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Thesis for the degree of Doctor of
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Multipactor in Low Pressure Gas and
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Conference contributions by the aut
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viii
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3.2.4 Key findings . . . . . . . .
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xii
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xiv
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addition, it is difficult to make c
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numerical study of the phenomenon i
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to physically damage microwave comp
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odd positive integer (N = 1,3,5...)
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σ se [−] 2.5 2 1.5 1 0.5 W 1 W m
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Voltage [V] 10 4 10 3 10 2 10 0 N=1
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even though it may be sufficient fr
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where φL and φR are the left and
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(cf. Fig. 2.7). When taking the env
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2.1.4 Methods of suppression Many o
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Noise (dBm) Power #1 (dBm) Match #1
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andom spread in emission velocities
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Figure 2.12: Multipactor experiment
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where kn is a factor determining th
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allows for another design margin, w
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Boundary function Method One of the
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carriers, because the NLSQ method r
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multipactor discharge. Using a Mont
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the assumption of a constant ratio
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Voltage (V) 10 3 10 2 10 1 10 −2
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3.1.3 Main results The main result
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lytical model is obviously needed.
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where 〈vt 2 〉 represents the av
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these quantities in the range from
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analytical. Attempts were made to f
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only model, the inclusion of ionisa
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Normalised Voltage 1.1 1.05 1 0.95
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Voltage [V] 10 3 10 0 µ=0 µ=0.75
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Chapter 4 Multipactor in irises A c
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h l Figure 4.1: The geometry used i
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N e /N 0 [−] 3 2.5 2 1.5 1 Multip
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to compensate for electron losses i
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4.4 Main results This analysis has
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support for the qualitative analyti
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where R(t) is the average position,
- Page 88 and 89: where d stands for the gap width, V
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- Page 92 and 93: Phase [degrees] 60 50 40 30 20 10
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- Page 107 and 108: Chapter 6 Detection of multipactor
- Page 109 and 110: Amplitude of acceleration [Gm/s 2 ]
- Page 111 and 112: tipactor events that are short-live
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- Page 115 and 116: ditional test sample, a resonant ca
- Page 117 and 118: the FFT. It was concluded that ther
- Page 119 and 120: 6.2.1 Single carrier When using the
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- Page 123 and 124: Amplitude [A.U.] 2.5 2 1.5 1 0.5 De
- Page 125 and 126: Chapter 7 Conclusions and outlook T
- Page 127 and 128: tioned there were multipactor in no
- Page 129 and 130: References [1] W. Henneberg, R. Ort
- Page 131 and 132: [27] A. Ruiz et al, “Ti, V, and C
- Page 133 and 134: [51] D. Wolk, D. Schmitt, and T. Sc
- Page 135 and 136: [75] R. Udiljak, Multipactor in low
- Page 137: Included papers A-F 123
- Page 143: Paper C R. Udiljak, D. Anderson, M.
- Page 147: Paper E R. Udiljak, D. Anderson, M.