LIFETIMES OF NONEQUILIBRIUM CARRIERS IN MAGNETIC TRAPS,
Abstract
Nonequilibrium electrons and holes in approximately equal density are produced in p-InSb at 77 K by forcing a current greater than ohmic through the sample. The density decays exponentially after an initial rapid decay occurring in < or equivalent to 200 nsec. The lifetime in the exponential region is 0.92 = 0.05 microsecond in the nonequilibrium carrier density range 0.9 to 2.1 x 10 to the 13th power cm to the -3rd power when no magnetic fields are applied. The excess carrier density in the presence of a magnetic trap compared with that in its absence after a given decay time is observed to be enhanced by as much as 65%. The trap configuration used in these measurements is achieved by superposition of three static fields: (A) a uniform axial one, H sub a; (B) a symmetric non-uniform axial field emanating from two current coils located one each in the planes of the sample ends, H sub em, where em signifies 'end mirror'; (C) an axially symmetric transverse field in the form of a quadrupolar cusp, H sub wm, where wm signifies 'wall mirror'. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- AD0602322
Entities
People
- Betsy Ancker-johnson
- Michael F. Berg
Organizations
- Boeing