title: An analytical approach of thermodynamic behavior in a gas target system on a medical cyclotron.
abstract: An analytical model has been developed to study the thermo-mechanical behavior of gas targets used to produce medical isotopes, assuming that the system reaches steady-state. It is based on an integral analysis of the mass and energy balance of the gas-target system, the ideal gas law, and the deformation of the foil. The heat transfer coefficients for different target bodies and gases have been calculated. Excellent agreement is observed between experiments performed at TRIUMF's 13 MeV cyclotron and the model.
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3; Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T1Z3.
authors.forename: Pouyan
authors.initials: P
authors.lastname: Jahangiri
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3; Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T1Z3.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Zacchia
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3.
authors.forename: Ken
authors.initials: K
authors.lastname: Buckley
authors.affiliation: British Columbia Cancer Agency, 675 West 10th Avenue, Vancouver, BC, Canada V5Z1L3.
authors.forename: François
authors.initials: F
authors.lastname: Bénard
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3.
authors.forename: Paul
authors.initials: P
authors.lastname: Schaffer
authors.affiliation: Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T1Z3.
authors.forename: D Mark
authors.initials: DM
authors.lastname: Martinez
authors.affiliation: TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada V6T2A3. Electronic address: choehr@triumf.ca.
authors.forename: Cornelia
authors.initials: C
authors.lastname: Hoehr
mesh_terms: D017357:Cyclotrons; D005740:Gases; D006801:Humans; D007553:Isotope Labeling / Q000379:methods*; D008962:Models, Theoretical; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals / Q000302:isolation & purification*; D013816:Thermodynamics
chemical_list: D005740:Gases; D019275:Radiopharmaceuticals
keywords: Gas target; Medical cyclotron; PET isotopes; Thermodynamical model