Event Title

Inversion for Multi-Parameter Depth-Profiles: Thermal Conductivity and Thermal Impedance

Location

Snowbird, UT, USA

Start Date

1-1-1999 12:00 AM

Description

Recently, the depth profile reconstruction of the thermal conductivity or diffusivity of inhomogeneous samples has attracted considerable interest [1–4]. But in most of these works, a mathematical model for unknown profiles was a prior assumed, then some parameters were adjusted to fit the measured data. Moreover, only the thermal conductivity or thermal difrusivity profile with known density and specific-heat had been investigated. An alternative method had been introduced in our previous articles [5–7], which is based on a hybrid of Newton-like iterative method and regularization method. Using this method, two different experimental techniques had been used for reconstruction theories of the thermal conductivity depth profile: (1) photoacoustic or photothermal signal with a plane heat source [5–6], (2) modulated photoreflectance technique [7] with a Gaussian pumping laser, which had demonstrated the possibility of practical application by numerical simulations with random noise.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

18A

Chapter

Chapter 2: Electromagnetic, Thermal, and X-Ray Techniques

Section

Thermal Waves

Pages

619-626

DOI

10.1007/978-1-4615-4791-4_79

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Inversion for Multi-Parameter Depth-Profiles: Thermal Conductivity and Thermal Impedance

Snowbird, UT, USA

Recently, the depth profile reconstruction of the thermal conductivity or diffusivity of inhomogeneous samples has attracted considerable interest [1–4]. But in most of these works, a mathematical model for unknown profiles was a prior assumed, then some parameters were adjusted to fit the measured data. Moreover, only the thermal conductivity or thermal difrusivity profile with known density and specific-heat had been investigated. An alternative method had been introduced in our previous articles [5–7], which is based on a hybrid of Newton-like iterative method and regularization method. Using this method, two different experimental techniques had been used for reconstruction theories of the thermal conductivity depth profile: (1) photoacoustic or photothermal signal with a plane heat source [5–6], (2) modulated photoreflectance technique [7] with a Gaussian pumping laser, which had demonstrated the possibility of practical application by numerical simulations with random noise.