The detecting system of HXMT consists of 18 modules that contain a slat collimator and a NaI(Ti)/CsI(Na) phoswich detector each. Every module has a field of view (FOV) of and collecting area of 286 cm2. The long axes of the FOVs of the two neighboring modules differ by . So the overall FOV of HXMT is about and the total collecting area about 5000 cm2.

Fig 1: The detector assembly.

Fig 2: The exploded view of the satellite.

The main characteristics of HXMT are listed below:
  • Detector: NaI(Tl)/CsI(Na) (3.5/40mm)
  • Collecting Area: ~5000cm2
  • Energy Range: 20~250 keV
  • Field of View: 5.7.AN0N45.7N0 (FWHM)
  • Energy Resolution: ~22% (@60keV)
  • Locating Accuracy: $A!\(B1.AN4(20$A&R(B)
  • Spatial Resolution: $A!\(B5.AN4(20$A&R(B)
  • Sensitivity: 3.0.ANW10-7 ph cm-2 s-1 keV-1(3$A&R(B@100keV, 105s)
  • Time Resolution: 25ms