Catalog of Technical Reports


Book Description













Magnetic Recording Handbook


Book Description

When I started in magnetic recording nearly fifty years ago, it was easy to perceive the common sense of it. There was very little mathematics and every new finding was a source of wonder. I have tried to recapture this spirit with simple explanations, while maintaining a high density of infonnation and cov ering the entire field. This book introduces a novice to magnetic recording and its many branches. It includes reference data for designers and users. Each chapter stands by itself; no prerequisites are essential. For a quick survey, the equations and worked out examples can be disregarded. The magnetic recording art is changing so rapidly that new advances are announced almost every month. These are properly covered by journal articles and manufacturers' catalogs. This book will fulfil its purpose if it gives a back ground for easily comprehending the new advances. I have included subjects and devices not found elsewhere, and some unconventional viewpoints. I would welcome comments from readers. To Jay McKnight I am deeply grateful for important suggestions and helpful comments. I appreciate also the help of BASF, John Boyers, Joseph Dundovic, Charles Ginsburg, Peter Hammar, Yasuo Imaoka, Hal Kaitchuk, Otto Kornei, Harold Miller, Jack Mullin, Jim Novak, Lenard Perlman, Carl Powell, Sidney Rubens, John Shennan, Shigeo Shima, Heinz Thiele, Yoshimi Watanabe and many others; and to my daughter Ruth for typing.







Magnetic Tape Recording


Book Description




Electrical Instruments / Elektrische Instrumente


Book Description

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 ยท1 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.