Table 1. Properties of the different dome materials (Ensinger, 2020 ▸; Henke et al., 1993 ▸).
In addition to the currently available domes made of polyether ether ketone (PEEK), polystyrene (PS) and polycarbonate (PC), we also listed the properties of prospective beryllium (Be) and polyimide (Kapton) domes. The upper limit of the temperature range is determined by the glass transition temperature. Mo Kα at 17.5 keV and Cu Kα radiation at 8.0 keV.
| PC | PS | PEEK | Be | Kapton | |
|---|---|---|---|---|---|
| Color | Transparent | White | Brown/gray | Gray | Orange/brown |
| Assumed sum formula | C15H16O2 | C8H8 | C19H12O3 | Be | C22O5N2H10 |
| Density (g cm−3) | 1.20 | 1.00 | 1.32 | 1.85 | 1.42 |
| Thickness (mm) | 1.2 | 1.6 | 1.0 | 0.5 | 0.25 |
| Price (Euros) | 30 | 30 | 1800 | 11000 (+500) | 180 (+3500) |
| Temperature range (K) | 213…398 | 263…343 | 173…533 | …1560 | …633 |
| TM† Mo Kα | 0.854 | 0.861 | 0.861 | 0.961 | 0.957 |
| TM† Cu Kα | 0.232 | 0.272 | 0.242 | 0.827 | 0.656 |
| AL‡, Mo Kα (mm) | 15.162 | 21.428 | 13.331 | 25.339 | 11.512 |
| AL‡, Cu Kα (mm) | 1.642 | 2.455 | 1.410 | 5.276 | 1.187 |
| Radiation stability (kGy) | 1000 | <1000 | 20000 | ∞ | 40000 |
†
Transmission, double passage through the dome (in and out).
‡
Attenuation length, at 90° glancing angle.