected in the CCB/SB Boards. It was found that some detail of the MC mechanics had to be improved. The first five final CCB are under assembly and available at end September. Mechanics is in production. Read out part of the MC will be assembled in CIEMAT and ship to Padova for the Trigger part and full test. The final test stand for mass testing is in preparation in Padova with participation of Padova and Bologna people.