Abstract

A liquid helium target has been developed which allows the detection of low energy charged particles originating from a nuclear reaction in the target over a large angular acceptance (nearly 360° in the horizontal, and ±50° in the azimuthal direction). The design, construction and testing of the target is presented. Special care has been taken to construct the target container windows with minimal mass density. The liquid helium, within the region of acceptance of the incident beam, constituted 80% of the complete target mass in the beam leading to low background count rates. The very thin windows (45 mg/cm 2) resulted in low thresholds for the detection of charged reaction products.

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