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CONDUCTION HEAT TRANSFER IN A MASS SPECTROMETER FILAMENT

CONDUCTION HEAT TRANSFER IN A MASS SPECTROMETER FILAMENT. Conduction Heat Transfer MEAE-6630 Angela Mangio. Acceleration. Area. Ionization. Sample. Area. Inlet. Light Ions. Ion. Detector. Heavy Ions. CONDUCTION HEAT TRANSFER. CONDUCTION HEAT TRANSFER. PROBLEM STATEMENT

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CONDUCTION HEAT TRANSFER IN A MASS SPECTROMETER FILAMENT

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  1. CONDUCTION HEAT TRANSFER IN A MASS SPECTROMETER FILAMENT Conduction Heat Transfer MEAE-6630 Angela Mangio

  2. Acceleration Area Ionization Sample Area Inlet Light Ions Ion Detector Heavy Ions CONDUCTION HEAT TRANSFER

  3. CONDUCTION HEAT TRANSFER • PROBLEM STATEMENT • To determine the heat generated at the filament to ensure proper material selection of the internal mass spectrometer component. • To determine the time required for the filament to achieve steady state conditions at the two specified current settings

  4. CONDUCTION HEAT TRANSFER • Methodology • Steady-state • Straightforward solution of mathematical formulation • Transient • Numerical Methods • Finite Differencing • Implicit Approach

  5. CONDUCTION HEAT TRANSFER • Low Current Setting • Mesh spacing • r = 7.94 x10-3 m • t = 0.08 seconds • Transients converged after 5.3 minutes • Within 0.39% of steady-state • Center Temperature =23.1006C • Surface Temperature =23.1005C

  6. CONDUCTION HEAT TRANSFER • High Current Setting • Mesh spacing • r = 2.74 x10-3 m • t = 0.1 seconds • Transients converged after 6.3 minutes • Within 0.06% of steady-state • Center Temperature =211.443C • Surface Temperature =211.433C

  7. CONDUCTION HEAT TRANSFER • Conclusions • Transient Temperatures Profiles Corresponding to the 2 Current Settings Determined • Steady-State Temperatures Calculated • Time to Achieve Steady-State Conditions Identified

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