ε (eV)

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T e (<strong>eV</strong>) 6 5 4 3 2 1 0 100 200 300 400 P (W) 4x10 10 3x10 10 2x10 10 Figure 2.7: Estimation of the plasma density and electron temperatures from the I(V ) characteristics of the Langmuir probe. The RF power applied was varied between 100W and400 W. 2.4.2 Measurement of the plasma light emission 10 10 Light plasma emission was analyzed with a Jobin Yvon spectrometer model DA−40. The optical emission was monitored with a quartz optical and the signal was fed to a monochromator, as shown in Fig. 2.8. This is connected to a central unit (controller) which commands the sweeping of the whole wavelengths interval. The spectra were analyzed within the 300 and 850 nm wavelength interval, due 39 n e (cm -3 )
Figure 2.8: Experimental set-up used for measurement of plasma light emission. to the physical limitations of the monochromator. The spectra were recorded and observed by a digital oscilloscope (Tektronix TDS3032) directly connected to monochromator. 40
Page 1 and 2: PLASMA STERILIZATION USING LOW PRES
Page 3 and 4: my appreciation especially for the
Page 5 and 6: Iis ion saturation current [µA] t
Page 7 and 8: CONTENTS 1 PRINCIPLES OF SURFACE DI
Page 9 and 10: 4 EFFECTS OF LOW TEMPERATURE PULSED
Page 11 and 12: and intuited to bring new important
Page 13 and 14: Figure 1.1: Schematic representatio
Page 15 and 16: Table 1.1: Common disinfection and
Page 17 and 18: the radiation energy is resonantly
Page 19 and 20: ers of heat, optical radiation and
Page 21 and 22: Table 1.2: Main plasma sources used
Page 23 and 24: microorganism population as a respo
Page 25 and 26: UV Photon Before After DNA Figure 1
Page 27 and 28: to sterilize medical tools, but the
Page 29 and 30: sented by both theoretical and expe
Page 31 and 32: Plasma Sterilization Using Low Pres
Page 33 and 34: Figure 2.1: Experimental set-up. MB
Page 35 and 36: Figure 2.3: Electronic circuit of t
Page 37 and 38: such circumstances, the inactivatio
Page 39 and 40: ment time t is N = N0e −αt ≡ N
Page 41 and 42: shows the number of the viable micr
Page 43 and 44: has n −1 0 > 281.25 µm 2 availab
Page 45 and 46: 1 st 2 nd ( I) TNTC (II) TNTC (III)
Page 47: U LC blocking filter 19.74 pF 20.24
Page 51 and 52: the reactive species from plasma ar
Page 53 and 54: Temperature measurement Relative in
Page 55 and 56: MR MP SH Figure 3.2: Experimental a
Page 57 and 58: a fast temperature increasing rate.
Page 59 and 60: D h (min) 10 3 10 2 10 1 10 0 100 2
Page 61 and 62: MR QP SH Figure 3.6: Experimental a
Page 63 and 64: The contribution of photons and hea
Page 65 and 66: D (min) 10 3 10 2 10 1 10 0 Dν D h
Page 67 and 68: N/N 0 (%) 10 2 10 2 10 2 10 2 10 2
Page 69 and 70: D (min) 10 2 10 1 10 0 D h+ν+p D h
Page 71 and 72: holder is mainly given by particle
Page 73 and 74: 3.5 Power sensitivity of spore inac
Page 75 and 76: If for a reference treatment temper
Page 77 and 78: of the sample was achieved. Moreove
Page 79 and 80: microorganisms were disposed in mon
Page 81 and 82: The pulse period covered a wide int
Page 83 and 84: in chapter 2. The treatment time of
Page 85 and 86: 4.2.2 Injected RF power In order to
Page 87 and 88: ton =500µs, and the duty cycle was
Page 89 and 90: T ( 0 C) 120 100 80 60 40 20 I 0 5
Page 91 and 92: N/N 0 (%) 10 2 10 2 10 2 10 1 10 1
Page 93 and 94: elow 70 ◦ C. 3. Increasing the in
Page 95 and 96: the second phase of the inactivatio
Page 97 and 98: k 1, 2 (min -1 ) 1.2 1.0 0.8 0.6 0.
Page 99 and 100:
I (arb. unit) 140 120 100 80 60 40
Page 101 and 102:
I (arb. unit) 5 4 3 2 1 0 0.000 0.0
Page 103 and 104:
I > (arb.unit) 1.0 0.9 0.8 0.7 0.6
Page 105 and 106:
shown in Fig. 4.14. It can be seen
Page 107 and 108:
I is (mA) 0.25 0.20 0.15 0.10 0.05
Page 109 and 110:
value. When ton has been kept const
Page 111 and 112:
survival curve characteristics were
Page 113 and 114:
of the effects produced by differen
Page 115 and 116:
solutely necessary for a profound u
Page 117 and 118:
Conferences 1. Bacillus spores ster
Page 119 and 120:
[9] W. A. Rutala, D. J. Weber, J. H
Page 121 and 122:
[34] J. H. Young: Sterilization wit
Page 123 and 124:
[57] M. K. Boudam, M. Moisan, B. Sa
Page 125 and 126:
[79] J. Schneider, K. M. Baumgartne
Page 127 and 128:
[100] S. Villeger, S. Cousty, A. Ri
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