RPC Endcap Maintenance and RE4 Upscope

Anton Dimitrovon behalf of RPC TC

CMS Week Dec 2012CERN, Geneva

LS1 List of intervention in RE

List of all RPC LS1 interventions is available in DocDB:

https://cms-docdb.cern.ch/cgi-bin/DocDB/ShowDocument?docid=5439

For each intervention you can find there the priorities, the infrastructure and manpower needed and the impact on other sub-detectors

RPC LS1 list is regularly updated after every TS 2

LS1 List of interventions: RE+RE+1: Total access time requested 31 days.

5 days are available in the period 31.Jul.2013 – 06.aug.2013. YE+1 is accessible for much longer period. In agreement with CSC colleagues we have defined a parallel working schema during LS1.

4 days to change/commission 4 HV connectors, 15 days for change 5 LV DB or FEB (CSC removal ) 12 days for repair 5 cooling by-pass (CSC removal, one of them has LV Threshold problem too)

In order the parallel activities to be successfully carried out enough number of CP with spare charged batteries should be available.

RE+2: Total access time requested 7 days, no interference with other sub-detectors5 working days are available in the period 24.Sep.2013 – 30.Sep.2013 4 days to change/commission 3 HV connectors3 days for search and repair of 3 gas leaking sectors

RE+3: Total access time requested 8 days, no interference with other sub-detectors5 working days are available in the period 2.Oct.2013 – 8.Oct.2013 4 days to change/commission 7 HV connectors1 day for 1 LV Threshold Problem3 days for search and repair 3 gas leaking sectors.

3

LS1 List of interventions: RE-RE-1: Total access time requested 10 days.

5 days are available in the latest LS1 schedule, 26.Nov.2013 – 02.Dec.2013. YE-1 is accessible for much longer period but any other activities are in conflict with ME-1/1 interventions. 4 days to change/commission 9 HV connectors, 3 days for change 1 LV DB or FEB (CSC removal *) 3 days for repair 1 cooling by-pass (CSC removal*)

RE-2: Total access time requested 7 days, no interference with other sub-detectors5 working days are available in the period 12.Feb.2014 – 18.Feb.2014 4 days to change/commission 1 HV connector3 days for search and repair of 3 gas leaking sectors

RE-3: Total access time requested 5 days, no interference with other sub-detectors5 working days are available in the period 04.Feb.2014 – 10.Feb.2014 4 days to change/commission 6HV connectors1 days for search and repair 1 gas leaking sectors.

* To be discussed in detail with CSC colleagues 4

Chamber Components Procurement

• Mechanics & Electronics• Bakelite (HPL)• Gaps• Chamber Cooling System

5

• Mechanics and strips– All production for 200 chambers done and delivered to CERN (175) and

India (25)– Retrofitting needed to cure some mechanical defects (being done now)

Planning : • secured 10 chambers for each assembly site. • one Endcap secured by the end of 2012• all the rest by Feb 2013

Components: Mechanics (China) & Electronics (Pakistan)

6

• Electronics (FEB, DB and AB)– First deliveries of electronics for 40 chambers from Pakistan to CERN in

early 2012. QC validation: OK– Mass production on going.– Completion of production by Feb 2013.

Components: Bakelite/HPL (Italy)

7

Status: 660 panels HPL 3200x1620mm

103 back @CERN from Korea to be re-washed at GT

(problem with Polyurethane deposit solved) 297 @Korea ready for Gap

production 210 QC OK in Puricelli, Pavia,

cut @ Riva Firm, to be washed Last 50 produced Nov 22nd , to

be QC in Puricelli and Pavia this week

The new location @ INFN PAVIA

Automatic Resistivity System located at INFN Pavia

• Re-established the HPL panel production line:• Production at Puricelli• QC at Pavia• Cutting at RIVA• Surface cleaning at GT• Final acceptance at CERN 7

Component: Gaps (Korea)

Gap production for RE4 RPCs at KODEL 1) Required number of QC qualified gaps = 660 gaps (220 sets)

- 432 gaps to assemble 72 RE4-2 (Ring 2) and 72 RE4-3 (Ring 3) RPCs

- 228 gaps to secure additional 56 spare chamber (168 gaps) and contingencies

2) Role of KODEL

- Production of 660 RE4-3 gaps

- QC procedures

Visual inspection for HPLs and gaps

Leak & pop-spacer tests

HV/Dark Current Tests (two HV scans & 120-h test at working HV)

Importing the data in the RPC Construction database

- Shipping to assembly sites

CERN, Switzerland

BARC institute, India

Ghent University, Belgium

8KyongSei Lee

Gap production: first reception and QC @ CERN

49 gaps received to CERN on Nov 2nd

• visual inspection was showing defects on the graphite surface and PET hot melting procedure.

• Air bubbles and bumps (in hot melt PET) and empty spots (in graphite)

• Clearly visible a “learning phase” in the received gaps

• KODEL colleagues defined a more formal QC procedure for these steps in the gap production.

• Most of Bottom type delivered gaps have some problems, but fortunately not on the HV side.

• QC tests (electric, pop up spacers and leaks) being performed at CERN. First results are OK.

21 gaps sent to Ghent site, 28 gaps remained at CERN.

Gaps for Endcap1 ready by May, 2013

Gaps for Endcap2 ready by Sep.2013

Gaps for Spare Chambers ready by Dec.2013

Chamber Assembly Sites

• CERN (RPC lab in bld 904)• University of Ghent (Belgium)• BARC Mumbai (India)

11

Same protocols and QC criteria for the three production sites

Ready to go for chamber production and QC

Site Manager Archana Sharma

CERN 904 Lab

13

QC tools in place

- Cosmic stand can fully operate remotely (via network and authenticated login)- All software is available in the common central CERN repository- All data are under backup in the central CERN (castor) storage

(everyday@midnight)

- All operations are performed via webpages click-by-click- All actions are logged in the e-log system to easily/simply manage

the site- All tools run in background processes, transparent to the user, the

webtool is self-explained click-by-click

Overview

Operations

Data- Raw data are recorded in dedicated files.- Final output is DATABASE compliant.- Data can be viewed via DQM page before the upload into the DB.

Developed by Stefano Colafranceschi

LAST 904 STATUS UPDATE

- Visual QC performed on the first RPC gap batch (49)

- First RPC GAP (12) stack tested (gas, HV)

- Two RPC chamber assembled and tested

14

University of Ghent

15Site Manager Michael Tytgat

Ghent site is ready to test gaps, assemble and test chambers Cosmic test bench is operational Enough manpower available in Ghent to get started First gaps arrived on Nov 26. First gap QC results are present. Chamber assembly started last week. Cosmic muon tests will start next week. Ghent site review planned on Dec. 19-20

All hardware and infrastructures required for the QC is ready : Gap popped spacer and leak test Gap HV/Dark Current tests Cosmic test bench for chambers Strip connectivity test

All software exists and works in nearly final version : To be completed:

Finalize tuning/replacement of some PMTs in cosmic test bench

Finalize offline DAQ part (output for DB) Tests of DB uploading (done for HVtest package, rest to be

tested)

Ghent: Gap & Chamber QC test set up

16

Popped spacer and leak test setup with Ar.

Operational Cosmic Test Bench – 5 chambers

QC tests on first 21 gaps starts this week

Gap Leak Test

Chamber Cosmic Stand

First Assembled Chamber

Hodoscope for simultaneous validation of:

• Resistivity measurements of 3 gas-gaps with Argon

• HV scans of 3 gas-gaps with RPC gas mixture

• Characterizing of 3 RPC chambers with RPC gas mixture

• Scissor lift for loading the gaps and RPCs in the hodoscope

• HV, LV modules, cables for setting threshold for FEBs, available

17

cosmic stand

Site Manager Lalit Pant

BARC Mumbai, India:

18

CERN Software for RPC characterization is fully implemented at BARC

Its functionality for Dark Current I and Dark Current II measurements has been validated

The configuration works sequentially for evaluation of efficiencies, strip profile, cluster size and noise for the double layers, top layer and bottom layer Efficiency measurement not yet completedTo be implemented noise subtraction from strip profiles

Uploading to Data Base still to be worked out

First Gaps expected to be delivered to BARC on 21.Dec.2012

Chamber Long term test and SM Assembly Site @ CERN

19

20

QC4 Lab: Chamber Long Term Tests

QC4 Responsible: Nicolas Zaganidis

RE4 super module covers a 10 degree sector with handling frame

Super module assembly & installation

21

•24 chambers each 5 weeks•QC4.1 and QC4.2 now in the same lab to minimize dead time.•QC4.2 long term test applied to single chamber (not to SM). •SM Assembly only using good chambers.•Laboratory being equipped. Hardware all secured•Cooling and Leak Test performed on SM.

Chamber and SM assembly schedule

22

Milestones for Chamber Assembly• Chamber mechanical assembly speed is quite fast (1

chamber/day)• Dominating time is QC3 tests (2 weeks) on cosmic stand and

level of parallelism, defined by cosmic stand slots (readout electronics, gas & HV channels…

• Overall we assume a VERY conservative speed of 1 full cosmic stand Quality Certified / month meaning:CERN 10 chambers/monthGENT 5 chamber/monthMumbai 3 chambers/month

NOMINAL ASSEMBLY SPEED 18 CH/MONTH

Milestones for Chamber & SM Assembly and Tests

• First 30 chambers (10 by each assembly site) delivered by end of Mar 2013 @ CERN (Mumbai 3 months, Gent 2 months, CERN 1 month, all have + 1-2 month contingency)

• Additional 3 months will secure chambers for the Endcap1 (72 chambers RE+): end of June 2013

• Additional 4 months will secure chambers for the Endcap2 (72 chambers RE-): end of Nov 2013

• Additional 56 chambers (spares) by Feb 2014

Macro Milestones:

• 36 SM for Endcap1 (RE+) ready for P5 by end Aug 2013• 36 SM for Endcap2 (RE-) ready for P5 by end Feb 2014

The RPC database stores all data about chambers on Barrel, Endcap & RE4 Upgrade:- Design drawings; - Components & Tests;- Construction & Tests;- Cosmic Certification- CMS Operation

RPC ConstructionDB

EndcapDB

(Pakistan)Endcap Data

(Files)

Barrel DB(Bari)

New RE4UpscopeDB

Full history of each chamber: Construction period: chamber

components & tests – bakelite, gaps, chambers, super modules

Cosmic test period: efficiency, cluster size, noise, occupancy

Commissioning period: current monitoring in time, noise rate

CMS operation period: efficiency, cluster size, noise, dark current and a lot more – resistivity tests, gas leak tests…

Interface to ConstructionDB Oracle DB with APEX Oracle web interface

Home Page- https://apex.cern.ch/pls/htmldb_cmsr/f?p=106:1

RPC Construction Database

Developed by D. Uzunova, Pakistan group, Coordinator Anton Dimitrov

25

Services

• Power system has been ordered (India, Pakistan and Italy) on 01.Dec2012. Delivery time of 6 months.

• Link system boards have been ordered by Napoli and Finland in December. Delivery time of 3 months.

• LB Boxes ready by April 2013.• HV connectors and cables will be produced by an external company

(CPE). Place the order in December.• Signal cables will be produced by an external company. Place the order

in December.• Gas racks on schedule ~Dec.2012. Installation as soon as possible.• Gas distributors. Impedance layout system to be defined.• HV distributors. Work starts in March, Pakistan supervision.• T sensor. Fiber delivery@CERN Dec.2012. Tests completed by Apr.2013• Cooling manifold. CSC

26

RE4 Cable

• Skew clear QC working • Signal cable path & lengths for +Z ready.• Signal cables can be produced in 4 batches, in 3 months• HV connectors to be replaced by producer• All cables & connectors at CERN, to be assembled• Tower cabling & Trigger Cabling to be reviewed• Production Rate 5 – 10/day > 2 months work • Installation by Russian Cabling Team

Ian Crotty

RE+4/2/27/A1/CA1/X2J52_e/L4/J1RE+4/2/27/A2/CA1/X2J52_e/L4/J2RE+4/2/27/B1/CA1/X2J52_e/L4/J3RE+4/2/27/B2/CA1/X2J52_e/L4/J4RE+4/2/27/C1/CA1/X2J52_e/L4/J5RE+4/2/27/C2/CA1/X2J52_e/L4/J6

Label

s3D model, developed and validated by the CMS Integration Office, used to secure correct Cable, Cooling, Gas system paths.

Present schedule: RE4+ services 27/05 -17/07 (tower access only), disk (24/09 - 08/10 and 21-29/10 during ME4 commissioning ??) RE4- services 16/10 – 20/11 (tower and disk)

HV Cable and Connectors

We continue with this connector unless a new development can be tested and Mass produced in time.

Cable production was started for the sites. We will restart with a more rigorous test cycling and filtering of connectors before assembly.

CPE firm recognized the defect and is going to replace all the batch

Conclusions (i)

RE4 chamber components, after some initial delay (HPL and Gap production), are on the way: • Mechanics and strips are done. • HPL : half of production delivered in Korea, completion

expected by Dec 2012 (not in critical path)• Electronic (FEB, DB, AB) pilot production validated,

completion by Feb 2013 (not in critical path)• Gap production stared in KODEL on Aug 2012,

conservative production rate 3 gaps/day. Completion by Dec 2013.

Conclusions (ii)

• Ch. Assembly started at CERN and Ghent. 10 chamber/site by Mar 2013

• Ch. Assembly speed 18ch/month (10+5+3) mostly dominated by QC3.

• Chambers for Endcap1 Ready by Jun 2013• Chambers for Endcap2 Ready by Nov 2013• 36 SM for Endcap1 ready to go to P5 by end-Aug 2013

– in present LS1 schedule to be installed and commissioned in Oct-Nov 2013 in parallel with RE+4 services (far too short !!)

• 36 SM for Endcap2 ready to go to P5 by end-Feb 2014– in present LS1 schedule to be installed in Mar (5d) and (7d)

Sept 2014 after CRAFT and 10d in Oct 2014 for commissioned

Summary (iii)

RE4 Production and QC on track for LS1 Schedule

Mandatory all the P5 infrastructures installed BEFORE chamber installation

Mechanical Installation and gas/cooling commissioningdemand 4w, additional time needed for electronic and swapped cable commissioning (possible to be done with detector closed, but demanding additional access to correct error)

RE4 Installation/Commissioning time slotsby far too short in present version