4 Gaseous Detectors
107
Fig. 4.9 Transverse diffusion for 1 cm drift in Ar/CH 4 mixtures; CH 4 % is indicated [36].
Fig. 4.10 Transverse and longitudinal diffusion for 1 cm drift up to higher E fields [30]
A magnetic field B along z will cause electrons to move in circles in the x-y
projections in between collisions. The random propagation is diminished and the
transverse diffusion will be reduced:
D T (ω) /D T (0) = 1/
1 + ω
2 τ
2
.
(4.37)
107
Fig. 4.9 Transverse diffusion for 1 cm drift in Ar/CH 4 mixtures; CH 4 % is indicated [36].
Fig. 4.10 Transverse and longitudinal diffusion for 1 cm drift up to higher E fields [30]
A magnetic field B along z will cause electrons to move in circles in the x-y
projections in between collisions. The random propagation is diminished and the
transverse diffusion will be reduced:
D T (ω) /D T (0) = 1/
1 + ω
2 τ
2
.
(4.37)