The VPC series valve-type cracking source is designed for P material evaporation and can provide effective and stable phosphorus beam in ultra-high vacuum environment. Red phosphorus material is heated in a large-capacity crucible to form phosphorus vapor, which is converted into white phosphorus with a more stable beam under the condensation effect of the air-cooled interlayer in the white phosphorus area. After passing through the beam regulating valve, it enters the cracking area and forms a P2 beam with high reaction activity after high-temperature cracking. The valve of the VPC cracking source can realize precise control of beam transient changes and complete closure. In addition, the valve has its own torque feedback, which can realize fully automatic zero calibration. The uniquely designed diffuser plate structure can control the beam distribution state and improve the beam uniformity.
| ● High-precision beam control valve | ● Three temperature zones are independently controlled, and the highest temperature in the cracking zone can reach 1400℃ | ● Suitable for large-capacity crucibles |
| ● Temperature stability is better than ±0.2℃ | ● The cracking area is equipped with an independent water cooling jacket, which can be removed separately |
| Evaporation source model | VPC500 | VPC5000 | |
| Crucible volume (cc) | 500 | 5000 | |
| Mounting flange size | CF35 | CF100 | |
| Length in vacuum (mm) | 306 | 271.1 | |
| Vacuum inner and outer diameter (mm) | 36.4 | 62 | |
Crucible size (mm) | diameter | 58 | 59.5 |
| high | 90.5 | 156 | |
| Highest outgassing Temperature(℃) | cleavage zone | 1200 | |
| white phosphorus area | 500 | ||
| red phosphorus zone | / | ||
Common tasks Temperature(℃) | cleavage zone | 800-1000 | 900-1000 |
| white phosphorus area | 150-200 | ||
| red phosphorus zone | 150-200 | 150-250 | |
| temperature stability | ≤±0.2℃ | ||
| valve driver | Stepper Motor | ||
| beam Flow change range | 2-3 orders of magnitude change | ||
| Water Cooling Jacket | The evaporation zone is equipped with a standard water cooling jacket, and the cracking zone water cooling jacket is optional | ||
| Baking temperature | 250℃ | ||
| order code | 3205010069 | 3205010039 | |
For information on compatibility of VPC pyrolysis sources with Riber or Veeco MBE systems, please contact Fermian Instruments
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