Magnitude of magnetogyric ratio of Frequency, cis 1 v 1e electron v Subscript denoting value in 1-c/s inter- 4 1 val = P,ogee/2m= 2n X 3. 5218 X 10 seC (amp/m)-1 Total bandwidth to half-power, cis Vb 0 Dielectric loss angle = arc tan (E" / E') Collision frequency, cis Vc Cyclotron frequency = eBo/2nm Skin depth in a metal = VT2/wp,p, a)m Ve Os o 2 LI v Half-width of spectral line (from centre Plasma frequency= (in) V(N e/mEiJ cis vp 3 to half-power), cis Volume charge density=N e coulombs/m e Relative permittivity = E' - j c" Reflection factor 8 e 2 2 Electric space constant = (P, ct1 a Scattering cross section, m o EO 12 "'" 8. 85416 X 10- farad/m u Conductivity = a' - j a" mhos/m Efficiency Relaxation time T rJ Efficiency of antenna = Ae/A Transmission factor rJA {} Relative temperature, deg K Spin-lattice relaxation time, sec ·1 q, ){ Absorption index=ocit/2n Magnetic flux, webers o Wavelength, m Gravitational potential it t1J Wavelength in waveguide, m Susceptibility = X' - j X" Ag X Free-space wavelength, m w Angular frequency = 2n v rad/sec Ao Relative permeability = p,' - jp," Angular velocity, rad/sec w Jl 2 p, Drift mobility of carriers, m/volt-sec Cyclotron angular frequency we BOHR'S magneton=p, eh/2m P,B o o = e Bo/m rad/sec 29 =1. 16529 X 10- weber-m 0 Subscript denoting d. c. , static, or steady I. General principles. a) Electromagnetic radiation.

Inhalt
Low Noise Amplification..- I. Introduction.- II. Noise factor, noise temperature and noise measure.- III. Measurement of low noise temperature.- IV. Grid control tube and transistor amplifiers.- V. Low-noise traveling-wave tube amplifiers.- VI. Parametric amplifiers.- VII. Tunnel diode amplifier.- VIII. Conclusion.- Measurement Methods and Instruments for Microwave Frequencies.- List of symbols.- References.- Messung von Magnetfeldern.- 1. Resonanzmethoden.- 2. Nichtlinearität der B-H-Kurve ferromagnetischer Materialien.- 3. Induktionsspulen.- 4. Galvanomagnetische Effekte in Halbleitern.- 5. Sonstige Methoden.- Literatur.- Recording of Measuring Data.- A. Analogue and digital recording.- B. Means of recording.- C. Analogue recording methods.- D. Digital recording methods.- E. Standard recording equipment for a laboratory and outlook.- Literature.- Frequency and Time Measurements.- A. Introduction.- B. Time and frequency references.- C. Frequency measuring instruments and techniques.- D. Time interval measurements.- References.- Temperaturmessung.- A. Temperaturskala und Thermometerarten.- B. Elektrische Berührungsthermometer.- C. Verfahren und Geräte zur Thermospannungs- und Widerstandsmessung.- D. Einbau von Berührungsthermometern.- E. Zeitverhalten von Thermometern.- F. Strahlungspyrometer.- Literatur.- Temperaturregelung.- A. Begriffe und Benennungen.- B. Die Regelstrecke.- C. Der lineare Regler.- D. Der lineare Regelkreis.- E. Regelkreise mit nichtlinearen Gliedern.- F. Beispiele für Temperaturregelungen.- Symbolliste.- Literatur.