<p>A single crystal CVD diamond detector was developed to explore its potential for high-resolution neutron spectroscopy of a D-T fusion source. In contrast to previous efforts, the challenge of achieving high-quality ohmic or Schottky contacts was addressed through a straightforward cleaning procedure and the use of pressure-adhered indium foil. When exposed to high-energy neutron sources, including ²⁴¹Am-Be and D-T fusion, the contacts successfully collected charge from both the ¹²C(n,n′) and ¹²C(n,α) reactions, achieving spectroscopic quality. The detector, paired with the ultra-low-noise preamplifier, provided high-resolution neutron spectra, demonstrating the viability of this approach.</p>