Thermonuclear gain of ICF targets with direct heating of ignitor

As the way of decreasing of the driver energy which is needed for ignition of the LCF targets, the conception of separation of the process of compression of the main mass of the fuel and the process of heating of the ignitor is suggested. Thermonuclear gain of the target with direct heating of the ignitor is calculated. It's shown that using the target with direct heating of the ignitor may lead to considerable decreasing of the driver energy: in (10–20) times for “breakeven,” and in (5–10) times for thermonuclear gain of 100–300 in comparison with the traditional conception of simultaneous compression and heating of the ICF target.