**6. Characteristics of the neon discharge through entering data of the BOLSIG+**

In this part, we will investigate the characteristics of the neon abnormal glow discharge through entering data of the BOLSIG+ code. The gas pressure is 3 Torr. The applied voltage is 300 V. The secondary electron emission coefficient is 0*:*26 [51]. Additional parameters are declared in the Appendix A. **Figure 8** shows the curves of ion and electron densities (**Figure 8(a)**), metastable atom concentration

**Figure 5.**

**85**

*in the stationary state for input data of BOLSIG+.*

*Argon spatial distributions of (a) particledensities, (b) metastable atom density, and (c) mean electron energy*

*Calculation of the Metastable Atom Densities in Argon and Neon Abnormal Glow Discharges*

*DOI: http://dx.doi.org/10.5772/intechopen.84293*

*Calculation of the Metastable Atom Densities in Argon and Neon Abnormal Glow Discharges DOI: http://dx.doi.org/10.5772/intechopen.84293*

#### **Figure 5.**

**Figure 6** shows the comparison amidst of the experimental results [47, 48] and our results got beginning database of BOLSIG+ code for pd = 2 Torr cm. We remind that the experimental results [47, 48] are given for the diameter of the electrode equal to 8 cm and the inter-electrodes spacing equal to 1 cm. We remind again that the results obtained by Ref. [47] its approximately dissimilar to the results obtained by Ref. [48] due to the experimental circumstances of the secondary electron emission coefficient. We remark that our results got from database of BOLSIG+

*Solid State Physics - Metastable, Spintronics Materials and Mechanics of Deformable…*

We remind that the preceding computations are effected through the metastable lifetime equal to 1 μs [30], we remind that this value has been proposed by Becker et al. [30]. **Figure 7** represents the effect of the metastable lifetime on the curve of the metastable atom concentration in the study state. For this reason we have used a value of metastable lifetime equal to 56 s of the theories [49] and an experimental value equal to 38 s [50]. We remark that the most of the metastable atom concen-

noticed just for metastable atom concentration and all characteristic of argon abnormal glow discharge rest unmoved in the study stated. As a consequence, the utilization of the experimental or artificial value of the metastable lifetime has an

**6. Characteristics of the neon discharge through entering data**

In this part, we will investigate the characteristics of the neon abnormal glow discharge through entering data of the BOLSIG+ code. The gas pressure is 3 Torr. The applied voltage is 300 V. The secondary electron emission coefficient is 0*:*26 [51]. Additional parameters are declared in the Appendix A. **Figure 8** shows the curves of ion and electron densities (**Figure 8(a)**), metastable atom concentration

. We note that this effect is

code are in excellent accord with the experimental results [47].

*The major differences between our results and those given by Becker et al.*

tration augments from 7.76 <sup>10</sup><sup>9</sup> to 2.249 <sup>10</sup><sup>11</sup> cm<sup>3</sup>

inconsequential of the abnormal glow discharge characteristics.

**abnormal glow discharge**

**Table 2.**

**of the BOLSIG+**

**84**

**5.1 Effect of the metastable lifetime on the characteristics of argon**

*Argon spatial distributions of (a) particledensities, (b) metastable atom density, and (c) mean electron energy in the stationary state for input data of BOLSIG+.*


#### **Table 3.**

*The major differences between input Data of BOLSIG+ and those given by multiterm approximation.*

#### **Figure 6.**

*Comparison between the results obtained by our calculation using database of BOLSIG+ software for pd = 2 Torr cm and those given by experimental for pd = 2 Torr cm in Argon gas.*

#### **Figure 7.**

*Influence of the metastable lifetime on the Argon spatial distribution of metastable atom density in the steady state.*

(**Figure 8(b)**) and current density (**Figure 8(c)**) depending of the applied voltage in the stationary state. We note that the greatest of the metastable atom concentration is equal to 1.615 <sup>10</sup><sup>11</sup> cm<sup>3</sup> . The value of neon current density is 0*:*1851 mA/ cm2 . The electric field at the cathode achieves the value of 1696*:*08 V/cm. We note

**Figure 8.**

**87**

*function of applied potential in the stationary state.*

*Neon spatial distributions of (a) particle densities, (b) metastable atom density, and (c) current density as a*

*Calculation of the Metastable Atom Densities in Argon and Neon Abnormal Glow Discharges*

*DOI: http://dx.doi.org/10.5772/intechopen.84293*

*Calculation of the Metastable Atom Densities in Argon and Neon Abnormal Glow Discharges DOI: http://dx.doi.org/10.5772/intechopen.84293*

**Figure 8.**

*Neon spatial distributions of (a) particle densities, (b) metastable atom density, and (c) current density as a function of applied potential in the stationary state.*

(**Figure 8(b)**) and current density (**Figure 8(c)**) depending of the applied voltage in the stationary state. We note that the greatest of the metastable atom concentra-

*Influence of the metastable lifetime on the Argon spatial distribution of metastable atom density in the steady*

*The major differences between input Data of BOLSIG+ and those given by multiterm approximation.*

*Solid State Physics - Metastable, Spintronics Materials and Mechanics of Deformable…*

*Comparison between the results obtained by our calculation using database of BOLSIG+ software for pd = 2*

*Torr cm and those given by experimental for pd = 2 Torr cm in Argon gas.*

. The electric field at the cathode achieves the value of 1696*:*08 V/cm. We note

. The value of neon current density is 0*:*1851 mA/

tion is equal to 1.615 <sup>10</sup><sup>11</sup> cm<sup>3</sup>

cm2

**86**

*state.*

**Figure 7.**

**Table 3.**

**Figure 6.**

that the most of the mean electron energy is 46*:*30 eV in the cathodic region. As a consequence, the fluid model by injecting the metastable atom concentrations is extremely important for investigating the abnormal glow discharge properties of several pure gases and mixed gas.
