Posted on Jul 31, 2015 12560
Parts List R1 2.2K R2 27Ω R3 220Ω R4-R5 100MΩ C1 0.47µF/50V
C2-C3 0.047µF to 0.068µF C4 1µF/100V C5-C16 0.001µF/15KV D1-D12 22KV 5mA Avalanche Diodes Q1 MJE3055, TO-220 NPN T1 2100:8:8 BH1 8 Cell AA Battery Holder HS1 Heat Sink Bracket
Electrons gather at sharp points in metals. Electrons are emitted from a needle like sharp point as shown in Fig. 2. A negatively-charged plate may be used as an electron reflector to focus electrons along a line, thus producing a tight beam as shown in Fig. 1(b). Even a tighter beam is possible if the needle point is replaced with the structure shown in Fig. 1(c), though experimental verification is needed. To avoid loss due to corona, the entire wire and the reflector, except the sharp emitter, should be covered by an isolating material such as silicon etc. and surface variations should be very smooth.
Configuration shown in Fig. 3 can be used to bunch electrons using a magnetic field. Later, if the magnetic field is cut rapidly, bunched electrons are released and due to the focusing effect of the negatively charged reflector (NCR), they can be launched on to a target. A pulsed magnetic field would do the job if it’s generated by a pulsed capacitor discharge. So, if a HV capacitor is discharged on to a solenoid through an...