TPC-Meeting : K

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TPC-Meeting Københaven 2.9.02

• Ne-CO2 Gas System Status
• CO2 - Gas System Insulating Gap
• Resistor Rod
• Contacts
• Cooling --gt Liquid
• Cooling --gt Gas

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Ne-CO2 - Gas System

• Mixing Unit ok
• Compressor Rack ok
• Cleaning Cartridges ok
• Pressure Tank ok
• CO2 - Remover prep
• Hardware ready --gt Jan 2003
• Slow control --gt mid 2003

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Ne-CO2 - Gas Quality Controls

• CO2 - Monitor (0.1) --gt permanent
• 2(O2 H2O) -Monitors --gt permanent
• 2 Goofie - Drift-Monitors --gt permanent
• Drift vel lt 1 o
• Gas (in out mounting near TPC-vessel)
• Gas Chromatograph --gt if needed
• N2 impurities(CHn SF6 ect.)

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CO2 - Insulation Gap Gas System

• CO2 - Recovery
• Closed System
• Design Meeting --gt Alice week sept.02

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TPC_Resistor Rod

• Promised
• Weight Watching Contacts
• 1/4 100 cm Model
• Cooling Tests
• 100 cm Model
• HV Security Tests
• 200 cm Model

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Contacts
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Water flow
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Cooling Efficiency --gt T.M --gt BTC !
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Rod - Cooling Systems

• Leakless Water Cooling
• Control System like FECs
• 10 mm Pipes
• Cost 25 kSFR
• CO2 - Gas Cooling
• 60 mm Pipes 50 m
• Leaks into Ne_CO2 Volume ???
• Cost (30 components 30 labor (?)
• 20 heat exchanger ) --gt 80 kSFR (?)

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Rod-HV- Tests

• 300 kV HI-Injector _at_ GSI
• 30 Years of HV-Operation
• With
• Distilled Water-Resistor Chain

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300 kV GSI Ion Source

• Uses since 30 years
• Destilled Water Channel as 300kV Divider
• Interlock Water Quality
• lt 2 µ Siemens / cm
• Resistor Rod HV test
• Rod-Cooling Water Channel --gt
• Connected to HV with Copper-Return Bridge
• Additonal parallel resistor --gt f(water
  quality)
• Ares test setup

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HV-Test _at_ GSI HI - source

• Rod in Nitrogen Atmosphere
• Rod filled with
• Nitrogen
• Distilled Water ( lt 0.1 lt1 µ Siemens)
• Circulation Pump OFF
• Tap - Water
• ?V_last Resistor
• Total Rod Current

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Conclusions I

• Removable Resistor Rod
• Possible --gt go_to --gt 250 cm
• AGC --gt
• very efficient -gt results soon
• Price Space
• Liquid Cooled Rod internally save
• HV Leak
• Ceramic Bridge --gt Security Factor 1015
• Rod Resistivity f (water quality) --gt adjust !

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Conclusions II

• Remaining Heat Sources in TPC
• G_Ohm Resistor Chain -gt up to 4 Watt
• Lets Cool them !!!

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4W - Distilled Water Resistor Chain

• Adjust Water Quality
• --gt (0.05 and 2) µ_Siemens
• ( 18 --gt 0.5 ) M_Ohm / cm
• TPC Gas Heat Problem gone !