TOF Gas System

Project Overview

Content

• Prototype for Aging tests done for RPC’s • TOF Gas System: parameters and module

layouts.

• Special Technology: channel flow meter

• Materials List• Components: selection, cleaning,

procurement.

• Deliverables from TA1• Cost and Schedule

RPC Aging Test (ATLAS and CMS)

• Realistic test of chamber response with a closed loop gas system.

• Gas system uses as many final components as possible.

• Tests running since mid-June 2003 in GIF.

First results show that the purification of these gases is feasible, but the use of regeneratable purifiers

could be very tricky.

Overview

Mixer

CompressorUnit

USADistribution

PurifierPrimarySupplies

Gas BuildingRecovery

Vent

PLUG

UX Cavern

DistributionRacks

Analysis

(optional)

Detector

SG to Plugpipe length

90 m

Plug to UXpipe length

~ 100 m

TOF Gas System Main Parameters

Gas mixture:C2H2F4 / iC4H10 / SF6

90% / 5% / 5%

Total volume: 16 m3

Total nom. circulation flow: 1.0 m3/h

Max. circulation flow: 2.5 m3/h

Nominal replenishing flow: 20 ltr./h (2%)

Max. replenishing flow 80 ltr./h (8%)

Chamber pressure 0.5 - 2.0 mbar

Hydrostatic Diff. (per height zone) ~ 1.3 mbar

Max. overpressure 3 mbar

No. of Channels 36

No. of Sub-Dis. Units 2

No. of UX Racks 2

(non-flammable)

Gas Circulation LoopDistribution units

2 independent Regulations.

Pump Module

MixerModule

Purifier Module

Purifier Module

Twin column Purifier Module with inline regeneration.

Note:

At this stage it is unclear whether such a Purifier

is suitable for the TOF detector.

Mixer Module

PI PT

Exhaust

HV 1101 PICV 1102

1102 1103

YV 1105

YV1108

XMFC 1106

XMFC 1109 HV1110

YV 1107

NV 1111Sampling

PI PT

Exhaust

HV 1101 PICV 1102

1102 1103

YV 1105

YV1108

XMFC 1106

XMFC 1109 HV1110

YV 1107

NV 1111Sampling

PI PT

Exhaust

HV 1101 PICV 1102

1102 1103

YV 1105

YV1108

XMFC 1106

XMFC 1109 HV1110

YV 1107

NV 1111Sampling

Fill

PI

HV1009

YV1004

YV1006

FIV 1003

PICV 1005

1005

Sampling

PT1007

Exhaust

Exhaust

PSV 1104

PSV 1204

PSV 1304

CHF2 2 4

iCH4 10

SF6

Mix

er

PSV 1008

YV1002

3 Primarygases

Mixture : C2H2F4 / iC4H10 / SF6

90% / 5% / 5% (non

flammable)

Permanent IR–analysismonitoring iC4H10 concentration

Fill and Run MFC for each gas

Pipe Summary

To be checked by TOF Group

Pipe SectionReynolds

No.

P [mbar]

Reynolds No.

P [mbar]

Supply 1 20/22 90 1000 5489 2.9 16475 19.0

Return 1 20/22 90 1000 5489 2.9 16475 19.0

Supply 2 20/22 100 500 2744 0.79 8234 6.4

Return 2 33/35 100 500 1660 0.1 8234 0.6

Supply 36 8/10 25 28 385 0.3 1152 0.8

Return 36 10/12 25 28 307 0.1 922 0.3UX - Detector

Pipe Diameter

[mm]

Pipelength

[m]

Nom. Flow 3 x Nom. Flow

SG1 - Plug

Plug - UX

Supply / Return

Flow/channel [bar*l/h]

No. of Pipes

existing

new

Distribution Rack (One Unit) Flow Cells measuring input output flows

Ø=10/ 12 mm

Flushing Gas

0-30 l/h

2 mbar

1 mbar

Back-up system

0-300 l/h

100% CHF2 2 4

Channel purge

1234PT

1234PT

PI6181PI

HV 6141 YV 6123 HV 6144

6124

XBUB 6142

PCV6161 HV6162

FICV 6164

FICV 6165xBUB 6167

6161YV 6171

PICV 6176HV 6178

YV 6172

xBUB 6143

FICV 6173

HV 6146YV 6127

6128

FE 6106/1

6176 xBUB 6174

FE 6106/18

FV6101/1 FE 6102/1

FV6101/18 FE 6102/18

Supply:Ø= 8/ 10 mm

ReturnØ= 10/ 12mm

Supply tubingØ=26/ 28 mm

Return tubing Ø=33/ 35 mm

HV

614

7

Gasanalysis

ZC6128

PC6128

PCV 6128

PT6125

Pressure controlle

r

Back-up gas for power faillures

PT100 Channel Flow Meter

Flow Cell incorporated in input and output gas manifolds.

Measurement Principle:1) Measure ambient temperature.2) Switch on heating current3) Wait until T has risen by

T=20oC.4) Take last 50 points and fit

slope.5) Wait until cool down to

ambient T. (~40 sec.)

1 2 3

4

5

Measurement cycle time 12-15 s

Proposed by M. Bosteels

Developed by: S. Haider,

C. Zinoni + S. Morozov

Materials List

preferred forbidden preferred forbidden preferred forbidden preferred forbidden preferred forbidden preferred forbidden preferred forbidden

HMPID CH4 (Ar)

Neoprene, Buna N, NBR, Nordel, EPM,

EPDM

RTV

Stainless Steel

AluminiumCupper, Brass, Ni

- Br4Araldit AW103

Teflon band

Si-jointLoctite

to be specified

Si-free any other

CPVAr - CO2

(80 - 20)

Neoprene, Buna N, NBR, Nordel, EPM,

EPDM

RTV

Stainless Steel

AluminiumCupper, Brass, Ni

- Br4Araldit AW103

Teflon band

Si-jointLoctite

to be specified

Si-free any other

PMDAr - CO2

(70 - 30)

Neoprene, Buna N, NBR, Nordel, EPM,

EPDM

RTV

Stainless Steel

AluminiumCupper, Brass, Ni

- Br4Araldit AW103

Teflon band

Si-jointLoctite

to be specified

Si-free any other

CPCAr - CO2 - CF4

(70 - 29.5 -0.5)

Neoprene, Buna N, NBR, Nordel, EPM,

EPDM

RTV

Stainless Steel

AluminiumCupper, Brass, Ni

- Br4Araldit AW103

Teflon band

Si-jointLoctite

to be specified

Si-free any other

RPCAr - iC4H10 - C2H2F4 -

SF6 - H2O

(48-7-40-4-1)

Neoprene, Nitrile, NBR,

Buna N,spec. Viton

Viton ANatural Rubber,

Nordel, RTV

Stainless Steel

AluminiumCupper

Brass Br4

PTFE (sw elling)

Polyurethane bad effects

under radiation

Araldit AW103

Teflon band

to be specified

Si-free any other

TOFC2H2F4 - IC4H10 - SF6

(90 - 5 - 5 )

Neoprene, Nitrile, NBR,

Buna N,spec. Viton

Viton ANatural Rubber,

Nordel, RTV

Stainless Steel

AluminiumCupper, Brass, Ni

Br4

PTFE (sw elling)

Polyurethane bad effects

under radiation

Araldit AW103

Teflon band Paraffin Si-free any other

Bubbler OilsMetals Plastics LubricantsElastomeresGas System

Thread Thightness

Glues

To be checked by TOF Group

Cleaning, Component Selection + Procurement

• Many tests done for component purity. • Arrangements with suppliers for grease free

components are put in place.• Extra cleaning for some components is done

at CERN. (depends on requirements, serious congestion in

cleaning CERN service) • Numerous compatibility tests for radiation

and B-field compatibility. All electrical and electronic components are tested.

• Simplified purchasing procedures arranged by SPL with many suppliers.

Work share for TOF Gas System

• TA1 will cover the design, procurement of components, construction and installation of the gas racks.

• Commissioning will entail several phases, and needs participation from the TOF group.

• Deliverables from TA1:– Gas system modules: Mixer, (Purifier), Circ. Rack, Pump, 2

Distribution racks and some (minimal) Analysis.– Control system for all modules, PLC’s, etc. (not the PC’s for the control

room).– Documentation: schematics, technical descriptions, user instruction

manuals,• To be covered by ALICE TC or TOF Group:

– Modifications to existing fixed piping network : SG to Plug and Plug to UX.

– New gas piping for connections from Distribution Racks to Chambers.– Cabling between Zones: SG to Plug, Plug to UX, and any cables to the

chambers.

requires definition from detector group

Cost Estimate

Gas Modules Component CostTOF

System

Mixer 37,032

Purifier 30,000

Circulation and Pump 21,480

Distribution Plug 6,678

Distribution UX 43,960

Gas Analysis Sampling 5,700

Electrical Control Equipment 37,000

Total 181,850

Pipework cost(includes Material, cleaning and installation)

SG-Plug (modifications) costed elsewhere

Plug to UX Piping (modifications) costed elsewhere

Detector Piping 25,272

Costs for external cables (includes Material and installation)

8,000

Manpower for Rack Construction 101,818 (14 m-months)

Manpower for Rack Installation 29,091 (4 m-months)

Grand-Total 346,031

Grand-Total (without Manpower) 215,122

Gas Installation Periods(as they are known today)

Detector Units

ATLAS

SG Building

USA15

UXA15

Barrel (MDT +RPC)

SW (CSC, MDT + TGC)

BW (MDT +TGC)

EO (MDT)

CMS

SG Building

USA55

UXA15

LHCb

SG Building

UX - Muon + OT

UX - RICH's

ALICE

SG Building

Plug

UX

TPC

20062003 200720052004

Core Installation periods

Possible extensionMilestoneSpecial System

TOF

Construction Schedule for Distribution units:

Two Options:1) Starting end 2004 for delivery in 2005.

Disadvantage: risk schedule shift in ATLAS which makes this period very busy.

2) Starting end 2003, so in parallel (or before) with ATLAS construction.

This is to be discussed and decided by September 2003.