Compact Plasma and Focused Ion Beams

48 Compact Plasma and Focused Ion Beams

Initial measurements are performed with a 3-mm-diameter coil, and for

advanced experiments a 1-mm coil is used. One end of the coil is soldered

to the 2-mm exposed micro-coax, while the other end is wrapped around

the exposed portion tightly to prevent pickup of the electric eld, and then

soldered to the outer ground shielding of the micro-coax. Figure 3.13a shows

the schematic of the loop orientations with respect to the MC for measure-

ment of

〈〉||,B

z

2

〈〉||,B

q

2

and

〈〉||,B

r

2

and Figure 3.13b gives a digital photograph

of one of the fabricated probes used for measuring the radial variation of

〈〉

B

z

2

and ...