Abstract: A compact telescope array was developed and applied in the experimental study of ¹⁶C cluster structure. Good energy resolution and position resolution were achieved. There are 9 telescopes in the array. One telescope consists of two single-sided silicon strip detectors and one segmented CsI(Tl) unit. The other 8 telescopes consist of one size Si detector, one position sensitivity detector and one segmented CsI(Tl) unit. The segmented CsI(Tl) unit consists of four 25 mm×26 mm×26 mm CsI (Tl) crystals, which are coupled with photodiodes. It was tested with ²⁴¹Am alpha source in different envelope and coupling methods. The working condition was optimized to get good energy resolution.