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The energy loss induced by electron collisions in weakly ionized air plasma is calculated based on the electron energy distribution function that we obtained. Since there are a lot of low-energy-threshold molecular rotation and vibration excitations and the electron-molecule energy transfer is inefficient in elastic collision, the fraction of energy loss for electron elastic collision (less than 6%) is negligible. Among different collision processes the electron energy loss is dominant in different energy regions. As the effective electron temperature (or the reduced electric field) increases, the dominant energy loss process becomes sequentially rotational excitation, vibrational excitation, electronic excitation, collisional ionization, and accelerating ionized electrons. When E/N=1350 Td (or Te=14 eV), the average energy loss per ion-electron pair reaches a minimum value of 57 eV. By controlling the electric field according to the requirement in applications, we can control the electric field to achieve a higher energy efficiency.
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Keywords:
- weakly ionized air plasma /
- electron collision /
- electron energy loss
[1] Liberman M A, Lichtenberg A J 2005 Principles of Plasma Discharges and Materials Processing (Hoboken: Wiley & Sons)
[2] Becker K H, Kogelschatz U, Schoenbach K H, Barker R J 2005 Non-Equilibrium Air Plasma at Atmosphere Pressure (London: IOP Publishing)
[3] Starikovskaia S M 2006 J. Phys. D: Appl. Phys. 39 R265
[4] Siefert N S 2007 Phys. Fluids 19 036102
[5] Kuo S P 2006 Phys. Plasmas 13 033505
[6] Gurevich A V, Borisov N D, Milikh G M 1997 Physics of Microwave Discharges (Amsterdam: Gordon and Breach Science Publishers)
[7] Vidmar R J 1990 IEEE Trans. Plasma Sci. 18 733
[8] Gurevich A V, Litvak A G, Vikharev A L, Ivanov O A, Borisov N D, Sergeichev K F 2000 Phys. Uspekhi 43 1103
[9] Macheret S O, Shneider M N, Miles R B 2001 Paper AIAA 2001 2940
[10] Krile J T, Neuber A A, Krompholz H G, Gibson Thomas L 2006 Appl. Phys. Lett. 89 201501
[11] Dijk J V, Peerenboom K, Jimenez M, Mihailova D, Mullen J V D 2009 J. Phys. D: Appl. Phys. 42 194012
[12] Kusher M J 2006 J. Phys. D: Appl. Phys. 42 194013
[13] Kim H C, Iza F, Yang S S, Radmilovic-Radjenovic M, Lee J K 2005 J. Phys. D: Appl. Phys. 38 R283
[14] Zhou Q H, Dong Z W, Chen J Y 2011 Acta Phys. Sin. 60 125202 (in Chinese) [周前红, 董志伟, 陈京元 2011 60 125202]
[15] Nam S K, Verboncoeur J P 2008 Appl. Phys. Lett. 99 231502
[16] Nam S K, Lim C, Verboncoeur J P 2009 Phys. Plasmas 16 023501
[17] Boeuf J P, Chaudhury B, Zhu G Q 2010 Phys. Rev. Lett. 104 015002
[18] Chaudhury B, Boeuf J P, Zhu G Q 2010 Phys. Plasmas 17 123505
[19] Raizer Y P 1991 Gas Discharge Physics (Berlin: Germany: Springer-Verlag)
[20] Macheret S O, Shneider M N, Murray R C 2006 Phys. Plasmas 13 023502
[21] Macheret S O, Shneider M N, Murray R C, Miles R B 2005 Paper AIAA 2005 0202
[22] Macheret S O, Shneider M N, Miles R B 2002 AIAA J 40 74
[23] Gudmundsson J T 2005 Univ. Iceland Tech. Rep. RH-09-2005
[24] Gudmundsson J T 2002 Univ. Iceland Tech. Rep. RH-21-2002
[25] Zhou Q H, Dong Z W 2011 Acta Phys. Sin. 62 015201 (in Chinese) [周前红, 董志伟 2011 62 125201]
[26] Phelps A V, Pitchford L C 1985 Phys. Rev. A 31 2932
[27] Itikawa Y, Hayashi M, Ichimura A, Onda K, Sakimoto K, Takayanagi K 1986 J. Phys. Chem. Ref. Data 15 985
[28] Itikawa Y 2009 J. Phys. Chem. Ref. Data 38 2689
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[1] Liberman M A, Lichtenberg A J 2005 Principles of Plasma Discharges and Materials Processing (Hoboken: Wiley & Sons)
[2] Becker K H, Kogelschatz U, Schoenbach K H, Barker R J 2005 Non-Equilibrium Air Plasma at Atmosphere Pressure (London: IOP Publishing)
[3] Starikovskaia S M 2006 J. Phys. D: Appl. Phys. 39 R265
[4] Siefert N S 2007 Phys. Fluids 19 036102
[5] Kuo S P 2006 Phys. Plasmas 13 033505
[6] Gurevich A V, Borisov N D, Milikh G M 1997 Physics of Microwave Discharges (Amsterdam: Gordon and Breach Science Publishers)
[7] Vidmar R J 1990 IEEE Trans. Plasma Sci. 18 733
[8] Gurevich A V, Litvak A G, Vikharev A L, Ivanov O A, Borisov N D, Sergeichev K F 2000 Phys. Uspekhi 43 1103
[9] Macheret S O, Shneider M N, Miles R B 2001 Paper AIAA 2001 2940
[10] Krile J T, Neuber A A, Krompholz H G, Gibson Thomas L 2006 Appl. Phys. Lett. 89 201501
[11] Dijk J V, Peerenboom K, Jimenez M, Mihailova D, Mullen J V D 2009 J. Phys. D: Appl. Phys. 42 194012
[12] Kusher M J 2006 J. Phys. D: Appl. Phys. 42 194013
[13] Kim H C, Iza F, Yang S S, Radmilovic-Radjenovic M, Lee J K 2005 J. Phys. D: Appl. Phys. 38 R283
[14] Zhou Q H, Dong Z W, Chen J Y 2011 Acta Phys. Sin. 60 125202 (in Chinese) [周前红, 董志伟, 陈京元 2011 60 125202]
[15] Nam S K, Verboncoeur J P 2008 Appl. Phys. Lett. 99 231502
[16] Nam S K, Lim C, Verboncoeur J P 2009 Phys. Plasmas 16 023501
[17] Boeuf J P, Chaudhury B, Zhu G Q 2010 Phys. Rev. Lett. 104 015002
[18] Chaudhury B, Boeuf J P, Zhu G Q 2010 Phys. Plasmas 17 123505
[19] Raizer Y P 1991 Gas Discharge Physics (Berlin: Germany: Springer-Verlag)
[20] Macheret S O, Shneider M N, Murray R C 2006 Phys. Plasmas 13 023502
[21] Macheret S O, Shneider M N, Murray R C, Miles R B 2005 Paper AIAA 2005 0202
[22] Macheret S O, Shneider M N, Miles R B 2002 AIAA J 40 74
[23] Gudmundsson J T 2005 Univ. Iceland Tech. Rep. RH-09-2005
[24] Gudmundsson J T 2002 Univ. Iceland Tech. Rep. RH-21-2002
[25] Zhou Q H, Dong Z W 2011 Acta Phys. Sin. 62 015201 (in Chinese) [周前红, 董志伟 2011 62 125201]
[26] Phelps A V, Pitchford L C 1985 Phys. Rev. A 31 2932
[27] Itikawa Y, Hayashi M, Ichimura A, Onda K, Sakimoto K, Takayanagi K 1986 J. Phys. Chem. Ref. Data 15 985
[28] Itikawa Y 2009 J. Phys. Chem. Ref. Data 38 2689
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