ALICE TPC Ne/CO2 Gas System

Mixing Rack

Gas Mixture AnalysisOxygen

HOetc.

2

Calibration GasesReference Gases

Primary Gases

0 - 10 bara

0 - 10 baracirculation

loop

purgeexhaust

Run

Fill

Run

Fill

Bypass

Run atconstant flow

Fillor pressure regulated

fromChmabers

toChmabers

2

4

mixer

DP

P

DP

P

DP

P

n-wayvalve

05-12-2001 /FH/GWG

MixerComponent Layout

12

3

4

5

6

9

7

8

12

13

14

10

11

1

1 1

1

CO2-Removal & (O2,H2O)-Cleaning

Rack

Pumping and Storing Rack

Gas system Racks :

• Getting ready

• Individually PLC-controlled

--> connect functionality

CO2 - Purging Mode

Ne/CO2 - Running Mode

User interface panels for ALICE TPC gas control system

• PVSS• Prepared by IT/CO team under R.Barillere• First panel prototypes are available

PVSS Pumping module

PVSS Mixer

module

Purifier module

Purifier column sub-panel

TPC Gas Controls Milestones

• First versions of all necessary PLC modules available by the end of 2002. With this we can operate individual racks, test and hardware

--> debug them…• Full PVSS version by Q1 2003 (dependant

on UNICOS library updates)• Full test of gas system + controls on test

volume by Q2 2003

Connection: Gas System --> DCS Parameter list:

• (T, P) --> in, out, compressor, - cleaning, supply

bottles,

• (O2, H2O) --> in, out,

• Ne/CO2 --> mixer

• V_drift --> Goofie

Goofie Drift Velocity Monitor

2 monitorsIn caveT_stabilizedP = TPCVdrift = in & out

G

G

Goofie Control Card:

• Preamplifiers • shapers • Digitizer : Altro - veccio • Profibus Controller

• Applicom• --> Labview • --> Analysis

Goofie Control Status :

• Detector --> PT ready

• Card layout --> ready

• Mounting --> pending

• Plc-programming --> pending

• Labview Analysis --> On to do list

• DCS connection --> Go to to do list

Summary : TPC Gas System

• Hardware ready --> end 2002

• Local Control --> end 2002

• PVSS controlled --> mid 2003

• PVSS - DCS --> end 2003

• Goofie --> ???