Hi, everyone! I am studying the damage processes in crystalline ceramic samples under energetic ion irradiations. My samples were irradiated at room temperature. Now I want to consider the annealing effect induced by the temperature increase of samples during irradiation(Is this necessary?). And the temperature change in samples during irradiation should be determined. To my knowledge, I should firstly determine how much energy of ions can be converted to the internal energy of target system, and then calculate the temperature change according to the equipartition theory (E=3*N*k*T) or Q=c*m*delta-T (c is the specific heat). Is that right? The question here is that how to determine the energy fraction of ions would be converted to the internal energy of system? Can anyone help to answer this question or give some other suggestions ? Many thanks to everyone!
see the folloing paper:
Wang-defect-annealing-NIMB115-1996-577
All the ion energy is given to the lattice. The question is in which volume?
Thank you very much, Dear Marcel Toulemonde. This paper is very helpful to me. My samples are wafers with a diameter of 12 mm and thickness of 2 mm. I just calculated the number of atoms in a wafer and the energy deposited on it (as you suggested, the energy sum of all implanted ions), and hope to estimate the temperature change induced by ion irradiation. While the effects of flux and heat conduction and diffusion are neglected. Is that all reliable?
no you should take into account the heat conduction. Without heat conduction you have the maximum temperature
Hope the answer given by Marcel is helpful but let me tell U it is a Complex problem and no simple solution can help U. Also read My paper on Annealing of Radiation Damage in SSNTDs.
Annealing effect will affect the 'defects' mostly and least to the Frenkel pairs. Defects can be defined as lattice atom displaced within its dimension or up to say ~1 Angstrom. Frenkel pairs will be affected but their return back on original position is very small. You may run a MC Simulation program. This is a fairly new way of thinking and lot of work will be needed. Some of the defects will be highly probable to return back and at the same time Frenkel pairs that are in new positions will be changing their positions little.
Defects calculation will decide answer.
We have developed a code ( JA-IPU code) of radiation damage and may do such calculation. The code is not so far made public and several papers are already published.
I have not read the paper of Marcel yet, his reply has a meaning and that may be similar in spirit as I have said.
1. Dr V. Kumar has made some confusing statements: It is not Marcel's Paper but listed by him as: Wang-defect-annealing-NIMB115-1996-577.
2. There are hundreds of Papers on annealing of defects in Solids; at least one hundred from our group. Most of Papers are referred to in my Review paper already attached.
3. Similarly, there are more than a dozen codes for radiation damage calculations and JA-IPU code may be one of these. Why not attach it, if it is unique?
1) Professor (retired) Virk is entirely wrong. See the list of authors below and Marcel Toulemonde is an author of the paper.
Defects in metals induced by nuclear collisions and their modifications by swift heavy ion irradiations
Authors:
Wang, Z. G.; Dufour, Ch.; Paumier, E.; Toulemonde, M.
Affiliation:
AA(CIRIL. UMR CEA-CNRS, Rue Claude Bloch, BP 5133. 14040 Caen Cedex, France; On leave from Institute of Modern Physics, Academia Sinica, 253 Nanchang Road, 730000 Lanzhou, China.), AB(LERMAT, URA CNRS 1317, ISMRa, Campus II, Bd.Mal Juin, 14050 Caen Cedex, France), AC(CIRIL. UMR CEA-CNRS, Rue Claude Bloch, BP 5133. 14040 Caen Cedex, France; On leave from Institute of Modern Physics, Academia Sinica, 253 Nanchang Road, 730000 Lanzhou, China.), AD(CIRIL. UMR CEA-CNRS, Rue Claude Bloch, BP 5133. 14040 Caen Cedex, France; On leave from Institute of Modern Physics, Academia Sinica, 253 Nanchang Road, 730000 Lanzhou, China.)
2) I only suggested Monte Carlo method to be used and indicated an intricacy of defining defects and Frenkel pairs.
3) It is up to the Question raiser what to do ?
4) I never have intention of our publicity. I mentioned our code because intricacy is handled in that code .
Regards for the senior's attitude.
Using Google Search for Wang-defect-annealing-NIMB115-1996-577; I tracked another Paper where Marcel is missing as Co-author. Thanks for correction. But remember, every Tom, Dick and Harry is using Monte Carlo for developing Codes but none is found to be Perfect so far.
Many thanks to all of you, Marcel Toulemonde, Hardev Singh Virk, V. Kumar. Your answers are really valuable.
How many codes are developed in India? You can explode a row bomb and it is not necessary that it is validated. We normally depend on western world and ultimately authentic data will matter for your claims. I am skipping true example.
I wish that you happen to develop a code. I am sure at last you will appreciate that it is a very difficult task.
There are thousands of Tom, Dick and Harry who do parallel experiments. Better we learn how to appreciate others works !!
This is not a plateform to discuss all this rubbish.
Thanks
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