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Helium Cooling SystemThe TRIUMF licensed helium cooling system provides cooling of helium windows on TRIUMF PET targets or customer specific targets. The system is designed to simultaneously cool two targets with each target operating on an independent compact D-Pace beamline or customer specific beamline. The system can also be adapted to other applications where the same amount (or less) cooling is required.  Fig. 1: Helium Cooling System Front View Feature
 Fig. 2: Standard Cooling System Iso View ApplicationA typical arrangement would have one cyclotron with two beamlines. One helium cooling system provides cooling to the targets of both beamlines. Each beamline would have a two position target changer with either two targets mounted or a single target and a Faraday cup. Where two or more targets are located on one target selector the targets are connected in series so only one supply line and one return line is needed per beamline. The helium cooling system is located inside the cyclotron vault. Operation and monitoring is done remotely through a PLC. Both standard water targets and high current water targets are supported. Contact D-Pace for other applications. A metal bellows pump circulates helium through the targets and a water cooled coaxial condenser. Solenoid valves are used to direct the flow to the targets on the first, second or both beamlines. Sensors detect if the helium flow rate or system pressure is below acceptable levels or if the helium temperature is too high. This system has also been used to support only one beamline with no modifications required. Technical Performance CharacteristicsThe helium cooling system is capable of simultaneous cooling up to two targets (each with 10-20MeV proton bombardment at 80 micro-amps). The system supplies helium at 130 slpm with a system pressure of 10 psig. Interface Technical SpecificationsThere are several connections required to successfully operate the helium cooling system. These are:
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