Radiator gas system description:

The gas radiator re-circulating system is used to provide pure C4F10 gas to 
the RICH vessel. The overall system volume is approximately 2,000 cubic feet.
The system contains a molecular sieve to remove water vapor and particulates 
from the gas, a metal bellows pump, and an expansion volume to passively 
compensate for external atmospheric pressure changes. The expansion volume 
is about 10% of the total gas volume. The concern about atmospheric pressure 
changes is even small differential pressures between the interior and exterior 
of the tank cause large stresses and deflections in the entrance and exit 
windows. Space constraints near the entrance and exit windows prohibit large 
deflections. To remove nitrogen, oxygen and other gases that may be present in 
the system, an additional circuit is added to the re-circulating system in 
parallel. The additional circuit contains a compression pump that condenses 
the C4F10 gas at approximately 3 atmospheres pressure, the gases that do not 
condensate are vented through a relief valve set at a pressure just above the 
condensation pressure of the C4F10 gas. The pure liquefied C4F10 can then be 
vaporized and re-enter the system through a regulator valve set at a pressure 
just below the C4F10 critical condensation pressure. The monitoring system 
records temperatures and pressures. The control system when purifying the 
radiator gas controls pumping speeds to maintain an internal vessel pressure 
equal to the atmospheric pressure.


Notes to Syracuse:
The temperature of the gas is not controlled but could be maintained using 
building water in a heat exchange. UV sterilization is not provided, density 
measurements are provided, index of refraction measurements are not provided. 
As the gas is circulated from the assembly hall into the collision hall it 
will probably become the temperature of the collision hall. The thermal mass 
of the RICH is very large, about 25% that of all air in the collision hall. 
The final purity of the gas wont be known until measured and depends highly on 
the number of leaks.


Liquid radiator re-circulating system description:

The liquid radiator re-circulating system is used to provide pure, thermally 
stable, liquid C5F12 to the five liquid radiator vessels. The overall system 
volume is approximately 20 gallons. A single particulate filter, pump, and 
temperature regulating heat exchanger is used to circulate and condition the 
fluid. A manifold system cannot be used to supply the fluid to the vessels due 
to the increased static head applied by the upper vessels on the lower vessels.
The increased fluid static head applied by the upper vessels causes the stress
on the quartz window to exceed the quartz critical breaking stress. To   
prevent additional stresses on the quartz, both the inlet and outlet of the   
vessel is open to atmosphere. The inlet to the vessel is slightly elevated 
above the top of the vessel, the outlet is even with the top of the vessel. 
When liquid is added to the inlet, fluid flows through the vessel and pours 
into a drain tube that returns the liquid to a reservoir for re-circulation. 
Any excess liquid supplied to the vessel inlet by the pump is transported 
through a bypass line to the drain. Inside the reservoir is a PLC controlled 
heat exchanger that conditions the temperature of the fluid. The fluid is then 
pumped through a particulate filter and then supplied to the inlets of the 
individual vessels.  The pump, reservoir, heat exchanger, and filter are 
located in the assembly hall area for easy access and maintenance. Transfer 
lines into the collision hall are used to supply fluid to the vessels and also 
to capture and return the fluid back to the system. 


Notes to Syracuse:
The temperature of the liquid can be maintained using building water in the 
heat exchanger so a chiller is not needed. UV sterilization is not provided, 
density measurements is not provided, index of refraction measurements are not 
provided. As the liquid is circulated from the assembly hall into the 
collision hall it will probably become the temperature of the collision hall. 
Vapor and water absorption are not measured or accounted for. Vapor absorption 
into the liquid could be as high as 25 mg air/liter of liquid.