Characteristics of electromagnetic radiation and the interference protection on a small-sized direct-acting electron accelerator with a plasma opening switch

Abstract

An experimental study of the parameters of electromagnetic and X-ray radiation was carried out on a small-sized direct-acting electron accelerator with inductive storage and a plasma opening switch. Frequency spectra have been determined, and the diagnostics of the power of the microwave component of the spectrum has been tested. An analytical comparison of radiation signals and power signals has been carried out. A method for determining the directivity pattern using a broadband power sensor has been proposed. An anechoic chamber and a reflective screen were used to suppress interference.

Figures (10)

• Figure 1: General view of the DAEA DIN-2K with no interference-absorbing screen (photo on the left) and with a screen.
• Figure 2: 1 – IES; 2 – vacuum diode; 3 – cathode; 4 – anode chamber housing; 5 – anode grid; 6 – POS, 7 – electron beam, 8 – virtual cathode; 9 – electron beam after passing through the virtual cathode; 10 – marking of the main sources of interference and useful signals; 11 – metal solid screen; 12 – ferrite radio-absorbing plates of the anechoic chamber; BCC – beam current collector; EMR – targeted electromagnetic radiation; CVD– capacitive voltage divider; XRS– X-ray sensor; RC1, RC2 – Rogowski coils; HA – receiving horn antenna; D1, D2 – controlled air dischargers.
• Figure 3: Dependence of the beam current strength and X-ray dose on the discharge voltage of the main circuit of the DAEA.
• Figure 4: Current oscillogram, curve 1, and the interference signal, curve 2.
• Figure 5: Chronogram of the signals prior to the arrangement of the protection screen.