A two-wavelength ethylene-absorption temperature diagnostic

There are limited studies on the diagnosis of heat and temperature misconceptions using a four-tier instrument diagnostic test. Therefore, this study aims to identify misconceptions in heat and temperature material. The survey research was conducted on 164 students at SMAN 2 Bantul. Students were selected using a convenience sampling technique. Identification of student misconceptions using the Four Tier Heat and Temperature Diagnostic Test (4T-HTDT). Students' conceptual understanding is calculated using the percentage technique. The results of this study indicate that there are still many students who have misconceptions on the concept of "heat-temperature as an extensive quantity" and "heat-temperature depends on material objects". The findings are expected to be a strategic step for designing appropriate remedial teaching.

Download Full-text

Demonstrating the limitations of line ratio temperature diagnostic using Fe X and Fe XIV spectral line intensity observations

10.1063/1.51380 ◽

1996 ◽

Author(s):

Ruth Esser ◽

Nancy S. Brickhouse ◽

Shadia R. Habbal ◽

Amy Mossman

Keyword(s):

Spectral Line ◽

Line Intensity ◽

Line Ratio ◽

Spectral Line Intensity ◽

Temperature Diagnostic

Download Full-text

Numerical simulation of emission spectra from ion beam-heated aluminum plasmas

Laser and Particle Beams ◽

10.1017/s0263034600004444 ◽

1992 ◽

Vol 10 (2) ◽

pp. 349-363 ◽

Cited By ~ 4

Author(s):

J. J. MacFarlane ◽

P. Wang

Keyword(s):

Cross Sections ◽

Impact Ionization ◽

Ion Beam ◽

Emission Spectra ◽

Particle Beam ◽

Rate Equations ◽

Hartree Fock ◽

Non Local ◽

Temperature Diagnostic ◽

Ionization Cross Sections

Non-local thermodynamic equilibrium radiative transfer calculations have been performed to predict emission spectra from plasma heated by intense proton beams. Multilevel, steady-state atomic rate equations were solved self-consistently with the radiation field to determine excitation and ionization populations. Ion beam effects were, included in the rate equations. Proton-impact ionization cross sections were calculated using a plane wave Born approximation model with Hartree-Fock wave functions for the electrons. We examined the dependence of emission spectra on the temperature and thickness of the plasma. In addition, Kα satellite line spectra were computed to assess its potential as a temperature diagnostic. Calculated Kα spectral results are compared with recent Particle Beam Fusion Accelerator II experimental data.

Download Full-text

The Interpretation of EUV Spectra of Sunspots

International Astronomical Union Colloquium ◽

10.1017/s025292110009624x ◽

1983 ◽

Vol 71 ◽

pp. 325-326

Author(s):

J.G. Doyle ◽

J.C. Raymond ◽

R.W. Noyes ◽

A.E. Kingston

Keyword(s):

Observational Data ◽

Electron Density ◽

Constant Pressure ◽

Wavelength Region ◽

Constant Density ◽

Ionization Equilibrium ◽

Sensitive Line ◽

Temperature Diagnostic

We report here on EUV observations of a sunspot observed by the Harvard instrument on Skylab. The observational data used here have been presented in a previous paper by Noyes et al. (1982), in which line identifications and intensities for the wavelength region 350 – 1350 A were given. Several electron density sensitive line ratios suggest a constant density, rather than constant pressure, emitting region, while temperature diagnostic line ratios of several ions yield temperatures below the temperatures expected in ionization equilibrium.

Download Full-text